Iridium EVP has 1,501 shares withheld for taxes

Iridium EVP for Sales & Marketing had shares withheld to cover taxes on RSU vesting, leaving him with over ninety thousand directly held shares.

Rhea-AI Filing Summary

Iridium Communications Inc. (IRDM) reported that officer Timothy James Last, EVP, Sales & Marketing, had 1,501 shares of common stock withheld on September 1, 2026 to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units. After this tax-withholding disposition, he directly holds 91,912 shares of Iridium common stock.

Insider Trade Summary

Tax Withholding: 1,501 shares

Tax Withholding 1 txn

Insider Last Timothy James

Role EVP, Sales & Marketing

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,501	$46.98	$71K

Holdings After Transaction: Common Stock — 91,912 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Shares withheld for tax: 1,501 shares Per-share valuation for withholding: $46.98 per share Shares held after transaction: 91,912 shares

3 metrics

Shares withheld for tax 1,501 shares Shares withheld on September 1, 2026 to satisfy tax withholding obligations on RSU vesting

Per-share valuation for withholding $46.98 per share Valuation applied to the 1,501 shares withheld on September 1, 2026

Shares held after transaction 91,912 shares Directly owned Iridium common shares by Timothy James Last following the reported transaction

Key Terms

restricted stock units, withholding of shares, tax withholding obligations

3 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.

withholding of shares financial

"represents the withholding of shares by the issuer to satisfy"

tax withholding obligations financial

"to satisfy the reporting person's tax withholding obligations"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did IRDM report for Timothy James Last on September 1, 2026?

Iridium reported that 1,501 shares of common stock were withheld from EVP Timothy James Last on September 1, 2026 to satisfy tax withholding obligations tied to the vesting and settlement of restricted stock units.

Was the IRDM Form 4 transaction a market sale or a tax withholding event?

The Form 4 states the event was a withholding of shares by the issuer to satisfy the reporting person’s tax withholding obligations in connection with the vesting and settlement of restricted stock units, not an open-market sale.

At what price per share were the withheld IRDM shares valued?

The 1,501 withheld shares were valued at $46.98 per share, according to the Form 4 entry for the September 1, 2026 tax-withholding disposition of Iridium common stock.

How many IRDM shares does Timothy James Last hold after this Form 4 transaction?

Following the September 1, 2026 tax-withholding disposition, EVP Timothy James Last directly holds 91,912 shares of Iridium Communications Inc. common stock, as reported in the Form 4.

Was the IRDM Form 4 transaction made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirming a plan, and the footnote describes the event as issuer share withholding for tax obligations related to restricted stock unit vesting.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/02/2026 - 05:13 PM EDT Accepted by SEC EDGAR 09/02/2026 - 05:12 PM EDT Learn about SEC filing dates

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^*

Last Timothy James

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Sales & Marketing

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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	09/01/2026		F(1)		1,501	D	$46.98	91,912	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	09/02/2026
	** 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)