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Eton Pharmaceuticals, Inc.

ETON
Healthcare|Drug Manufacturers - Specialty & Generic|US
$56.46
+9.31 (+19.75%)
Tangible Book / Share
$1.49
Graham Number
$10.90
Cash / Share
$1.94

Ownership Breakdown

78.7%
Float
28.6M
Shares Outstanding
22.5M
Float Shares

Major Holders (7)

Combined: 55.1%

Holders of 5%+ from their latest Schedule 13D/13G filing in the last two years. Percentages are as of each filing date.

HolderType% of ClassSharesFiledFiling
Opaleye Management Inc.IA, CO8.54%2,440,000Nov 6, 202613D/G
Silverman JamesIndividual8.54%2,440,000Nov 6, 202613D/G
Opaleye, L.P.Partnership8.47%2,420,000Nov 6, 202613D/G
Oleg NodelmanHC, IN7.70%1,981,003Feb 14, 202513D/G
EcoR1 Capital, LLCIA, OO7.70%1,981,003Feb 14, 202513D/G
EcoR1 Capital Fund Qualified, L.P.Partnership7.20%1,864,034Feb 14, 202513D/G
BlackRock, Inc.Holding company6.90%1,882,410Jul 28, 202613D/G

Insider Trades (100)

Last 4 quarters: 1,706,095 acquired · 936,387 disposed
InsiderPositionDateTypeSharesPriceValueFiling
Krempa DavidChief Business OfficerOct 2, 2026OPTION EX.10,522——Form 4
Krempa DavidChief Business OfficerOct 6, 2026SELL4,166$55.07$229.4KForm 4
Krempa DavidChief Business OfficerOct 2, 2026OPTION EX.10,522——Form 4
MAIER PAUL VdirectorAug 28, 2026OPTION EX.12,500$7.31$91.4KForm 4
MAIER PAUL VdirectorAug 28, 2026OPTION EX.12,500$7.31$91.4KForm 4
MAIER PAUL VdirectorAug 28, 2026OPTION EX.50,000$3.78$189.0KForm 4
MAIER PAUL VdirectorAug 28, 2026SELL36,387$58.64$2.1MForm 4
MAIER PAUL VdirectorAug 28, 2026SELL13,485$60.21$811.9KForm 4
MAIER PAUL VdirectorAug 28, 2026SELL128$61.77$7.9KForm 4
MAIER PAUL VdirectorAug 28, 2026OPTION EX.50,000$3.78$189.0KForm 4
Krempa DavidChief Business OfficerAug 24, 2026OPTION EX.25,000$7.31$182.8KForm 4
Krempa DavidChief Business OfficerAug 24, 2026OPTION EX.25,000$7.31$182.8KForm 4
Krempa DavidChief Business OfficerAug 24, 2026SELL25,000$65.07$1.6MForm 4
BRYNJELSEN SEANdirector, officer: President & CEOAug 19, 2026SELL8,978$62.65$562.5KForm 4
BRYNJELSEN SEANdirector, officer: President & CEOAug 20, 2026SELL47,307$60.17$2.8MForm 4
BRYNJELSEN SEANdirector, officer: President & CEOAug 20, 2026SELL36,373$61.11$2.2MForm 4
BRYNJELSEN SEANdirector, officer: President & CEOAug 20, 2026SELL7,342$62.12$456.1KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER0——Form 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER31,508$15.47$487.4KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER7,194——Form 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER14,317$13.00$186.1KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER10,000$14.68$146.8KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER92,993$4.42$411.0KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER10,000$4.74$47.4KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER42,224$3.47$146.5KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER35,000$8.61$301.4KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER60,000$3.58$214.8KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER18,742$1.38$25.9KForm 4
Radosavljevic DankaChief Operating OfficerJul 31, 2026OTHER128,985——Form 4
CASAMENTO CHARLES JdirectorJul 31, 2026AWARD10,000——Form 4
Matthews Judith M.Chief Financial OfficerJul 31, 2026AWARD32,246——Form 4
Erdogan-Trinkaus IpekChief Commercial OfficerJul 31, 2026AWARD80,000——Form 4
BRYNJELSEN SEANdirector, officer: President & CEOJul 31, 2026AWARD128,985——Form 4
Krempa DavidChief Business OfficerJul 31, 2026AWARD128,985——Form 4
MAIER PAUL VdirectorJul 31, 2026AWARD10,000——Form 4
RIEDEL NORBERT GdirectorJul 31, 2026AWARD10,000——Form 4
Adams Jennifer McKiedirectorJul 31, 2026AWARD10,000——Form 4
Opaleye Management Inc.10 percent ownerJul 14, 2026SELL15,000$37.54$563.1KForm 4
Opaleye Management Inc.10 percent ownerJul 14, 2026SELL13,315$37.54$499.9KForm 4
Opaleye Management Inc.10 percent ownerJul 14, 2026SELL15,000$37.54$563.1KForm 4
Opaleye Management Inc.10 percent ownerJul 14, 2026SELL13,315$37.54$499.9KForm 4
BRYNJELSEN SEANdirector, officer: President & CEOJul 14, 2026OPTION EX.200,000$1.37$274.0KForm 4
BRYNJELSEN SEANdirector, officer: President & CEOJul 12, 2026OPTION EX.27,500——Form 4
BRYNJELSEN SEANdirector, officer: President & CEOJul 12, 2026OPTION EX.27,500——Form 4
BRYNJELSEN SEANdirector, officer: President & CEOJul 14, 2026OPTION EX.200,000$1.37$274.0KForm 4
Krempa DavidChief Business OfficerJul 12, 2026OPTION EX.10,000——Form 4
Krempa DavidChief Business OfficerJul 12, 2026OPTION EX.10,000——Form 4
Opaleye Management Inc.10 percent ownerJul 2, 2026SELL65,000$37.39$2.4MForm 4
Opaleye Management Inc.10 percent ownerJul 6, 2026SELL10,000$38.00$380.0KForm 4
Opaleye Management Inc.10 percent ownerJul 7, 2026SELL20,000$38.37$767.5KForm 4
Opaleye Management Inc.10 percent ownerJul 2, 2026SELL25,000$37.39$934.6KForm 4
Opaleye Management Inc.10 percent ownerJul 7, 2026SELL6,685$38.37$256.5KForm 4
Krempa DavidChief Business OfficerJun 26, 2026AWARD10,000——Form 4
Adams Jennifer McKiedirectorJun 17, 2026OPTION EX.50,000$3.78$189.0KForm 4
Adams Jennifer McKiedirectorJun 17, 2026OPTION EX.50,000$3.78$189.0KForm 4
Adams Jennifer McKiedirectorJun 17, 2026SELL50,000$32.48$1.6MForm 4
Matthews Judith M.Chief Financial OfficerJun 1, 2026OTHER37,000$26.05$963.9KForm 4
BRYNJELSEN SEANdirector, officer: President & CEOMay 28, 2026SELL119,852$31.88$3.8MForm 4
BRYNJELSEN SEANdirector, officer: President & CEOMay 28, 2026SELL148$32.67$4.8KForm 4
Krempa DavidChief Business OfficerMay 22, 2026OPTION EX.30,591$3.58$109.5KForm 4
Krempa DavidChief Business OfficerMay 27, 2026OPTION EX.7,203$3.58$25.8KForm 4
Krempa DavidChief Business OfficerMay 22, 2026OPTION EX.30,591$3.58$109.5KForm 4
Krempa DavidChief Business OfficerMay 26, 2026OPTION EX.12,524$1.37$17.2KForm 4
Krempa DavidChief Business OfficerMay 26, 2026OPTION EX.25,000$1.38$34.5KForm 4
Krempa DavidChief Business OfficerMay 27, 2026OPTION EX.7,203$3.58$25.8KForm 4
Krempa DavidChief Business OfficerMay 27, 2026OPTION EX.12,476$1.37$17.1KForm 4
Krempa DavidChief Business OfficerMay 22, 2026SELL32,963$33.22$1.1MForm 4
Krempa DavidChief Business OfficerMay 22, 2026SELL9,315$33.88$315.6KForm 4
Krempa DavidChief Business OfficerMay 22, 2026SELL519$35.00$18.2KForm 4
Krempa DavidChief Business OfficerMay 27, 2026SELL19,679$31.47$619.4KForm 4
Krempa DavidChief Business OfficerMay 26, 2026SELL37,524$31.49$1.2MForm 4
Krempa DavidChief Business OfficerMay 26, 2026OPTION EX.12,524$1.37$17.2KForm 4
Krempa DavidChief Business OfficerMay 27, 2026OPTION EX.12,476$1.37$17.1KForm 4
Krempa DavidChief Business OfficerMay 26, 2026OPTION EX.25,000$1.38$34.5KForm 4
RIEDEL NORBERT GdirectorApr 21, 2026OPTION EX.19,655$8.61$169.2KForm 4
RIEDEL NORBERT GdirectorApr 21, 2026OPTION EX.12,500$7.31$91.4KForm 4
RIEDEL NORBERT GdirectorApr 21, 2026OPTION EX.19,655$8.61$169.2KForm 4
RIEDEL NORBERT GdirectorApr 21, 2026OPTION EX.12,500$7.31$91.4KForm 4
RIEDEL NORBERT GdirectorFeb 3, 2026X30,000$4.42$132.6KForm 4
RIEDEL NORBERT GdirectorFeb 3, 2026DISPOSED30,000$4.42$132.6KForm 4
RIEDEL NORBERT GdirectorJan 12, 2026AWARD7,757——Form 4
RIEDEL NORBERT GdirectorJan 12, 2026AWARD12,196$15.47$188.7KForm 4
Adams Jennifer McKiedirectorJan 12, 2026AWARD7,757——Form 4
Adams Jennifer McKiedirectorJan 12, 2026AWARD12,196$15.47$188.7KForm 4
CASAMENTO CHARLES JdirectorJan 12, 2026AWARD7,757——Form 4
CASAMENTO CHARLES JdirectorJan 12, 2026AWARD12,196$15.47$188.7KForm 4
MAIER PAUL VdirectorJan 12, 2026AWARD7,757——Form 4
MAIER PAUL VdirectorJan 12, 2026AWARD12,196$15.47$188.7KForm 4
Erdogan-Trinkaus IpekChief Commercial OfficerJan 12, 2026AWARD25,856——Form 4
Erdogan-Trinkaus IpekChief Commercial OfficerJan 12, 2026AWARD40,655$15.47$628.9KForm 4
BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEOJan 12, 2026AWARD100,517——Form 4
BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEOJan 12, 2026AWARD158,046$15.47$2.4MForm 4
BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEOJan 1, 2026TAX W/H5,015$15.39$77.2KForm 4
Krempa DavidChief Business OfficerJan 12, 2026AWARD25,856——Form 4
Krempa DavidChief Business OfficerJan 12, 2026AWARD40,655$15.47$628.9KForm 4
Krempa DavidChief Business OfficerJan 14, 2026TAX W/H1,942$15.62$30.3KForm 4
Gruber James R.Chief Financial OfficerJan 12, 2026AWARD25,856——Form 4
Gruber James R.Chief Financial OfficerJan 12, 2026AWARD40,655$15.47$628.9KForm 4
Gruber James R.Chief Financial OfficerJan 14, 2026TAX W/H2,293$15.47$35.5KForm 4
Erdogan-Trinkaus IpekChief Commercial OfficerDec 12, 2025TAX W/H85$16.90$1.4KForm 4

Congress & Senate Trades (1)

Thomas SuozziHouse · NY03Oct 11, 2022
Purchase$15,001 - $50,000Disclosure