BLRK — Institutional owners (13F)
Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.
| Institution | Value | Shares | % of tracked 13F | Type |
|---|---|---|---|---|
| Magnetar Financial LLC | $7,983,920 | 799,992 | 5.78% | Shares |
| AQR Arbitrage LLC | $7,488,373 | 750,338 | 5.43% | Shares |
| Linden Advisors LP | $7,485,000 | 750,000 | 5.42% | Shares |
| MILLENNIUM MANAGEMENT LLC | $5,988,000 | 600,000 | 4.34% | Shares |
| ARISTEIA CAPITAL, L.L.C. | $5,095,888 | 510,610 | 3.69% | Shares |
| PICTON MAHONEY ASSET MANAGEMENT | $4,990,001 | 500,000 | 3.62% | Shares |
| Alberta Investment Management Corp | $4,990,000 | 500,000 | 3.62% | Shares |
| Polar Asset Management Partners Inc. | $4,990,000 | 500,000 | 3.62% | Shares |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $4,989,980 | 499,998 | 3.62% | Shares |
| BNP PARIBAS FINANCIAL MARKETS | $4,650,371 | 465,969 | 3.37% | Shares |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $4,491,000 | 450,000 | 3.25% | Shares |
| WOLVERINE ASSET MANAGEMENT LLC | $4,193,297 | 420,170 | 3.04% | Shares |
| Wealthspring Capital LLC | $4,180,502 | 418,888 | 3.03% | Shares |
| Radcliffe Capital Management, L.P. | $3,996,301 | 400,431 | 2.90% | Shares |
| MMCAP International Inc. SPC | $3,992,000 | 400,000 | 2.89% | Shares |
| TENOR CAPITAL MANAGEMENT Co., L.P. | $3,992,000 | 400,000 | 2.89% | Shares |
| Periscope Capital Inc. | $3,992,000 | 400,000 | 2.89% | Shares |
| L1 Global Manager Pty Ltd | $3,493,000 | 350,000 | 2.53% | Shares |
| Verition Fund Management LLC | $3,493,000 | 350,000 | 2.53% | Shares |
| Hudson Bay Capital Management LP | $3,492,980 | 349,998 | 2.53% | Shares |
| First Trust Capital Management L.P. | $3,323,729 | 333,039 | 2.41% | Shares |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | $3,017,970 | 299,997 | 2.19% | Shares |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $2,994,000 | 300,000 | 2.17% | Shares |
| Kryger Capital LLC | $2,748,312 | 275,382 | 1.99% | Shares |
| TWO SIGMA INVESTMENTS, LP | $2,713,313 | 271,875 | 1.97% | Shares |
| Context Capital Management, LLC | $2,495,000 | 250,000 | 1.81% | Shares |
| WHITEBOX ADVISORS LLC | $2,180,880 | 218,525 | 1.58% | Shares |
| Shaolin Capital Management LLC | $2,148,944 | 215,325 | 1.56% | Shares |
| Meteora Capital, LLC | $1,881,759 | 188,553 | 1.36% | Shares |
| Quarry LP | $1,746,500 | 175,000 | 1.27% | Shares |
| Clear Street Group Inc. | $1,635,473 | 163,875 | 1.18% | Shares |
| SONA ASSET MANAGEMENT (US) LLC | $1,497,000 | 150,000 | 1.08% | Shares |
| MOORE CAPITAL MANAGEMENT, LP | $1,497,000 | 150,000 | 1.08% | Shares |
| Lineage Point Capital LP | $1,437,120 | 144,000 | 1.04% | Shares |
| GRITSTONE ASSET MANAGEMENT LLC | $1,247,500 | 125,000 | 0.90% | Shares |
| Cable Car Capital, LP | $998,020 | 100,002 | 0.72% | Shares |
| TIG Advisors, LLC | $998,000 | 100,000 | 0.72% | Shares |
| HEIGHTS CAPITAL MANAGEMENT, INC | $998,000 | 100,000 | 0.72% | Shares |
| BERKLEY W R CORP | $989,098 | 99,108 | 0.72% | Shares |
| Karpus Management, Inc. | $848,300 | 85,000 | 0.61% | Shares |
| MIZUHO SECURITIES USA LLC | $689,207 | 69,267 | 0.50% | Shares |
| Arax Advisory Partners | $566,824 | 56,796 | 0.41% | Shares |
| ABC ARBITRAGE SA | $349,300 | 35,000 | 0.25% | Shares |
| StoneX Group Inc. | $299,410 | 30,001 | 0.22% | Shares |
| Crossingbridge Advisors, LLC | $299,400 | 30,000 | 0.22% | Shares |
| Centiva Capital, LP | $249,500 | 25,000 | 0.18% | Shares |
| Schonfeld Strategic Advisors LLC | $99,809 | 10,001 | 0.07% | Shares |
| STATE OF WISCONSIN INVESTMENT BOARD | $99,800 | 10,000 | 0.07% | Shares |
| Mint Tower Capital Management B.V. | $6,487 | 650,000 | 0.00% | Shares |
| GLAZER CAPITAL, LLC | $4,605 | 461,439 | 0.00% | Shares |
| MORGAN STANLEY | $299 | 30 | 0.00% | Shares |
| Virtu Financial LLC | $204 | 20,429 | 0.00% | Shares |
| Kepos Capital LP | $75 | 7,500 | 0.00% | Shares |