Form 4 for OSG OCTAVE SPECIALTY GROUP INC

Accepted 2026-07-13 16:04:38 ET · period of report 2026-07-09 · accession 0001628280-26-048005 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-07-13 16:04	2026-07-09	OSG	Smith R Sharon	EVP, Group COO	M - OptEx	—	+11.8K	161.0K	+8%	—
D	2026-07-13 16:04	2026-07-09	OSG	Smith R Sharon	EVP, Group COO	F - Tax	$6.08	-4,635	156.3K	-3%	-$28.2K
D	2026-07-13 16:04	2026-07-09	OSG	Smith R Sharon	EVP, Group COO	M - OptEx	$0.00	+11.8K	132.1K	+10%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-07-09	M	A	11,779	—	160,961	D	—	—	(F1) The reporting person acquired shares of common stock Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's restricted stock unit ("RSU") awards as part of their 2025 Long Term Incentive Plan.
2	Common	Common Stock	2026-07-09	F	D	4,635	$6.08	156,326	D	—	—	(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	Derivative	Restricted Stock Units	2026-07-09	M	A	11,779	$0.00	132,093	D	— · — to —	11,779 Common Stock	(F3) Each RSU represents a contingent right to receive one share of the common stock of the Company's common stock. (F4) The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on July 9, 2026, July 9, 2027, and July 9, 2028. (F4) The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on July 9, 2026, July 9, 2027, and July 9, 2028.