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Filing Flows › Octave Specialty Group (OSG) › Who owns the stock

Who owns Octave Specialty Group (OSG) stock

137 funds reported Octave Specialty Group (OSG) shares in their latest 13F filings, worth $197M in all. The largest holder is BlackRock ($28.5M). Last quarter 81 funds added to their stakes and 65 cut them.

Largest holders of OSG (13F)Largest holders of OSG (13F)BlackRock$28.5MVanguard Group$19.5MWestern Standard LLC$14.0MVanguard Capital Management LLC$12.3MThird Avenue Management LLC$8.4MPrescott Group Capital Management…$8.0MBain Capital Credit, LP$6.9MGeode Capital Management, LLC$6.9MState Street$5.6MRepertoire Partners LP$5.1M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock4,572,516$28.5Mincrease2026-06-30
Vanguard Group2,508,395$19.5Mdecrease2025-12-31
Western Standard LLC2,247,591$14.0Munchanged2026-06-30
Vanguard Capital Management LLC1,972,619$12.3Mincrease2026-06-30
Third Avenue Management LLC1,341,879$8.4Mincrease2026-06-30
Prescott Group Capital Management, L.L.C.1,930,145$8.0Mincrease2026-09-30
Bain Capital Credit, LP1,108,012$6.9Munchanged2026-06-30
Geode Capital Management, LLC1,106,335$6.9Mincrease2026-06-30
State Street898,673$5.6Mdecrease2026-06-30
Repertoire Partners LP721,188$5.1Mdecrease2025-06-30
Dimensional Fund Advisors LP716,947$4.5Mdecrease2026-06-30
Jacobs Levy Equity Management649,530$4.1Mdecrease2026-06-30
Marshall Wace, LLP601,796$3.8Mdecrease2026-06-30
Bracebridge Capital, LLC579,234$3.6Munchanged2026-06-30
Morgan Stanley569,563$3.6Mincrease2026-06-30

Octave Specialty Group's latest quarter

Octave Specialty Group, Q2 2026: revenue $83.0M (+51% year over year), operating margin -14.1%, net loss $12.2M, operating cash flow −$10.2M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most OSG stock?

By the latest 13F filings: BlackRock ($28.5M); Vanguard Group ($19.5M); Western Standard LLC ($14.0M); Vanguard Capital Management LLC ($12.3M); Third Avenue Management LLC ($8.4M).

What is the short interest in OSG?

1,362,927 shares were sold short at the 2026-10-15 settlement, -3.32% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.