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Eton Pharmaceuticals, Inc.

ETON
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001710340

In the last 90 days, Eton Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 164 institutions reported holding it in 13F filings for Q2 2026, worth $766.6M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Eton Pharmaceuticals, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
5 filings
4 insiders, $16.5M in total
Insiders trading
4
Net value
−$16.5M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Eton Pharmaceuticals, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Eton Pharmaceuticals, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Maier Paul VDirector72,245Aug 31, 20263
Krempa DavidChief Business Officer37,025Aug 24, 20267
Brynjelsen SeanPresident & CEO961,194Aug 20, 20266
Casamento Charles JDirector–Aug 4, 20262
Matthews Judith M.Chief Financial Officer–Aug 4, 20261
Erdogan-Trinkaus IpekChief Commercial Officer2,403Aug 4, 20263
Riedel Norbert GDirector67,155Aug 4, 20264
Adams Jennifer McKieDirector0Aug 4, 20263
Opaleye Management Inc.10% Owner40,000IndirectJul 17, 20262
Gruber James R.Chief Financial Officer213,420Jan 14, 20262
Troutman William WilsonCFO and Secretary23,027Feb 28, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 31, 2026 (view filing)4:06 PM ETAug 283 daysMaier Paul VDirectorSSale−50.0K$59.07−$2.95M−45.6%59.7K afterAmended3 lots
Aug 24, 2026 (view filing)5:19 PM ETAug 24Same dayKrempa DavidChief Business OfficerSSale−25.0K$65.07−$1.63M−40.3%37.0K after
Aug 20, 2026 (view filing)6:26 PM ETAug 19-201 dayBrynjelsen SeanPresident & CEOSSale−100.0K$60.88−$6.09M−9.4%961.2K after4 lots
Jul 17, 2026 (view filing)7:12 PM ETJul 143 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−28.3K$37.54−$1.06M−41.4%40.0K afterAmended2 lots
Jul 7, 2026 (view filing)6:29 PM ETJul 2-75 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−126.7K$37.64−$4.77M−70.4%53.3K after5 lots
Jun 17, 2026 (view filing)Jun 17Same dayAdams Jennifer McKieDirectorSSale−50.0K$32.48−$1.62M−100.0%0 after
May 29, 2026 (view filing)May 281 dayBrynjelsen SeanPresident & CEOSSale−120.0K$31.88−$3.83M−12.6%833.7K after2 lots
May 27, 2026 (view filing)May 22-275 daysKrempa DavidChief Business OfficerSSale−100.0K$32.30−$3.23M−79.8%25.2K after5 lots
Aug 20, 2025 (view filing)Aug 19-201 dayGruber James R.Chief Financial OfficerSSale−41.7K$16.15−$673.7K−16.9%204.8K after2 lots
Jun 16, 2025 (view filing)Jun 12-164 daysKrempa DavidChief Business OfficerSSale−34.0K$14.83−$504.3K−5.3%612.6K after3 lots
Jun 12, 2025 (view filing)Jun 102 daysOpaleye Management Inc.10% OwnerPPurchaseCommon Stock, par value $0.001 per share+7.93K$15.82+$125.5K+10.3%85.0K after2 lots
Jun 5, 2025 (view filing)Jun 3-52 daysBrynjelsen SeanPresident & CEOSSale−210.0K$17.11−$3.59M−6.8%2.87M after5 lots
Oct 25, 2024 (view filing)Oct 232 daysOpaleye Management Inc.10% OwnerPPurchaseCommon Stock, par value $0.001 per share+10.0K$7.98+$79.8K+0.4%2.77M after
Oct 8, 2024 (view filing)Oct 4-84 daysOpaleye Management Inc.10% OwnerPPurchaseCommon Stock, par value $0.001 per share+62.1K$6.99+$434.1K+310.3%82.1K after6 lots
Sep 12, 2024 (view filing)Sep 10-112 daysOpaleye Management Inc.10% OwnerPPurchaseCommon Stock, par value $0.001 per share+107.5K$4.70+$504.9KNew position75.0K after4 lots
Sep 23, 2022 (view filing)Sep 221 dayBrynjelsen SeanChief Executive OfficerPPurchase+10.0K$2.10+$21.0K+1.0%1.04M after
Nov 19, 2021 (view filing)Nov 172 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−25.0K$4.67−$116.8K−1.0%2.38M after
Nov 17, 2021 (view filing)Nov 15-162 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−15.4K$4.85−$74.8K−15.4%85.0K after4 lots
Nov 9, 2021 (view filing)Nov 5-84 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−220.4K$6.25−$1.38M−71.8%86.4K after4 lots
Nov 5, 2021 (view filing)Nov 3-42 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−202.2K$6.49−$1.31M−67.5%97.5K after4 lots
Oct 13, 2021 (view filing)Oct 8-125 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−165.1K$5.03−$831.1K−58.5%117.1K after6 lots
Aug 20, 2021 (view filing)Aug 20Same dayTroutman William WilsonCFO, Treasurer & SecretaryPPurchase+5.00K$4.43+$22.1K+27.7%23.0K after
Aug 20, 2021 (view filing)Aug 20Same dayBrynjelsen SeanPresident & CEOPPurchase+10.0K$4.32+$43.2K+1.0%1.03M after
Aug 6, 2021 (view filing)Aug 4-62 daysOpaleye Management Inc.10% OwnerSSaleCommon Stock, par value $0.001 per share−604.5K$5.83−$3.52M−83.8%117.1K after6 lots