What price per share was used for the IRDM tax-withholding transaction?

The Form 4 reports a value of $46.98 per share for the 693 shares of common stock withheld by Iridium Communications Inc. to cover Timothy Kapalka’s tax obligations linked to restricted stock unit vesting.

Iridium CAO has 693 shares withheld for taxes

Q: What insider transaction did IRDM report for Timothy Kapalka on September 1, 2026?

Iridium reported that 693 shares of common stock were withheld on September 1, 2026 to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units, rather than an open-market sale.

Q: Was the September 1, 2026 IRDM insider transaction an open-market sale?

No. The filing states the transaction represented the withholding of shares by the issuer to satisfy tax withholding obligations tied to vested restricted stock units, not an open-market sale of Iridium Communications Inc. shares.

Q: What role does the reporting person hold in relation to IRDM?

The reporting person, Timothy Kapalka, is an officer serving as Chief Accounting Officer (CAO) of Iridium Satellite LLC, which is associated with Iridium Communications Inc., the issuer of the common stock in this Form 4.

Iridium’s CAO for Iridium Satellite LLC had shares withheld to cover taxes on vested restricted stock units, with 35,038 common shares remaining in direct ownership.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Iridium Communications Inc. (IRDM) reported that Timothy Kapalka, an officer serving as CAO of Iridium Satellite LLC, had shares withheld on September 1, 2026 to cover tax obligations. The issuer withheld 693 shares of common stock in connection with the vesting and settlement of restricted stock units, leaving Kapalka with 35,038 shares held directly. No transactions were reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Tax Withholding: 693 shares

Tax Withholding 1 txn

Insider Kapalka Timothy

Role CAO Iridium Satellite LLC

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock ^F1	693	$46.98	$33K

Holdings After Transaction: Common Stock — 35,038 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 tax: 693 shares Per-share value used for withholding: $46.98 per share Shares held after transaction: 35,038 shares

3 metrics

Shares withheld for tax 693 shares Common stock withheld on September 1, 2026 to satisfy tax obligations on RSU vesting

Per-share value used for withholding $46.98 per share Value applied to the 693 common shares withheld for tax obligations

Shares held after transaction 35,038 shares Direct holdings of Iridium Communications Inc. common stock by Timothy Kapalka after withholding

Key Terms

withholding of shares, tax withholding obligations, restricted stock units

3 terms

withholding of shares financial

"The transaction reported represents the withholding of shares by the issuer"

tax withholding obligations financial

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

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.

FAQ

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

Iridium reported that 693 shares of common stock were withheld on September 1, 2026 to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units, rather than an open-market sale.

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

After the reported tax-related withholding, Timothy Kapalka holds 35,038 shares of Iridium Communications Inc. common stock in direct ownership, according to the filing’s post-transaction share balance.

Was the September 1, 2026 IRDM insider transaction an open-market sale?

No. The filing states the transaction represented the withholding of shares by the issuer to satisfy tax withholding obligations tied to vested restricted stock units, not an open-market sale of Iridium Communications Inc. shares.

Did the IRDM Form 4 indicate a Rule 10b5-1 trading plan for this transaction?

No. The document-level checkbox for Rule 10b5-1 was not marked as applying, so this tax-related share withholding was not reported as executed under a Rule 10b5-1 trading plan.

What role does the reporting person hold in relation to IRDM?

The reporting person, Timothy Kapalka, is an officer serving as Chief Accounting Officer (CAO) of Iridium Satellite LLC, which is associated with Iridium Communications Inc., the issuer of the common stock in this Form 4.

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Available on EDGAR 09/02/2026 - 05:13 PM Accepted by SEC EDGAR 09/02/2026 - 05:12 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^*

Kapalka Timothy

(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)
	CAO Iridium Satellite LLC

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⁾		693	D	$46.98	35,038	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