Companies / Eton Pharmaceuticals, Inc.

Eton Pharmaceuticals, Inc.

Nasdaq: ETONCIK 1710340DEER PARK, IL

Financials · FY2025

Revenue$79.95M
Net income$-4.60M
Total debt$27.90M
Cash$26.84M
Diluted EPS—
Shares outstanding27.4M

Ownership

27.4M shares outstanding · as of May 12, 2026
13.9%Insiders
Ownership
Insiders13.87%3,800,079
Institutions60.95%16,695,162
Public float25.18%6,897,117

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 8

View all →
Insider% of sharesShares
Brynjelsen SeanCEOPresident & CEO · Director · 10% owner
10.55%2,889,266
Krempa DavidChief Business Officer
2.30%630,238
Gruber James R.Chief Financial Officer
0.78%213,420
Riedel Norbert GDirector
0.25%67,155
Adams Jennifer McKieFormerDirector
——
Casamento Charles JDirector
——
Erdogan-Trinkaus IpekChief Commercial Officer
——
Maier Paul VDirector
——

Institutional holders 113

View all →
HolderValue% of shares
BlackRock, Inc.$68.63M6.92%
Opaleye Management Inc.$48.36M10.44%
EcoR1 Capital, LLC$34.34M7.41%
State Street Corporation$25.40M2.56%
Vanguard Group Inc$22.81M4.92%
Nantahala Capital Management, LLC$19.89M4.29%
Geode Capital Management, LLC$14.26M2.11%
Cannell Capital LLC$8.44M1.25%
Morgan Stanley$8.35M1.80%
Westside Investment Management, Inc.$7.96M1.72%

Activity

View all →
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Apr 21, 2026Riedel Norbert G
Director
ExerciseCommon Stock$169.2K+20K
+41.38%
67,155
0.25% of shares
low
Feb 3, 2026Riedel Norbert G
Director
ExerciseCommon Stock$132.6K+30K
+600.00%
35,000
0.13% of shares
low
Apr 21, 2026Riedel Norbert G
Director
ExerciseCommon Stock$91.4K+13K
+35.71%
47,500
0.17% of shares
low
Jan 1, 2026Brynjelsen Sean
CEO
OtherCommon Stock$77.2K-5K
-0.17%
2,889,266
10.55% of shares
low
Jan 14, 2026Gruber James R.
Executive
OtherCommon Stock$35.5K-2K
-1.06%
213,420
0.78% of shares
low
Jan 14, 2026Krempa David
Executive
OtherCommon Stock$30.3K-2K
-0.31%
630,238
2.30% of shares
low
Apr 21, 2026Riedel Norbert G
Director
ExerciseEmployee Stock Option (Right to Buy)—-20K
-100.00%
0
0.00% of shares
low
Apr 21, 2026Riedel Norbert G
Director
ExerciseEmployee Stock Option (Right to Buy)—-13K
-100.00%
0
0.00% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
ETON——29772L108—