Iridium Communications (IRDM) COO has stock withheld to cover RSU taxes

Rhea-AI Filing Summary

Iridium Communications Inc. Chief Operations Officer Suzanne E. McBride reported a routine tax-related share withholding. On June 1, 2026, the issuer withheld 3,622 shares of common stock at $51.78 per share to cover her tax obligations from vesting restricted stock units. After this non-market transaction, she directly holds 367,471 shares of common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider McBride Suzanne E.

Role Chief Operations Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	3,622	$51.78	$188K

Holdings After Transaction: Common Stock — 367,471 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares withheld for taxes: 3,622 shares Withholding price: $51.78 per share Shares held after transaction: 367,471 shares

3 metrics

Shares withheld for taxes 3,622 shares Tax withholding on RSU vesting, June 1, 2026

Withholding price $51.78 per share Value used for tax-withholding shares

Shares held after transaction 367,471 shares Direct common stock ownership after tax withholding

Key Terms

restricted stock units, tax withholding obligations, Common Stock, tax-withholding disposition

4 terms

restricted stock units financial

"in connection with the non-reportable vesting and settlement of restricted stock units"

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.

tax withholding obligations financial

"to satisfy the reporting person's tax withholding obligations in connection with the non-reportable vesting"

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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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^*

McBride Suzanne E.

(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
X	Officer (give title below)		Other (specify below)
	Chief Operations Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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	06/01/2026		F(1)		3,622	D	$51.78	367,471	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/ Peter L. Trentman, Attorney-in-Fact	06/02/2026
	** 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 insider transaction did Iridium Communications (IRDM) report for Suzanne McBride?

Iridium disclosed that COO Suzanne McBride had 3,622 common shares withheld by the company to cover tax obligations from vested restricted stock units. This was a non-market, tax-withholding disposition, not an open-market purchase or sale of shares.

Was the Iridium (IRDM) Form 4 transaction an open-market sale of stock?

No, the Form 4 shows no open-market sale. The 3,622 shares were withheld by Iridium to satisfy Suzanne McBride’s tax withholding obligations from RSU vesting, meaning she did not actively sell shares into the market.

How many Iridium (IRDM) shares were involved in Suzanne McBride’s tax withholding?

The filing reports that 3,622 shares of Iridium common stock were withheld at a price of $51.78 per share. This withholding settled tax obligations arising from the vesting and settlement of restricted stock units granted to her.

How many Iridium (IRDM) shares does Suzanne McBride hold after this Form 4 transaction?

After the reported tax-withholding transaction, Suzanne McBride directly holds 367,471 shares of Iridium common stock. This figure reflects her position following the non-reportable vesting and share withholding event related to her restricted stock units.

What does the F transaction code mean in the Iridium (IRDM) Form 4 filing?

The F code indicates shares used to pay taxes or exercise costs rather than a market sale. In this case, Iridium withheld 3,622 shares from Suzanne McBride to satisfy tax withholding obligations from restricted stock units vesting.