Form990-PF

Department of the Treasury
Internal Revenue Service

Return of Private Foundation
or Section 4947(a)(1) Trust Treated as Private Foundation
right arrowDo not enter social security numbers on this form as it may be made public.
right arrowGo to www.irs.gov/Form990PF for instructions and the latest information.
OMB No. 1545-0047
2024
Open to Public Inspection
For calendar year 2024, or tax year beginning 01-01-2024 , and ending 12-31-2024
Name of foundation
TINBERG FOUNDATION
 
Number and street (or P.O. box number if mail is not delivered to street address)159 SHERIDAN RD
  Room/suite
City or town, state or province, country, and ZIP or foreign postal code
WINNETKA, IL60093
A Employer identification number

36-3742179
B Telephone number (see instructions)

(847) 441-9152
C right arrow
G Check all that apply:

D 1. Foreign organizations, check here............. right arrow
2. Foreign organizations meeting the 85%
test, check here and attach computation ... right arrow
E right arrow
H Check type of organization:
F right arrow
I Fair market value of all assets at end
of year (from Part II, col. (c),
line 16)right arrow$5,057,572J Accounting method:
 
(Part I, column (d) must be on cash basis.)
Part I Analysis of Revenue and Expenses (The total of amounts in columns (b), (c), and (d) may not necessarily equal the amounts in column (a) (see instructions).) (a) Revenue and
expenses per
books 		(b) Net investment
income 		(c) Adjusted net
income 		(d) Disbursements
for charitable
purposes
(cash basis only)
Revenue 1 Contributions, gifts, grants, etc., received (attach schedule) 1,010,771
2 Check right arrow.............
3 Interest on savings and temporary cash investments 4,682 4,682  
4 Dividends and interest from securities... 54,253 54,253  
5a Gross rents............      
b Net rental income or (loss)  
6a Net gain or (loss) from sale of assets not on line 10 237,672
b Gross sales price for all assets on line 6a 1,148,962
7 Capital gain net income (from Part IV, line 2)... 237,672
8 Net short-term capital gain.........  
9 Income modifications...........  
10a Gross sales less returns and allowances  
b Less: Cost of goods sold....  
c Gross profit or (loss) (attach schedule).....    
11 Other income (attach schedule).......      
12 Total. Add lines 1 through 11........ 1,307,378 296,607  
Operating and Administrative Expenses 13 Compensation of officers, directors, trustees, etc. 0 0   0
14 Other employee salaries and wages......        
15 Pension plans, employee benefits.......        
16a Legal fees (attach schedule).........        
b Accounting fees (attach schedule).......        
c Other professional fees (attach schedule).... Click to see attachment
List of Attached Documents:
// Content
22,556 22,556   0
17 Interest............... 21 21   0
18 Taxes (attach schedule) (see instructions)... Click to see attachment
List of Attached Documents:
// Content
7,459 0   0
19 Depreciation (attach schedule) and depletion...      
20 Occupancy..............        
21 Travel, conferences, and meetings.......        
22 Printing and publications..........        
23 Other expenses (attach schedule)....... Click to see attachment
List of Attached Documents:
// Content
25 0   25
24 Total operating and administrative expenses.
Add lines 13 through 23.......... 30,061 22,577   25
25 Contributions, gifts, grants paid....... 758,000 758,000
26 Total expenses and disbursements. Add lines 24 and 25 788,061 22,577   758,025
27 Subtract line 26 from line 12:
a Excess of revenue over expenses and disbursements 519,317
b Net investment income (if negative, enter -0-) 274,030
c Adjusted net income (if negative, enter -0-)...  
For Paperwork Reduction Act Notice, see instructions.
Cat. No. 11289X Form 990-PF (2024)
Form 990-PF (2024)
Page 2
Part II Balance Sheets Attached schedules and amounts in the description column
should be for end-of-year amounts only. (See instructions.) 		Beginning of year End of year
(a) Book Value (b) Book Value (c) Fair Market Value
Assets 1 Cash—non-interest-bearing............. 26,183 91,966 91,966
2 Savings and temporary cash investments.........      
3 Accounts receivable right arrow  
Less: allowance for doubtful accounts right arrow        
4 Pledges receivable right arrow  
Less: allowance for doubtful accounts right arrow        
5 Grants receivable.................      
6 Receivables due from officers, directors, trustees, and other
disqualified persons (attach schedule) (see instructions).....      
7 Other notes and loans receivable (attach schedule) right arrow  
Less: allowance for doubtful accounts right arrow        
8 Inventories for sale or use..............      
9 Prepaid expenses and deferred charges..........      
10a Investments—U.S. and state government obligations (attach schedule)      
b Investments—corporate stock (attach schedule)....... 1,980,818 Click to see attachment
List of Attached Documents:
// Content
2,027,914 		4,068,264
c Investments—corporate bonds (attach schedule)....... 690,607 Click to see attachment
List of Attached Documents:
// Content
919,316 		897,342
11 Investments—land, buildings, and equipment: basis right arrow  
Less: accumulated depreciation (attach schedule) right arrow        
12 Investments—mortgage loans.............      
13 Investments—other (attach schedule)..........      
14 Land, buildings, and equipment: basis right arrow  
Less: accumulated depreciation (attach schedule) right arrow        
15 Other assets (describe right arrow)      
16 Total assets (to be completed by all filers—see the
instructions. Also, see page 1, item I) 2,697,608 3,039,196 5,057,572
Liabilities 17 Accounts payable and accrued expenses..........    
18 Grants payable.................    
19 Deferred revenue.................    
20 Loans from officers, directors, trustees, and other disqualified persons    
21 Mortgages and other notes payable (attach schedule)......    
22 Other liabilities (describe right arrow) Click to see attachment
List of Attached Documents:
// Content
1,737 		Click to see attachment
List of Attached Documents:
// Content
5,127
23 Total liabilities (add lines 17 through 22)......... 1,737 5,127
Net Assets or Fund Balances Foundations that follow FASB ASC 958, check here right arrow
and complete lines 24, 25, 29 and 30.
24 Net assets without donor restrictions...........    
25 Net assets with donor restrictions............    
Foundations that do not follow FASB ASC 958, check here right arrow
and complete lines 26 through 30.
26 Capital stock, trust principal, or current funds........ 0 0
27 Paid-in or capital surplus, or land, bldg., and equipment fund 0 0
28 Retained earnings, accumulated income, endowment, or other funds 2,695,871 3,034,069
29 Total net assets or fund balances (see instructions)..... 2,695,871 3,034,069
30 Total liabilities and net assets/fund balances (see instructions). 2,697,608 3,039,196
Part III
Analysis of Changes in Net Assets or Fund Balances
1
Total net assets or fund balances at beginning of year—Part II, column (a), line 29 (must agree with end-of-year figure reported on prior year’s return) ...............
1
2,695,871
2
Enter amount from Part I, line 27a .....................
2
519,317
3
Other increases not included in line 2 (itemize) right arrow
3
0
4
Add lines 1, 2, and 3 ..........................
4
3,215,188
5
Decreases not included in line 2 (itemize) right arrowClick to see attachment
List of Attached Documents:
// Content
5
181,119
6
Total net assets or fund balances at end of year (line 4 minus line 5)—Part II, column (b), line 29 .
6
3,034,069
Form 990-PF (2024)
Form 990-PF (2024)
Page 3
Part IV
Capital Gains and Losses for Tax on Investment Income
(a) List and describe the kind(s) of property sold (e.g., real estate,
2-story brick warehouse; or common stock, 200 shs. MLC Co.)		 (b)
How acquired
P—Purchase
D—Donation 		(c)
Date acquired
(mo., day, yr.) 		(d)
Date sold
(mo., day, yr.)
1 a PUBLICLY TRADED SECURITIES      
b
c
d
e
(e)
Gross sales price 		(f)
Depreciation allowed
(or allowable) 		(g)
Cost or other basis
plus expense of sale 		(h)
Gain or (loss)
(e) plus (f) minus (g)
a 1,148,962   911,290 237,672
b
c
d
e
Complete only for assets showing gain in column (h) and owned by the foundation on 12/31/69 (l)
Gains (Col. (h) gain minus
col. (k), but not less than -0-) or
Losses (from col.(h))
(i)
F.M.V. as of 12/31/69 		(j)
Adjusted basis
as of 12/31/69 		(k)
Excess of col. (i)
over col. (j), if any
a       237,672
b
c
d
e
2 Capital gain net income or (net capital loss) Bracket If gain, also enter in Part I, line 7
If (loss), enter -0- in Part I, line 7		 Bracket 2 237,672
3 Net short-term capital gain or (loss) as defined in sections 1222(5) and (6):
If gain, also enter in Part I, line 8, column (c) (see instructions). If (loss), enter -0-
in Part I, line 8 ................... 		Bracket 3  
Part V
Excise Tax Based on Investment Income (Section 4940(a), 4940(b), 4940(e), or 4948—see instructions)
1a Exempt operating foundations described in section 4940(d)(2), check here right arrow and enter “N/A" on line 1. Bracket for line 1a
Date of ruling or determination letter:   (attach copy of letter if necessary–see instructions) 1 3,809
b All other domestic foundations enter 1.39% (0.0139) of line 27b. Exempt foreign organizations enter 4% (0.04) of Part I, line 12, col. (b)
2 Tax under section 511 (domestic section 4947(a)(1) trusts and taxable foundations only. Others enter -0-) 2 0
3 Add lines 1 and 2........................... 3 3,809
4 Subtitle A (income) tax (domestic section 4947(a)(1) trusts and taxable foundations only. Others enter -0-) 4 0
5 Tax based on investment income. Subtract line 4 from line 3. If zero or less, enter -0- ..... 5 3,809
6 Credits/Payments:
a 2024 estimated tax payments and 2023 overpayment credited to 2024 6a 5,200
b Exempt foreign organizations—tax withheld at source...... 6b 0
c Tax paid with application for extension of time to file (Form 8868)... 6c 0
d Backup withholding erroneously withheld .......... 6d 0
7 Total credits and payments. Add lines 6a through 6d.............. 7 5,200
8 Enter any penalty for underpayment of estimated tax. Check here if Form 2220 is attached. 8 0
9 Tax due. If the total of lines 5 and 8 is more than line 7, enter amount owed.......right arrow 9  
10 Overpayment. If line 7 is more than the total of lines 5 and 8, enter the amount overpaid...right arrow 10 1,391
11 Enter the amount of line 10 to be: Credited to 2025 estimated taxright arrow1,391 Refundedright arrow 11 0
Form 990-PF (2024)
Form 990-PF (2024)
Page 4
Part VI-A
Statements Regarding Activities
1a
During the tax year, did the foundation attempt to influence any national, state, or local legislation or did
Yes
No
it participate or intervene in any political campaign? ....................
1a
 
No
b
Did it spend more than $100 during the year (either directly or indirectly) for political purposes? See the instructions
for the definition.................................
1b
 
No
If the answer is "Yes" to 1a or 1b, attach a detailed description of the activities and copies of any materials
published or distributed by the foundation in connection with the activities.
c
Did the foundation file Form 1120-POL for this year?.....................
1c
 
No
d
Enter the amount (if any) of tax on political expenditures (section 4955) imposed during the year:
(1) On the foundation. right arrow$ 0(2) On foundation managers.right arrow$ 0
e
Enter the reimbursement (if any) paid by the foundation during the year for political expenditure tax imposed
on foundation managers.right arrow$ 0
2
Has the foundation engaged in any activities that have not previously been reported to the IRS?.......
2
 
No
If "Yes," attach a detailed description of the activities.
3
Has the foundation made any changes, not previously reported to the IRS, in its governing instrument, articles
of incorporation, or bylaws, or other similar instruments? If "Yes," attach a conformed copy of the changes....
3
 
No
4a
Did the foundation have unrelated business gross income of $1,000 or more during the year?.........
4a
 
No
b
If "Yes," has it filed a tax return on Form 990-T for this year?...................
4b
 
 
5
Was there a liquidation, termination, dissolution, or substantial contraction during the year?.........
5
 
No
If "Yes," attach the statement required by General Instruction T.
6
Are the requirements of section 508(e) (relating to sections 4941 through 4945) satisfied either:
round bullet By language in the governing instrument, or
round bullet By state legislation that effectively amends the governing instrument so that no mandatory directions
that conflict with the state law remain in the governing instrument? ................
6
Yes
 
7
Did the foundation have at least $5,000 in assets at any time during the year? If "Yes," complete Part II, col. (c),
and Part XIV..................................
7
Yes
 
8a
Enter the states to which the foundation reports or with which it is registered (see instructions)
right arrowIL
b
If the answer is "Yes" to line 7, has the foundation furnished a copy of Form 990-PF to the Attorney
General (or designate) of each state as required by General Instruction G? If "No," attach explanation .
8b
Yes
 
9
Is the foundation claiming status as a private operating foundation within the meaning of section 4942(j)(3)
or 4942(j)(5) for calendar year 2024 or the taxable year beginning in 2024? See the instructions for Part XIII.
If "Yes," complete Part XIII .............................
9
 
No
10
Did any persons become substantial contributors during the tax year? If "Yes," attach a schedule listing their names
and addresses. ...............................
10
 
No
11
At any time during the year, did the foundation, directly or indirectly, own a controlled entity within the
meaning of section 512(b)(13)? If "Yes," attach schedule. See instructions .............
11
 
No
12
Did the foundation make a distribution to a donor advised fund over which the foundation or a disqualified person had
advisory privileges? If "Yes," attach statement. See instructions.................
12
 
No
13
Did the foundation comply with the public inspection requirements for its annual returns and exemption application?
13
Yes
 
Website addressright arrowN/A
14
The books are in care ofright arrowRICHARD ELAINE TINBERG Telephone no.right arrow (847) 441-9152

Located atright arrow159 SHERIDAN RDWINNETKAIL ZIP+4right arrow60093
15
Section 4947(a)(1) nonexempt charitable trusts filing Form 990-PF in lieu of Form 1041 —check here .........right arrow
and enter the amount of tax-exempt interest received or accrued during the year ........right arrow
15
 
16 At any time during calendar year 2024, did the foundation have an interest in or a signature or other authority over YesNo
a bank, securities, or other financial account in a foreign country? .................
16   No
See the instructions for exceptions and filing requirements for FinCEN Form 114. If "Yes", enter the name of the foreign
country right arrow
Form 990-PF (2024)
Form 990-PF (2024)
Page 5
Part VI-B
Statements Regarding Activities for Which Form 4720 May Be Required
File Form 4720 if any item is checked in the "Yes" column, unless an exception applies.
Yes
No
1a
During the year did the foundation (either directly or indirectly):
(1) Engage in the sale or exchange, or leasing of property with a disqualified person? ...........
1a(1)
 
No
(2) Borrow money from, lend money to, or otherwise extend credit to (or accept it from)
a disqualified person? ..............................
1a(2)
 
No
(3) Furnish goods, services, or facilities to (or accept them from) a disqualified person? ...........
1a(3)
 
No
(4) Pay compensation to, or pay or reimburse the expenses of, a disqualified person? ............
1a(4)
 
No
(5) Transfer any income or assets to a disqualified person (or make any of either available
for the benefit or use of a disqualified person)? ......................
1a(5)
 
No
(6) Agree to pay money or property to a government official? (Exception. Check "No"
if the foundation agreed to make a grant to or to employ the official for a period
after termination of government service, if terminating within 90 days.) ...............
1a(6)
 
No
b
If any answer is "Yes" to 1a(1)–(6), did any of the acts fail to qualify under the exceptions described in Regulations
section 53.4941(d)-3 or in a current notice regarding disaster assistance? See instructions ..........
1b
 
 
c
Organizations relying on a current notice regarding disaster assistance check here ........right arrow
d
Did the foundation engage in a prior year in any of the acts described in 1a, other than excepted acts,
that were not corrected before the first day of the tax year beginning in 2024? .............
1d
 
No
2
Taxes on failure to distribute income (section 4942) (does not apply for years the foundation was a private
operating foundation defined in section 4942(j)(3) or 4942(j)(5)):
a
At the end of tax year 2024, did the foundation have any undistributed income (Part XII, lines 6d
and 6e) for tax year(s) beginning before 2024?....................
2a
 
No
If "Yes," list the years right arrow20, 20, 20, 20
b
Are there any years listed in 2a for which the foundation is not applying the provisions of section 4942(a)(2)
(relating to incorrect valuation of assets) to the year’s undistributed income? (If applying section 4942(a)(2)
to all years listed, answer "No" and attach statement—see instructions.) ..............
2b
 
 
c
If the provisions of section 4942(a)(2) are being applied to any of the years listed in 2a, list the years here.
right arrow20, 20, 20, 20
3a
Did the foundation hold more than a 2% direct or indirect interest in any business enterprise at
any time during the year? ..............................
3a
 
No
b
If "Yes," did it have excess business holdings in 2024 as a result of (1) any purchase by the foundation
or disqualified persons after May 26, 1969; (2) the lapse of the 5-year period (or longer period approved
by the Commissioner under section 4943(c)(7)) to dispose of holdings acquired by gift or bequest; or (3)
the lapse of the 10-, 15-, or 20-year first phase holding period? (Use Schedule C, Form 4720, to determine
if the foundation had excess business holdings in 2024.) .....................
3b
 
 
4a
Did the foundation invest during the year any amount in a manner that would jeopardize its charitable purposes?
4a
 
No
b
Did the foundation make any investment in a prior year (but after December 31, 1969) that could jeopardize its
charitable purpose that had not been removed from jeopardy before the first day of the tax year beginning in 2024? ..
4b
 
No
Form 990-PF (2024)
Form 990-PF (2024)
Page 6
Part VI-B
Statements Regarding Activities for Which Form 4720 May Be Required (continued)
5a
During the year did the foundation pay or incur any amount to:
Yes
No
(1) Carry on propaganda, or otherwise attempt to influence legislation (section 4945(e))? ..........
5a(1)
 
No
(2) Influence the outcome of any specific public election (see section 4955); or to carry
on, directly or indirectly, any voter registration drive? ....................
5a(2)
 
No
(3) Provide a grant to an individual for travel, study, or other similar purposes? .............
5a(3)
 
No
(4) Provide a grant to an organization other than a charitable, etc., organization described
in section 4945(d)(4)(A)? See instructions ........................
5a(4)
 
No
(5) Provide for any purpose other than religious, charitable, scientific, literary, or
educational purposes, or for the prevention of cruelty to children or animals? .............
5a(5)
 
No
b
If any answer is "Yes" to 5a(1)–(5), did any of the transactions fail to qualify under the exceptions described in
Regulations section 53.4945 or in a current notice regarding disaster assistance? See instructions ........
5b
 
 
c
Organizations relying on a current notice regarding disaster assistance check .........right arrow
d
If the answer is "Yes" to question 5a(4), does the foundation claim exemption from the
tax because it maintained expenditure responsibility for the grant? .................
5d
 
 
If "Yes," attach the statement required by Regulations section 53.4945–5(d).
6a
Did the foundation, during the year, receive any funds, directly or indirectly, to pay premiums on
a personal benefit contract? .............................
6a
 
No
b
Did the foundation, during the year, pay premiums, directly or indirectly, on a personal benefit contract? ....
6b
 
No
If "Yes" to 6b, file Form 8870.
7a
At any time during the tax year, was the foundation a party to a prohibited tax shelter transaction?
7a
 
No
b
If "Yes", did the foundation receive any proceeds or have any net income attributable to the transaction? .....
7b
 
 
8
Is the foundation subject to the section 4960 tax on payment(s) of more than $1,000,000 in remuneration or
excess parachute payment during the year? .........................
8
 
No
Part VII
Information About Officers, Directors, Trustees, Foundation Managers, Highly Paid Employees,
and Contractors
1 List all officers, directors, trustees, foundation managers and their compensation. See instructions
(a) Name and address (b) Title, and average
hours per week
devoted to position 		(c) Compensation
 (If not paid, enter
-0-) 		(d) Contributions to employee benefit plans and deferred compensation (e) Expense account,
other allowances
RICHARD W TINBERG PRESIDENT
1.00 		0 0 0
159 SHERIDAN ROAD
WINNETKA,IL60093
ELAINE TINBERG DIRECTOR
1.00 		0 0 0
159 SHERIDAN ROAD
WINNETKA,IL60093
CHRISTINE TINBERG DIRECTOR
1.00 		0 0 0
159 SHERIDAN ROAD
WINNETKA,IL60093
RICHARD J TINBERG DIRECTOR
1.00 		0 0 0
159 SHERIDAN ROAD
WINNETKA,IL60093
2 Compensation of five highest-paid employees (other than those included on line 1—see instructions). If none, enter “NONE."
(a) Name and address of each employee paid more than $50,000 (b) Title, and average
hours per week
devoted to position 		(c) Compensation (d) Contributions to
employee benefit
plans and deferred
compensation 		(e) Expense account,
other allowances
NONE
Total number of other employees paid over $50,000...................right arrow 0
Form 990-PF (2024)
Form 990-PF (2024)
Page 7
Part VII
Information About Officers, Directors, Trustees, Foundation Managers, Highly Paid Employees,
and Contractors (continued)
3 Five highest-paid independent contractors for professional services (see instructions). If none, enter "NONE".
(a) Name and address of each person paid more than $50,000 (b) Type of service (c) Compensation
NONE
Total number of others receiving over $50,000 for professional services.............right arrow0
Part VIII-A
Summary of Direct Charitable Activities
List the foundation’s four largest direct charitable activities during the tax year. Include relevant statistical information such as the number of organizations and other beneficiaries served, conferences convened, research papers produced, etc. Expenses
1  
2  
3  
4  
Part VIII-B
Summary of Program-Related Investments (see instructions)
Describe the two largest program-related investments made by the foundation during the tax year on lines 1 and 2. Amount
1  
2  
All other program-related investments. See instructions.
3  
Total. Add lines 1 through 3.........................right arrow0
Form 990-PF (2024)
Form 990-PF (2024)
Page 8
Part IX
Minimum Investment Return (All domestic foundations must complete this part. Foreign foundations, see instructions.)
1
Fair market value of assets not used (or held for use) directly in carrying out charitable, etc.,
purposes:
a
Average monthly fair market value of securities...................
1a
5,074,727
b
Average of monthly cash balances.......................
1b
112,267
c
Fair market value of all other assets (see instructions)................
1c
0
d
Total (add lines 1a, b, and c).........................
1d
5,186,994
e
Reduction claimed for blockage or other factors reported on lines 1a and
1c (attach detailed explanation) .............
1e
0
2
Acquisition indebtedness applicable to line 1 assets..................
2
0
3
Subtract line 2 from line 1d.........................
3
5,186,994
4
Cash deemed held for charitable activities. Enter 1.5% (0.015) of line 3 (for greater amount, see
instructions) .............................
4
77,805
5
Net value of noncharitable-use assets. Subtract line 4 from line 3. ............
5
5,109,189
6
Minimum investment return. Enter 5% (0.05) of line 5................
6
255,459
Part X
Distributable Amount (see instructions) (Section 4942(j)(3) and (j)(5) private operating foundations and certain foreign organizations check here right arrow and do not complete this part.)
1
Minimum investment return from Part IX, line 6..................
1
255,459
2a
Tax on investment income for 2024 from Part V, line 5 .......
2a
3,809
b
Income tax for 2024. (This does not include the tax from Part V.) ...
2b
 
c
Add lines 2a and 2b............................
2c
3,809
3
Distributable amount before adjustments. Subtract line 2c from line 1............
3
251,650
4
Recoveries of amounts treated as qualifying distributions................
4
0
5
Add lines 3 and 4............................
5
251,650
6
Deduction from distributable amount (see instructions).................
6
0
7
Distributable amount as adjusted. Subtract line 6 from line 5. Enter here and on Part XII, line 1 ...
7
251,650
Part XI
Qualifying Distributions (see instructions)
1
Amounts paid (including administrative expenses) to accomplish charitable, etc., purposes:
a
Expenses, contributions, gifts, etc.—total from Part I, column (d), line 26 ..........
1a
758,025
b
Program-related investments—total from Part VIII-B..................
1b
0
2
Amounts paid to acquire assets used (or held for use) directly in carrying out charitable, etc.,
purposes...............................
2
 
3
Amounts set aside for specific charitable projects that satisfy the:
a
Suitability test (prior IRS approval required)....................
3a
 
b
Cash distribution test (attach the required schedule) .................
3b
 
4
Qualifying distributions. Add lines 1a through 3b. Enter here and on Part XII, line 4. .......
4
758,025
Form 990-PF (2024)
Form 990-PF (2024)
Page 9
Part XII
Undistributed Income (see instructions)
(a)
Corpus 		(b)
Years prior to 2023 		(c)
2023 		(d)
2024
1 Distributable amount for 2024 from Part X, line 7 251,650
2 Undistributed income, if any, as of the end of 2024:
a Enter amount for 2023 only....... 0
b Total for prior years:20 , 20, 20 0
3 Excess distributions carryover, if any, to 2024:
a From 2019...... 336,500
b From 2020...... 223,379
c From 2021...... 71,750
d From 2022...... 160,715
e From 2023...... 221,958
f Total of lines 3a through e ........ 1,014,302
4Qualifying distributions for 2024 from Part
XI, line 4: right arrow$ 758,025
a Applied to 2023, but not more than line 2a 0
b Applied to undistributed income of prior years
(Election required—see instructions)..... 		0
c Treated as distributions out of corpus (Election
required—see instructions)........ 		0
d Applied to 2024 distributable amount..... 251,650
e Remaining amount distributed out of corpus 506,375
5 Excess distributions carryover applied to 2024. 0 0
(If an amount appears in column (d), the
same amount must be shown in column (a).)
6Enter the net total of each column as
indicated below:
a Corpus. Add lines 3f, 4c, and 4e. Subtract line 5 1,520,677
b Prior years’ undistributed income. Subtract
line 4b from line 2b .......... 		0
c Enter the amount of prior years’ undistributed
income for which a notice of deficiency has
been issued, or on which the section 4942(a)
tax has been previously assessed...... 		0
d Subtract line 6c from line 6b. Taxable amount
—see instructions ........... 		0
e Undistributed income for 2023. Subtract line
4a from line 2a. Taxable amount—see
instructions ............. 		0
f Undistributed income for 2024. Subtract
lines 4d and 5 from line 1. This amount must
be distributed in 2025 .......... 		0
7 Amounts treated as distributions out of
corpus to satisfy requirements imposed by
section 170(b)(1)(F) or 4942(g)(3) (Election may
be required - see instructions) ....... 		0
8 Excess distributions carryover from 2019 not
applied on line 5 or line 7 (see instructions) ... 		336,500
9 Excess distributions carryover to 2025.
Subtract lines 7 and 8 from line 6a ...... 		1,184,177
10 Analysis of line 9:
a Excess from 2020.... 223,379
b Excess from 2021.... 71,750
c Excess from 2022.... 160,715
d Excess from 2023.... 221,958
e Excess from 2024.... 506,375
Form 990-PF (2024)
Form 990-PF (2024)
Page 10
Part XIII
Private Operating Foundations (see instructions and Part VI-A, question 9)
1a If the foundation has received a ruling or determination letter that it is a private operating
foundation, and the ruling is effective for 2024, enter the date of the ruling ...... right arrow
 
b Check box to indicate whether the organization is a private operating foundation described in section or
2a Enter the lesser of the adjusted net
income from Part I or the minimum
investment return from Part IX for each
year listed .......... 		Tax year Prior 3 years (e) Total
(a) 2024 (b) 2023 (c) 2022 (d) 2021
         
b 85% (0.85) of line 2a .........          
c Qualifying distributions from Part XI,
line 4 for each year listed ..... 		         
d Amounts included in line 2c not used directly
for active conduct of exempt activities .......... 		         
e Qualifying distributions made directly
for active conduct of exempt activities.
Subtract line 2d from line 2c .... 		         
3 Complete 3a, b, or c for the
alternative test relied upon:
a “Assets" alternative test—enter:
(1) Value of all assets ......          
(2) Value of assets qualifying
under section 4942(j)(3)(B)(i)		          
b “Endowment" alternative test— enter 2/3
of minimum investment return shown in
Part IX, line 6 for each year listed .. 		         
c “Support" alternative test—enter:
(1) Total support other than gross
investment income (interest,
dividends, rents, payments
on securities loans (section
512(a)(5)), or royalties) .... 		         
(2) Support from general public
and 5 or more exempt
organizations as provided in
section 4942(j)(3)(B)(iii).... 		         
(3) Largest amount of support
from an exempt organization		          
(4) Gross investment income          
Part XIV
Supplementary Information (Complete this part only if the foundation had $5,000 or more in
assets at any time during the year—see instructions.)
1Information Regarding Foundation Managers:
aList any managers of the foundation who have contributed more than 2% of the total contributions received by the foundation
before the close of any tax year (but only if they have contributed more than $5,000). (See section 507(d)(2).)
RICHARD W TINBERG
ELAINE TINBERG
bList any managers of the foundation who own 10% or more of the stock of a corporation (or an equally large portion of the
ownership of a partnership or other entity) of which the foundation has a 10% or greater interest.
2Information Regarding Contribution, Grant, Gift, Loan, Scholarship, etc., Programs:
Check here right arrow if the foundation only makes contributions to preselected charitable organizations and does not accept
unsolicited requests for funds. If the foundation makes gifts, grants, etc. to individuals or organizations under
other conditions, complete items 2a, b, c, and d. See instructions
aThe name, address, and telephone number or e-mail address of the person to whom applications should be addressed:
RICHARD ELAINE TINBERG
159 SHERIDAN ROAD
WINNETKA,IL60093
(847) 441-9152
bThe form in which applications should be submitted and information and materials they should include:
LETTER DESCRIBING PROPOSED USE OF FUNDS
cAny submission deadlines:
NONE
dAny restrictions or limitations on awards, such as by geographical areas, charitable fields, kinds of institutions, or other
factors:
NONE
Form 990-PF (2024)
Form 990-PF (2024)
Page 11
Part XIV
Supplementary Information (continued)
3 Grants and Contributions Paid During the Year or Approved for Future Payment
Recipient If recipient is an individual,
show any relationship to
any foundation manager
or substantial contributor
 Foundation
status of
recipient 		Purpose of grant or
contribution 		Amount
Name and address (home or business)
aPaid during the year

AFRICAN LEADERSHIP FOUNDATION

PO BOX 7408
NEW YORK,NY10016 		  PC PROGRAM SUPPORT 2,500

ALLIANCE FOR THE GREAT LAKES

150 N MICHIGAN AVE
CHICAGO,IL60601 		  PC PROGRAM SUPPORT 500

CHICAGO BOTANIC GARDENS

1000 LAKE COOK RD
GLENCOE,IL60022 		  PC PROGRAM SUPPORT 20,000

CHICAGO PUBLIC MEDIA

800 EAST GRAND NAVY PIER
CHICAGO,IL60611 		  PC PROGRAM SUPPORT 50,000

COLORADO PUBLIC RADIO

7409 S ALTON CT
CENTENNIAL,CO80112 		  PC PROGRAM SUPPORT 1,000

COLORADO STATE UNIVERSITY FOUNDATION

UNIVERSITY SERVICES CENTER 300
FORT COLLINS,CO80523 		  PC PROGRAM SUPPORT 100,000

COURT THEATRE

5535 S ELLIS
CHICAGO,IL60637 		  PC PROGRAM SUPPORT 10,000

DOCTORS WITHOUT BORDERS

40 RECTOR STREET 16TH FLOOR
NEW YORK,NY10006 		  PC PROGRAM SUPPORT 10,000

EAGLE VALLEY COMMUNITY FOUNDATION

56 EDWARDS VILLAGE BLVD SUITE 219
EDWARDS,CO81632 		  PC PROGRAM SUPPORT 2,500

ERIKA'S LIGHTHOUSE

897 1/2 GREEN BAY ROAD
WINNETKA,IL60093 		  PC PROGRAM SUPPORT 25,000

GREATER CHICAGO FOOD DEPOSITORY

4100 W ANN LURIE PL
CHICAGO,IL60632 		  PC PROGRAM SUPPORT 1,000

INDIAN HILL CLUB SCHOLARSHIP FOUNDATION

1 INDIAN HILL ROAD
WINNETKA,IL60093 		  PC PROGRAM SUPPORT 500

INGENUITY

440 NORTH WELLS SUITE 505
CHICAGO,IL60654 		  PC PROGRAM SUPPORT 45,000

NORTH SHORE ART LEAGUE

620 LINCOLN AVE
WINNETKA,IL60093 		  PC PROGRAM SUPPORT 7,500

NORTHWESTERN UNIVERSITY

633 CLARK ST
EVANSTON,IL60208 		  PC PROGRAM SUPPORT 60,000

STEPPENWOLF THEATRE

1650 NORTH HALSTED
CHICAGO,IL60614 		  PC PROGRAM SUPPORT 10,000

THE GOODMAN THEATRE

170 N DEARBORN ST
CHICAGO,IL60601 		  PC PROGRAM SUPPORT 10,000

THE NATURE CONSERVANCY

4245 N FAIRFAX DR STE 100
ARLINGTON,VA22203 		  PC PROGRAM SUPPORT 1,000

THE VOLUNTEER CENTER

520 GLENDALE AVE
WINNETKA,IL60093 		  PC PROGRAM SUPPORT 500

UC REGENTS

220 MONTGOMERY ST FL 5
SAN FRANCISCO,CA94104 		  PC PROGRAM SUPPORT 15,000

UNIVERSITY OF CHICAGO

5801 S ELLIS AVE
CHICAGO,IL60637 		  PC PROGRAM SUPPORT 60,000

WINNETKA COMMUNITY HOUSE

620 LINCOLN AVE
WINNETKA,IL60093 		  PC PROGRAM SUPPORT 500

WRITER'S THEATRE

319/321 PARK AVE
GLENCOE,IL60022 		  PC PROGRAM SUPPORT 323,000

WTTW

5400 N SAINT LOUIS AVE
CHICAGO,IL60614 		  PC PROGRAM SUPPORT 2,500
Total .................................right arrow 3a 758,000
bApproved for future payment
Total ................................. right arrow 3b 0
Form 990-PF (2024)
Form 990-PF (2024)
Page 12
Part XV-A
Analysis of Income-Producing Activities
Enter gross amounts unless otherwise indicated. Unrelated business income Excluded by section 512, 513, or 514 (e)
Related or exempt
function income
(See instructions.)
1Program service revenue: (a)
Business code 		(b)
Amount 		(c)
Exclusion code 		(d)
Amount
a
b
c
d
e
f
gFees and contracts from government agencies          
2 Membership dues and assessments ....          
3 Interest on savings and temporary cash
investments ........... 		    14 4,682  
4 Dividends and interest from securities ....     14 54,253  
5 Net rental income or (loss) from real estate:
aDebt-financed property......          
bNot debt-financed property.....          
6 Net rental income or (loss) from personal property          
7 Other investment income .....          
8 Gain or (loss) from sales of assets other than
inventory ............ 		    18 237,672  
9 Net income or (loss) from special events:          
10 Gross profit or (loss) from sales of inventory          
11 Other revenue:
a
b
c
d
e
12 Subtotal. Add columns (b), (d), and (e) .. 0 296,607 0
13Total. Add line 12, columns (b), (d), and (e)..................
13
296,607
(See worksheet in line 13 instructions to verify calculations.)
Part XV-B
Relationship of Activities to the Accomplishment of Exempt Purposes
Line No.
DownArrow 		Explain below how each activity for which income is reported in column (e) of Part XV-A contributed importantly to
the accomplishment of the foundation’s exempt purposes (other than by providing funds for such purposes). (See
instructions.)
Form 990-PF (2024)
Form 990-PF (2024)
Page 13
Part XVI
Information Regarding Transfers To and Transactions and Relationships With Noncharitable Exempt Organizations
1
Did the organization directly or indirectly engage in any of the following with any other organization described in section 501(c) (other than section 501(c)(3) organizations) or in section 527, relating to political organizations?
Yes
No
a
Transfers from the reporting foundation to a noncharitable exempt organization of:
(1) Cash...................................
1a(1)
 
No
(2) Other assets.................................
1a(2)
 
No
b
Other transactions:
(1) Sales of assets to a noncharitable exempt organization....................
1b(1)
 
No
(2) Purchases of assets from a noncharitable exempt organization..................
1b(2)
 
No
(3) Rental of facilities, equipment, or other assets.......................
1b(3)
 
No
(4) Reimbursement arrangements...........................
1b(4)
 
No
(5) Loans or loan guarantees.............................
1b(5)
 
No
(6) Performance of services or membership or fundraising solicitations................
1b(6)
 
No
c
Sharing of facilities, equipment, mailing lists, other assets, or paid employees..............
1c
 
No
d
If the answer to any of the above is "Yes," complete the following schedule. Column (b) should always show the fair market value
of the goods, other assets, or services given by the reporting foundation. If the foundation received less than fair market value
in any transaction or sharing arrangement, show in column (d) the value of the goods, other assets, or services received.
(a) Line No. (b) Amount involved (c) Name of noncharitable exempt organization (d) Description of transfers, transactions, and sharing arrangements
2a
Is the foundation directly or indirectly affiliated with, or related to, one or more tax-exempt organizations
described in section 501(c) (other than section 501(c)(3)) or in section 527? ...........
b
If "Yes," complete the following schedule.

(a) Name of organization (b) Type of organization (c) Description of relationship
Sign Here
Under penalties of perjury, I declare that I have examined this return, including accompanying schedules and statements, and to the best of my knowledge and belief, it is true, correct, and complete. Declaration of preparer (other than taxpayer) is based on all information of which preparer has any knowledge.
right arrow right arrow
May the IRS discuss this return
with the preparer shown below?
See instructions.
Signature of officer or trustee Date Title
Paid Preparer Use Only Print/Type preparer's name Preparer's Signature Date Check if self-
employed right arrow		 PTIN
Firm's name Right Arrow
 Firm's EIN Right Arrow
Firm's address Right Arrow


 Phone no.
Form 990-PF (2024)
Additional Data


Software ID:  
Software Version:  


Form 990PF - Special Condition Description:
Special Condition Description

TY 2024 InvestmentsCorpBondsSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Name of Bond End of Year Book Value End of Year Fair Market Value
ABBOTT LABORATORIES 1.4% 6/30/30 16,822 16,903
AIR LEASE CORP 1.875% 8/15/26 13,010 12,391
AMAZON.COM 1.5% 6/3/30 6,722 6,787
AMERICAN TOWER CORP 3.95% 03/15/2029 USD SR LIEN 8,782 8,625
AMGEN INC 1.65% 8/15/28 3,541 3,576
AMGEN INC 3.2% 11/2/27 5,218 4,809
APPLE INC. 2.2% 9/11/29 12,529 12,572
B.A.T. CAPITAL CORPORATION 3.557% 8/15/27 4,134 3,870
BANK OF NY MELLON CORP MTN 1.05% 10/15/2026 USD SR 15,349 15,049
BOEING CO 3.1% 5/1/26 USD SR LIEN 5,090 4,874
BROADCOM INC 4.11% 9/15/28 8,456 7,817
CANADIAN PACIFIC RAILWAY 2.05% 3/5/30 5,969 6,082
CAPITAL ONE FINANCIAL CORPORA HYBRID 05/10/2028 USD 12,776 12,957
CITIGROUP INC 4.125% 7/25/28 3,170 2,917
CITIGROUP INC 4.45% 9/29/27 10,654 9,866
COCA-COLA COMPANY 1.375% 6/1/27 15,087 14,003
COSTCO WHOLESALE CORP 1.375% 6/20/27 14,966 13,945
CROWN CASTLE INTL CORP 1.05% 5/1/26 9,969 9,448
CSX CORPORATION 2.6% 11/1/26 10,231 9,667
CVS HEALTH CORP 4.3% 3/25/28 USD 3,232 2,906
DISCOVER FINANCIAL 4.1% 2/9/27 USD SR LIEN 6,261 5,892
DTE ELECTRIC CO 2.25% 3/1/30 9,581 9,698
EMERSON ELECTRIC CO. 2.0% 12/21/2028 USD SR LIEN NEXT 15,146 14,445
ENERGY TRANSFER PRTNRS 4.95% 6/15/28 USD 5,188 4,992
EXXON MOBIL CORPORATION 2.44% 8/16/29 16,410 16,427
FOX CORPORATION 4.709% 01/25/2029 USD SER WI SR LIEN 9,023 8,896
GATX CORP 4.7% 04/01/2029 USD SR LIEN NEXT CALL DT. 01 01 11,767 11,838
HONEYWELL INTERNATIONAL 2.7% 8/15/29 2,733 2,749
HONEYWELL INTERNATIONAL INC 2.5% 11/1/26 12,285 11,583
HORMEL FOODS CORP 1.7% 6/3/28 19,627 18,123
HP ENTERPRISE 1.75% 4/1/26 SR LIEN 6,012 5,779
INTUIT INC 1.35% 7/15/27 10,027 9,226
JPMORGAN CHASE HYBRID 2/1/28 USD 18,011 17,620
KIMCO REALTY CORP 3.8% 4/1/27 USD SR LIEN 10,408 9,795
KINDER MORGAN INC 4.3% 3/1/28 8,147 7,850
MERCK & CO., INC. 1.9% 12/10/2028 USD SR LIEN NEXT CALL 11,328 10,825
MORGAN STANLEY HYBRID MTN 07/20/2027 USD SR LIEN 15,347 16,159
NEXTERA ENERGY CAPITAL 1.9% 6/15/28 23,688 22,646
NVIDIA CORP 1.55% 6/15/28 10,004 9,080
NXP BV/NXP FDG/NXP USA 4.3% 06/18/2029 USD SR LIEN 6,709 6,796
NXP BV/NXP FUNDING LLC 5.55% 12/01/2028 USD SR LIEN 4,046 4,069
PEPSICO, INC. 2.625% 07/29/2029 USD SR LIEN NEXT CALL DT. 16,663 16,504
PHILIP MORRIS INTL INC 0.875% 05/01/2026 USD SR LIEN 13,467 13,321
PRAXAIR INC 1.1% 8/10/30 13,053 13,237
PUBLIC STORAGE 0.875% 2/15/26 USD 4,991 4,798
QUALCOMM INC 1.3% 5/20/28 9,920 8,974
REALTY INCOME CORP 3.4% 1/15/28 15,614 14,392
ROPER TECHNOLOGIES INC 4.2% 9/15/28 9,110 8,785
ROYAL BANK OF CANADA MTN 1.15% 07/14/2026 USD SR 15,405 15,196
SALESFORCE.COM 1.5% 7/15/28 10,012 8,985
SHELL INTERNATIONAL FINANCE B. 2.375% 11/7/29 4,198 4,484
SOUTHWESTERN ELEC 4.1% 9/15/28 USD 5,406 4,852
STATE STREET CORPORATION 2.4% 1/24/30 5,329 5,373
SYNCHRONY FINANCIAL 3.95% 12/01/2027 USD SR LIEN NEXT 3,777 3,867
TEXAS INSTRUMENTS INC 2.9% 11/3/27 5,215 4,792
TORONTO-DOMINION BANK (THE) MTN 1.2% 06/03/2026 USD 15,457 15,244
TRANSCANADA PIPELINES LIMITED 4.25% 5/15/28 11,299 10,738
TRUIST FINANCIAL CORP 1.125% 8/3/27 14,898 13,664
U.S. BANCORP MTN 3.0% 07/30/2029 USD SUB LIEN NEXT CALL 15,265 14,663
WALT DISNEY COMPANY 2.0% 9/1/29 14,888 15,122
WELLS FARGO MTN 3.55% 09/29/2025 USD SR 9,969 9,921
ALPHABET INC 1.1% 08/15/2030 USD SR LIEN 4,085 4,163
AON CORP 2.8% 05/15/2030 USD SR LIEN 7,185 7,127
AUTONATION INC 4.75% 6/1/2030 USD SR LIEN 5,839 5,792
BANK OF AMERICA HYBRID MTN 7/23/2030 3.194% 3,702 3,687
BANK OF AMERICA HYBRID MTN 2/13/2031 2.496% 8,854 8,792
BANK OF AMERICA HYBRID MTN 6/14/2029 2.087% 4,542 4,537
BANK OF MONTREAL HYBRID 9/10/2030 4.64% 14,817 14,712
BUNGE LIMITED FINANCE CORP 2.75% 05/14/2031 USD SR LIEN 4,422 4,325
CHUBB INA HOLDINGS INC 1.375% 09/15/2030 USD SR LIEN 12,220 12,459
CIGNA CORP 2.375% 03/15/2031 USD SR LIEN 11,124 11,010
CITIGROUP INC HYBRID 01/29/2031 2.666% 5,333 5,308
DOW CHEMICAL COMPANY 2.1% 11/15/2030 USD SR LIEN 11,114 11,038
ENBRIDGE INC 5.3% 4/5/2029 USD SR LIEN 9,121 9,093
ENTERGY CORPORATION 2.8% 6/15/2030 USD SR LIEN 11,639 11,580
EVERSOURCE ENERGY 1.65% 8/15/2030 USE SER R SR LIEN 4,917 4,994
GENERAL MOTORS FINL CO 5.6% 06/18/2031 USD SR LIEN 8,073 8,039
HOME DEPOT INC 1.375% 03/15/2031 USD SR LIEN 9,903 9,720
JM SMUCKER CO 3.375% 9/1/2030 USD SR LIEN 8,685 8,717
JOHNSON & JOHNSON 1.3% 9/1/2030 USD SR LIEN 16,466 16,773
ONEOK INC 3.4% 9/1/29 USD SR LIEN 8,397 8,368
PFIZER INC 1.75% 08/18/2031 13,430 13,180
PHILIP MORRIS INTL INC 5.125% 02/13/2031 USD SR LIEN 9,004 9,006
PNC FINANCIAL SERVICES HYBRID 06/12/2029 5.582% USD SR LIEN 8,176 8,139
PROCTOR & GAMBLE CO 1.2% 10/29/2030 USD SR LIEN 5,027 4,956
PROLOGIS, L.P. 1.25% 10/15/2030 USD LIEN 16,343 16,391
ROYALTY PHARMACY PLC 2.2% 09/02/2030 USD SER WI SR LIEN 6,823 6,797
S&P GLOBAL INC 1.25% 08/15/2030 USD SR LIEN 10,529 10,760
THERMO FISHER SCIENTIFIC 2.0% 10/15/2031 USD SR LIEN 8,499 8,323
VERIZON COMMUNICATIONS INC 1.75% 01/20/2031 USD SR LIEN 9,228 9,067
VISA INC 1.1% 02/15/2031 USD SR LIEN 17,108 16,999
WASTE MANAGEMENT INC 1.5% 03/15/2031 USD SR LIEN 13,320 13,026

TY 2024 InvestmentsCorpStockSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Name of Stock End of Year Book Value End of Year Fair Market Value
BERKSHIRE HATHAWAY INC CL-A (DEL) CLASS A 153,544 1,361,840
GS CORE FIXED INCOME FUND 142,293 128,201
GS FUTURE TECH LEADERS EQUITY ETF 383,694 495,963
ISHARES CURRENCY HEDGED MSCI EAFE ETF 80,338 91,149
ISHARES EXPANDED TECH SECTOR ETF 495,680 786,093
ISHARES RUSSELL 1000 GROWTH ETF 174,612 420,856
ISHARES RUSSELL 1000 VALUE ETF 411,809 592,416
ISHARES RUSSELL 2000 GROWTH ETF 47,653 63,033
SPDR DJ WILSHIRE GLOBAL REAL ESTATE ETF 138,291 128,713

TY 2024 OtherDecreasesSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Description Amount
BASIS ADJUSTMENT 181,119


TY 2024 OtherExpensesSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Description Revenue and Expenses per Books Net Investment Income Adjusted Net Income Disbursements for Charitable Purposes
FILING FEES 25 0   25


TY 2024 OtherLiabilitiesSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Description Beginning of Year - Book Value End of Year - Book Value
GOLDMAN SACHS - OPEN PUT OPTIONS 1,737 5,127


TY 2024 OtherProfessionalFeesSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Category Amount Net Investment Income Adjusted Net Income Disbursements for Charitable Purposes
INVESTMENT ADVISORY FEES 22,556 22,556   0


TY 2024 TaxesSchedule
Name:
TINBERG FOUNDATION
EIN:
36-3742179
Category Amount Net Investment Income Adjusted Net Income Disbursements for Charitable Purposes
FEDERAL TAXES 7,459 0   0