[Form 4] Iridium Communications Inc. Insider Trading Activity

Rhea-AI Filing Summary

Iridium Communications Inc. director Thomas C. Canfield reported stock-based awards rather than open‑market trades. On December 31, 2025, he acquired 1,868.2 dividend equivalent rights tied to a quarterly cash dividend of $0.15 per share, credited on restricted stock units he already held. Each right is payable in one share of common stock when the related restricted stock units settle, on the same terms and vesting schedule.

On January 6, 2026, he received 14,204 restricted stock units at no cash cost, bringing his directly held common stock–equivalent position to 232,533.4 shares. These restricted stock units vest on January 6, 2027, subject to his continued service, and include 3,382 units issued in lieu of $62,500 in annual cash retainer and committee fees under the director compensation plan. He also has 36,682 shares held indirectly through the Thomas C. Canfield 2017 grantor retained annuity trust.

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^*

Canfield Thomas C

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/31/2025

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(1)	12/31/2025		A		1,868.2	A	$0	218,329.4	D
Common Stock(2)	01/06/2026		A		14,204(3)	A	$0(4)	232,533.4	D
Common Stock								36,682	I	By Thomas C. Canfield 2017 GRAT(5)

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. On December 4, 2025, the Issuer's board of directors declared a quarterly cash dividend in the amount of $0.15 per share of its common stock, payable on December 31, 2025 to stockholders of record of the common stock at the close of business on December 15, 2025 (the "Dividend"). The amount acquired in column 4 represents equivalent rights accrued as a result of the Dividend on restricted stock units with respect to the Issuer's common stock ("Original RSUs") held by the reporting person. Each dividend equivalent right entitles the reporting person to receive one share of the Issuer's common stock upon the settlement of the Original RSUs and is subject to the same terms and conditions, including vesting and settlement, as the Original RSUs to which it relates. The grant of dividend equivalent rights was approved by the Issuer's board of directors pursuant to Rule 16b-3 of the Securities Exchange Act of 1934, as amended.

2. This security represents restricted stock units. Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer.

3. The shares underlying these restricted stock units vest on January 6, 2027, subject to the reporting person's continued service with the issuer.

4. The restricted stock units were issued to the reporting person pursuant to the issuer's director compensation plan and include 3,382 restricted stock units issued in lieu of annual cash (i) board member retainer fees of $50,000, and (ii) committee member fees of $12,500.

5. These shares are owned by a grantor retained annuity trust ("GRAT"). The reporting person is the trustee and sole annuitant of the GRAT.

	/s/ Peter L. Trentman, Attorney-in-Fact	01/07/2026
	** 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).
** 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 insider activity did Iridium Communications (IRDM) report in this Form 4?

The filing shows director Thomas C. Canfield receiving stock-based awards, including 1,868.2 dividend equivalent rights credited on December 31, 2025 and 14,204 restricted stock units granted on January 6, 2026, all at a price of $0 per unit.

How many Iridium (IRDM) shares does Thomas C. Canfield beneficially own after these transactions?

After the reported grants, Thomas C. Canfield beneficially owns 232,533.4 shares of Iridium common stock on a direct basis, plus 36,682 shares held indirectly through the Thomas C. Canfield 2017 GRAT.

What are the terms of the new restricted stock units reported for IRDM?

The 14,204 restricted stock units each represent a contingent right to receive one Iridium common share. The underlying shares vest on January 6, 2027, subject to Canfield’s continued service with Iridium.

Why did Iridium issue some restricted stock units in lieu of cash fees?

According to the disclosure, the restricted stock units include 3,382 units issued instead of cash for annual director compensation, covering a $50,000 board retainer and $12,500 in committee fees under Iridium’s director compensation plan.

What are the dividend equivalent rights mentioned in the Iridium (IRDM) Form 4?

The 1,868.2 dividend equivalent rights accrued from a $0.15 per share quarterly dividend declared on December 4, 2025. Each right entitles Canfield to receive one Iridium common share when the related original restricted stock units settle, on identical vesting and settlement terms.

How are the GRAT-held Iridium (IRDM) shares reported for Thomas C. Canfield?

The filing shows 36,682 Iridium shares held indirectly by the Thomas C. Canfield 2017 grantor retained annuity trust (GRAT), for which Canfield is the trustee and sole annuitant.