Iridium (IRDM) insider withholding 846 shares for taxes after RSU vesting

Rhea-AI Filing Summary

Timothy James, listed as an officer (EVP, Sales & Marketing) and director, reported a transaction in Iridium Communications Inc. (IRDM) dated 09/01/2025. The filing shows 846 shares of common stock were disposed of under transaction code F(1) at a price of $24.89, leaving the reporting person with 51,099 shares beneficially owned, held directly. The filing explains the shares were withheld by the issuer to satisfy the reporting person’s tax withholding obligations in connection with the vesting and settlement of restricted stock units. The Form 4 was signed by an attorney-in-fact on 09/02/2025.

Insights

Securities Analyst

TL;DR Insider withheld 846 shares to cover taxes on RSU settlement; routine, not an open-market sale.

This Form 4 documents a withholding disposition under code F(1), which indicates the company retained shares to satisfy tax withholding obligations upon RSU vesting. The quantity disposed (846 shares) is small relative to total beneficial ownership (51,099 shares remaining). No new options, grants, or open-market trades are reported, and no change to derivative positions appears in the filing. This is a standard administrative transaction and does not on its face indicate a change in confidence by management.

Corporate Governance Expert

TL;DR Administrative tax-withholding event documented; disclosure meets Section 16 reporting requirements.

The filing provides the necessary Section 16 disclosure for a non-derivative disposal under an RSU settlement. The explanatory note explicitly states the withholding purpose, which clarifies the nature of the disposition for investors and regulators. Signature by an attorney-in-fact and timely reporting (transaction 09/01/2025, filing signed 09/02/2025) demonstrates procedural compliance with reporting rules.

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^*

Last Timothy 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)
	EVP, Sales & Marketing

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2025

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	09/01/2025		F(1)		846	D	$24.89	51,099	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. The transaction reported represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the non-reportable vesting and settlement of restricted stock units.

	/s/ Patrick McClain, Attorney-in-Fact	09/02/2025
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did IRDM insider Timothy James report on Form 4?

The filing reports the disposition of 846 shares of Iridium common stock on 09/01/2025 at $24.89, with 51,099 shares remaining beneficially owned.

Why were the 846 shares disposed by the reporting person?

The form states the shares were withheld by the issuer to satisfy tax withholding obligations in connection with the vesting and settlement of restricted stock units.

What does transaction code F(1) mean on this Form 4 for IRDM?

In this filing, code F(1) corresponds to a withholding disposition related to tax obligations on vested equity awards as explained in the filed explanation.

How and when was the Form 4 signed for the IRDM transaction?

The Form 4 was signed by Patrick McClain, Attorney-in-Fact on 09/02/2025.

Did this Form 4 report any derivative transactions or new option grants for IRDM?

No. The filing contains no entries in the derivative securities table and reports only the non-derivative withholding disposition.