OCTAVE SPECIALTY GROUP INC

OSGNYSE

$4.60+0.30 (+6.98%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

OCTAVE SPECIALTY GROUP INC price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-47.7%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.16%	$28.5M	0.00%	Not reported
Western Standard LLC	4.99%	$14M	4.75%	Not reported
Vanguard Capital Management LLC	4.38%	$12.3M	0.00%	Not reported
Prescott Group Capital Management, L.L.C.	3.66%	$10.3M	0.89%	Add 3.47%
Third Avenue Management LLC	2.98%	$8.37M	1.34%	Add 0.05%
Bain Capital Credit, LP	2.46%	$6.91M	1.88%	Not reported
Geode Capital Management, LLC	2.46%	$6.91M	0.00%	Not reported
State Street Corp	2.00%	$5.61M	0.00%	Not reported
Dimensional Fund Advisors LP	1.59%	$4.47M	0.00%	Not reported
Jacobs Levy Equity Management, Inc	1.44%	$4.05M	0.01%	Not reported
Marshall Wace, LLP	1.34%	$3.76M	0.00%	Not reported
Zacks Investment Management	1.31%	$3.68M	0.03%	New Not reported
Bracebridge Capital, LLC	1.29%	$3.61M	0.07%	Not reported
Morgan Stanley	1.27%	$3.55M	0.00%	Not reported
Goldman Sachs Group Inc	1.25%	$3.5M	0.00%	Not reported
Essex Investment Management Co LLC	1.20%	$3.37M	0.44%	Add 28.95%
Gendell Jeffrey L	1.10%	$3.08M	0.03%	Reduce 65.04%
Wolf Hill Capital Management, LP	1.07%	$3M	0.25%	Reduce 67.34%
Nuveen, LLC	0.95%	$2.67M	0.00%	Not reported
Citadel Advisors LLC	0.94%	$2.64M	0.00%	Not reported
Caption Management, LLC	0.93%	$2.62M	0.01%	Not reported
Vanguard Portfolio Management LLC	0.87%	$2.45M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.84%	$2.36M	0.00%	Not reported
Northern Trust Corp	0.78%	$2.2M	0.00%	Not reported
IPG Investment Advisors LLC	0.68%	$1.9M	0.27%	Reduce 6.66%
Vanguard Fiduciary Trust Co	0.66%	$1.85M	0.00%	Not reported
AYAL Capital Advisors Ltd	0.62%	$1.75M	0.47%	New Not reported
Jane Street Group, LLC	0.62%	$1.74M	0.00%	Not reported
Raymond James Financial Inc	0.53%	$1.5M	0.00%	Not reported
AQR Capital Management LLC	0.51%	$1.43M	0.00%	Not reported
Prudential Financial Inc	0.50%	$1.41M	0.00%	Not reported
Tudor Investment Corp Et Al	0.48%	$1.35M	0.00%	Not reported
Harbor Advisors LLC	0.44%	$1.23M	0.15%	Not reported
Russell Investments Group, Ltd.	0.43%	$1.22M	0.00%	Not reported
Quantinno Capital Management LP	0.42%	$1.19M	0.00%	Add 290.72%
Legato Capital Management LLC	0.40%	$1.13M	0.09%	Add 38.45%
UBS Group AG	0.33%	$919K	0.00%	Not reported
Gsa Capital Partners LLP	0.32%	$896K	0.06%	Not reported
Susquehanna International Group, LLP	0.30%	$853K	0.00%	Not reported
Bank of New York Mellon Corp	0.30%	$842K	0.00%	Not reported
Bank of America Corp	0.29%	$820K	0.00%	Not reported
Invesco Ltd.	0.28%	$798K	0.00%	Not reported
Bridgeway Capital Management, LLC	0.27%	$764K	0.01%	Not reported
Diametric Capital, LP	0.26%	$739K	0.08%	Not reported
Renaissance Technologies LLC	0.26%	$731K	0.00%	Not reported
Wells Fargo & Company	0.26%	$728K	0.00%	Not reported
Sei Investments Co	0.24%	$683K	0.00%	Not reported
Lone Peak Global Investors LLC	0.24%	$672K	0.09%	New Not reported
American Century Companies Inc	0.20%	$568K	0.00%	Not reported
Man Group plc	0.15%	$415K	0.00%	Not reported

50 of 135 holders

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