Company · Ownership research

Eos Energy Enterprises, Inc. EOSE

CIK 0001805077

Form 4 transactions dated Sep 1, 2023 to Sep 27, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 87 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-09.

Insider purchases & sales

Purchased: $857.95K
Sold: $25.21M

Sep 1, 2023 – Sep 9, 2026
Available records · partial months are marked ·

202510 of 20 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-08	Stidolph Russell Monoki Director	Sale	$460.78K 29,999 shares sold	1.39% sold Indirect holding	▾
2025-12-08	Stidolph Russell Monoki Director	Sale	$3.52M 236,135 shares sold	Unavailable Direct holding	▾
2025-12-05	Stidolph Russell Monoki Director	Sale	$7.50M 500,000 shares sold	Unavailable Indirect holding	▾
2025-12-05	Bornstein Jeffrey S Director	Sale	$486.54K 32,328 shares sold	21.83% sold Direct holding	▾
2025-12-04	Bornstein Jeffrey S Director	Sale	$126.00K 8,000 shares sold	100.00% sold LLC holding	▾
2025-12-04	Walters Marian Director	Sale	$790.50K 50,000 shares sold	26.98% sold Direct holding	▾
2025-09-08	Puri Sumeet Chief Accounting Officer	Sale10b5-1 footnote	$288.10K 40,501 shares sold	19.78% sold Direct holding	▾
2025-09-03	Walters Marian Director	Sale	$395.00K 50,000 shares sold	27.20% sold Direct holding	▾
2025-08-04	DIMITRIEF ALEXANDER Director	Sale	$270.00K 45,000 shares sold	17.02% sold Direct holding	▾
2025-07-29	Mastrangelo Joe Chief Executive Officer · Director	Sale10b5-1 footnote	$990.00K 166,667 shares sold	10.62% sold Direct holding	▾

Showing 20 / 20 record groups in 2025. The complete set is available through the API.

Eos Energy Enterprises, Inc. · EOSE

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 20 of 20 purchase / sale groups and 30 of 87 other groups; the totals and the monthly series cover the whole window.

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

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Sources, coverage & how to read this data

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.