Inhibrx Biosciences (INBX) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today 0

3 insiders bought $6.3M, 1 sold $279K.

BuyMark Lappe$210KChief Executive Officerat $85.00 on Oct 14, filed Oct 14

BuyMark LappeChief Executive Officer$210Kat $85.00 on Oct 14, filed Oct 14

BuyMark Lappe$208KChief Executive Officerat $85.00 on Oct 14, filed Oct 14

BuyMark LappeChief Executive Officer$208Kat $85.00 on Oct 14, filed Oct 14

BuyMark Lappe$208KChief Executive Officerat $84.07 on Oct 14, filed Oct 14

BuyMark LappeChief Executive Officer$208Kat $84.07 on Oct 14, filed Oct 14

From SEC Form 4s, the newest filed Oct 14, 2026 · Insiders have 2 business days to file a trade

21 more filings on INBX in the last 6 months, for Pro members. See them free →

We do the work for you. Every stock is scored and ranked, every 15 seconds while the market is open. Here it's 15 minutes behind. Pro members see it live.

See all 24 tradesSee it live, free until Wednesday morning. No account. No card. Then keep going with a free account.

Pro members see every filing on INBX with what each insider bought or sold and at what price, and can turn on an optional alert when an insider buys.

Who files at Inhibrx Biosciences

Insider trades by person

Cluster buys at INBX

3 insiders bought INBX in the last 6 months: Mark Lappe, Jon Faiz Kayyem, and Douglas Forsyth.

Tested. Our top-⁠scored stocks returned 2.2x the average stock over the next month. How we tested it

Questions about INBX's insider trades

As of Nov 2, 2026: Inhibrx Biosciences (INBX) has 24 insider filings on record in the last 6 months, the newest filed Oct 14, 2026. Its Quality Score is 0 (Below Average). Scores as of 9:30 PM ET, 15 minutes behind.

Are INBX insiders buying or selling?

3 insiders bought $6.3M across 19 filings, and one insider sold $279K across 5 filings, in the last 6 months. The newest filing: Mark Lappe, Chief Executive Officer, bought $210K on Oct 14, 2026. 3 insiders bought INBX in the last 6 months: Mark Lappe, Jon Faiz Kayyem, and Douglas Forsyth.

Who are INBX's biggest insider sellers?

The one insider who sold INBX in the last 6 months: Kimberly Manhard (Director), 5 sales.

When did an INBX insider last buy?

Mark Lappe, Chief Executive Officer, bought INBX shares ($210K) on Oct 14, 2026, the newest insider buy on record.

Inhibrx Biosciences's page has its Quality Score, its chart, and its earnings. More in Healthcare and Biotech. INBX is on insider buys, Oct 12 to 18, 2026.