Octave Specialty Group awards 8,224 stock units

The award is scheduled to vest October 1, 2027, with settlement upon vesting or an earlier end to her board service unless deferred.

Rhea-AI Filing Summary

Octave Specialty Group Inc. director Joan M. Lammtennant acquired 8,224 restricted stock units as an award on October 1, 2026. Each RSU represents a contingent right to receive one common share. Her direct RSU position following the award was 30,815 units. The award vests one year later, on October 1, 2027; vested RSUs settle and convert into common shares upon the earlier of vesting or her resignation from, or otherwise ceasing to serve on, the Board, unless deferred at her election.

Insider Trade Summary

Grant/Award: 8,224 shares

Grant/Award 1 txn

Insider LAMMTENNANT JOAN M

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units F1, F2	8,224	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 30,815 contracts (Direct)

Footnotes (2)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Octave Specialty Group, Inc. (the "Company").
2. F2. RSU's granted on October 1, 2026 shall vest one year later on October 1, 2027. RSUs that have become vested shall settle and convert into shares of common stock upon the earlier of the vesting date or the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company, unless otherwise deferred upon the election of the reporting person.

Key Figures

RSUs awarded: 8,224 restricted stock units Direct RSUs following transaction: 30,815 restricted stock units Common shares per RSU: 1 share +1 more

4 metrics

RSUs awarded 8,224 restricted stock units Awarded October 1, 2026

Direct RSUs following transaction 30,815 restricted stock units Following the October 1, 2026 award

Common shares per RSU 1 share Each RSU represents a contingent right to receive one common share

RSU vesting date October 1, 2027 One year after the grant date

Key Terms

Restricted Stock Unit, contingent right, settle and convert

3 terms

Restricted Stock Unit technical

"Each restricted stock unit ("RSU") represents a contingent right"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

contingent right technical

"represents a contingent right to receive one share"

settle and convert technical

"shall settle and convert into shares of common stock"

FAQ

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

How many RSUs did the OSG director receive?

Joan M. Lammtennant, a director of Octave Specialty Group Inc. (OSG), received 8,224 restricted stock units on October 1, 2026. Each RSU represents a contingent right to receive one share of common stock.

When do the OSG director's RSUs vest and settle?

The RSUs are scheduled to vest on October 1, 2027. Vested RSUs settle and convert into common shares upon the earlier of the vesting date or the date Joan M. Lammtennant resigns from, or otherwise ceases to be a member of, the Board, unless she elects to defer settlement.

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

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Available on EDGAR 10/05/2026 - 04:27 PM Accepted by SEC EDGAR 10/05/2026 - 04:26 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^*

LAMMTENNANT JOAN M

(Last) (First) (Middle)

C/O OCTAVE SPECIALTY GROUP, INC.

40 WALL STREET, 55TH FLOOR

(Street)

NEW YORK NEW YORK 10005

(City) (State) (Zip)

UNITED STATES

(Country)

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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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

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	(1)	10/01/2026		A		8,224		(2)	(2)	Common Stock	8,224	$0	30,815	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Octave Specialty Group, Inc. (the "Company").

2. RSU's granted on October 1, 2026 shall vest one year later on October 1, 2027. RSUs that have become vested shall settle and convert into shares of common stock upon the earlier of the vesting date or the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company, unless otherwise deferred upon the election of the reporting person.

Remarks:

	William J. White, attorney in fact	10/05/2026
	** 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).
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)