Iridium CFO has 1,461 shares withheld for taxes

Q: Was the IRDM CFO’s Form 4 transaction a market sale or a tax withholding?

The transaction was tax withholding, not a market sale. Iridium stated the 1,461 shares represented shares withheld by the issuer to satisfy the CFO’s tax withholding obligations upon RSU vesting and settlement.

Q: At what price were the withheld IRDM shares valued in this Form 4?

The withheld shares were valued at $46.98 per share. This price applies to the 1,461 shares of Iridium common stock withheld to cover the CFO’s tax withholding obligations related to restricted stock unit vesting.

Q: Was the IRDM CFO’s tax-withholding transaction under a Rule 10b5-1 plan?

No. The filing indicates no Rule 10b5-1 trading plan for this transaction. The shares were withheld by the issuer solely to satisfy the CFO’s tax withholding obligations related to RSU vesting.

Iridium’s CFO had shares withheld to cover taxes on RSU vesting, leaving him with over 126,000 directly held shares.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Iridium Communications Inc. (IRDM) reported that its Chief Financial Officer, Vincent James O'Neill, had 1,461 shares of common stock withheld on September 1, 2026 to satisfy tax withholding obligations related to the vesting of restricted stock units. The shares were valued at $46.98 per share, and he now directly holds 126,944 shares of common stock. No Rule 10b5-1 trading plan is reported for this tax-withholding transaction.

Insider Trade Summary

Tax Withholding: 1,461 shares

Tax Withholding 1 txn

Insider O'Neill Vincent James

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock ^F1	1,461	$46.98	$69K

Holdings After Transaction: Common Stock — 126,944 shares (Direct)

Footnotes (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 taxes: 1,461 shares Per-share value of withheld shares: $46.98 per share Shares held after transaction: 126,944 shares

3 metrics

Shares withheld for taxes 1,461 shares Common stock withheld on September 1, 2026 to satisfy tax withholding obligations

Per-share value of withheld shares $46.98 per share Valuation applied to the 1,461 withheld shares

Shares held after transaction 126,944 shares Directly held Iridium common stock by the CFO after tax withholding

Key Terms

restricted stock units, tax withholding obligations, Rule 10b5-1

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.

tax withholding obligations financial

"withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations"

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for this transaction"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transaction did IRDM report for its CFO?

Iridium Communications Inc. reported that CFO Vincent James O'Neill had 1,461 shares of common stock withheld on September 1, 2026 to satisfy tax withholding obligations tied to the vesting of restricted stock units.

Was the IRDM CFO’s Form 4 transaction a market sale or a tax withholding?

The transaction was tax withholding, not a market sale. Iridium stated the 1,461 shares represented shares withheld by the issuer to satisfy the CFO’s tax withholding obligations upon RSU vesting and settlement.

At what price were the withheld IRDM shares valued in this Form 4?

The withheld shares were valued at $46.98 per share. This price applies to the 1,461 shares of Iridium common stock withheld to cover the CFO’s tax withholding obligations related to restricted stock unit vesting.

How many IRDM shares does the CFO hold after the reported transaction?

After the tax-withholding transaction, CFO Vincent James O'Neill directly holds 126,944 shares of Iridium common stock. This figure reflects his direct ownership following the withholding of 1,461 shares for tax purposes.

Was the IRDM CFO’s tax-withholding transaction under a Rule 10b5-1 plan?

No. The filing indicates no Rule 10b5-1 trading plan for this transaction. The shares were withheld by the issuer solely to satisfy the CFO’s tax withholding obligations related to RSU vesting.

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Available on EDGAR 09/02/2026 - 05:13 PM Accepted by SEC EDGAR 09/02/2026 - 05:13 PM

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^*

O'Neill Vincent 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)
	Chief Financial Officer

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/01/2026		F⁽¹⁾		1,461	D	$46.98	126,944	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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)

Source: View Original Filing on SEC EDGAR