INBX
Inhibrx Biosciences, Inc. · Healthcare
Insiders bought $3.5M net in the last 90 days ·0 sellers, 3 buyers· latest Form 4 filed Sep 8, 2026
Insider Buying
$3.5M
reported purchases (SEC code P)
Insider Selling
$11.3M
reported sales (SEC code S)
Unique Insiders
4
in the rolling window
Latest filing
Sep 8, 2026
Kayyem Jon Faiz
Inhibrx Biosciences, Inc. (INBX) has 4 SEC Form 4 filings (11 transaction rows) in the rolling window, disclosed by 4 distinct insiders. Most recent filing: Sep 8, 2026.
Inside the rolling window, 4 insiders at Inhibrx Biosciences, Inc. reported 3 open-market purchases totaling $3.5M and 1 open-market sale totaling $11.3M. Insiders have net bought $3.5M over the trailing 6 months. The largest single insider purchase in this window was $2.6M by Chief Executive Officer Lappe Mark on Sep 8, 2026. The most recent open-market filing is a purchase of 5,000 shares by Director Kayyem Jon Faiz, dated Sep 8, 2026, worth $568K.
- Industry:Biotechnology
- CEO:Mark Lappe
- Employees:110
- HQ:La Jolla, CA, US
- IPO:2024-05-29
| Source | |||||||
|---|---|---|---|---|---|---|---|
Kayyem Jon FaizFirst filing | Director | Purchase | 5,000 | $568K | Sep 8 | — | SEC ↗ |
Lappe MarkFirst filing | Chief Executive Officer | Purchase | 25,000 | $2.6M | Sep 8 | — | SEC ↗ |
FORSYTH DOUGLASFirst filing | Director | Purchase | 2,500 | $287K | Sep 8 | — | SEC ↗ |
VIKING GLOBAL INVESTORS LPFirst filing | 10% Owner | Sale | 350,000 | $11.3M | Oct 9 | — | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does INBX have?
Inhibrx Biosciences, Inc. (INBX) has 4 SEC Form 4 filings (11 transaction rows) in the rolling 365-day window, disclosed by 4 distinct insiders. Most recent filing: Sep 8, 2026.
When was the most recent SEC Form 4 filing for INBX?
The most recent Form 4 filing for INBX on Tracefour is dated Sep 8, 2026.
What is the net insider flow at INBX over the last 6 months?
Over the trailing 180 days, insiders at INBX have net bought $3.5M based on SEC Form 4 disclosures.
What was the largest insider purchase at INBX?
The largest single insider open-market purchase at INBX in the rolling window was $2.6M by Chief Executive Officer Lappe Mark on 2026-09-08.
What is the total insider buy and sell value at INBX in the current window?
Inside the rolling window, insiders at INBX bought $3.5M and sold $11.3M based on SEC Form 4 filings.
Can I get alerts for INBX insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Inhibrx Biosciences, Inc. (INBX). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Inhibrx Biosciences, Inc. is in the Healthcare sector.