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CIK 0001710340 · Non-accelerated filer<br>Smaller reporting company

Eton Pharmaceuticals, Inc.

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Ticker
ETON
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
371858472
Phone
(847) 787-7361
Business address
21925 W. FIELD PARKWAY, SUITE 235, DEER PARK, IL, 60010-7278
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$19,432,082
in 7 filings

Net −$19,432,082. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. BRYNJELSEN SEAN −$6.1M President & CEO sold 9% of stake
  2. MAIER PAUL V −$5.9M Director sold 63% of stake
  3. CASAMENTO CHARLES J −$5.3M Director sold 100% of stake
  4. Krempa David −$1.9M Chief Business Officer sold 40% of stake
  5. Erdogan-Trinkaus Ipek −$236K Chief Commercial Officer sold 46% of stake
Date Insider Transaction Shares Price Value Owned after
2026-05-22 Krempa David Chief Business Officer Sale −9,315 $33.88 $316K 25,768
2026-05-22 Krempa David Chief Business Officer Sale −519 $35.00 $18K 25,249
2026-05-22 Krempa David Chief Business Officer Option exercise · Employee Stock Option −30,591 125,609
2026-04-21 RIEDEL NORBERT G Director Option exercise +12,500 $7.31 $91K 47,500
2026-04-21 RIEDEL NORBERT G Director Option exercise +19,655 $8.61 $169K 67,155
2026-04-21 RIEDEL NORBERT G Director Option exercise · Employee Stock Option (Right to Buy) −12,500 0
2026-04-21 RIEDEL NORBERT G Director Option exercise · Employee Stock Option (Right to Buy) −19,655 0
2026-02-03 RIEDEL NORBERT G Director Option exercise +30,000 $4.42 $133K 35,000
2026-02-03 RIEDEL NORBERT G Director Option exercise · Employee Stock Option (Right to Buy) −30,000 0
2026-01-14 Krempa David Chief Business Officer Shares withheld for taxes −1,942 $15.62 $30K 630,238
2026-01-14 Gruber James R. Chief Financial Officer Shares withheld for taxes −2,293 $15.47 $35K 213,420
2026-01-12 RIEDEL NORBERT G Director Grant or award · Employee Stock Option (Right to Buy) +12,196 286,496
2026-01-12 RIEDEL NORBERT G Director Grant or award · Restricted Stock Units +7,757 294,253
2026-01-12 Adams Jennifer McKie Director Grant or award · Employee Stock Option (Right to Buy) +12,196 170,329
2026-01-12 Adams Jennifer McKie Director Grant or award · Restricted Stock Units +7,757 178,086
2026-01-12 CASAMENTO CHARLES J Director Grant or award · Employee Stock Option (Right to Buy) +12,196 295,171
2026-01-12 CASAMENTO CHARLES J Director Grant or award · Restricted Stock Units +7,757 302,928
2026-01-12 MAIER PAUL V Director Grant or award · Employee Stock Option (Right to Buy) +12,196 286,496
2026-01-12 MAIER PAUL V Director Grant or award · Restricted Stock Units +7,757 294,253
2026-01-12 Erdogan-Trinkaus Ipek Chief Commercial Officer Grant or award · Employee Stock Option (Right to Buy) +40,655 123,878

Page 5 of 13 · 249 trades