OCTAVE SPECIALTY GROUP INC (OSG) is held by 86 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling OSG?

In Q1 2026, 35 institutions opened or increased positions in OCTAVE SPECIALTY GROUP INC while 54 reduced or exited — a net selling quarter.

What is the Smart Money Verdict on OSG?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for OCTAVE SPECIALTY GROUP INC.

How many hedge funds hold OSG?

86 institutional investors report holding OCTAVE SPECIALTY GROUP INC (OSG) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into OSG?

As of Q1 2026, tracked institutions in OCTAVE SPECIALTY GROUP INC show 35 buyers versus 54 sellers — net outflows.

OCTAVE SPECIALTY GROUP INC

OSG·023139884·US·Common Stock·Financial Services - Insurance - Specialty-13D/G

Holders

Avg rating(18 Elite)

$92.3M

Total Value

39% (98)

Fund Consensus

35 buying - 54 selling

Smart Money Verdict

View all

Held by 86 funds

18 elite

Who's Trading

Activist

JANE STREET GROUP, LLC1.7%May 11, 2026

ActivistWSWestern Standard LLC5.0%May 11, 2026

Activist

The Vanguard Group0.0%Mar 27, 2026

ActivistGEG1 Execution Services, LLC2.2%Nov 13, 2025

Activist

BlackRock, Inc.7.6%Oct 17, 2025

Activist

Dimensional Fund Advisors LP4.6%Oct 9, 2025

View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Decreased	3.9M(-12.7%)	$18.2M	0.0%	-51.49%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	New	1.9M	$9M	0.0%	+7.50%	38
DIMENSIONAL FUND ADVISORS LP	Decreased	1.3M(-22.3%)	$6.1M	0.0%	-58.47%	0
MWMARSHALL WACE, LLP	Increased	1.1M(+42.3%)	$5M	0.0%	-21.55%	36
GEODE CAPITAL MANAGEMENT, LLC	Decreased	1M(-0.2%)	$4.8M	0.0%	-60.92%	0
STATE STREET CORP	Decreased	941,404(-0.2%)	$4.4M	0.0%	-62.31%	0
JACOBS LEVY EQUITY MANAGEMENT, INC	Increased	884,272(+272.8%)	$4.1M	0.0%	-2.87%	43
Nuveen, LLC	Decreased	800,253(-1.2%)	$3.7M	0.0%	-32.98%	0
JANE STREET GROUP, LLC	Decreased	764,384(-49.7%)	$3.6M	0.0%	-33.84%	0
CACaption Management, LLC	Decreased	642,597(-40.0%)	$3M	0.0%	-39.59%	0
CITADEL ADVISORS LLC	Increased	431,809(+50.3%)	$2M	0.0%	-24.40%	36
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	390,193(-25.9%)	$1.8M	0.0%	-40.28%	0
GOLDMAN SACHS GROUP INC	Decreased	346,293(-55.6%)	$1.6M	0.0%	-44.03%	0
NORTHERN TRUST CORP	Decreased	322,348(-0.3%)	$1.5M	0.0%	-65.12%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	295,900	$1.4M	0.0%	+7.50%	35
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	295,344(-18.3%)	$1.4M	0.0%	-61.64%	0
VFVANGUARD FIDUCIARY TRUST CO	New	274,562	$1.3M	0.0%	+7.50%	35
JPMORGAN CHASE & CO	Increased	268,434(+75.8%)	$1.2M	0.0%	-18.92%	38
UBS Group AG	Increased	264,280(+71.8%)	$1.2M	0.0%	-18.67%	38
BANK OF AMERICA CORP /DE/	Decreased	256,110(-22.6%)	$1.2M	0.0%	-41.79%	0