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Inhibrx Biosciences, Inc.

INBX Net buying
CIK 0002007919 #2266 in the set updated 17 Sep 2026
Bought (120 mo)
$14.84M
out of their own pocket, the only kind of buying there is
Sold (120 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
+$3.27M
+$3.27M against sales at will

By person

8 insiders · 45 transactions
250×

Mark P. Lappe holds 250 times base salary in stock. $173.96M 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 $105.05, the price Common Stock was last bought or sold at on the open market here, on 15 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%
$10.81M
−77.3%
Kayyem Jon Faiz
Director
$8.02M (12)
—
+$8.02M
1,483,406
10.08%
$155.83M
+253.7%
Lappe Mark
Chief Executive Officer
$5.06M (17)
—
+$5.06M
1,655,961
11.25%
$173.96M
+134.7%
FORSYTH DOUGLAS
Director
$1.32M (3)
—
+$1.32M
451,628
3.07%
$47.44M
+101.1%
Vuori Kristiina MD
Director
$299.96K (4)
—
+$299.96K
20,443
0.1389%
$2.15M
—
MANHARD KIMBERLY
Director
$139.80K (1)
$279.01K (5)
−$139.21K
17,500
0.1189%
$1.84M
+75.0%
Inhibrx, Inc. entity
10% owner
—
—
—
1,157,926
7.87%
$121.64M
−92.0%
Eckelman Brendan P.
Chief Scientific Officer
—
—
—
40,000
0.2718%
$4.20M
—

Individual transactions

8
Insider
Date
Role
Action
Shares
Price
Amount
MANHARD KIMBERLY
15 Sep 2026
Director
Sell indirect
500
$105.05
$52.53K
MANHARD KIMBERLY
14 Sep 2026
Director
Sell indirect
500
$110.26
$55.13K
MANHARD KIMBERLY
11 Sep 2026
Director
Sell indirect
500
$111.78
$55.89K
MANHARD KIMBERLY
9 Sep 2026
Director
Sell indirect
500
$115.80
$57.90K
MANHARD KIMBERLY
8 Sep 2026
Director
Sell indirect
500
$115.14
$57.57K
VIKING GLOBAL INVESTORS LP
7 Oct 2025
10% owner
Sell indirect
25,042
$32.25
$807.60K
VIKING GLOBAL INVESTORS LP
7 Oct 2025
10% owner
Sell indirect
16,315
$32.25
$526.16K
VIKING GLOBAL INVESTORS LP
7 Oct 2025
10% owner
Sell indirect
308,643
$32.25
$9.95M
Show all 45 transactions →

What was left out

Form 4 filings counted 41
Amendments (4/A) skipped 0
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 16,810,630
History held since 30 May 2024