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Inhibrx Biosciences, Inc.

INBX Net selling

CIK 0002007919 #2266 in the set updated 22 Sep 2026

Bought (12 mo)

$4.00M

out of their own pocket, the only kind of buying there is

Sold (12 mo)

$11.57M

$0.00 on a plan · $0.00 straight out of an exercise

Sold at will

$11.57M

8 of 8 sales

Net

−$7.57M

−$7.57M against sales at will

By person

6 insiders · 17 transactions

136×

Mark P. Lappe holds 136 times base salary in stock. $95.04M of shares against $695.25K in salary for 2025.

Salary from the company's own proxy. The shares are what Mark P. Lappe last reported holding, valued at $100.00, the price Common Stock was last bought or sold at on the open market here, on 16 Sep 2026.

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

VIKING GLOBAL INVESTORS LP entity

10% owner

—

$11.29M (3)

−$11.29M

102,864

0.6989%

$10.29M

−77.3%

Lappe Mark

Chief Executive Officer

$2.65M (6)

—

+$2.65M

950,413

6.46%

$95.04M

+2.7%

Kayyem Jon Faiz

Director

$1.07M (2)

—

+$1.07M

1,488,406

10.11%

$148.84M

−1.6%

FORSYTH DOUGLAS

Director

$286.62K (1)

—

+$286.62K

227,064

1.54%

$22.71M

+1.1%

MANHARD KIMBERLY

Director

—

$279.01K (5)

−$279.01K

7,500

0.0510%

$750.00K

−25.0%

Vuori Kristiina MD

Director

—

20,443

0.1389%

$2.04M

+48.4%

Individual transactions

Nothing of that kind in this period.

What was left out

Form 4 filings counted 12

Amendments (4/A) skipped 4

Filings about a different issuer 0

Unreadable filings 0

Joint filings 1

Sales on a Rule 10b5-1 plan 0

Sales straight out of an exercise 0

Sales at will 8

Transactions with no price 0

Shares from compensation/vesting 0

History held since 30 May 2024