OCTAVE SPECIALTY GROUP INC (OSG) — Institutional Holders, Q2 2026
148 institutional investment managers reported a OSG position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $187.6M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
OSG in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- BlackRockAdded · +654,718 sh+$4.1M
- ZACKS INVESTMENT MANAGEMENTNew · +590,370 sh+$3.7M
- MORGAN STANLEYAdded · +334,317 sh+$2.1M
- AYAL Capital Advisors LtdNew · +280,000 sh+$1.7M
- GOLDMAN SACHS GROUPAdded · +214,463 sh+$1.3M
Biggest sellers
- Wolf Hill Capital ManagementTrimmed · -990,147 sh-$6.2M
- GENDELL JEFFREY LTrimmed · -919,120 sh-$5.7M
- DIMENSIONAL FUND ADVISORSTrimmed · -593,185 sh-$3.7M
- JANE STREET GROUPTrimmed · -485,653 sh-$3.0M
- MARSHALL WACE, LLPTrimmed · -463,539 sh-$2.9M
OSG 13F holders ranked 1–100 of 148
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 4,572,516 sh | 4,572,516 | $28.5M | <0.01% | +16.7% |
| 2 | Western Standard#2 · 2,247,591 sh | 2,247,591 | $14.0M | 4.75% | 0.0% |
| 3 | VANGUARD CAPITAL MANAGEMENT#3 · 1,972,619 sh | 1,972,619 | $12.3M | <0.01% | +1.4% |
| 4 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.#4 · 1,647,793 sh | 1,647,793 | $10.3M | 0.89% | +3.5% |
| 5 | THIRD AVENUE MANAGEMENT#5 · 1,341,879 sh | 1,341,879 | $8.4M | 1.34% | 0.0% |
| 6 | Bain Capital Credit#6 · 1,108,012 sh | 1,108,012 | $6.9M | 1.88% | 0.0% |
| 7 | GEODE CAPITAL MANAGEMENT#7 · 1,106,335 sh | 1,106,335 | $6.9M | <0.01% | +8.2% |
| 8 | STATE STREET#8 · 898,673 sh | 898,673 | $5.6M | <0.01% | -4.5% |
| 9 | DIMENSIONAL FUND ADVISORS#9 · 716,947 sh | 716,947 | $4.5M | <0.01% | -45.3% |
| 10 | JACOBS LEVY EQUITY MANAGEMENT#10 · 649,530 sh | 649,530 | $4.1M | 0.01% | -26.5% |
| 11 | MARSHALL WACE, LLP#11 · 601,796 sh | 601,796 | $3.8M | <0.01% | -43.5% |
| 12 | ZACKS INVESTMENT MANAGEMENT#12 · 590,370 sh | 590,370 | $3.7M | 0.03% | New |
| 13 | Bracebridge Capital#13 · 579,234 sh | 579,234 | $3.6M | 0.07% | 0.0% |
| 14 | MORGAN STANLEY#14 · 569,563 sh | 569,563 | $3.6M | <0.01% | +142.1% |
| 15 | GOLDMAN SACHS GROUP#15 · 560,756 sh | 560,756 | $3.5M | <0.01% | +61.9% |
| 16 | RIHO Partners#16 · 554,818 sh | 554,818 | $3.5M | 1.95% | +1.5% |
| 17 | ESSEX INVESTMENT MANAGEMENT#17 · 539,289 sh | 539,289 | $3.4M | — | +29.0% |
| 18 | GENDELL JEFFREY L#18 · 494,092 sh | 494,092 | $3.1M | 0.03% | -65.0% |
| 19 | Wolf Hill Capital Management#19 · 480,187 sh | 480,187 | $3.0M | 0.25% | -67.3% |
| 20 | Nuveen#20 · 428,165 sh | 428,165 | $2.7M | <0.01% | -46.5% |
| 21 | CITADEL ADVISORS#21 · 422,777 sh | 422,777 | $2.6M | <0.01% | -2.1% |
| 22 | Caption Management#22 · 419,136 sh | 419,136 | $2.6M | 0.01% | -34.8% |
| 23 | VANGUARD PORTFOLIO MANAGEMENT#23 · 392,350 sh | 392,350 | $2.4M | <0.01% | +32.6% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT#24 · 377,869 sh | 377,869 | $2.4M | <0.01% | +27.9% |
| 25 | NORTHERN#25 · 352,680 sh | 352,680 | $2.2M | <0.01% | +9.4% |
| 26 | IPG Investment Advisors#26 · 303,930 sh | 303,930 | $1.9M | 0.27% | -6.7% |
| 27 | Connor, Clark & Lunn Investment Management Ltd.#27 · 302,913 sh | 302,913 | $1.9M | <0.01% | +109.9% |
| 28 | VANGUARD FIDUCIARY#28 · 295,841 sh | 295,841 | $1.8M | <0.01% | +7.8% |
| 29 | AYAL Capital Advisors Ltd#29 · 280,000 sh | 280,000 | $1.7M | 0.47% | New |
| 30 | JANE STREET GROUP#30 · 278,731 sh | 278,731 | $1.7M | <0.01% | -63.5% |
| 31 | RAYMOND JAMES FINANCIAL#31 · 239,680 sh | 239,680 | $1.5M | <0.01% | +834.2% |
| 32 | AQR CAPITAL MANAGEMENT#32 · 229,890 sh | 229,890 | $1.4M | <0.01% | +361.4% |
| 33 | PRUDENTIAL FINANCIAL#33 · 226,010 sh | 226,010 | $1.4M | <0.01% | +222.4% |
| 34 | TUDOR INVESTMENT ET AL#34 · 216,362 sh | 216,362 | $1.4M | <0.01% | +35.3% |
| 35 | Harbor Advisors#35 · 196,382 sh | 196,382 | $1.2M | 0.15% | 0.0% |
| 36 | Russell Investments Group, Ltd.#36 · 195,046 sh | 195,046 | $1.2M | <0.01% | +7.6% |
| 37 | Quantinno Capital Management#37 · 190,283 sh | 190,283 | $1.2M | <0.01% | +290.7% |
| 38 | Legato Capital Management#38 · 181,037 sh | 181,037 | $1.1M | 0.09% | +38.4% |
| 39 | UBS Group AG#39 · 147,197 sh | 147,197 | $918.5K | <0.01% | -44.3% |
| 40 | GSA CAPITAL PARTNERS LLP#40 · 143,566 sh | 143,566 | $896.0K | 0.06% | New |
| 41 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#41 · 136,692 sh | 136,692 | $853.0K | <0.01% | -65.0% |
| 42 | Bank of New York Mellon#42 · 134,966 sh | 134,966 | $842.2K | <0.01% | +3.4% |
| 43 | BANK OF AMERICA#43 · 131,360 sh | 131,360 | $819.7K | <0.01% | -48.7% |
| 44 | Invesco Ltd.#44 · 127,868 sh | 127,868 | $797.9K | <0.01% | -15.3% |
| 45 | BRIDGEWAY CAPITAL MANAGEMENT#45 · 122,504 sh | 122,504 | $764.4K | 0.01% | -32.9% |
| 46 | Diametric Capital#46 · 118,364 sh | 118,364 | $738.6K | 0.08% | New |
| 47 | RENAISSANCE TECHNOLOGIES#47 · 117,200 sh | 117,200 | $731.3K | <0.01% | -48.5% |
| 48 | WELLS FARGO & COMPANY#48 · 116,707 sh | 116,707 | $728.3K | <0.01% | +111.0% |
| 49 | PRICE T ROWE ASSOCIATES#49 · 116,612 sh | 116,612 | $728.0K | <0.01% | +14.4% |
| 50 | HSBC PLC#50 · 114,498 sh | 114,498 | $723.5K | <0.01% | +11.8% |
| 51 | SEI INVESTMENTS#51 · 109,389 sh | 109,389 | $682.6K | <0.01% | -29.9% |
| 52 | CLIFFORD CAPITAL PARTNERS#52 · 107,676 sh | 107,676 | $671.9K | 0.09% | New |
| 53 | AMERICAN CENTURY COMPANIES#53 · 91,000 sh | 91,000 | $567.8K | <0.01% | -24.5% |
| 54 | Man Group plc#54 · 66,579 sh | 66,579 | $415.5K | <0.01% | New |
| 55 | Vanguard Global Advisers#55 · 63,120 sh | 63,120 | $393.9K | <0.01% | +238.4% |
| 56 | PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO#56 · 61,305 sh | 61,305 | $382.5K | <0.01% | -10.9% |
| 57 | GWN SECURITIES#57 · 60,295 sh | 60,295 | $376.2K | 0.06% | +65.6% |
| 58 | AMERIPRISE FINANCIAL#58 · 58,504 sh | 58,504 | $365.1K | <0.01% | -49.1% |
| 59 | FJ Capital Management#59 · 57,937 sh | 57,937 | $361.5K | 0.05% | New |
| 60 | State of Wyoming#60 · 55,733 sh | 55,733 | $347.8K | 0.04% | +93.6% |
| 61 | Empowered Funds#61 · 54,004 sh | 54,004 | $337.0K | <0.01% | -52.6% |
| 62 | RHUMBLINE ADVISERS#62 · 53,481 sh | 53,481 | $333.7K | <0.01% | -0.1% |
| 63 | BARCLAYS PLC#63 · 49,637 sh | 49,637 | $309.7K | <0.01% | -12.9% |
| 64 | LOS ANGELES CAPITAL MANAGEMENT#64 · 47,883 sh | 47,883 | $298.8K | <0.01% | New |
| 65 | LAZARD ASSET MANAGEMENT#65 · 43,331 sh | 43,331 | $270.4K | <0.01% | +48.3% |
| 66 | DEUTSCHE BANK AG\#66 · 40,359 sh | 40,359 | $251.8K | <0.01% | +31.9% |
| 67 | ALLIANCEBERNSTEIN L.P.#67 · 42,630 sh | 42,630 | $198.2K | <0.01% | +13.6% |
| 68 | Mariner#68 · 30,584 sh | 30,584 | $190.8K | <0.01% | New |
| 69 | STATE OF WISCONSIN INVESTMENT BOARD#69 · 30,044 sh | 30,044 | $187.5K | <0.01% | +29.8% |
| 70 | MERCER GLOBAL ADVISORS#70 · 29,288 sh | 29,288 | $182.8K | <0.01% | +116.9% |
| 71 | Cerity Partners#71 · 26,828 sh | 26,828 | $167.4K | <0.01% | New |
| 72 | Engineers Gate Manager#72 · 25,500 sh | 25,500 | $159.1K | <0.01% | -74.6% |
| 73 | MetLife Investment Management#73 · 24,501 sh | 24,501 | $152.9K | <0.01% | +230.2% |
| 74 | ENVESTNET ASSET MANAGEMENT#74 · 24,244 sh | 24,244 | $151.3K | 0.00% | New |
| 75 | KLCM Advisors#75 · 23,900 sh | 23,900 | $149.1K | 0.01% | 0.0% |
| 76 | GROUP ONE TRADING, L.P.#76 · 22,576 sh | 22,576 | $140.9K | <0.01% | +89.0% |
| 77 | BNP PARIBAS FINANCIAL MARKETS#77 · 21,554 sh | 21,554 | $134.5K | 0.00% | +159.7% |
| 78 | Mraz, Amerine & Associates#78 · 21,450 sh | 21,450 | $133.8K | 0.02% | 0.0% |
| 79 | Gator Capital Management#79 · 20,935 sh | 20,935 | $130.6K | 0.03% | -2.3% |
| 80 | MILLENNIUM MANAGEMENT#80 · 19,610 sh | 19,610 | $122.4K | 0.00% | -85.5% |
| 81 | Impact Capital Partners#81 · 19,516 sh | 19,516 | $121.8K | — | New |
| 82 | CITIGROUP#82 · 19,080 sh | 19,080 | $119.1K | 0.00% | +55.8% |
| 83 | MIRAE ASSET GLOBAL ETFS Ltd.#83 · 19,044 sh | 19,044 | $118.8K | <0.01% | +4.2% |
| 84 | Inscription Capital#84 · 19,037 sh | 19,037 | $118.8K | 0.01% | New |
| 85 | JPMORGAN CHASE#85 · 18,668 sh | 18,668 | $118.7K | 0.00% | -93.0% |
| 86 | XTX Topco Ltd#86 · 18,657 sh | 18,657 | $116.4K | <0.01% | -84.0% |
| 87 | Metis Global Partners#87 · 14,334 sh | 14,334 | $89.4K | <0.01% | 0.0% |
| 88 | WEALTH ENHANCEMENT ADVISORY SERVICES#88 · 14,061 sh | 14,061 | $84.6K | — | New |
| 89 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM#89 · 12,630 sh | 12,630 | $78.8K | <0.01% | 0.0% |
| 90 | Atria Investments#90 · 12,473 sh | 12,473 | $77.8K | — | New |
| 91 | MANUFACTURERS LIFE INSURANCE COMPANY, THE#91 · 12,414 sh | 12,414 | $77.5K | <0.01% | +14.6% |
| 92 | Corient Private Wealth#92 · 12,270 sh | 12,270 | $76.6K | <0.01% | New |
| 93 | D. E. Shaw#93 · 12,207 sh | 12,207 | $76.2K | 0.00% | -5.1% |
| 94 | IEQ CAPITAL#94 · 12,203 sh | 12,203 | $76.1K | <0.01% | New |
| 95 | Police & Firemen's Retirement System of New Jersey#95 · 11,825 sh | 11,825 | $73.8K | <0.01% | 0.0% |
| 96 | Jump Financial#96 · 11,644 sh | 11,644 | $72.7K | <0.01% | -83.5% |
| 97 | SG Americas Securities#97 · 11,203 sh | 11,203 | $70.0K | 0.00% | -40.5% |
| 98 | Crown Wealth Group#98 · 11,162 sh | 11,162 | $69.7K | — | 0.0% |
| 99 | McGlone Suttner Wealth Management#99 · 10,911 sh | 10,911 | $68.1K | — | New |
| 100 | AXQ CAPITAL#100 · 10,652 sh | 10,652 | $66.5K | <0.01% | -31.0% |
Funds that sold out of OSG in Q2 2026 (36)
Held OSG at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Arrowpoint Investment Partners (Singapore) Pte. Ltd.139,168 sh | 139,168 | $647.1K |
| Point72 Asset Management, L.P.113,656 sh | 113,656 | $528.5K |
| Cruiser Capital Advisors108,798 sh | 108,798 | $505.9K |
| Squarepoint Ops76,907 sh | 76,907 | $357.6K |
| Walleye Capital67,134 sh | 67,134 | $312.2K |
| HRT FINANCIAL50,974 sh | 50,974 | $237.0K |
| ACADIAN ASSET MANAGEMENT42,930 sh | 42,930 | $199.0K |
| Quantbot Technologies38,708 sh | 38,708 | $180.0K |
| Commonwealth Financial Services29,008 sh | 29,008 | $134.9K |
| CIBC Asset Management23,893 sh | 23,893 | $111.1K |
| Empirical Asset Management23,440 sh | 23,440 | $109.0K |
| Park Capital Management, / WI21,262 sh | 21,262 | $98.9K |
| Brevan Howard Capital Management18,197 sh | 18,197 | $84.6K |
| Quotient Wealth Partners16,896 sh | 16,896 | $78.6K |
| ANCHYRA PARTNERS16,328 sh | 16,328 | $75.9K |
| Centiva Capital16,085 sh | 16,085 | $74.8K |
| Able Wealth Management15,246 sh | 15,246 | $70.9K |
| DAYMARK WEALTH PARTNERS14,596 sh | 14,596 | $67.9K |
| Verition Fund Management13,500 sh | 13,500 | $62.8K |
| AIRE ADVISORS13,446 sh | 13,446 | $62.5K |
| Graham Capital Management, L.P.13,053 sh | 13,053 | $60.7K |
| QUADRANT CAPITAL GROUP3,144 sh | 3,144 | $56.3K |
| Symmetry Partners11,007 sh | 11,007 | $51.2K |
| IMC-Chicago10,897 sh | 10,897 | $50.7K |
| UNITED CAPITAL FINANCIAL ADVISORS10,405 sh | 10,405 | $48.4K |
| SIMPLEX TRADING9,458 sh | 9,458 | $44.0K |
| Parallel Advisors6,473 sh | 6,473 | $30.1K |
| FEDERATED HERMES4,420 sh | 4,420 | $20.6K |
| MAI Capital Management1,064 sh | 1,064 | $4.9K |
| Bell Investment Advisors293 sh | 293 | $1.4K |
| Bare Financial Services87 sh | 87 | $405.00 |
| GAMMA Investing72 sh | 72 | $335.00 |
| Western Wealth Management35 sh | 35 | $163.00 |
| Legacy Wealth Managment25 sh | 25 | $117.00 |
| Root Financial Partners22 sh | 22 | $102.00 |
| Advisory Services Network20 sh | 20 | $93.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.