Company · Ownership research

Eton Pharmaceuticals, Inc. ETON

CIK 0001710340

Form 4 transactions dated Sep 1, 2023 to Sep 26, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-08-28.

Insider purchases & sales

Purchased: $1.14M
Sold: $29.95M

Sep 1, 2023 – Aug 28, 2026
Available records · partial months are marked ·

202510 of 10 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-08-20	Gruber James R. Chief Financial Officer	Sale	$42.15K 2,631 shares sold	1.27% sold Direct holding	▾
2025-08-19	Gruber James R. Chief Financial Officer	Sale	$631.57K 39,082 shares sold	15.99% sold Direct holding	▾
2025-06-16	Krempa David Chief Business Officer	Sale	$150.58K 10,223 shares sold	1.64% sold Direct holding	▾
2025-06-13	Krempa David Chief Business Officer	Sale	$100.44K 6,800 shares sold	1.08% sold Direct holding	▾
2025-06-12	Krempa David Chief Business Officer	Sale	$253.30K 16,977 shares sold	2.63% sold Direct holding	▾
2025-06-10	Opaleye Management Inc. 10% owner	Purchase	$79.12K 5,000 shares bought	0.18% added Indirect holding	▾
2025-06-10	Opaleye Management Inc. 10% owner	Purchase	$46.36K 2,930 shares bought	3.57% added Indirect holding	▾
2025-06-05	BRYNJELSEN SEAN President & CEO · Director · 10% owner	Sale	$1.18M 70,000 shares sold	2.38% sold Direct holding	▾
2025-06-04	BRYNJELSEN SEAN President & CEO · Director · 10% owner	Sale	$1.19M 70,000 shares sold	2.32% sold Direct holding	▾
2025-06-03	BRYNJELSEN SEAN President & CEO · Director · 10% owner	Sale	$1.23M 70,000 shares sold	2.27% sold Direct holding	▾

Showing 10 / 10 record groups in 2025. The complete set is available through the API.

Eton Pharmaceuticals, Inc. · ETON

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{"ticker":"ETON","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.