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Monopar Therapeutics director sells 8,400 shares

The reported transactions were made under a Rule 10b5-1 Plan executed on May 28, 2026.

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Form Type
4

Rhea-AI Filing Summary

Monopar Therapeutics (MNPR) director Christopher M. Starr exercised stock options for 8,400 common shares at $0.005 per share on October 1, 2026, and sold 8,400 shares in three transactions: 4,631 at a weighted average price of $78.09, 2,970 at $78.82, and 799 at $79.67. The respective sale prices ranged from $77.50 to $78.49, $78.50 to $79.49, and $79.50 to $80.01, inclusive. The transactions were effected pursuant to a Rule 10b5-1 Plan executed May 28, 2026. The reported positions following the transactions include 8,400 stock options and 9,880 common shares held by the Christopher M. Starr and Sheri L. Starr Revocable Trust, for which Starr serves as trustee.

Insider STARR CHRISTOPHER M
Role Director
Sold 8,400 shs ($659K)
Approx. gross sale proceeds $659K
Approx. exercise cost $42.00
Approx. pre-tax spread $659K
Type Security Shares Price Value
Exercise Stock Option F1, F2 8,400 $0.00 $0.00
Exercise Common Stock F1 8,400 $0.005 $42.00
Sale Common Stock F1, F4 4,631 $78.09 $362K
Sale Common Stock F1, F5 2,970 $78.82 $234K
Sale Common Stock F1, F6 799 $79.67 $64K
holding Common Stock F3 -- -- --
Holdings After Transaction: Stock Option — 8,400 contracts (Direct); Common Stock — 5,173 shares (Direct); Common Stock — 9,880 shares (Indirect, See Footnote)
Footnotes (6)
  1. F1. This transaction was effected pursuant to a Rule 10b5-1 Plan executed by the reporting person on May 28, 2026.
  2. F2. On February 20, 2017, the reporting person was granted stock options to purchase up to 16,800 shares of common stock. Stock options vest 6/48ths on the six-month anniversary of grant date and 1/48th per month thereafter.
  3. F3. Represents shares of common stock held by the Christopher M. Starr and Sheri L. Starr Revocable Trust over which Dr. Starr serves as Trustee.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.49, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.50 to $79.49, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.50 to $80.01, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
Shares acquired through option exercise 8,400 shares October 1, 2026
Exercise price $0.005 per share Stock options exercised October 1, 2026
First sale transaction 4,631 shares at a weighted average price of $78.09 per share Prices ranged from $77.50 to $78.49, inclusive; October 1, 2026
Second sale transaction 2,970 shares at a weighted average price of $78.82 per share Prices ranged from $78.50 to $79.49, inclusive; October 1, 2026
Third sale transaction 799 shares at a weighted average price of $79.67 per share Prices ranged from $79.50 to $80.01, inclusive; October 1, 2026
Stock options following transaction 8,400 options Exercise price $0.005 per share; expiration February 19, 2027
Revocable Trust common shares 9,880 shares Held by the Christopher M. Starr and Sheri L. Starr Revocable Trust
Rule 10b5-1 Plan regulatory
"effected pursuant to a Rule 10b5-1 Plan"
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
stock options financial
"the reporting person was granted stock options to purchase"
Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MNPR shares did director Christopher M. Starr sell, and at what prices?

Christopher M. Starr sold 8,400 MNPR shares on October 1, 2026, across three reported transactions: 4,631 shares at a weighted average price of $78.09, 2,970 at $78.82, and 799 at $79.67. The respective price ranges were $77.50 to $78.49, $78.50 to $79.49, and $79.50 to $80.01, inclusive. The transactions were effected pursuant to a Rule 10b5-1 Plan executed May 28, 2026.

How many MNPR stock options did Christopher M. Starr report after the exercise?

The reported position following the transaction was 8,400 stock options, with an exercise price of $0.005 per share and an expiration date of February 19, 2027.

How many MNPR shares are held by the Christopher M. Starr and Sheri L. Starr Revocable Trust?

The trust held 9,880 common shares. Christopher M. Starr serves as trustee.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Learn about SEC filing dates
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).
X
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*
STARR CHRISTOPHER M

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026
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 Stock10/01/2026M(1)8,400A$0.00513,573D
Common Stock10/01/2026S(1)4,631D$78.09(4)8,942D
Common Stock10/01/2026S(1)2,970D$78.82(5)5,972D
Common Stock10/01/2026S(1)799D$79.67(6)5,173D
Common Stock9,880ISee Footnote(3)
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
Stock Option$0.00510/01/2026M(1)8,400 (2)02/19/2027Common Stock8,400$08,400D
Explanation of Responses:
1. This transaction was effected pursuant to a Rule 10b5-1 Plan executed by the reporting person on May 28, 2026.
2. On February 20, 2017, the reporting person was granted stock options to purchase up to 16,800 shares of common stock. Stock options vest 6/48ths on the six-month anniversary of grant date and 1/48th per month thereafter.
3. Represents shares of common stock held by the Christopher M. Starr and Sheri L. Starr Revocable Trust over which Dr. Starr serves as Trustee.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.49, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.50 to $79.49, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.50 to $80.01, inclusive. The reporting person undertakes to provide to Monopar Therapeutics Inc., any security holder of Monopar Therapeutics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (4) through (6) to this Form 4.
/s/ Quan Vu, Attorney-in-fact10/05/2026
** 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)

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