Company · Ownership research

Inhibrx Biosciences, Inc. INBX

CIK 0002007919

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through Oct 14, 2026.

Insider purchases & sales

Purchased: $17.69M
Sold: $11.57M

Nov 1, 2023 – Oct 14, 2026
Available records · partial months are marked ·

202610 of 14 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 14, 2026	Lappe Mark Chief Executive Officer · Director	Purchase	$426.18K 5,040 shares bought	0.68% added Trust holding	▾
Oct 14, 2026	Lappe Mark Chief Executive Officer · Director	Purchase	$422.80K 5,000 shares bought	3.03% added Trust holding	▾
Sep 28, 2026	Lappe Mark Chief Executive Officer · Director	Purchase	$453.43K 4,500 shares bought	0.61% added Trust holding	▾
Sep 25, 2026	Lappe Mark Chief Executive Officer · Director	Purchase	$545.36K 5,500 shares bought	0.75% added Trust holding	▾
Sep 23, 2026	Kayyem Jon Faiz Director	Purchase	$500.00K 5,000 shares bought	1.16% added Trust holding	▾
Sep 16, 2026	Kayyem Jon Faiz Director	Purchase	$500.00K 5,000 shares bought	1.18% added Trust holding	▾
Sep 15, 2026	MANHARD KIMBERLY Director	Sale	$52.52K 500 shares sold	6.25% sold Trust holding	▾
Sep 14, 2026	MANHARD KIMBERLY Director	Sale	$55.13K 500 shares sold	5.88% sold Trust holding	▾
Sep 11, 2026	MANHARD KIMBERLY Director	Sale	$55.89K 500 shares sold	5.56% sold Trust holding	▾
Sep 9, 2026	MANHARD KIMBERLY Director	Sale	$57.90K 500 shares sold	5.26% sold Trust holding	▾

Showing 14 / 14 record groups in 2026. The complete set is available through the API.

Inhibrx Biosciences, Inc. · INBX

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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. Share totals are on today's split-adjusted basis. 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.