Company · Ownership research

Lantheus Holdings, Inc. LNTH

CIK 0001521036

Form 4 transactions dated Sep 1, 2023 to Sep 28, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 61 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-02.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $0.00
Sold: $417.52M

Sep 1, 2023 – Sep 2, 2026
Available records · partial months are marked ·

Insiders in this window

202510 of 16 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-08-20	WEHRLY MARK C · PATEL RAJIV A · Spokes Andrew J M · Roberts Thomas G. Jr. · Warren John R. · Seybold William · Saito Edric C. · Short Daniel S. Member of a Group Owning 10%	Sale	$188.94M 3,365,000 shares sold	Unavailable Indirect holding	▾
2025-08-20	FARALLON PARTNERS L L C/CA · FRIED RICHARD B · Giauque Nicolas · Linn Michael G · Kim David T · Dreyfuss Philip D · Gehani Varun N · Dapice Joshua J. · Dunn Hannah E. · Luo Patrick (Cheng) 10% owner · Member of a Group Owning 10%	Sale	$188.94M 3,365,000 shares sold	Unavailable Indirect holding	▾
2025-08-19	WEHRLY MARK C · PATEL RAJIV A · Spokes Andrew J M · Roberts Thomas G. Jr. · Warren John R. · Seybold William · Saito Edric C. · Short Daniel S. Member of a Group Owning 10%	Sale	$2.27M 41,000 shares sold	Unavailable Indirect holding	▾
2025-08-19	FARALLON PARTNERS L L C/CA · FRIED RICHARD B · Giauque Nicolas · Linn Michael G · Kim David T · Dreyfuss Philip D · Gehani Varun N · Dapice Joshua J. · Dunn Hannah E. · Luo Patrick (Cheng) 10% owner · Member of a Group Owning 10%	Sale	$2.27M 41,000 shares sold	Unavailable Indirect holding	▾
2025-08-13	Blanchfield Paul President	Sale10b5-1 footnote	$163.92K 3,060 shares sold	2.75% sold Direct holding	▾
2025-06-13	Niedzwiecki Daniel See Remarks	Sale10b5-1 footnote	$472.44K 6,000 shares sold	6.45% sold Direct holding	▾
2025-06-09	McHugh Julie Director	Sale10b5-1 footnote	$423.77K 5,192 shares sold	16.67% sold Direct holding	▾
2025-06-09	Marshall Robert J. Jr. CFO and Treasurer	Sale10b5-1 footnote	$3.30M 39,773 shares sold	30.92% sold Direct holding	▾
2025-06-05	Blanchfield Paul President	Sale10b5-1 footnote	$525.61K 6,599 shares sold	5.57% sold Direct holding	▾
2025-06-05	Niedzwiecki Daniel See Remarks	Sale10b5-1 footnote	$477.90K 6,000 shares sold	6.06% sold Direct holding	▾

Showing 16 / 16 record groups in 2025. The complete set is available through the API.

Lantheus Holdings, Inc. · LNTH

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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 16 of 16 purchase / sale groups and 30 of 61 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"LNTH","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.