Iridium (IRDM) director receives 74.1 shares from RSU dividend equivalents

Rhea-AI Filing Summary

Alterman Louis M reported acquisition or exercise transactions in this Form 4 filing.

Iridium Communications director Louis M. Alterman received 74.1 shares of common stock as a stock grant tied to dividend equivalents. These shares were credited at no purchase price in connection with a quarterly cash dividend of $0.15 per share declared on the company’s common stock.

The dividend equivalent rights accrued on previously granted restricted stock units and carry the same vesting and settlement terms as the original awards. After this grant, Alterman directly holds 13,772.1 shares of Iridium common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Alterman Louis M

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	74.1	$0.00	--

Holdings After Transaction: Common Stock — 13,772.1 shares (Direct)

Footnotes (1)

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Key Figures

Shares granted: 74.1 shares Shares held after: 13,772.1 shares Dividend amount: $0.15 per share +3 more

6 metrics

Shares granted 74.1 shares Dividend equivalent rights on restricted stock units

Shares held after 13,772.1 shares Director’s direct holdings following grant

Dividend amount $0.15 per share Quarterly cash dividend declared on common stock

Transaction code A Grant, award, or other acquisition of common stock

Transaction date March 31, 2026 Date dividend equivalent rights were reflected as acquired

Record date March 16, 2026 Stockholders of record entitled to $0.15 dividend

Key Terms

restricted stock units, dividend equivalent right, quarterly cash dividend, Rule 16b-3

4 terms

restricted stock units financial

"restricted stock units with respect to the Issuer's common stock ("Original RSUs") held by the reporting person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

dividend equivalent right financial

"Each dividend equivalent right entitles the reporting person to receive one share"

quarterly cash dividend financial

"declared a quarterly cash dividend in the amount of $0.15 per share"

A quarterly cash dividend is a payment made by a company to its shareholders four times a year, usually based on its profits. It is like a regular bonus or reward for owning the company's stock, providing shareholders with income. Many investors see these payments as a sign of the company's stability and its ability to generate consistent profits.

Rule 16b-3 regulatory

"The grant of dividend equivalent rights was approved by the Issuer's board of directors pursuant to Rule 16b-3"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Alterman Louis M

(Last) (First) (Middle)

C/O IRIDIUM COMMUNICATIONS INC.

1676 INTERNATIONAL DRIVE, SUITE 1100

(Street)

MCLEAN VIRGINIA 22102

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

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

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

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

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)	03/31/2026		A		74.1	A	$0	13,772.1	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. On March 5, 2026, 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 March 31, 2026 to stockholders of record of the common stock at the close of business on March 16, 2026 (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.

	/s/ Peter L. Trentman, Attorney-in-Fact	04/02/2026
	** 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).
** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Iridium Communications (IRDM) director Louis M. Alterman report on this Form 4?

Louis M. Alterman reported acquiring 74.1 shares of Iridium common stock at no purchase price. These shares reflect dividend equivalent rights credited on his restricted stock units following a declared quarterly cash dividend of $0.15 per share.

Was the Iridium (IRDM) Form 4 transaction an open-market purchase or sale?

The Form 4 transaction was not an open-market trade. Alterman received 74.1 shares as a grant of dividend equivalent rights linked to existing restricted stock units, with no cash price paid per share in the transaction.

How many Iridium (IRDM) shares does Louis M. Alterman hold after this transaction?

Following the reported grant, Louis M. Alterman directly holds 13,772.1 shares of Iridium common stock. This total includes the additional 74.1 shares credited as dividend equivalent rights on his outstanding restricted stock units.

What dividend triggered the Iridium (IRDM) dividend equivalent rights for Louis M. Alterman?

A quarterly cash dividend of $0.15 per share on Iridium’s common stock triggered the dividend equivalent rights. The dividend was declared for stockholders of record as of March 16, 2026 and was payable on March 31, 2026.

How do the dividend equivalent rights work for Iridium (IRDM) restricted stock units?

Each dividend equivalent right entitles the holder to receive one share of Iridium common stock when the related restricted stock units settle. These rights follow the same vesting and settlement terms as the original restricted stock unit awards.