Octave CEO reports RSU vesting and tax share withholding

Octave Specialty Group Inc.'s Chief Executive Officer Claude LeBlanc reported equity award activity on March 3, 2026.

Rhea-AI Filing Summary

Octave Specialty Group Inc.'s Chief Executive Officer Claude LeBlanc reported equity award activity on March 3, 2026. He acquired 47,130 Restricted Stock Units (RSUs) upon vesting of portions of his 2023 and 2024 RSU awards, each RSU representing one share of common stock.

On the same date, 22,582 RSUs were converted into an equivalent number of Deferred Share Units (DSUs) under the company’s Executive Stock Deferral Plan, allowing him to defer settlement and income taxation. In addition, 24,548 shares of common stock were acquired through derivative conversion, while 10,694 shares of common stock were withheld by the company at $5.60 per share to cover tax obligations.

Insider Trade Summary

69,712 shares exercised/converted

Exercise 4 txns

Insider LeBlanc Claude

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	47,130	$0.00	$0.00
Exercise	Deferred Share Units	22,582	$0.00	$0.00
Exercise	Common Stock	24,548	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	10,694	$5.60	$60K

Holdings After Transaction: Restricted Stock Units — 466,487 contracts (Direct); Deferred Share Units — 197,543 contracts (Direct); Common Stock — 1,047,631 shares (Direct)

Footnotes (6)

1. F1. The reporting person acquired shares of common stock of Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's 2023 and 2024 restrictive stock unit ("RSU") awards.
2. F2. Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.
3. F3. Each RSU represents a contingent right to receive one share of the Company's common stock.
4. F4. Represents the aggregate amount of RSUs that vested.
5. F5. Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.
6. F6. Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

FAQ

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What insider transactions did OSG CEO Claude LeBlanc report on this Form 4?

Claude LeBlanc reported equity award activity involving RSUs, DSUs, and common stock on March 3, 2026. He exercised and settled awards into 47,130 RSUs, 22,582 DSUs, and 24,548 common shares, with a portion of stock withheld to cover tax obligations.

How many Octave Specialty Group (OSG) RSUs vested for the CEO in this filing?

The filing shows 47,130 Restricted Stock Units vesting and settling into Octave Specialty Group common stock. These units came from portions of Claude LeBlanc’s 2023 and 2024 RSU awards, with each RSU representing a contingent right to receive one share of the company’s common stock.

What are Deferred Share Units (DSUs) in the OSG CEO’s March 2026 Form 4?

Deferred Share Units represent rights to receive Octave Specialty Group common shares at a later date. In this filing, 22,582 RSUs were converted into an equal number of DSUs under the Executive Stock Deferral Plan, allowing Claude LeBlanc to defer settlement and related income taxation.

Why were some OSG shares disposed of in Claude LeBlanc’s Form 4 filing?

The filing reports 10,694 shares of Octave Specialty Group common stock disposed of at $5.60 per share under code F. These shares were withheld by the company to satisfy tax withholding obligations associated with the vesting and settlement of the CEO’s RSU awards.

How did the Octave Specialty Group CEO’s direct common stock holdings change in this Form 4?

After the reported transactions, Claude LeBlanc directly held 1,047,631 shares of Octave Specialty Group common stock. This figure reflects RSU and derivative conversions into common stock, as well as shares withheld by the company to pay required tax obligations on the vesting event.

What does transaction code M indicate in the OSG CEO’s Form 4?

Transaction code M indicates an exercise or conversion of a derivative security into common stock. In this Form 4, code M applies to 47,130 RSUs, 22,582 DSUs, and 24,548 common shares, all reflecting non-open-market equity award settlements for Claude LeBlanc.

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Accepted by SEC EDGAR 03/05/2026 - 05:14 PM 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^*

LeBlanc Claude

(Last) (First) (Middle)

C/O OCTAVE SPECIALTY GROUP, INC.

40 WALL STREET, 55TH FLOOR

(Street)

NEW YORK NY 10005

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OCTAVE SPECIALTY GROUP INC [ OSG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

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

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

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

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

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	03/03/2026		M		24,548(1)	A	$0	1,058,325	D
Common Stock	03/03/2026		F		10,694(2)	D	$5.6	1,047,631	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
Restricted Stock Units	(3)	03/03/2026		M			47,130	(4)	(4)	Common Stock	47,130	$0	466,487	D
Deferred Share Units	(5)	03/03/2026		M		22,582		(6)	(6)	Common Stock	22,582	$0	197,543	D

Explanation of Responses:

1. The reporting person acquired shares of common stock of Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's 2023 and 2024 restrictive stock unit ("RSU") awards.

2. Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

3. Each RSU represents a contingent right to receive one share of the Company's common stock.

4. Represents the aggregate amount of RSUs that vested.

5. Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

6. Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

Remarks:

	William White, attorney-in-fact	03/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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