Douglas Forsyth

CIK: 0001240801

Transaction Breakdown

Open Market Buys (P)1 (33.3%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (66.7%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

INBX

Inhibrx Biosciences, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (3 total)

INBX
Inhibrx Biosciences, Inc.
Sep 8, 2026
Purchase(P)
Indirect
2.5K shares at avg. $114.65$287K
INBX
Inhibrx Biosciences, Inc.
Jun 3, 2026
Award(A)
Stock Option (right to buy)
Direct
10K shares-
INBX
Inhibrx Biosciences, Inc.
May 28, 2025
Award(A)
Stock Option (right to buy)
Direct
15K shares-

		Type	Shares	Price		Ownership
Sep 8, 2026	INBX Inhibrx Biosciences, Inc.	Purchase(P)	2,500	$114.65	$286,617	Indirect
Jun 3, 2026	INBX Inhibrx Biosciences, Inc.	Award(A) Stock Option (right to buy)	10,000	-	-	Direct
May 28, 2025	INBX Inhibrx Biosciences, Inc.	Award(A) Stock Option (right to buy)	15,000	-	-	Direct

1-3 of 3 transactions

About FORSYTH DOUGLAS

FORSYTH DOUGLAS (SEC CIK 0001240801) files insider reports with the SEC as Director of Inhibrx Biosciences, Inc. (INBX).

Signal8 holds 4 ownership filings by FORSYTH DOUGLAS, all Form 4s, filed between May 29, 2025 and Sep 18, 2026. Those filings report 3 transactions, from May 28, 2025 to Sep 8, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on FORSYTH DOUGLAS's filings is in LA JOLLA, CA.

Recent filings by FORSYTH DOUGLAS

Sep 8, 2026: Open-market purchase of INBX shares (Form 4, code P).
Jun 3, 2026: Grant or award of INBX derivative securities (Form 4, code A).
May 28, 2025: Grant or award of INBX derivative securities (Form 4, code A).

Other insiders filing for Inhibrx Biosciences, Inc. (INBX)

Lappe Mark, Chief Executive Officer
Kayyem Jon Faiz, Director
Vuori Kristiina MD, Director
MANHARD KIMBERLY, Director
Matly David, President
VIKING GLOBAL INVESTORS LP, 10% Owner

How to read Form 4 transaction codes