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Monopar Therapeutics (MNPR) COO gains shares through RSU vesting and tax withholding

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Monopar Therapeutics Chief Operating Officer Andrew Cittadine increased his direct equity stake through RSU vesting. On March 31, 2026, 3,514 restricted stock units vested and were settled into an equal number of common shares at a conversion price of $0.00 per share.

To cover withholding taxes on this vesting, 1,571 common shares were withheld by the company at a value of $54.79 per share, rather than sold in the open market. After these transactions, Cittadine directly owned 52,669 shares of Monopar Therapeutics common stock.

Positive

  • None.

Negative

  • None.
Insider Cittadine Andrew
Role Chief Operating Officer
Type Security Shares Price Value
Exercise Restricted Stock Unit 3,514 $0.00 --
Exercise Common Stock 3,514 $0.00 --
Tax Withholding Common Stock 1,571 $54.79 $86K
Holdings After Transaction: Restricted Stock Unit — 44,753 shares (Direct); Common Stock — 54,240 shares (Direct)
Footnotes (1)
  1. Represents shares acquired on vesting and settlement of restricted stock units. Represents shares withheld by the issuer to pay for the applicable withholding tax due upon vesting of restricted stock units. On February 1, 2023, the reporting person was granted 15,647 restricted stock units, vesting 6/48ths (1,956 shares) on June 30, 2023, and 3/48ths (978 shares) every 3 months thereafter until the RSU is fully vested on December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. Disposed of restricted stock units were surrendered in exchange for issuance of common stock upon vesting and settlement. On March 4, 2025, the reporting person was granted 40,581 restricted stock units, vesting 6/48ths (5,073 shares) on June 30, 2025, and 3/48ths (2,536 shares) every 3 months thereafter until the RSU is fully vested on December 31, 2028. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. Disposed of restricted stock units were surrendered in exchange for issuance of common stock upon vesting and settlement.
RSU shares vested 3,514 shares Restricted stock units settled into common stock on March 31, 2026
Tax withholding shares 1,571 shares Common shares withheld at $54.79 per share for taxes
Holdings after transactions 52,669 shares Common stock directly owned after March 31, 2026 transactions
2023 RSU grant 15,647 units RSUs granted February 1, 2023, vesting through December 31, 2026
2025 RSU grant 40,581 units RSUs granted March 4, 2025, vesting through December 31, 2028
Withholding price $54.79 per share Value used for shares withheld to cover tax obligations
Restricted Stock Unit financial
"Represents shares acquired on vesting and settlement of restricted stock units."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
vesting financial
"RSUs vest 6/48ths (1,956 shares) on June 30, 2023, and 3/48ths every 3 months thereafter"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
withholding tax financial
"shares withheld by the issuer to pay for the applicable withholding tax due upon vesting"
Withholding tax is a government-required portion of a payment—such as dividends, interest, or salary—that the payer keeps back and sends directly to tax authorities before the recipient receives the money. For investors it reduces the cash they actually get and changes the after-tax return on an investment; rates and refund or credit rules vary by country and can materially affect comparisons between similar investments, like a cashier holding part of a bill to cover taxes.
contingent right financial
"Each restricted stock unit represents a contingent right to receive one share of common stock"
tax-withholding disposition financial
"Payment of exercise price or tax liability by delivering securities"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Cittadine Andrew

(Last)(First)(Middle)
1000 SKOKIE BLVD SUITE 350

(Street)
WILMETTE ILLINOIS 60091

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Monopar Therapeutics [ MNPR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Operating Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock03/31/2026M3,514A(1)54,240D
Common Stock03/31/2026F1,571(2)D$54.7952,669D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit(1)03/31/2026M3,514 (3)(4) (3)(4)Common Stock3,514$044,753D
Explanation of Responses:
1. Represents shares acquired on vesting and settlement of restricted stock units.
2. Represents shares withheld by the issuer to pay for the applicable withholding tax due upon vesting of restricted stock units.
3. On February 1, 2023, the reporting person was granted 15,647 restricted stock units, vesting 6/48ths (1,956 shares) on June 30, 2023, and 3/48ths (978 shares) every 3 months thereafter until the RSU is fully vested on December 31, 2026. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. Disposed of restricted stock units were surrendered in exchange for issuance of common stock upon vesting and settlement.
4. On March 4, 2025, the reporting person was granted 40,581 restricted stock units, vesting 6/48ths (5,073 shares) on June 30, 2025, and 3/48ths (2,536 shares) every 3 months thereafter until the RSU is fully vested on December 31, 2028. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer. Disposed of restricted stock units were surrendered in exchange for issuance of common stock upon vesting and settlement.
/s/ Quan Vu, Attorney-in-fact04/02/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Monopar Therapeutics (MNPR) report for Andrew Cittadine?

Monopar Therapeutics reported that COO Andrew Cittadine had 3,514 restricted stock units vest into common shares. This RSU settlement increased his direct equity holdings and reflects routine, compensation-related share delivery rather than an open-market purchase or sale.

How many Monopar Therapeutics (MNPR) shares does Andrew Cittadine hold after this Form 4?

After the March 31, 2026 transactions, COO Andrew Cittadine directly owned 52,669 shares of Monopar Therapeutics common stock. This figure reflects RSU vesting and tax withholding share transfers reported in the Form 4 filing for that date.

Were any of Andrew Cittadine’s Monopar Therapeutics (MNPR) shares sold in the market?

No open-market sale was reported. Instead, 1,571 common shares were withheld by Monopar Therapeutics at $54.79 per share to satisfy applicable tax withholding obligations arising from restricted stock unit vesting on March 31, 2026.

What restricted stock unit grants does Andrew Cittadine have at Monopar Therapeutics (MNPR)?

Footnotes state Andrew Cittadine received 15,647 RSUs on February 1, 2023 and 40,581 RSUs on March 4, 2025. Both awards vest in quarterly installments through December 31, 2026 and December 31, 2028, respectively, with each RSU delivering one common share upon vesting.

Why were Monopar Therapeutics (MNPR) shares withheld from Andrew Cittadine in this Form 4?

The filing explains that 1,571 shares of common stock were withheld by Monopar Therapeutics to pay the applicable withholding tax due upon the vesting and settlement of restricted stock units, a common mechanism for handling tax obligations on equity compensation.