Louis M. Alterman

CIK: 0001623397

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)5 (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)

IRDM

Iridium Communications Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (5 total)

IRDM
Iridium Communications Inc.
Sep 30, 2026
Award(A)
Direct
43 shares-
IRDM
Iridium Communications Inc.
Jun 30, 2026
Award(A)
Direct
38 shares-
IRDM
Iridium Communications Inc.
Mar 31, 2026
Award(A)
Direct
74 shares-
IRDM
Iridium Communications Inc.
Jan 6, 2026
Award(A)
Direct
10.8K shares-
IRDM
Iridium Communications Inc.
Dec 31, 2025
Award(A)
Direct
2.9K shares-

		Type	Shares	Price		Ownership
Sep 30, 2026	IRDM Iridium Communications Inc.	Award(A)	43	-	$0	Direct
Jun 30, 2026	IRDM Iridium Communications Inc.	Award(A)	38	-	$0	Direct
Mar 31, 2026	IRDM Iridium Communications Inc.	Award(A)	74	-	$0	Direct
Jan 6, 2026	IRDM Iridium Communications Inc.	Award(A)	10,822	-	$0	Direct
Dec 31, 2025	IRDM Iridium Communications Inc.	Award(A)	2,876	-	$0	Direct

1-5 of 5 transactions

About Alterman Louis M

Alterman Louis M (SEC CIK 0001623397) files insider reports with the SEC as Director of Iridium Communications Inc. (IRDM).

Signal8 holds 6 ownership filings by Alterman Louis M (1 Form 3, 5 Form 4), filed between Dec 4, 2025 and Oct 2, 2026. Those filings report 5 transactions, from Dec 31, 2025 to Sep 30, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Alterman Louis M's filings is in MCLEAN, VA.

Recent filings by Alterman Louis M

Sep 30, 2026: Grant or award of IRDM shares (Form 4, code A).
Jun 30, 2026: Grant or award of IRDM shares (Form 4, code A).
Mar 31, 2026: Grant or award of IRDM shares (Form 4, code A).
Jan 6, 2026: Grant or award of IRDM shares (Form 4, code A).
Dec 31, 2025: Grant or award of IRDM shares (Form 4, code A).

Other insiders filing for Iridium Communications Inc. (IRDM)

DESCH MATTHEW J, Chief Executive Officer
FRAZIER LEON ANTHONY, Director
YEANEY JACQUELINE E, Director
Sears Kay, Director
Shivanandan Monique S., Director
NIEHAUS ROBERT H, Director

How to read Form 4 transaction codes