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Disclosery

OSG OCTAVE SPECIALTY GROUP INC

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COM NEW (common), issuer CIK 874501

130 managers (130 13F filers) reported a position in OSG shares at 2025-09-30, 37,644,029 shares in all. 22 filers opened a position and 37 filers sold out during the quarter.

Managers
130
13F filers
130
New
22
Added
44
Reduced
46
Sold out
37
Shares held by filers
37,644,029

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
LeBlanc Claudedirector, officer (Chief Executive Officer)2026-10-03-11,638 F$4.6Form 4
LeBlanc Claudedirector, officer (Chief Executive Officer)2026-10-03+11,628 MForm 4
LeBlanc Claudedirector, officer (Chief Executive Officer)2026-10-03-8,421 F$4.6Form 4
LeBlanc Claudedirector, officer (Chief Executive Officer)2026-10-03+15,229 MForm 4
Smith R Sharonofficer (Exec VP & Group COO)2026-10-03-2,539 F$4.6Form 4
Smith R Sharonofficer (Exec VP & Group COO)2026-10-03+2,539 MForm 4
Trick Davidofficer (Exec VP, CFO & Treasurer)2026-10-03-3,047 F$4.6Form 4
Trick Davidofficer (Exec VP, CFO & Treasurer)2026-10-03+3,047 MForm 4

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …1,206,350$232M0.19%+1,188,35713F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.4,493,331$37.5M<0.01%-94,72313F-HRTimelineGroup
Western Standard LLC2,641,351$22M11.78%new13F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC2,555,181$21.3M<0.01%-13,25913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,141,047$17.9M<0.01%-254,69013F-HRTimelineGroup
CONTINENTAL GENERAL INSURANCE COin group CONTINENTAL GENERAL INSURANCE…2,068,349$17.3M3.34%+850,00013F-HRTimelineGroup
GENDELL JEFFREY Lin group GENDELL JEFFREY L1,864,512$15.6M0.29%+666,09213F-HRTimelineGroup
FMR LLCin group FMR LLC1,525,423$12.7M<0.01%-7,22213F-HRTimelineGroup
Wolf Hill Capital Management, LPin group Wolf Hill Capital Management,…1,158,197$9.66M0.92%+464,75313F-HR/ATimelineGroup
Caption Management, LLC1,121,179$9.35M0.54%+945,10513F-HRTimeline
Bain Capital Credit, LPin group Bain Capital Life Sciences In…1,108,012$9.24M2.91%013F-HRTimelineGroup
Nuveen, LLCin group TIAA1,079,328$9M<0.01%+612,35013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,060,594$8.85M<0.01%-62,02213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP967,188$8.07M<0.01%+8,33313F-HRTimelineGroup
Prescott Group Capital Management, L.L.…895,977$7.47M0.79%+20,00013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC849,182$7.08M0.01%+336,73913F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC700,895$5.85M<0.01%-295,14613F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC669,513$5.58M<0.01%+214,68613F-HR/ATimelineGroup
THIRD AVENUE MANAGEMENT LLC603,391$4.91M0.92%013F-HRTimeline
Bracebridge Capital, LLC579,234$4.83M2.01%013F-HRTimeline
Schonfeld Strategic Advisors LLC548,442$4.57M0.03%+262,86113F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\532,138$4.44M<0.01%-113,22213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC524,890$4.38M<0.01%+45,50713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP455,074$3.8M<0.01%-193,08113F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources17,080$3.75M<0.01%+6,40313F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co382,572$3.19M<0.01%-5,38713F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP362,021$3.02M<0.01%-26,90013F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC319,493$2.66M0.06%+2,24413F-HRTimeline
UBS Group AGin group UBS Group AG279,489$2.33M<0.01%-80,77613F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…274,310$2.29M<0.01%-666,27313F-HRTimelineGroup
Empowered Funds, LLC234,493$1.96M0.02%+27,24413F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/203,202$1.69M<0.01%+36,93713F-HR/ATimelineGroup
Arrowpoint Investment Partners (Singapo…in group Arrowpoint Investment Partner…203,011$1.69M2.48%new13F-HRTimelineGroup
Harbor Advisors LLC196,382$1.64M0.25%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY194,124$1.62M<0.01%-263,50713F-HR/ATimelineGroup
VELA Investment Management, LLC180,089$1.5M0.43%+57,31913F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC175,017$1.46M<0.01%-291,35213F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC171,543$1.43M<0.01%-947,21813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.164,081$1.37M<0.01%-6,35513F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd150,489$1.26M0.03%-200,21213F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp138,687$1.16M<0.01%-3,24813F-HRTimelineGroup
Trexquant Investment LP136,696$1.14M0.01%-180,26413F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC132,648$1.11M<0.01%-305,68713F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL125,155$1.04M0.01%-180,54713F-HR/ATimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.118,725$990K<0.01%-216,92213F-HRTimelineGroup
Cruiser Capital Advisors, LLC111,800$932K0.93%new13F-HRTimeline
Connor, Clark & Lunn Investment Managem…105,465$880K<0.01%-5,58813F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC103,668$828K<0.01%+6,32013F-HRTimelineGroup
IMC-Chicago, LLC97,422$812K0.01%-43,60413F-HRTimeline
Creative Planningin group Creative Planning90,303$753K<0.01%+69,88213F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC89,200$744K<0.01%-96,90013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS89,147$743K<0.01%-30,32113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC82,562$689K<0.01%+31,26213F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management81,221$677K<0.01%new13F-HRTimelineGroup
DLD Asset Management, LP79,300$661K0.09%+29,30013F-HR/ATimeline
SG Americas Securities, LLC75,415$629K<0.01%+53,77313F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN73,857$616K<0.01%+2,04913F-HRTimelineGroup
Empirical Finance, LLC72,182$602K0.03%013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/70,941$592K<0.01%+18,73613F-HRTimeline
Sender Co & Partners, Inc.70,890$591K0.23%new13F-HRTimeline
RHUMBLINE ADVISERS67,170$560K<0.01%-7,74613F-HRTimeline
CAXTON ASSOCIATES LLP65,647$547K0.02%013F-HRTimeline
Diametric Capital, LP64,626$539K0.2%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC56,625$472K<0.01%new13F-HRTimelineGroup
Quantinno Capital Management LP40,353$337K<0.01%+11,52713F-HRTimeline
ALLIANCEBERNSTEIN L.P.37,530$313K<0.01%013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…35,485$296K<0.01%-15,21813F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO34,555$288K<0.01%+3,32413F-HR/ATimelineGroup
Quarry LP26,000$217K0.05%+24,44513F-HRTimeline
WOLVERINE TRADING, LLC21,298$207K<0.01%new13F-HRTimeline
KLCM Advisors, Inc.24,000$200K0.02%013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC22,520$188K<0.01%-18,86813F-HRTimeline
Cresset Asset Management, LLC22,193$185K<0.01%013F-HR/ATimeline
Gator Capital Management, LLC21,435$179K0.05%013F-HRTimeline
SIMPLEX TRADING, LLC20,878$174K<0.01%-10,34113F-HRTimeline
Verition Fund Management LLC20,533$171K<0.01%-18,78513F-HRTimeline
GROUP ONE TRADING LLC20,449$171K0.01%-301,27513F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…20,052$167K<0.01%-6,22913F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…18,353$153K<0.01%new13F-HRTimelineGroup
Mraz, Amerine & Associates, Inc.18,250$152K0.02%-60013F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC17,878$149K0.01%new13F-HRTimeline
ExodusPoint Capital Management, LP14,159$118K<0.01%-31,91513F-HRTimeline
IEQ CAPITAL, LLC13,702$114K<0.01%+3513F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…12,630$105K<0.01%013F-HRTimeline
Aquatic Capital Management LLC12,588$105K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…11,825$98.6K<0.01%+2,62313F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC11,490$95.8K<0.01%-36113F-HRTimelineGroup
FNY Investment Advisers, LLC11,207$93K0.03%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND10,073$84K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC9,341$77.9K<0.01%-13,69013F-HRTimelineGroup
CWM, LLCin group CWM, LLC6,961$58K<0.01%+2,99913F-HRTimelineGroup
Arax Advisory Partners6,614$55.2K<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…4,916$41K<0.01%+4,22713F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,420$36.9K<0.01%-81113F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,839$32K<0.01%-46613F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,648$30.4K<0.01%-93513F-HRTimelineGroup
Sterling Capital Management LLC2,978$24.8K<0.01%+1,75813F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,974$24.8K<0.01%new13F-HRTimeline
State of Wyoming2,589$21.6K<0.01%-11,91213F-HRTimeline
QUADRANT CAPITAL GROUP LLC2,483$20.7K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,343$20K<0.01%-49,86613F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,387$19.9K<0.01%+87713F-HRTimelineGroup
Cove Street Capital, LLC1,861$15.5K0.02%new13F-HRTimeline
Versant Capital Management, Inc1,619$13.5K<0.01%013F-HRTimeline
AMALGAMATED BANK1,567$13K<0.01%013F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.1,150$10K<0.01%+2613F-HRTimeline
MAI Capital Management1,064$8.87K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC970$8.09K<0.01%-4813F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\755$6.3K<0.01%+52813F-HRTimelineGroup
SIGNATUREFD, LLC754$6.29K<0.01%+63813F-HRTimeline
Advisors Asset Management, Inc.101$6.03K<0.01%-113F-HR/ATimeline
GAMMA Investing LLC627$5.23K<0.01%-13313F-HRTimeline
Wiser Advisor Group LLC500$4.17K0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.424$3.54K<0.01%new13F-HRTimelineGroup
Allworth Financial LP390$3.25K<0.01%+25313F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/385$3.21K<0.01%+37813F-HRTimelineGroup
Capital Analysts, LLCin group Capital Analysts, LLC325$3K<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC260$2.17K<0.01%+24513F-HRTimeline
DiNuzzo Private Wealth, Inc.177$1.6K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…143$1.19K<0.01%+4213F-HRTimelineGroup
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC120$1K<0.01%new13F-HRTimelineGroup
Farther Finance Advisors, LLC105$876<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…72$600<0.01%+2113F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC62$517<0.01%+3013F-HRTimeline
True Wealth Design, LLC51$426<0.01%+1613F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.26$234<0.01%013F-HRTimelineGroup
Legacy Wealth Managment, LLC/IDin group Legacy Wealth Managment, LLC/…25$209<0.01%013F-HRTimelineGroup
IFP Advisors, Inc15$125<0.01%+1513F-HR/ATimeline
Essential Partners LLC14$117<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.12$100<0.01%-42813F-HRTimeline

Events

  • LeBlanc Claude acquired 6,798 OSG shares on 2026-10-03, Form 4 filed 2026-10-06. 0001628280-26-065277

    Accepted , ingested

  • Smith R Sharon reported transactions in OSG shares with no net change in a Form 4 filed 2026-10-06. 0001628280-26-065275

    Accepted , ingested

  • Trick David reported transactions in OSG shares with no net change in a Form 4 filed 2026-10-06. 0001628280-26-065273

    Accepted , ingested