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Disclosery

OSG OCTAVE SPECIALTY GROUP INC

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COM NEW (common), issuer CIK 874501

145 managers (148 13F filers) reported a position in OSG shares at 2026-03-31, 32,538,881 shares in all. 35 filers opened a position and 34 filers sold out during the quarter.

Managers
145
13F filers
148
New
35
Added
32
Reduced
55
Sold out
34
Shares held by filers
32,538,881

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
BlackRock, Inc.in group BlackRock, Inc.3,917,798$18.2M<0.01%-570,67013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding2,534,189$11.8MnewTimeline
Western Standard LLC2,247,591$10.5M5.5%-257,03613F-HRTimeline
Prescott Group Capital Management, L.L.…1,592,587$7.41M0.74%+699,07013F-HRTimeline
Wolf Hill Capital Management, LPin group Wolf Hill Capital Management,…1,470,334$6.84M0.97%-418,63913F-HRTimelineGroup
GENDELL JEFFREY Lin group GENDELL JEFFREY L1,413,212$6.57M0.09%-156,26013F-HRTimelineGroup
THIRD AVENUE MANAGEMENT LLC1,341,211$6.24M1.01%+559,11813F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,310,132$6.09M<0.01%-375,49513F-HRTimelineGroup
Bain Capital Credit, LPin group Bain Capital Life Sciences In…1,108,012$5.15M1.7%013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,065,335$4.95M0.01%+316,76313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,022,438$4.76M<0.01%-2,10913F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP941,404$4.38M<0.01%-1,96413F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC884,272$4.11M0.02%+647,08713F-HRTimeline
Nuveen, LLCin group TIAA800,253$3.72M<0.01%-10,02613F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC764,384$3.55M<0.01%-756,27013F-HRTimelineGroup
Caption Management, LLC642,597$2.99M0.14%-428,49713F-HRTimeline
Bracebridge Capital, LLC579,234$2.69M0.48%013F-HRTimeline
RIHO Partners, LLC546,569$2.54M1.6%new13F-HR/ATimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC431,809$2.01M<0.01%+144,52613F-HRTimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC418,203$1.94M0.31%+7,38113F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…390,193$1.81M<0.01%-136,39513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC346,293$1.61M<0.01%-433,68213F-HRTimelineGroup
IPG Investment Advisors LLC325,616$1.51M0.26%new13F-HRTimeline
Brooklyn Investment Group325,351$1.51M0.05%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP322,348$1.5M<0.01%-79813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co295,344$1.37M<0.01%-66,08013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO268,434$1.24M<0.01%+115,73913F-HR/ATimelineGroup
UBS Group AGin group UBS Group AG264,280$1.23M<0.01%+110,41613F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/256,110$1.19M<0.01%-74,79113F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY235,246$1.09M<0.01%-703,46613F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC227,726$1.06M<0.01%+202,56813F-HRTimeline
Harbor Advisors LLC196,382$913K0.13%013F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC182,504$849K0.02%-62,88313F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…181,271$843K<0.01%-164,98713F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL159,963$744K<0.01%new13F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO156,078$726K<0.01%+89,36013F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.151,042$702K<0.01%-5,46213F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…144,301$671K<0.01%+75,52813F-HRTimeline
Arrowpoint Investment Partners (Singapo…in group Arrowpoint Investment Partner…139,168$647K0.94%-63,84313F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC135,088$628K<0.01%-168,19413F-HRTimelineGroup
Legato Capital Management LLC130,760$608K0.06%-1,86013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp130,471$607K<0.01%-7,70213F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC120,540$561K<0.01%-3,05913F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd116,911$544K0.01%+85,85313F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC115,045$535K<0.01%new13F-HR/ATimelineGroup
Empowered Funds, LLC114,004$530K<0.01%new13F-HR/ATimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.113,656$528K<0.01%+10,11213F-HRTimelineGroup
Cruiser Capital Advisors, LLC108,798$506K0.2%+1,65813F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC102,430$476K<0.01%+10,39013F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/101,965$475K<0.01%+31,02413F-HRTimeline
Engineers Gate Manager LP100,416$467K0.01%+18,83113F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC76,907$358K<0.01%new13F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC70,598$328K<0.01%-14,61513F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC70,110$326K<0.01%+15,77013F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…68,805$320K<0.01%new13F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC67,134$312K<0.01%-21,15013F-HR/ATimelineGroup
ALLIANCEBERNSTEIN L.P.37,530$292K<0.01%013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC56,969$265K<0.01%-623,47213F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN55,324$257K<0.01%-30,41013F-HR/ATimelineGroup
RHUMBLINE ADVISERS53,547$249K<0.01%-3,92413F-HRTimeline
HRT FINANCIAL LP50,974$237K<0.01%-60,72813F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC49,828$232K<0.01%-20,30013F-HRTimelineGroup
Quantinno Capital Management LP48,700$226K<0.01%-29,97813F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC42,930$199K<0.01%+19,87713F-HRTimelineGroup
Quantbot Technologies LP38,708$180K0.01%+19,46713F-HRTimeline
GWN SECURITIES INC.36,404$169K0.03%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\30,590$142K<0.01%+4,94313F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC29,220$136K<0.01%new13F-HRTimelineGroup
Commonwealth Financial Services, LLC29,008$135K0.02%new13F-HRTimeline
State of Wyoming28,784$134K0.02%+9,53513F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC25,656$119K<0.01%new13F-HRTimelineGroup
KLCM Advisors, Inc.23,900$111K0.01%013F-HRTimeline
CIBC Asset Management Inc23,893$111K<0.01%013F-HRTimeline
Empirical Asset Management, LLC23,440$109K0.03%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD23,144$108K<0.01%new13F-HRTimeline
Mraz, Amerine & Associates, Inc.21,450$99.7K0.01%+2,50013F-HRTimeline
Gator Capital Management, LLC21,435$99.7K0.02%new13F-HRTimeline
Park Capital Management, LLC / WI21,262$98.9K0.1%new13F-HRTimeline
SG Americas Securities, LLC18,817$87K<0.01%-384,42013F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…18,273$85K<0.01%-87913F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…18,197$84.6K<0.01%-2,83613F-HRTimelineGroup
Quotient Wealth Partners, LLC16,896$78.6K<0.01%new13F-HRTimeline
ANCHYRA PARTNERS LLC16,328$75.9K0.02%new13F-HRTimeline
Centiva Capital, LP16,085$74.8K<0.01%new13F-HRTimeline
AXQ CAPITAL, LP15,436$71.8K0.01%-24,93813F-HRTimeline
Able Wealth Management LLC15,246$70.9K0.02%new13F-HRTimeline
DAYMARK WEALTH PARTNERS, LLC14,596$67.9K<0.01%new13F-HRTimeline
Metis Global Partners, LLC14,334$66.7K<0.01%-10,80213F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV13,504$62.8K<0.01%new13F-HRTimeline
Verition Fund Management LLC13,500$62.8K<0.01%-4,00013F-HRTimeline
AIRE ADVISORS, LLC13,446$62.5K0.01%new13F-HRTimeline
Graham Capital Management, L.P.13,053$60.7K<0.01%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.12,864$59.8K<0.01%-31,26213F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…12,630$58.7K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC12,249$57K<0.01%+5,15113F-HRTimelineGroup
GROUP ONE TRADING LLC11,948$55.6K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…11,825$55K<0.01%013F-HRTimeline
Crown Wealth Group, LLC11,162$51.9K0.02%013F-HRTimeline
Symmetry Partners, LLC11,007$51.2K<0.01%new13F-HRTimeline
IMC-Chicago, LLC10,897$50.7K<0.01%-15,40613F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …10,832$50.4K<0.01%-1,76213F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources10,628$49.4K<0.01%-1,33113F-HRTimelineGroup
UNITED CAPITAL FINANCIAL ADVISORS, LLCin group UNITED CAPITAL FINANCIAL ADVI…10,405$48.4K<0.01%new13F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND10,073$46.8K<0.01%013F-HRTimeline
SIMPLEX TRADING, LLC9,458$44K<0.01%-1,15313F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS8,300$38.6K<0.01%-78,43413F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…7,419$34.5K<0.01%-12,53713F-HRTimelineGroup
Parallel Advisors, LLC6,473$30.1K<0.01%+6,32213F-HR/ATimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,420$20.6K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,149$19.3K<0.01%+2,87213F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,839$17.9K<0.01%013F-HRTimelineGroup
Farther Finance Advisors, LLC3,852$17.7K<0.01%+3,73013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,648$17K<0.01%013F-HRTimelineGroup
CWM, LLCin group CWM, LLC3,200$14.9K<0.01%-2,39813F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,233$10.4K<0.01%-30613F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,944$9.04K<0.01%+1,91813F-HRTimelineGroup
QUADRANT CAPITAL GROUP LLC1,572$7.31K<0.01%-30613F-HR/ATimeline
Sterling Capital Management LLC1,291$6K<0.01%-1,08813F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.1,219$6K<0.01%+8813F-HRTimeline
MAI Capital Management1,064$4.95K<0.01%-513F-HRTimeline
FMR LLCin group FMR LLC994$4.62K<0.01%-1,52313F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC970$4.51K<0.01%013F-HRTimeline
Wiser Advisor Group LLC500$2.33K<0.01%013F-HRTimeline
Capital Analysts, LLCin group Capital Analysts, LLC325$2K<0.01%013F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…352$1.64K<0.01%+23913F-HRTimelineGroup
Optiver Holding B.V.in group Optiver Holding B.V.332$1.54K<0.01%-3813F-HR/ATimelineGroup
Bell Investment Advisors, Inc293$1.36K<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…237$1.1K<0.01%+17913F-HR/ATimelineGroup
DiNuzzo Private Wealth, Inc.177$824<0.01%013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC148$688<0.01%013F-HRTimeline
Essential Partners LLC110$512<0.01%new13F-HRTimeline
Advisors Asset Management, Inc.98$456<0.01%013F-HRTimeline
Bare Financial Services, Inc87$405<0.01%new13F-HRTimeline
Basecamp Wealth Advisors LLC82$381<0.01%new13F-HRTimeline
GAMMA Investing LLC72$335<0.01%-35913F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…39$181<0.01%new13F-HRTimelineGroup
Allworth Financial LP34$159<0.01%-25713F-HRTimeline
IFP Advisors, Inc34$158<0.01%+313F-HRTimeline
ROTHSCHILD INVESTMENT LLC32$149<0.01%013F-HRTimeline
Legacy Wealth Managment, LLC/IDin group Legacy Wealth Managment, LLC/…25$117<0.01%013F-HRTimelineGroup
Root Financial Partners, LLC22$102<0.01%new13F-HRTimeline
Advisory Services Network, LLC20$93<0.01%new13F-HRTimeline
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…11$51<0.01%new13F-HRTimelineGroup
SBI Securities Co., Ltd.10$47<0.01%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA17$00%-1,17713F-HRTimelineGroupValue filed as zero, left out of ratios.

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