There have been 50 recent insider transactions recorded for Inhibrx Biosciences, Inc. (INBX), including 21 buys and 25 sells. Total insider buying was valued at $15.23M and total insider selling at $18.96M.
Notable insiders with recent activity include Viking Global Investors Lp, Manhard Kimberly, Forsyth Douglas. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — INBX
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2025-10-07 |
Viking Global Investors Lp |
10 Percent Owner |
Informative Sell |
16,315 |
$32.25 |
$526.16K |
67,018 |
| 2025-05-28 |
Manhard Kimberly |
Director |
RSU Award |
15,000 |
$12.91 |
$193.65K |
15,000 |
| 2025-05-28 |
Forsyth Douglas |
Director |
RSU Award |
15,000 |
$12.91 |
$193.65K |
15,000 |
| 2025-05-28 |
Kayyem Jon Faiz |
Director |
RSU Award |
15,000 |
$12.91 |
$193.65K |
15,000 |
| 2025-05-28 |
Vuori Kristiina Md |
Director |
RSU Award |
15,000 |
$12.91 |
$193.65K |
15,000 |
| 2025-04-01 |
Deck Kelly |
Chief Financial Officer |
RSU Award |
15,000 |
$14.05 |
$210.75K |
15,000 |
| 2025-04-01 |
Matly David |
President |
Unknown |
175,000 |
$15.86 |
$2.78M |
- |
| 2025-04-01 |
Matly David |
President |
RSU Award |
50,000 |
$14.05 |
$702.5K |
50,000 |
| 2025-03-27 |
Kayyem Jon Faiz |
Director |
Gift (Given) |
90,000 |
- |
- |
419,360 |
| 2024-12-16 |
Kayyem Jon Faiz |
Director |
Gift (Received) |
250,000 |
- |
- |
250,000 |
| 2024-12-06 |
Kayyem Jon Faiz |
Director |
Gift (Given) |
52,000 |
- |
- |
1,009,360 |
| 2024-11-20 |
Kayyem Jon Faiz |
Director |
Informative Buy |
18,750 |
$14.19 |
$266.1K |
69,843 |
| 2024-11-19 |
Kayyem Jon Faiz |
Director |
Informative Buy |
34,843 |
$14.23 |
$495.71K |
51,093 |
| 2024-10-03 |
Vuori Kristiina Md |
Director |
Informative Buy |
6,667 |
$15.00 |
$100.01K |
20,443 |
| 2024-09-16 |
Lappe Mark |
Chief Executive Officer |
Informative Buy |
13,037 |
$17.13 |
$223.32K |
705,548 |
| 2024-09-12 |
Lappe Mark |
Chief Executive Officer |
Informative Buy |
26,963 |
$15.05 |
$405.79K |
692,511 |
| 2024-09-11 |
Vuori Kristiina Md |
Director |
Informative Buy |
6,457 |
$15.07 |
$97.31K |
13,776 |
| 2024-09-10 |
Lappe Mark |
Chief Executive Officer |
Informative Buy |
8,500 |
$15.19 |
$129.12K |
665,548 |
| 2024-09-10 |
Vuori Kristiina Md |
Director |
Informative Buy |
179 |
$15.00 |
$2.69K |
7,319 |
| 2024-09-09 |
Lappe Mark |
Chief Executive Officer |
Informative Buy |
9,500 |
$15.21 |
$144.5K |
657,048 |
| 2024-09-06 |
Lappe Mark |
Chief Executive Officer |
Informative Buy |
26,000 |
$15.29 |
$397.54K |
647,548 |
| 2024-05-30 |
Manhard Kimberly |
Director |
Return of Shares |
17,259 |
$20.43 |
$352.6K |
- |
| 2024-05-30 |
Forsyth Douglas |
Director |
Return of Shares |
15,000 |
$24.78 |
$371.7K |
- |
| 2024-05-30 |
Lappe Mark |
Chief Executive Officer |
Return of Shares |
59,462 |
$30.00 |
$1.78M |
- |
| 2024-05-30 |
Kayyem Jon Faiz |
Director |
Return of Shares |
15,000 |
$24.78 |
$371.7K |
- |
| 2024-05-30 |
Vuori Kristiina Md |
Director |
Return of Shares |
15,000 |
$12.57 |
$188.55K |
- |
| 2024-05-30 |
Eckelman Brendan P. |
Chief Scientific Officer |
Return of Shares |
6,667 |
$33.63 |
$224.21K |
- |
| 2024-05-30 |
Deck Kelly |
Chief Financial Officer |
Return of Shares |
21,250 |
$23.30 |
$495.13K |
- |
| 2024-05-30 |
Viking Global Investors Lp |
10 Percent Owner |
Other (Sell) |
1,038,765 |
$0.00 |
$103.88 |
- |
| 2024-05-29 |
Inhibrx, Inc. |
10 Percent Owner |
Other (Sell) |
13,316,140 |
- |
- |
1,157,926 |
| 2024-05-28 |
Eckelman Brendan P. |
Chief Scientific Officer |
Informative Sell |
300,000 |
$34.30 |
$10.29M |
1,735,553 |
| 2024-05-22 |
Eckelman Brendan P. |
Chief Scientific Officer |
Option Exercise (Sell) |
2,510 |
$33.63 |
$84.41K |
6,667 |
| 2024-05-06 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
2,087 |
$11.25 |
$23.48K |
- |
| 2024-03-26 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
416 |
$34.16 |
$14.21K |
9,167 |
| 2024-03-22 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
110 |
$10.52 |
$1.16K |
18,020 |
| 2024-03-21 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
3,113 |
$10.52 |
$32.75K |
18,130 |
| 2024-03-20 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
16,777 |
$10.52 |
$176.49K |
21,243 |
| 2024-03-13 |
Eckelman Brendan P. |
Chief Scientific Officer |
Option Exercise (Sell) |
1,898 |
$33.63 |
$63.83K |
9,177 |
| 2024-03-13 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
32,431 |
$11.25 |
$364.85K |
2,087 |
| 2024-03-12 |
Eckelman Brendan P. |
Chief Scientific Officer |
Option Exercise (Sell) |
19,898 |
$33.63 |
$669.17K |
11,075 |
| 2024-03-11 |
Eckelman Brendan P. |
Chief Scientific Officer |
Option Exercise (Sell) |
6,877 |
$33.63 |
$231.27K |
30,973 |
| 2024-03-08 |
Eckelman Brendan P. |
Chief Scientific Officer |
Option Exercise (Sell) |
2,150 |
$33.63 |
$72.3K |
37,850 |
| 2024-03-08 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
42,523 |
$10.52 |
$447.34K |
38,020 |
| 2024-03-05 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
10,417 |
$34.16 |
$355.84K |
9,583 |
| 2024-03-04 |
Deck Kelly |
Chief Financial Officer |
Option Exercise (Sell) |
53,958 |
$33.63 |
$1.81M |
16,042 |
| 2023-08-28 |
Viking Global Investors Lp |
10 Percent Owner |
Informative Buy |
511,627 |
$19.35 |
$9.9M |
511,627 |
| 2023-05-25 |
Manhard Kimberly |
Director |
RSU Award |
15,000 |
$23.03 |
$345.45K |
15,000 |
| 2023-05-25 |
Forsyth Douglas |
Director |
RSU Award |
15,000 |
$23.03 |
$345.45K |
15,000 |
| 2023-05-25 |
Kayyem Jon Faiz |
Director |
RSU Award |
15,000 |
$23.03 |
$345.45K |
15,000 |
| 2023-05-25 |
Vuori Kristiina Md |
Director |
RSU Award |
15,000 |
$23.03 |
$345.45K |
15,000 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
