Iridium Communications (NASDAQ: IRDM) CFO reports RSU awards and tax withholding

Rhea-AI Filing Summary

Iridium Communications Inc. Chief Financial Officer Vincent James O'Neill reported stock-based compensation activity in the form of restricted stock units (RSUs) and related tax withholding.

On March 1, 2026, he acquired 83,507 shares of common stock at no cost through a grant, and the filing notes RSUs certified as earned under the issuer's 2025 bonus plan that will vest on March 9, 2026, subject to continued service. A separate RSU award provides that 20% vests on March 1, 2027, with the remainder vesting quarterly until fully vested by March 1, 2031, also subject to continued service.

The filing also shows a 3,658‑share tax-withholding disposition on March 1, 2026 at $22.49 per share, where shares were withheld by the company to cover tax obligations, rather than sold in the open market. On February 26, 2026, he received an additional 5,066 shares via a grant at no cost. After these transactions, his directly held common stock balance reported in the filing is 132,378 shares.

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^*

O'Neill Vincent James

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial 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		5,066(1)	A	$0	52,529	D
Common Stock	03/01/2026		A		83,507(2)	A	$0	136,036	D
Common Stock	03/01/2026		F(3)		3,658	D	$22.49	132,378	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. 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.

3. 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.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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FAQ

What insider transactions did Iridium Communications (IRDM) report for its CFO?

Iridium’s CFO Vincent James O'Neill reported RSU-related acquisitions and a tax withholding. He received stock grants at no cost and had shares withheld by the company to cover tax obligations, rather than selling shares in the open market.

How many Iridium (IRDM) shares were granted to the CFO in this Form 4?

The Form 4 shows grants of 83,507 and 5,066 shares of Iridium common stock at no cost. These reflect RSU-related awards, with vesting tied to continued service over specified future dates and schedules described in the footnotes.

Why were 3,658 Iridium (IRDM) shares disposed of in the CFO’s Form 4?

The 3,658-share disposition reflects tax withholding, not an open-market sale. The company withheld these shares at $22.49 per share to satisfy Vincent James O'Neill’s tax obligations arising from his stock-based compensation awards.

What are the key vesting terms for the Iridium (IRDM) RSUs reported?

One RSU award tied to the 2025 bonus plan vests on March 9, 2026, if service continues. Another RSU award vests 20% on March 1, 2027, with remaining shares vesting quarterly until fully vested by March 1, 2031, subject to continued service.

How many Iridium (IRDM) shares does the CFO own after these transactions?

After the reported Form 4 transactions, Vincent James O'Neill directly holds 132,378 shares of Iridium common stock. This figure reflects his ownership following the RSU-related grants and the 3,658-share tax-withholding disposition.

Are the Iridium (IRDM) CFO’s Form 4 transactions open-market buys or sells?

No, the transactions are stock-based compensation and tax withholding events. The grants represent RSU-related share acquisitions at no cost, while the 3,658-share disposition is the issuer withholding shares to cover taxes, not a market sale.