OSG CFO David Trick reports RSU vesting and tax share withholding (OSG)

Rhea-AI Filing Summary

Octave Specialty Group executive David Trick reported equity award activity involving restricted and deferred stock units. On March 3, 2026, he acquired 11,505 shares through the exercise and settlement of restricted stock units and 9,790 deferred share units, each representing one share of common stock.

He also acquired 1,715 shares of common stock upon RSU vesting and simultaneously disposed of 1,715 shares at $5.60 per share to satisfy tax withholding obligations. After these transactions, his directly held common stock position increased to 260,631 shares.

Insider Trade Summary

21,295 shares exercised/converted

Mixed 4 txns

Insider Trick David

Role Exec VP, CFO & Treasurer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	11,505	$0.00	--
Exercise	Deferred Share Units	9,790	$0.00	--
Exercise	Common Stock	1,715	$0.00	--
Tax Withholding	Common Stock	1,715	$5.60	$10K

Holdings After Transaction: Restricted Stock Units — 111,934 shares (Direct); Deferred Share Units — 36,510 shares (Direct); Common Stock — 262,346 shares (Direct)

Footnotes (1)

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. Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations. Each RSU represents a contingent right to receive one share of the Company's common stock. Represents the aggregate amount of RSUs that vested. Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company. 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.

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

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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^*

Trick David

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Exec VP, CFO & Treasurer

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		1,715(1)	A	$0	262,346	D
Common Stock	03/03/2026		F		1,715(2)	D	$5.6	260,631	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			11,505	(4)	(4)	Common Stock	11,505	$0	111,934	D
Deferred Share Units	(5)	03/03/2026		M			9,790	(6)	(6)	Common Stock	9,790	$0	36,510	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	03/05/2026
	** 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).
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FAQ

What insider transactions did OSG executive David Trick report?

David Trick reported equity award activity, mainly from restricted stock units and deferred share units. On March 3, 2026, he acquired common shares via RSU vesting and deferred share units, and an equal number of shares were withheld by the company to cover related tax obligations.

How many OSG restricted stock units vested for David Trick?

David Trick had 11,505 restricted stock units vest and settle into common shares. These units were from his 2023 and 2024 RSU awards, and each RSU represented a contingent right to receive one share of Octave Specialty Group’s common stock upon vesting and settlement.

What are OSG deferred share units reported in this Form 4?

Deferred share units, or DSUs, are rights to receive common stock in the future. Trick converted 9,790 RSUs into an equivalent number of DSUs under Octave Specialty Group’s Executive Stock Deferral Plan, designed to defer settlement and income taxation of certain equity awards under Section 409A rules.

Did OSG withhold shares from David Trick to cover taxes?

Yes. The company withheld 1,715 common shares from David Trick at a value of $5.60 per share. These shares came from RSUs converted into stock and were retained by Octave Specialty Group to satisfy tax withholding obligations associated with the vesting event.

How many OSG common shares does David Trick hold after these transactions?

Following the March 3, 2026 transactions, David Trick directly owned 260,631 shares of Octave Specialty Group common stock. This figure reflects both the shares he received from restricted stock unit vesting and the shares withheld by the company to cover his related tax obligations.

What do OSG’s RSUs and DSUs each represent for David Trick?

Each restricted stock unit and each deferred share unit reported for David Trick represents a contingent right to receive one share of Octave Specialty Group common stock. RSUs settle at vesting, while DSUs defer settlement and taxation under the company’s Executive Stock Deferral Plan.