Wednesday, October 28, 2026
Data from SEC filings, checked daily
Public filings, plainly told
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Insider tradingForm 4

Inhibrx Biosciences, Inc. (INBX) Insider Trading

13 open-market trades reported since Sep 8, 2026: 8 purchases worth $6.35M and 5 sales worth $279K.

By insider

InsiderRoleBuysBoughtSellsSoldLatest
Mark LappeCEO4$4.49M0$0Oct 14, 2026
Jon Faiz KayyemDirector3$1.57M0$0Sep 23, 2026
Kimberly ManhardDirector0$05$279KSep 15, 2026
Douglas ForsythDirector1$287K0$0Sep 8, 2026
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All trades

INBX insider trades
FiledTradedInsiderRoleTypeSharesPrice ($)ValueHolding3 mo. afterFiling
Oct 14Oct 14Mark LappeCEOCEO (ind.)▲ BUY10,04084.56$849K+6.3%Form 4 ↗
Sep 28Sep 25Mark LappeCEOCEO (ind.)▲ BUY5,50099.16$545K+0.8%Form 4 ↗
Sep 28Sep 28Mark LappeCEOCEO (ind.)▲ BUY4,500100.76$453K+0.6%Form 4 ↗
Sep 23Sep 23Jon Faiz KayyemDirectorDirector (ind.)▲ BUY5,000100.00$500K+1.2%Form 4 ↗
Sep 17Sep 16Jon Faiz KayyemDirectorDirector (ind.)▲ BUY5,000100.00$500K+1.2%Form 4 ↗
Sep 15Sep 11Kimberly ManhardDirectorDirector (ind.)▼ SELL500111.78$56K−5.6%Form 4 ↗
Sep 15Sep 14Kimberly ManhardDirectorDirector (ind.)▼ SELL500110.26$55K−5.9%Form 4 ↗
Sep 15Sep 15Kimberly ManhardDirectorDirector (ind.)▼ SELL500105.05$53K−6.3%Form 4 ↗
Sep 10Sep 9Kimberly ManhardDirectorDirector (ind.)▼ SELL500115.80$58K−5.3%Form 4 ↗
Sep 10Sep 8Kimberly ManhardDirectorDirector (ind.)▼ SELL500115.14$58K−5.0%Form 4 ↗
Sep 8Sep 8Mark LappeCEOCEO (ind.)▲ BUY25,000105.82$2.65M+3.5%Form 4 ↗
Sep 8Sep 8Jon Faiz KayyemDirectorDirector (ind.)▲ BUY5,000113.52$568K+1.2%Form 4 ↗
Sep 8Sep 8Douglas ForsythDirectorDirector (ind.)▲ BUY2,500114.65$287K+1.1%Form 4 ↗
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings