Nasdaq · CIK 0002007919
INBX Inhibrx Biosciences, Inc.
Insider trading from SEC Form 4. Last filing 14 d ago. Close $95.01 on Oct 9, 2026, +235% from the 52-week low and -33% from the high.
Last 90 days
Net insider value
+$5.2M
more bought than sold
Buys
6
$5.5M by 3 insiders
Sells
2
$279k by 1 insider
Insiders on file
8
with a Form 4 at this company
Price and insider trades, last year
INBXOct 9, 2026 · close 95.01
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Inhibrx Biosciences, Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 63Notable | Mark Lappe Chief Executive Officer buy | $999k 10,000 shares | +1% | - | |
| 46Moderate | Jon Faiz Kayyem director buy | $500k 5,000 shares | +1% | - | |
| 53Moderate | Jon Faiz Kayyem director buy | $500k 5,000 shares | +1% | - | |
| 31Weak | Kimberly Manhard director sell | $164k 1,500 shares | -17% | - | |
| 30Weak | Kimberly Manhard director sell | $115k 1,000 shares | -10% | - | |
| 44Moderate | Douglas Forsyth director buy | $287k 2,500 shares | +1% | - | |
| 65Notable | Mark Lappe Chief Executive Officer buy | $2.6M 25,000 shares | +4% | - | |
| 49Moderate | Jon Faiz Kayyem director buy | $568k 5,000 shares | +1% | - | |
| 42Moderate | Viking Global Investors LP owner sell | $11M 350,000 shares | -22% | +209% from low-6% from high | |
| 50Moderate | Jon Faiz Kayyem director buy | $1.5M 107,186 shares | +660% | - |
Transactions
The last 41 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 25, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +3,324 | $98.87 | $329k | 733,872 | 14 d ago |
| Sep 25, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +2,176 | $99.60 | $217k | 736,048 | 14 d ago |
| Sep 28, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +1,500 | $98.88 | $148k | 737,548 | 14 d ago |
| Sep 28, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +3,000 | $101.70 | $305k | 740,548 | 14 d ago |
| Sep 23, 2026 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | +5,000 | $100.00 | $500k | 434,360 | 19 d ago |
| Jun 3, 2026 | Kimberly Manhard director | AGrant or award Stock Option (right to buy)derivative | +10,000 | $0.00 | $0 | 10,000 | 24 d ago |
| Jun 3, 2026 | Kristiina Vuori MD director | AGrant or award Stock Option (right to buy)derivative | +10,000 | $0.00 | $0 | 10,000 | 24 d ago |
| Jun 3, 2026 | Jon Faiz Kayyem director | AGrant or award Stock Option (right to buy)derivative | +10,000 | $0.00 | $0 | 10,000 | 24 d ago |
| Jun 3, 2026 | Douglas Forsyth director | AGrant or award Stock Option (right to buy)derivative | +10,000 | $0.00 | $0 | 10,000 | 24 d ago |
| Sep 16, 2026 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | +5,000 | $100.00 | $500k | 429,360 | 25 d ago |
| Sep 11, 2026 | Kimberly Manhard director | SOpen-market sale Common Stockindirect: Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | -500 | $111.78 | $56k | 8,500 | 27 d ago |
| Sep 14, 2026 | Kimberly Manhard director | SOpen-market sale Common Stockindirect: Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | -500 | $110.26 | $55k | 8,000 | 27 d ago |
| Sep 15, 2026 | Kimberly Manhard director | SOpen-market sale Common Stockindirect: Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | -500 | $105.05 | $53k | 7,500 | 27 d ago |
| Sep 8, 2026 | Kimberly Manhard director | SOpen-market sale Common Stockindirect: Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | -500 | $115.14 | $58k | 9,500 | 32 d ago |
| Sep 9, 2026 | Kimberly Manhard director | SOpen-market sale Common Stockindirect: Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | -500 | $115.80 | $58k | 9,000 | 32 d ago |
| Sep 8, 2026 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | +5,000 | $113.52 | $568k | 424,360 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +5,895 | $99.29 | $585k | 711,443 | 34 d ago |
| Sep 8, 2026 | Douglas Forsyth director | POpen-market purchase Common Stockindirect: By the Forsyth Family Trust Dated July 20, 2001 | +2,500 | $114.65 | $287k | 227,064 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +6,605 | $100.64 | $665k | 718,048 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +1,100 | $107.12 | $118k | 719,148 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +500 | $108.24 | $54k | 719,648 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +1,219 | $111.88 | $136k | 720,867 | 34 d ago |
| Sep 8, 2026 | Mark Lappe Chief Executive Officer | POpen-market purchase Common Stockindirect: By the Lappe Family Trust | +9,681 | $112.28 | $1.1M | 730,548 | 34 d ago |
| Oct 7, 2025 | Viking Global Investors LP owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -308,643 | $32.25 | $10.0M | 1,267,823 | Oct 9, 2025 |
| Oct 7, 2025 | Viking Global Investors LP owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -16,315 | $32.25 | $526k | 67,018 | Oct 9, 2025 |
| Oct 7, 2025 | Viking Global Investors LP owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -25,042 | $32.25 | $808k | 102,864 | Oct 9, 2025 |
| May 28, 2025 | Douglas Forsyth director | AGrant or award Stock Option (right to buy)derivative | +15,000 | $0.00 | $0 | 15,000 | May 29, 2025 |
| May 28, 2025 | Jon Faiz Kayyem director | AGrant or award Stock Option (right to buy)derivative | +15,000 | $0.00 | $0 | 15,000 | May 29, 2025 |
| May 28, 2025 | Kristiina Vuori MD director | AGrant or award Stock Option (right to buy)derivative | +15,000 | $0.00 | $0 | 15,000 | May 29, 2025 |
| May 28, 2025 | Kimberly Manhard director | AGrant or award Stock Option (right to buy)derivative | +15,000 | $0.00 | $0 | 15,000 | May 29, 2025 |
| Apr 1, 2025 | Kelly Deck Chief Financial Officer | AGrant or award Stock Option (right to buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Apr 2, 2025 |
| Apr 1, 2025 | David Matly President | AGrant or award Stock Option (right to buy)derivative | +50,000 | $0.00 | $0 | 50,000 | Apr 2, 2025 |
| Mar 27, 2025 | Jon Faiz Kayyem director | GGift Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | -90,000 | $0.00 | $0 | 419,360 | Mar 28, 2025 |
| Dec 16, 2024 | Jon Faiz Kayyem director | GGift Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | -500,000 | $0.00 | $0 | 509,360 | Dec 17, 2024 |
| Dec 16, 2024 | Jon Faiz Kayyem director | GGift Common Stockindirect: By Jon Faiz Kayyem Revocable Trust | +250,000 | $0.00 | $0 | 250,000 | Dec 17, 2024 |
| Dec 16, 2024 | Jon Faiz Kayyem director | GGift Common Stockindirect: By Paige Gates-Kayyem Revocable Trust | +250,000 | $0.00 | $0 | 250,000 | Dec 17, 2024 |
| Dec 6, 2024 | Jon Faiz Kayyem director | GGift Common Stockindirect: By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | -52,000 | $0.00 | $0 | 1,009,360 | Dec 6, 2024 |
| Nov 19, 2024 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By Child A | +34,843 | $14.23 | $496k | 51,093 | Nov 22, 2024 |
| Nov 19, 2024 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By Child B | +34,843 | $14.23 | $496k | 51,093 | Nov 22, 2024 |
| Nov 20, 2024 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By Child A | +18,750 | $14.19 | $266k | 69,843 | Nov 22, 2024 |
| Nov 20, 2024 | Jon Faiz Kayyem director | POpen-market purchase Common Stockindirect: By Child B | +18,750 | $14.19 | $266k | 69,843 | Nov 22, 2024 |
Insiders
Everyone who has filed a Form 4 here.
- Kelly DeckChief Financial Officer
- Douglas Forsythdirector
- Jon Faiz Kayyemdirector
- Mark LappeChief Executive Officer
- Kimberly Manharddirector
- David MatlyPresident
- Viking Global Investors LPowner
- Kristiina Vuori MDdirector
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.