STOCK TITAN

Eton Pharmaceuticals (NASDAQ: ETON) insider sells 50K shares

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Eton Pharmaceuticals, Inc. (ETON) director Paul V. Maier exercised employee stock options for 50,000 shares of common stock at an exercise price of $3.78 per share and concurrently sold 50,000 shares of common stock on 2026-08-28 in multiple open-market transactions at weighted-average prices between about $58.50 and $61.98 per share. Following the option exercise, the reported option position was reduced to zero.

Positive

  • None.

Negative

  • None.
Insider MAIER PAUL V
Role Director
Sold 50,000 shs ($2.95M)
Approx. gross sale proceeds $2.95M
Approx. exercise cost $189K
Approx. pre-tax spread $2.76M
Type Security Shares Price Value
Exercise Employee Stock Option F3 50,000 $0.00 $0.00
Exercise Common Stock 50,000 $3.78 $189K
Sale Common Stock F1, F2 36,387 $58.64 $2.13M
Sale Common Stock F1, F4 13,485 $60.21 $812K
Sale Common Stock F1, F5 128 $61.77 $8K
Holdings After Transaction: Employee Stock Option — 0 shares (Direct); Common Stock — 59,745 shares (Direct)
Footnotes (5)
  1. F1. The Reporting Person will provide upon request by the Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price.
  2. F2. The shares were sold in multiple trades at prices ranging from $58.50 to $58.97. The price reported above reflects the weighted average sales price.
  3. F3. The shares subject to the option vested in 48 equal monthly installments from the date of grant (2-07-2022) until fully vested.
  4. F4. The shares were sold in multiple trades at prices ranging from $60.00 to $61.00. The price reported above reflects the weighted average sales price.
  5. F5. The shares were sold in multiple trades at prices ranging from $61.10 to $61.98. The price reported above reflects the weighted average sales price.
Options exercised 50,000 shares of Employee Stock Option Exercised into common stock on 2026-08-28
Option exercise price $3.78 per share Employee Stock Option for 50,000 shares
Common shares acquired via exercise 50,000 shares of Common Stock Received upon option exercise on 2026-08-28
Common shares sold (block 1) 36,387 shares at $58.64 per share Weighted average price; trades from $58.50 to $58.97
Common shares sold (block 2) 13,485 shares at $60.21 per share Weighted average price; trades from $60.00 to $61.00
Common shares sold (block 3) 128 shares at $61.77 per share Weighted average price; trades from $61.10 to $61.98
Net shares sold 50,000 shares Net of option exercise and sales, per transaction summary
Option vesting schedule 48 equal monthly installments From grant date 2022-02-07 until fully vested
Employee Stock Option financial
"security_title": "Employee Stock Option""
An employee stock option is a promise that lets a worker buy company shares later at a predetermined price, often after they stay for a certain period or meet performance goals — think of it like a coupon that locks in today's price for a future purchase. It matters to investors because options align employees’ incentives with company performance, can increase the number of shares outstanding (dilution) when exercised, and represent a compensation cost that affects reported profits and shareholder value.
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
weighted average sales price financial
"The price reported above reflects the weighted average sales price."
open market or private transaction financial
"transaction_code_description": "Sale in open market or private transaction""

FAQ

What insider transactions did ETON director Paul V. Maier report on this Form 4?

Paul V. Maier exercised 50,000 employee stock options at $3.78 per share into common stock and then sold 50,000 common shares on 2026-08-28 in several open-market trades at weighted-average prices between about $58.50 and $61.98 per share.

How many ETON options did Paul V. Maier exercise and at what price?

He exercised 50,000 employee stock options, each with an exercise price of $3.78 per share. These options were granted on 2022-02-07, vested in 48 equal monthly installments, and were originally scheduled to expire on 2032-02-06.

How many ETON shares did Paul V. Maier sell and at what prices?

He sold a total of 50,000 common shares in three blocks: 36,387 shares at $58.64 weighted average (range $58.50–$58.97), 13,485 shares at $60.21 weighted average (range $60.00–$61.00), and 128 shares at $61.77 weighted average (range $61.10–$61.98).

What happened to Paul V. Maier’s ETON stock options after these transactions?

After the 2026-08-28 transaction, the reported position in the employee stock option for 50,000 shares was reduced to 0, indicating the option was fully exercised.

Did the footnotes provide details on ETON trade price ranges for these sales?

Yes. Footnotes state the 36,387-share sale occurred between $58.50–$58.97, the 13,485-share sale between $60.00–$61.00, and the 128-share sale between $61.10–$61.98, with the prices reported as weighted average sales prices.

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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).
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*
MAIER PAUL V

(Last)(First)(Middle)
C/O ETON PHARMACEUTICALS, INC.
21925 W. FIELD PARKWAY, SUITE 235

(Street)
DEERPARK ILLINOIS 60010-7208

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Eton Pharmaceuticals, Inc. [ ETON ]
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)
08/28/2026
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 Stock08/28/2026M50,000A$3.78109,745D
Common Stock08/28/2026S36,387D$58.64(1)(2)73,358D
Common Stock08/28/2026S13,485D$60.21(1)(4)59,873D
Common Stock08/28/2026S128D$61.77(1)(5)59,745D
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
Employee Stock Option$3.7808/28/2026M50,00002/07/2022(3)02/06/2032Common Stock50,000$00D
Explanation of Responses:
1. The Reporting Person will provide upon request by the Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price.
2. The shares were sold in multiple trades at prices ranging from $58.50 to $58.97. The price reported above reflects the weighted average sales price.
3. The shares subject to the option vested in 48 equal monthly installments from the date of grant (2-07-2022) until fully vested.
4. The shares were sold in multiple trades at prices ranging from $60.00 to $61.00. The price reported above reflects the weighted average sales price.
5. The shares were sold in multiple trades at prices ranging from $61.10 to $61.98. The price reported above reflects the weighted average sales price.
Remarks:
The reporting person has authorized and designated the named person to file this Form 4 on the reporting person's behalf for indefinite duration.
/s/ Judith Matthews08/28/2026
** 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)