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Octave Specialty Group Inc

OSG
Exchange
NYSE
Industry
Surety Insurance
SEC CIK
0000874501

No open-market purchases or sales by Octave Specialty Group Inc insiders were filed in the last 90 days; 147 institutions reported holding it in 13F filings for Q2 2026, worth $187.6M in total; no superinvestor holds it.

13F holders, Q1 2021

Institutional positions in Octave Specialty Group Inc as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
140
No complete 13F data for Q4 2020
Shares held
36.5M
No complete 13F data for Q4 2020
Total value
$611.7M
No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting OSG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 140 institutions
Q1 2021: 140 institutionsQ2 2021: 126 institutionsQ3 2021: 133 institutionsQ4 2021: 135 institutionsQ1 2022: 150 institutionsQ2 2022: 141 institutionsQ3 2022: 154 institutionsQ4 2022: 167 institutionsQ1 2023: 160 institutionsQ2 2023: 160 institutionsQ3 2023: 167 institutionsQ4 2023: 174 institutionsQ1 2024: 172 institutionsQ2 2024: 182 institutionsQ3 2024: 180 institutionsQ4 2024: 181 institutionsQ1 2025: 176 institutionsQ2 2025: 147 institutionsQ3 2025: 130 institutionsQ4 2025: 144 institutionsQ1 2026: 148 institutionsQ2 2026: 147 institutions
Value heldQ1 2021: $611.7M
Q1 2021: $611.7MQ2 2021: $565.0MQ3 2021: $516.2MQ4 2021: $598.9MQ1 2022: $392.1MQ2 2022: $386.6MQ3 2022: $400.7MQ4 2022: $600.4MQ1 2023: $596.2MQ2 2023: $529.6MQ3 2023: $438.7MQ4 2023: $628.4MQ1 2024: $591.5MQ2 2024: $495.9MQ3 2024: $449.6MQ4 2024: $522.4MQ1 2025: $327.5MQ2 2025: $262.5MQ3 2025: $303.6MQ4 2025: $270.0MQ1 2026: $151.4MQ2 2026: $187.6M
Institutions holding OSG and their total value by quarter
QuarterHoldersValue
Q2 2026147$187.6M
Q1 2026148$151.4M
Q4 2025144$270.0M
Q3 2025130$303.6M
Q2 2025147$262.5M
Q1 2025176$327.5M
Q4 2024181$522.4M
Q3 2024180$449.6M
Q2 2024182$495.9M
Q1 2024172$591.5M
Q4 2023174$628.4M
Q3 2023167$438.7M
Q2 2023160$529.6M
Q1 2023160$596.2M
Q4 2022167$600.4M
Q3 2022154$400.7M
Q2 2022141$386.6M
Q1 2022150$392.1M
Q4 2021135$598.9M
Q3 2021133$516.2M
Q2 2021126$565.0M
Q1 2021140$611.7M

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding OSG in Q1 2021
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock Inc.6,618,132$110.8M0.00%––
Vanguard Group Inc4,676,009$78.3M0.00%––
FMR LLC2,060,260$34.5M0.00%––
Arctis Global LLC1,771,563$29.7M4.29%––
Dimensional Fund Advisors LP1,762,134$29.5M0.01%––
Morgan Stanley1,454,848$24.4M0.00%––
State Street Corp1,430,638$23.9M0.00%––
EJF Capital LLC1,375,073$23.0M1.66%––
Boussard & Gavaudan Investment Management LLP1,081,731$18.3M1.78%––
CQS (US), LLC1,000,000$16.7M1.11%––
Goldman Sachs Group Inc845,501$14.2M0.00%––
Assenagon Asset Management S.A.834,281$14.0M0.07%––
Bracebridge Capital, LLC799,234$13.4M6.65%––
Barclays PLC731,967$12.3M0.01%––
Geode Capital Management, LLC730,850$12.2M0.00%––
Citigroup Inc722,416$12.1M0.01%––
Deutsche Bank AG565,280$9.46M0.01%––
Northern Trust Corp535,654$8.97M0.00%––
JPMorgan Chase & Co523,657$8.77M0.00%––
Charles Schwab Investment Management Inc520,259$8.71M0.00%––
Bank of New York Mellon Corp461,696$7.73M0.00%––
Hotchkis & Wiley Capital Management LLC381,917$6.39M0.02%––
Principal Financial Group Inc315,131$5.28M0.00%––
Harbor Advisors LLC261,382$4.38M0.97%––
Ameriprise Financial Inc247,894$4.15M0.00%––
Philadelphia Financial Management of San Francisco, LLC239,807$4.01M1.22%––
Nuveen Asset Management, LLC202,059$3.38M0.00%––
State of New Jersey Common Pension Fund D162,373$2.72M0.01%––
Invesco Ltd.161,400$2.70M0.00%––
Public Sector Pension Investment Board155,451$2.60M0.02%––
Rhumbline Advisers153,162$2.56M0.00%––
Credit Suisse AG151,651$2.54M0.00%––
Jacobs Asset Management, LLC150,000$2.51M0.99%––
Wells Fargo & Company147,653$2.47M0.00%––
Quinn Opportunity Partners LLC136,701$2.29M0.15%––
Bank of America Corp131,335$2.20M0.00%––
Legal & General Group Plc127,792$2.14M0.00%––
Healthcare of Ontario Pension Plan Trust Fund126,100$2.11M0.01%––
Nomura Holdings Inc125,000$2.10M0.02%––
D. E. Shaw & Co., Inc.114,710$1.92M0.00%––
Swiss National Bank103,800$1.74M0.00%––
Millennium Management LLC103,494$1.73M0.00%––
Citadel Advisors LLC92,629$1.55M0.00%––
California Public Employees Retirement System92,600$1.55M0.00%––
UBS Group AG89,990$1.51M0.00%––
Caption Management, LLC76,800$1.29M0.17%––
Parametric Portfolio Associates LLC74,593$1.25M0.00%––
Verition Fund Management LLC72,048$1.21M0.02%––
California State Teachers Retirement System68,260$1.14M0.00%––
Clear Harbor Asset Management, LLC67,900$1.14M0.15%––
Arrowstreet Capital, Limited Partnership61,363$1.03M0.00%––
Ensign Peak Advisors, Inc57,500$963.0K0.00%––
Two Sigma Advisers, LP55,300$926.0K0.00%––
Tudor Investment Corp Et Al54,628$914.0K0.02%––
Royce & Associates LP53,000$887.0K0.01%––
Prudential Financial Inc51,240$858.0K0.00%––
Price T Rowe Associates Inc49,308$825.0K0.00%––
Cubist Systematic Strategies, LLC48,755$816.0K0.01%––
Comerica Bank46,330$794.0K0.00%––
UBS Asset Management Americas Inc43,600$729.9K0.00%––
Susquehanna Fundamental Investments, LLC41,664$697.0K0.01%––
Jane Street Group, LLC40,945$686.0K0.00%––
Great West Life Assurance Co39,955$669.0K0.00%––
New York State Common Retirement Fund39,800$666.0K0.00%––
Susquehanna International Group, LLP38,760$649.0K0.00%––
Thrivent Financial for Lutherans37,664$630.0K0.00%––
Alliancebernstein L.P.35,730$598.0K0.00%––
Commonwealth of Pennsylvania Public School Empls Retrmt Sys35,360$592.0K0.01%––
Raffles Associates LP34,993$586.0K0.60%––
Texas Permanent School Fund34,254$573.0K0.01%––
State of Alaska, Department of Revenue31,032$519.0K0.01%––
American International Group, Inc.30,236$506.0K0.00%––
Boothbay Fund Management, LLC27,689$464.0K0.02%––
Raymond James Financial Services Advisors, Inc.27,615$462.0K0.00%––
Kamunting Street Capital Management, L.P.27,500$460.0K0.26%––
HSBC Holdings PLC25,700$432.0K0.00%––
Manufacturers Life Insurance Company, The25,297$423.0K0.00%––
Private Advisor Group, LLC24,898$417.0K0.00%––
ExodusPoint Capital Management, LP24,392$408.0K0.01%––
BNP Paribas Arbitrage, SA23,996$401.7K0.00%––
SEI Investments Co22,850$383.0K0.00%––
Walleye Trading LLC21,314$357.0K0.01%––
Redwood Investment Management, LLC21,225$355.0K0.07%––
Mraz, Amerine & Associates, Inc.21,100$353.0K0.10%––
Voya Investment Management LLC20,829$349.0K0.00%––
Louisiana State Employees Retirement System20,800$348.0K0.01%––
State Board of Administration of Florida Retirement System18,933$317.0K0.00%––
Oregon Public Employees Retirement Fund18,882$316.0K0.00%––
Maven Securities LTD16,961$286.0K0.03%––
State of Tennessee, Treasury Department16,343$274.0K0.00%––
Community Capital Management, Inc.16,000$268.0K0.30%––
Alpine Global Management, LLC15,799$264.0K0.03%––
Engineers Gate Manager LP15,575$261.0K0.01%––
HRT Financial LP15,297$256.0K0.00%––
Two Sigma Investments, LP14,960$250.0K0.00%––
Simplex Trading, LLC14,517$243.0K0.01%––
New York State Teachers Retirement System14,430$242.0K0.00%––
Wolverine Trading, LLC13,817$234.0K0.00%––
Wellington Management Group LLP13,774$231.0K0.00%––
ProShare Advisors LLC13,470$225.0K0.00%––