Octave Specialty Group Inc. 13F holders
149 funds reported a position in Octave Specialty Group Inc. in their 13F for the quarter ended 30 June 2026, together 30.1 million shares worth $187.6 million. Against the quarter before, 35 opened a position, 50 added, 40 trimmed and 34 sold out; together they sold a net 2.1 million shares. The largest holders: BlackRock, Inc., Western Standard LLC and Vanguard Capital Management LLC.
Funds holding149+1 on Q1 2026
Shares they held30.1Mworth $187.6 million
Net sold on the quarter2.1M sharesabout $13.3 million at the funds' values
Funds buying to selling85 to 74opened or added, to cut or sold
Opened 35Added 50Held 23Trimmed 40Sold out 34
What each fund did in OSG against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in OSG in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,405 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 26 reported a position in Octave Specialty Group Inc.: 4 opened one, 10 added, 5 trimmed and 7 sold out, a net 278,710 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 5 reported a position in Octave Specialty Group Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 1.1 million shares worth $6.9 million, 0.0% of its reported book. Sold out: Point72 Asset Management. In the quarter, 2 funds added or opened a position and 4 trimmed or sold out; together they sold a net 257,633 shares, about $1.6 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 1,106,335 | $6.9 million | 0.0% | +83,897 | added | 30 June 2026 | 13F |
| Citadel Advisors | 422,777 | $2.6 million | 0.0% | -9,032 | trimmed | 30 June 2026 | 13F |
| Renaissance Technologies | 117,200 | $731,328 | 0.0% | -110,526 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 19,610 | $122,366 | 0.0% | -115,478 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 8,156 | $50,894 | 0.0% | +7,162 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 0 | $0 | 0.0% | -113,656 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 4,572,516 | 15.21% | $28.5 million | 0.00% | +654,718 | 13F |
| Western Standard LLC | 2,247,591 | 7.47% | $14.0 million | 4.75% | no change | 13F |
| Vanguard Capital Management LLC | 1,972,619 | 6.56% | $12.3 million | 0.00% | +27,543 | 13F |
| Prescott Group Capital Management, L.L.C. | 1,647,793 | 5.48% | $10.3 million | 0.89% | +55,206 | 13F |
| Third Avenue Management LLC | 1,341,879 | 4.46% | $8.4 million | 1.34% | +668 | 13F |
| Bain Capital Credit, LP | 1,108,012 | 3.68% | $6.9 million | 1.88% | no change | 13F |
| Geode Capital Management, LLC | 1,106,335 | 3.68% | $6.9 million | 0.00% | +83,897 | 13F |
| State Street Corp. | 898,673 | 2.99% | $5.6 million | 0.00% | -42,731 | 13F |
| Dimensional Fund Advisors LP | 716,947 | 2.38% | $4.5 million | 0.00% | -593,185 | 13F |
| Jacobs Levy Equity Management, Inc. | 649,530 | 2.16% | $4.1 million | 0.01% | -234,742 | 13F |
| Marshall Wace, LLP | 601,796 | 2.00% | $3.8 million | 0.00% | -463,539 | 13F |
| Zacks Investment Management | 590,370 | 1.96% | $3.7 million | 0.03% | new | 13F |
| Bracebridge Capital, LLC | 579,234 | 1.93% | $3.6 million | 0.79% | no change | 13F |
| Morgan Stanley | 569,563 | 1.89% | $3.6 million | 0.00% | +334,317 | 13F |
| Goldman Sachs Group Inc. | 560,756 | 1.86% | $3.5 million | 0.00% | +214,463 | 13F |
| RIHO Partners, LLC | 554,818 | 1.85% | $3.5 million | 1.95% | +8,249 | 13F |
| Essex Investment Management Co. LLC | 539,289 | 1.79% | $3.4 million | 0.44% | +121,086 | 13F |
| Gendell Jeffrey L | 494,092 | 1.64% | $3.1 million | 0.03% | -919,120 | 13F |
| Wolf Hill Capital Management, LP | 480,187 | 1.60% | $3.0 million | 0.29% | -990,147 | 13F |
| Nuveen, LLC | 428,165 | 1.42% | $2.7 million | 0.00% | -372,088 | 13F |
| Citadel Advisors LLC | 422,777 | 1.41% | $2.6 million | 0.00% | -9,032 | 13F |
| Caption Management, LLC | 419,136 | 1.39% | $2.6 million | 0.09% | -223,461 | 13F |
| Vanguard Portfolio Management LLC | 392,350 | 1.30% | $2.4 million | 0.00% | +96,450 | 13F |
| Charles Schwab Investment Management Inc. | 377,869 | 1.26% | $2.4 million | 0.00% | +82,525 | 13F |
| Northern Trust Corp. | 352,680 | 1.17% | $2.2 million | 0.00% | +30,332 | 13F |
| IPG Investment Advisors LLC | 303,930 | 1.01% | $1.9 million | 0.27% | -21,686 | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 302,913 | 1.01% | $1.9 million | 0.00% | +158,612 | 13F |
| Vanguard Fiduciary Trust Co. | 295,841 | 0.98% | $1.8 million | 0.00% | +21,279 | 13F |
| AYAL Capital Advisors Ltd | 280,000 | 0.93% | $1.7 million | 0.90% | new | 13F |
| Jane Street Group, LLC | 278,731 | 0.93% | $1.7 million | 0.00% | -485,653 | 13F |
| Raymond James Financial Inc. | 239,680 | 0.80% | $1.5 million | 0.00% | +214,024 | 13F |
| AQR Capital Management LLC | 229,890 | 0.76% | $1.4 million | 0.00% | +180,062 | 13F |
| Prudential Financial Inc. | 226,010 | 0.75% | $1.4 million | 0.00% | +155,900 | 13F |
| Tudor Investment Corp. Et Al | 216,362 | 0.72% | $1.4 million | 0.01% | +56,399 | 13F |
| Harbor Advisors LLC | 196,382 | 0.65% | $1.2 million | 0.15% | no change | 13F |
| Russell Investments Group, Ltd. | 195,046 | 0.65% | $1.2 million | 0.00% | +13,775 | 13F |
| Quantinno Capital Management LP | 190,283 | 0.63% | $1.2 million | 0.00% | +141,583 | 13F |
| Legato Capital Management LLC | 181,037 | 0.60% | $1.1 million | 0.09% | +50,277 | 13F |
| UBS Group AG | 147,197 | 0.49% | $918,509 | 0.00% | -117,083 | 13F |
| Gsa Capital Partners LLP | 143,566 | 0.48% | $896,000 | 0.06% | new | 13F |
| Susquehanna International Group, LLP | 136,692 | 0.45% | $852,958 | 0.00% | -253,501 | 13F |
| Bank of New York Mellon Corp | 134,966 | 0.45% | $842,185 | 0.00% | +4,495 | 13F |
| Bank of America Corp. | 131,360 | 0.44% | $819,686 | 0.00% | -124,750 | 13F |
| Invesco Ltd. | 127,868 | 0.43% | $797,896 | 0.00% | -23,174 | 13F |
| Bridgeway Capital Management, LLC | 122,504 | 0.41% | $764,425 | 0.01% | -60,000 | 13F |
| Diametric Capital, LP | 118,364 | 0.39% | $738,591 | 0.08% | new | 13F |
| Renaissance Technologies LLC | 117,200 | 0.39% | $731,328 | 0.00% | -110,526 | 13F |
| Wells Fargo & Company | 116,707 | 0.39% | $728,250 | 0.00% | +61,383 | 13F |
| Price T Rowe Associates Inc. | 116,612 | 0.39% | $728,000 | 0.00% | +14,647 | 13F |
| HSBC Holdings PLC | 114,498 | 0.38% | $723,547 | 0.00% | +12,068 | 13F |
The 50 largest of the 149 funds that reported a position in OSG in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on OSG
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 68,200 | $425,568 | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 39,500 | $246,480 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 30 October 2026 | 13G/A | Vanguard Capital Management and 1 other | 2.2 million | 4.8% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 October 2026 | 13G | BlackRock Portfolio Management LLC and 1 other | 2.9 million | 6.5% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 31 July 2026 | 13G | Vanguard Capital Management and 1 other | 2.3 million | 5.0% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 11 May 2026 | 13G/A | Jane Street Group, LLC and 7 others | 771,384 | 1.7% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 11 May 2026 | 13G/A | Western Standard LLC and 1 other | 2.2 million | 5.0% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 12 February 2026 | 13G | Western Standard LLC and 1 other | 2.6 million | 5.9% | 20 November 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 11 February 2026 | 13G | Jane Street Group, LLC and 7 others | 2.4 million | 5.4% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 13 November 2025 | 13G/A | G1 Execution Services, LLC and 5 others | 1.0 million | 2.2% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 27 August 2026 | 2,157 | $4.60 | SEC |
| 20 August 2026 | 2,000 | $4.54 | SEC |
| 19 August 2026 | 2,000 | $4.59 | SEC |
| 22 July 2026 | 285 | $5.95 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.