Walter Marc Hertz

CIK: 0001971132

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)3 (100.0%)

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)

GRI

GRI Bio, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (3 total)

GRI
GRI Bio, Inc.
Sep 18, 2025
Award(A)
Stock Option (Right to Buy)
Direct
103.1K shares-
GRI
GRI Bio, Inc.
Aug 26, 2025
Award(A)
Stock Option (Right to Buy)
Direct
26.7K shares-
GRI
GRI Bio, Inc.
Jan 23, 2025
Award(A)
Stock Option (Right to Buy)
Direct
129.7K shares at avg. $0.69-

		Type	Shares	Price		Ownership
Sep 18, 2025	GRI GRI Bio, Inc.	Award(A) Stock Option (Right to Buy)	103,067	-	-	Direct
Aug 26, 2025	GRI GRI Bio, Inc.	Award(A) Stock Option (Right to Buy)	26,688	-	-	Direct
Jan 23, 2025	GRI GRI Bio, Inc.	Award(A) Stock Option (Right to Buy)	129,730	$0.69	-	Direct

1-3 of 3 transactions

About Hertz Walter Marc

Hertz Walter Marc (SEC CIK 0001971132) files insider reports with the SEC as Chief Executive Officer of GRI Bio, Inc. (GRI).

Signal8 holds 3 ownership filings by Hertz Walter Marc, all Form 4s, filed between Jan 24, 2025 and Sep 22, 2025. Those filings report 3 transactions, from Jan 23, 2025 to Sep 18, 2025. Signal8's Form 4 history starts in Sep 2024.

The business address on Hertz Walter Marc's filings is in LA JOLLA, CA.

Recent filings by Hertz Walter Marc

Sep 18, 2025: Grant or award of GRI derivative securities (Form 4, code A).
Aug 26, 2025: Grant or award of GRI derivative securities (Form 4, code A).
Jan 23, 2025: Grant or award of GRI derivative securities (Form 4, code A).

Other insiders filing for GRI Bio, Inc. (GRI)

Kelly Leanne, Chief Financial Officer
Szekeres David Leslie, Director
Baker David Charles, Director
SIMPSON CAMILLA V, Director
Chaturvedi Vipin, Chief Scientific Officer
Rongen Roelof, Director

How to read Form 4 transaction codes