Iridium (IRDM) CEO logs large RSU, PSU grants and tax share withholding

Rhea-AI Filing Summary

Iridium Communications CEO Matthew J. Desch reported multiple equity award transactions in Iridium Communications Inc. common stock. On February 26, 2026, he acquired a total of 115,289 shares through stock awards coded as grants or other acquisitions.

On March 1, 2026, he acquired an additional 292,275 shares tied to restricted and performance-based stock units, and 53,301 shares were withheld by the company at $22.49 per share to cover tax obligations. Several awards are subject to future vesting through March 1, 2031, contingent on his continued service.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DESCH MATTHEW J

(Last) (First) (Middle)

C/O IRIDIUM COMMUNICATIONS INC.

1750 TYSONS BOULEVARD, SUITE 1400

(Street)

MCLEAN VA 22102

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Iridium Communications Inc. [ IRDM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF EXECUTIVE OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/26/2026		A		19,396(1)	A	$0	1,134,480	D
Common Stock	02/26/2026		A		95,893(2)	A	$0	1,230,373	D
Common Stock	03/01/2026		A		292,275(3)	A	$0	1,522,648	D
Common Stock	03/01/2026		F(4)		53,301	D	$22.49	1,469,347	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Reflects the number of restricted stock units ("RSUs") certified as earned with respect to an award under the issuer's 2025 bonus plan granted on March 1, 2025. Each RSU represents a contingent right to receive one share of common stock of the issuer. The shares will vest on March 9, 2026, subject to the reporting person's continuous service with the issuer as of the vesting date.

2. Reflects the number of shares certified as earned with respect to an award of performance-based RSUs ("PSUs") granted on March 1, 2024. One half of the PSUs settled on March 1, 2026 and the remaining PSUs will vest and be settled on March 1, 2027.

3. These shares are represented by RSUs. Each RSU represents a contingent right to receive one share of common stock of the issuer. Of the shares underlying this RSU award, 20% shall vest on March 1, 2027 and the remainder shall vest in equal quarterly installments thereafter on each June 1, September 1, December 1 and March 1, so that all shares of common stock shall be vested as of March 1, 2031, subject to the reporting person's continuous service with the issuer as of each such vesting date.

4. The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations.

	/s/ Peter L. Trentman, Attorney-in-Fact	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What did Iridium Communications (IRDM) CEO report in this Form 4?

The CEO reported several equity award transactions, acquiring common stock through grants and performance-based units. The filing also shows a share disposition where Iridium withheld shares to satisfy his tax obligations related to these awards.

How many Iridium (IRDM) shares were acquired through awards in this Form 4?

The Form 4 shows awards totaling 115,289 shares on February 26, 2026, and 292,275 shares on March 1, 2026. These were coded as grants or award acquisitions of Iridium common stock rather than open-market purchases.

What does the tax-withholding transaction in Iridium (IRDM) Form 4 mean?

The filing reports 53,301 shares disposed at $22.49 per share on March 1, 2026. A footnote explains Iridium withheld these shares to cover the CEO’s tax withholding obligations, not as an open-market sale to third parties.

How do the RSUs and PSUs for Iridium (IRDM) CEO vest over time?

Some units were certified as earned under a 2025 bonus plan, while performance-based units partly settled on March 1, 2026. Another RSU award vests 20% on March 1, 2027, with the remainder vesting quarterly until March 1, 2031, contingent on continued service.

Are the Iridium (IRDM) CEO’s equity awards tied to performance?

Yes, part of the reported equity relates to performance-based restricted stock units granted on March 1, 2024. A footnote states that one half settled on March 1, 2026, and the remaining portion will vest and settle on March 1, 2027, based on certified results.

Does the Iridium (IRDM) CEO pay cash for these Form 4 share acquisitions?

No cash price is listed for the grant transactions, which are coded as award or other acquisitions. Instead, the company granted restricted and performance-based stock units, with a separate share withholding transaction covering the related tax obligations.