INBXInhibrx Biosciences, Inc.
- Market cap
- $1.37B
- as of 2026-10-23
- Latest close
- $93.38
- as of 2026-10-23
- Sector
- Healthcare
- as of 2026-10-24
- Industry
- Biotechnology
- as of 2026-10-24
Cluster
2 insiders bought $2.00M between Sep 16 – Sep 28.
Under the default rule (14d · ≥2 insiders · all roles).
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | Holding change | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|---|
| Kayyem Jon Faiz | Sep 16 | Sep 17 | P | 5,000 | $100.00 | Purchase +$500,000 | 429,360 | +1.2% | No | Form 4 |
| Kayyem Jon Faiz | Sep 23 | Sep 23 | P | 5,000 | $100.00 | Purchase +$500,000 | 434,360 | +1.2% | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 25 | Sep 28 | P | 3,324 | $98.87 | Purchase +$328,630 | 733,872 | +0.5% | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 25 | Sep 28 | P | 2,176 | $99.60 | Purchase +$216,727 | 736,048 | +0.3% | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 28 | Sep 28 | P | 1,500 | $98.88 | Purchase +$148,320 | 737,548 | +0.2% | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 28 | Sep 28 | P | 3,000 | $101.70 | Purchase +$305,106 | 740,548 | +0.4% | No | Form 4 |
Form 4 historysince 2024-05-30
Dashed line = amended filing (Form 4/A)
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 2,470 | $84.07 | Purchase +$207,655 | 743,018 | No | Form 4 |
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 2,470 | $85.00 | Purchase +$209,948 | 745,488 | No | Form 4 |
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 100 | $85.76 | Purchase +$8,576 | 745,588 | No | Form 4 |
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 2,449 | $84.07 | Purchase +$205,889 | 167,449 | No | Form 4 |
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 2,451 | $85.00 | Purchase +$208,333 | 169,900 | No | Form 4 |
| Lappe MarkChief Executive Officer | Oct 14 | Oct 14 | P | 100 | $85.76 | Purchase +$8,576 | 170,000 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 28 | Sep 28 | P | 1,500 | $98.88 | Purchase +$148,320 | 737,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 28 | Sep 28 | P | 3,000 | $101.70 | Purchase +$305,100 | 740,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 25 | Sep 28 | P | 3,324 | $98.87 | Purchase +$328,644 | 733,872 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 25 | Sep 28 | P | 2,176 | $99.60 | Purchase +$216,730 | 736,048 | No | Form 4 |
| Kayyem Jon Faiz | Sep 23 | Sep 23 | P | 5,000 | $100.00 | Purchase +$500,000 | 434,360 | No | Form 4 |
| Manhard Kimberly | Jun 3 | Sep 184/A | A · derivative | 10,000 | $95.22 | $952,200 | 10,000 | No | Form 4/A |
| Forsyth Douglas | Jun 3 | Sep 184/A | A · derivative | 10,000 | $95.22 | $952,200 | 10,000 | No | Form 4/A |
| Kayyem Jon Faiz | Jun 3 | Sep 184/A | A · derivative | 10,000 | $95.22 | $952,200 | 10,000 | No | Form 4/A |
| Vuori Kristiina MD | Jun 3 | Sep 184/A | A · derivative | 10,000 | $95.22 | $952,200 | 10,000 | No | Form 4/A |
| Kayyem Jon Faiz | Sep 16 | Sep 17 | P | 5,000 | $100.00 | Purchase +$500,000 | 429,360 | No | Form 4 |
| Manhard Kimberly | Sep 15 | Sep 15 | S | 500 | $105.05 | Sale −$52,525 | 7,500 | No | Form 4 |
| Manhard Kimberly | Sep 14 | Sep 15 | S | 500 | $110.26 | Sale −$55,130 | 8,000 | No | Form 4 |
| Manhard Kimberly | Sep 11 | Sep 15 | S | 500 | $111.78 | Sale −$55,890 | 8,500 | No | Form 4 |
| Manhard Kimberly | Sep 9 | Sep 10 | S | 500 | $115.80 | Sale −$57,900 | 9,000 | No | Form 4 |
| Manhard Kimberly | Sep 8 | Sep 10 | S | 500 | $115.14 | Sale −$57,570 | 9,500 | No | Form 4 |
| Forsyth Douglas | Sep 8 | Sep 8 | P | 2,500 | $114.65 | Purchase +$286,625 | 227,064 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 5,895 | $99.29 | Purchase +$585,315 | 711,443 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 6,605 | $100.64 | Purchase +$664,727 | 718,048 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 1,100 | $107.12 | Purchase +$117,832 | 719,148 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 500 | $108.24 | Purchase +$54,120 | 719,648 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 1,219 | $111.88 | Purchase +$136,382 | 720,867 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 8 | Sep 8 | P | 9,681 | $112.28 | Purchase +$1,086,983 | 730,548 | No | Form 4 |
| Kayyem Jon Faiz | Sep 8 | Sep 8 | P | 5,000 | $113.52 | Purchase +$567,600 | 424,360 | No | Form 4 |
| Matly DavidPresident | Apr 24 | Apr 27 | A · derivative | 50,000 | $129.06 | $6,453,000 | 50,000 | No | Form 4 |
| Viking Global Opportunities Parent GP LLC | Oct 7, 2025 | Oct 9, 2025 | S | 308,643 | $32.25 | Sale −$9,953,737 | 1,267,823 | No | Form 4 |
| Viking Global Opportunities Parent GP LLC | Oct 7, 2025 | Oct 9, 2025 | S | 16,315 | $32.25 | Sale −$526,159 | 67,018 | No | Form 4 |
| Viking Global Opportunities Parent GP LLC | Oct 7, 2025 | Oct 9, 2025 | S | 25,042 | $32.25 | Sale −$807,605 | 102,864 | No | Form 4 |
| Forsyth Douglas | May 28, 2025 | May 29, 2025 | A · derivative | 15,000 | $12.91 | $193,650 | 15,000 | No | Form 4 |
| Kayyem Jon Faiz | May 28, 2025 | May 29, 2025 | A · derivative | 15,000 | $12.91 | $193,650 | 15,000 | No | Form 4 |
| Vuori Kristiina MD | May 28, 2025 | May 29, 2025 | A · derivative | 15,000 | $12.91 | $193,650 | 15,000 | No | Form 4 |
| Manhard Kimberly | May 28, 2025 | May 29, 2025 | A · derivative | 15,000 | $12.91 | $193,650 | 15,000 | No | Form 4 |
| Matly DavidPresident | Apr 1, 2025 | Apr 2, 2025 | A · derivative | 50,000 | $14.05 | $702,500 | 50,000 | No | Form 4 |
| Deck KellyChief Financial Officer | Apr 1, 2025 | Apr 2, 2025 | A · derivative | 15,000 | $14.05 | $210,750 | 15,000 | No | Form 4 |
| Kayyem Jon Faiz | Mar 27, 2025 | Mar 28, 2025 | G | 90,000 | $0.00 | $0 | 419,360 | No | Form 4 |
| Kayyem Jon Faiz | Dec 16, 2024 | Dec 17, 2024 | G | 500,000 | $0.00 | $0 | 509,360 | No | Form 4 |
| Kayyem Jon Faiz | Dec 16, 2024 | Dec 17, 2024 | G | 250,000 | $0.00 | $0 | 250,000 | No | Form 4 |
| Kayyem Jon Faiz | Dec 16, 2024 | Dec 17, 2024 | G | 250,000 | $0.00 | $0 | 250,000 | No | Form 4 |
| Kayyem Jon Faiz | Dec 6, 2024 | Dec 6, 2024 | G | 52,000 | $0.00 | $0 | 1,009,360 | No | Form 4 |
| Kayyem Jon Faiz | Nov 20, 2024 | Nov 22, 2024 | P | 18,750 | $14.19 | Purchase +$266,063 | 69,843 | No | Form 4 |
| Kayyem Jon Faiz | Nov 20, 2024 | Nov 22, 2024 | P | 18,750 | $14.19 | Purchase +$266,063 | 69,843 | No | Form 4 |
| Kayyem Jon Faiz | Nov 19, 2024 | Nov 22, 2024 | P | 34,843 | $14.23 | Purchase +$495,816 | 51,093 | No | Form 4 |
| Kayyem Jon Faiz | Nov 19, 2024 | Nov 22, 2024 | P | 34,843 | $14.23 | Purchase +$495,816 | 51,093 | No | Form 4 |
| Vuori Kristiina MD | Oct 3, 2024 | Oct 7, 2024 | P | 6,667 | $15.00 | Purchase +$100,005 | 20,443 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 16, 2024 | Sep 16, 2024 | P | 13,037 | $17.13 | Purchase +$223,324 | 705,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 12, 2024 | Sep 16, 2024 | P | 26,963 | $15.05 | Purchase +$405,793 | 692,511 | No | Form 4 |
| Vuori Kristiina MD | Sep 11, 2024 | Sep 12, 2024 | P | 6,457 | $15.07 | Purchase +$97,307 | 13,776 | No | Form 4 |
| Vuori Kristiina MD | Sep 10, 2024 | Sep 12, 2024 | P | 179 | $15.00 | Purchase +$2,685 | 7,319 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 10, 2024 | Sep 10, 2024 | P | 8,500 | $15.19 | Purchase +$129,115 | 665,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 9, 2024 | Sep 10, 2024 | P | 9,500 | $15.21 | Purchase +$144,495 | 657,048 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 6, 2024 | Sep 10, 2024 | P | 26,000 | $15.29 | Purchase +$397,540 | 647,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 3, 2024 | Sep 3, 2024 | P | 15,288 | $15.66 | Purchase +$239,410 | 160,288 | No | Form 4 |
| Lappe MarkChief Executive Officer | Sep 3, 2024 | Sep 3, 2024 | P | 4,712 | $16.31 | Purchase +$76,853 | 165,000 | No | Form 4 |
| Lappe MarkChief Executive Officer | Aug 30, 2024 | Sep 3, 2024 | P | 10,000 | $14.02 | Purchase +$140,200 | 145,000 | No | Form 4 |
| Vuori Kristiina MD | Aug 29, 2024 | Sep 3, 2024 | P | 7,140 | $14.00 | Purchase +$99,960 | 7,140 | No | Form 4 |
| Lappe MarkChief Executive Officer | Aug 29, 2024 | Sep 3, 2024 | P | 10,000 | $14.03 | Purchase +$140,300 | 135,000 | No | Form 4 |
| Manhard Kimberly | Aug 28, 2024 | Aug 30, 2024 | P | 10,000 | $13.98 | Purchase +$139,800 | 10,000 | No | Form 4 |
| Forsyth Douglas | Aug 23, 2024 | Aug 26, 2024 | P | 59,812 | $14.07 | Purchase +$841,555 | 224,564 | No | Form 4 |
| Forsyth Douglas | Aug 22, 2024 | Aug 26, 2024 | P | 15,188 | $12.89 | Purchase +$195,773 | 164,752 | No | Form 4 |
| Lappe MarkChief Executive Officer | Aug 21, 2024 | Aug 22, 2024 | P | 12,945 | $12.93 | Purchase +$167,379 | 54,865 | No | Form 4 |
| Lappe MarkChief Executive Officer | Aug 20, 2024 | Aug 22, 2024 | P | 27,055 | $12.97 | Purchase +$350,903 | 41,920 | No | Form 4 |
| Kayyem Jon Faiz | Jun 24, 2024 | Jun 24, 2024 | G | 89,050 | $0.00 | $0 | 1,061,360 | No | Form 4 |
| Kayyem Jon Faiz | Jun 24, 2024 | Jun 24, 2024 | G | 10,000 | $0.00 | $0 | 16,250 | No | Form 4 |
| Kayyem Jon Faiz | Jun 24, 2024 | Jun 24, 2024 | G | 10,000 | $0.00 | $0 | 16,250 | No | Form 4 |
| Kayyem Jon Faiz | Jun 5, 2024 | Jun 7, 2024 | P | 49,284 | $17.23 | Purchase +$849,163 | 1,142,145 | No | Form 4 |
| Kayyem Jon Faiz | Jun 5, 2024 | Jun 7, 2024 | P | 8,265 | $17.89 | Purchase +$147,861 | 1,150,410 | No | Form 4 |
| Kayyem Jon Faiz | Jun 4, 2024 | Jun 4, 2024 | P | 65,337 | $17.44 | Purchase +$1,139,477 | 1,069,135 | No | Form 4 |
| Kayyem Jon Faiz | Jun 4, 2024 | Jun 4, 2024 | P | 23,726 | $18.24 | Purchase +$432,762 | 1,092,861 | No | Form 4 |
| Kayyem Jon Faiz | Jun 3, 2024 | Jun 4, 2024 | P | 46,792 | $16.61 | Purchase +$777,215 | 923,060 | No | Form 4 |
| Kayyem Jon Faiz | Jun 3, 2024 | Jun 4, 2024 | P | 80,738 | $17.90 | Purchase +$1,445,210 | 1,003,798 | No | Form 4 |
| Kayyem Jon Faiz | May 31, 2024 | Jun 4, 2024 | P | 70,193 | $16.14 | Purchase +$1,132,915 | 876,268 | No | Form 4 |
| Inhibrx, Inc. | May 29, 2024 | May 31, 2024 | J | 13,316,140 | not reported | not reported | 1,157,926 | No | Form 4 |
| Deck KellyChief Financial Officer | May 30, 2024 | May 30, 2024 | A · derivative | 175,000 | $15.86 | $2,775,500 | 175,000 | No | Form 4 |
| Eckelman Brendan P.Chief Scientific Officer | May 30, 2024 | May 30, 2024 | A · derivative | 175,000 | $15.86 | $2,775,500 | 175,000 | No | Form 4 |
| Forsyth Douglas | May 30, 2024 | May 30, 2024 | A · derivative | 30,000 | $15.86 | $475,800 | 30,000 | No | Form 4 |
| Kayyem Jon Faiz | May 30, 2024 | May 30, 2024 | A · derivative | 30,000 | $15.86 | $475,800 | 30,000 | No | Form 4 |
| Lappe MarkChief Executive Officer | May 30, 2024 | May 30, 2024 | A · derivative | 300,000 | $15.86 | $4,758,000 | 300,000 | No | Form 4 |
| Manhard Kimberly | May 30, 2024 | May 30, 2024 | A · derivative | 30,000 | $15.86 | $475,800 | 30,000 | No | Form 4 |
| Vuori Kristiina MD | May 30, 2024 | May 30, 2024 | A · derivative | 30,000 | $15.86 | $475,800 | 30,000 | No | Form 4 |
| Eckelman Brendan P.Chief Scientific Officer | May 29, 2024 | May 30, 2024 | A | 433,888 | not reported | not reported | 433,888 | No | Form 4 |
| Eckelman Brendan P.Chief Scientific Officer | May 29, 2024 | May 30, 2024 | A | 40,000 | not reported | not reported | 40,000 | No | Form 4 |
| Eckelman Brendan P.Chief Scientific Officer | May 29, 2024 | May 30, 2024 | A | 40,000 | not reported | not reported | 40,000 | No | Form 4 |
| Forsyth Douglas | May 29, 2024 | May 30, 2024 | A | 149,564 | not reported | not reported | 149,564 | No | Form 4 |
| Kayyem Jon Faiz | May 29, 2024 | May 30, 2024 | A | 806,075 | not reported | not reported | 806,075 | No | Form 4 |
| Kayyem Jon Faiz | May 29, 2024 | May 30, 2024 | A | 6,250 | not reported | not reported | 6,250 | No | Form 4 |
| Kayyem Jon Faiz | May 29, 2024 | May 30, 2024 | A | 6,250 | not reported | not reported | 6,250 | No | Form 4 |
| Lappe MarkChief Executive Officer | May 29, 2024 | May 30, 2024 | A | 621,548 | not reported | not reported | 621,548 | No | Form 4 |
| Lappe MarkChief Executive Officer | May 29, 2024 | May 30, 2024 | A | 125,000 | not reported | not reported | 125,000 | No | Form 4 |
| Lappe MarkChief Executive Officer | May 29, 2024 | May 30, 2024 | A | 14,865 | not reported | not reported | 14,865 | No | Form 4 |