Key facts
- This page summarizes David Krempa's Form 4 filing for Eton Pharmaceuticals, Inc. (ETON).
- 15 reported transactions and 5 derivative rows are listed below.
- Accepted by SEC: 27 May 2026, 18:28.
David Krempa - 22 May 2026 Form 4 Insider Report for Eton Pharmaceuticals, Inc. (ETON)
- Reporting relationship
- Chief Business Officer
- Issuer ticker
- ETON
- Reported as of
- 22 May 2026
- Net transaction value
- -$3,229,923
- SEC form
- 4
- Accepted by SEC
- 27 May 2026, 18:28:36 UTC
- Prior SEC filing
- 14 Jan 2026
- Next SEC filing
- 30 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Judith Matthews
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
David Krempa filed Form 4 for Eton Pharmaceuticals, Inc. (ETON) on 27 May 2026.
Change
- Previous filing in this sequence was filed on 14 Jan 2026.
- Current net transaction value: -$3,229,923.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001968254
Primary reporting owner
Krempa David
- Relationship
- Chief Business Officer
- Address
- C/O ETON PHARMACEUTICALS, INC., 21925 W. FIELD PARKWAY, SUITE 235, DEERPARK
- Signature
- /s/ Judith Matthews
- Signature date
- 27 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ETON
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +30,591
- Change %
- +82%
- Price
- $3.58*
- Shares after
- 68,046
- Date
- 22 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Sale
- Transaction value
- $1,095,057
- Shares
- -32,963
- Change %
- -48%
- Price
- $33.22
- Shares after
- 35,083
- Date
- 22 May 2026
- Ownership
- Direct
- Footnotes
- F1, F7
ETON
transaction
Common Stock
Sale
- Transaction value
- $315,594
- Shares
- -9,315
- Change %
- -27%
- Price
- $33.88
- Shares after
- 25,768
- Date
- 22 May 2026
- Ownership
- Direct
- Footnotes
- F1, F2
ETON
transaction
Common Stock
Sale
- Transaction value
- $18,165
- Shares
- -519
- Change %
- -2%
- Price
- $35.00
- Shares after
- 25,249
- Date
- 22 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +25,000
- Change %
- +99%
- Price
- $1.38*
- Shares after
- 50,249
- Date
- 26 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +12,524
- Change %
- +25%
- Price
- $1.37*
- Shares after
- 62,773
- Date
- 26 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Sale
- Transaction value
- $1,181,732
- Shares
- -37,524
- Change %
- -60%
- Price
- $31.49
- Shares after
- 25,249
- Date
- 26 May 2026
- Ownership
- Direct
- Footnotes
- F1, F3
ETON
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +12,476
- Change %
- +49%
- Price
- $1.37*
- Shares after
- 37,725
- Date
- 27 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +7,203
- Change %
- +19%
- Price
- $3.58*
- Shares after
- 44,928
- Date
- 27 May 2026
- Ownership
- Direct
ETON
transaction
Common Stock
Sale
- Transaction value
- $619,375
- Shares
- -19,679
- Change %
- -44%
- Price
- $31.47
- Shares after
- 25,249
- Date
- 27 May 2026
- Ownership
- Direct
- Footnotes
- F1, F5
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
ETON
transaction
Derivative
Employee Stock Option
Options Exercise
- Transaction value
- Shares
- -30,591
- Change %
- -20%
- Price
- $0.000000*
- Shares after
- 125,609
- Date
- 22 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 30,591
- Exercise price
- $3.58
- Footnotes
- F4
ETON
transaction
Derivative
Employee Stock Option
Options Exercise
- Transaction value
- Shares
- -25,000
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 26 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 25,000
- Exercise price
- $1.38
- Footnotes
- F8
ETON
transaction
Derivative
Employee Stock Option
Options Exercise
- Transaction value
- Shares
- -12,524
- Change %
- -50%
- Price
- $0.000000*
- Shares after
- 12,476
- Date
- 26 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 12,524
- Exercise price
- $1.37
- Footnotes
- F6
ETON
transaction
Derivative
Employee Stock Option
Options Exercise
- Transaction value
- Shares
- -12,476
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 27 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 12,476
- Exercise price
- $1.37
- Footnotes
- F6
ETON
transaction
Derivative
Employee Stock Option
Options Exercise
- Transaction value
- Shares
- -7,203
- Change %
- -5.7%
- Price
- $0.000000*
- Shares after
- 118,406
- Date
- 27 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 7,203
- Exercise price
- $3.58
- Footnotes
- F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 8 footnotes
Footnote 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 sold at each separate price.
Footnote F2
The shares were sold in multiple trades at prices ranging from $33.68 to $34.66. The price reported above reflects the weighted average sales price.
Footnote F3
The shares were sold in multiple trades at prices ranging from $31.27 to $32.16. The price reported above reflects the weighted average sales price.
Footnote F4
The shares subject to the option vested in 48 equal monthly installments from the date of grant (3-12-2020) until fully vested.
Footnote F5
The shares were sold in multiple trades at prices ranging from $31.25 to $31.825. The price reported above reflects the weighted average sales price.
Footnote F6
The shares subject to the option vested annually from the date of grant (11-10-2017) in four equal installments.
Footnote F7
The shares were sold in multiple trades at prices ranging from $32.67 to $33.65. The price reported above reflects the weighted average sales price.
Footnote F8
The shares subject to option vested annually from the date of grant (8-7-2017) in four equal installments.
SEC 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.