Inhibrx Biosciences, Inc. (INBX)
Nasdaq: INBX · Biological Products, (No Diagnostic Substances) · La Jolla, CA · filing with the SEC since 2024
Who owns Inhibrx Biosciences, Inc.
As filed with the SECHolders of 5% or more
8
Perceptive Advisors LLC holds 9.99% of Common Stock, par value $0.0001, as its SCHEDULE 13G/A filed Aug 14, 2026 says.
Directors and officers
6
report now, of 8 people on the record since 2024. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 8 named at left.
Holders of 5% or moreshare of the class, as filed
Perceptive Advisors LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 · 9.99% in May 15, 2026
Viking Global Investors LP
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · 9.99% in May 15, 2026
Morgan Stanley
SCHEDULE 13G · filed Feb 11, 2026 · Common Stock
Jon Faiz Kayyem
SCHEDULE 13D/A · filed Feb 26, 2025 · Common Stock, par value $0.0001 per share
Mark Lappe
SCHEDULE 13D/A · filed Feb 26, 2025 · Common Stock, par value $0.0001 per share
Bank of America Corporation
SCHEDULE 13G · filed Aug 3, 2026 · Common Stock
Schonfeld Strategic Advisors LLC
SCHEDULE 13G · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share
Blackrock, Inc.
SCHEDULE 13G · filed Jan 21, 2026 · Common Stock · 4.7% in Oct 17, 2025
What INBX reports owning in othersstakes of 5% or more, and other ties
Inhibrx Biosciences, Inc. reports no stake in another company in the record.
Insider tradesForm 4
5sales
20purchases
0sales on a scheduled plan
1people selling
$300,000sold, in dollars
$6.3Mbought, in dollars
Open-market trades on Form 4 from Oct 14, 2025 to Oct 14, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 14, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 17 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Manhard Kimberly | director | 5 | $300,000 | 0 | 0 | $0 |
| Lappe Mark | Chief Executive Officer | 0 | $0 | 0 | 16 | $4.5M |
| Kayyem Jon Faiz | director | 0 | $0 | 0 | 3 | $1.6M |
| Forsyth Douglas | director | 0 | $0 | 0 | 1 | $300,000 |