Magnetar Capital Partners LP — SEC Form 4 filings
SEC reporting owner CIK 1353085. 141 Form 4 filings on record with FilingPulse; latest filed 2026-09-18.
Transaction summary — filings shown
Covers the 50 most recent of 141 filings on record, filed 2026-04-17 to 2026-09-18. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 535 legs across 25 filings — 18,354,691 shares, $2,216,723,183 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 364.
- Largest priced transaction: sale of 614,287 shares @ $118.57 ($72,836,010) in CoreWeave, Inc., filed 2026-04-17.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| CoreWeave, Inc. (CRWV) | 10% owner | 50 | — | 535 legs · 18,354,691 sh · $2,216,723,183 | 364 |
Form 4 filings — Magnetar Capital Partners LP
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-18 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Code (E): 881,551 (derivative) @ $0 · Code (E): 881,551 (derivative) @ $0 · Code (E): 115,575 (derivative) @ $0 · Code (E): 115,575 (derivative) @ $0 · Code (E): 11,949 (derivative) @ $0 · Code (E): 11,949 (derivative) @ $0 · +16 more | EDGAR |
| 2026-08-18 | 4/A | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 24,708 @ $108.48 · Sale (S): 4,912 @ $109.99 · Sale (S): 552 @ $110 · Sale (S): 24,743 @ $108.48 · Sale (S): 4,919 @ $109.99 · Sale (S): 553 @ $110 · +18 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 183,640 (derivative) @ $3,659,027 · Sale (S): 627,486 (derivative) @ $12,502,658.55 · Sale (S): 8,503 (derivative) @ $169,422.28 · Sale (S): 183,381 (derivative) @ $3,653,866.43 · Sale (S): 251,762 (derivative) @ $5,016,357.85 · Sale (S): 315,583 (derivative) @ $6,287,991.28 · +3 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 107,538 @ $107.64 · Sale (S): 61,199 @ $108.16 · Sale (S): 367,433 @ $107.64 · Sale (S): 209,134 @ $108.16 · Sale (S): 184,794 @ $107.64 · Sale (S): 105,180 @ $108.16 · +18 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 24,708 @ $108.48 · Sale (S): 4,912 @ $109.99 · Sale (S): 552 @ $110 · Sale (S): 24,743 @ $108.48 · Sale (S): 4,919 @ $109.99 · Sale (S): 553 @ $110 · +18 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 41,654 (derivative) @ $828,914.60 · Sale (S): 41,655 (derivative) @ $874,755 · Sale (S): 142,334 (derivative) @ $2,832,446.60 · Sale (S): 142,333 (derivative) @ $2,988,993 · Sale (S): 19,723 (derivative) @ $392,487.70 · Sale (S): 19,722 (derivative) @ $414,162 · +16 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 26,014 (derivative) @ $105.45 · Sale (S): 23,128 (derivative) @ $105.45 · Sale (S): 50,858 (derivative) @ $105.45 | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Holdings only — no transactions reported | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 26,085 @ $107.75 · Sale (S): 121,028 @ $110.98 · Sale (S): 29,301 @ $115.61 · Sale (S): 89,114 @ $107.75 · Sale (S): 413,543 @ $110.98 · Sale (S): 100,120 @ $115.61 · +21 more | EDGAR |
| 2026-08-14 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 49,361 (derivative) @ $106.75 · Sale (S): 21,637 (derivative) @ $106.75 · Sale (S): 22,246 (derivative) @ $106.75 · Sale (S): 96,524 (derivative) @ $106.75 · Sale (S): 10,232 (derivative) @ $106.75 | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Code (E): 587,701 (derivative) @ $0 · Code (E): 587,701 (derivative) @ $0 · Code (E): 77,050 (derivative) @ $0 · Code (E): 77,050 (derivative) @ $0 · Code (E): 7,966 (derivative) @ $0 · Code (E): 7,966 (derivative) @ $0 · +16 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Code (E): 91,114 (derivative) @ $0 · Code (E): 91,114 (derivative) @ $0 · Code (E): 414,002 (derivative) @ $0 · Code (E): 414,002 (derivative) @ $0 · Code (E): 54,277 (derivative) @ $0 · Code (E): 54,277 (derivative) @ $0 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Code (E): 30,371 (derivative) @ $0 · Code (E): 30,371 (derivative) @ $0 · Code (E): 138,001 (derivative) @ $0 · Code (E): 138,001 (derivative) @ $0 · Code (E): 18,092 (derivative) @ $0 · Code (E): 18,092 (derivative) @ $0 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Other (J): 12,149 · Other (J): 55,200 · Other (J): 7,237 · Other (J): 748 · Other (J): 16,132 · Other (J): 22,148 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Other (J): 4,167 · Other (J): 18,933 · Other (J): 2,482 · Other (J): 257 · Other (J): 5,533 · Other (J): 7,597 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Other (J): 24,297 · Other (J): 110,400 · Other (J): 14,474 · Other (J): 1,496 · Other (J): 32,265 · Other (J): 44,296 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Other (J): 12,149 · Other (J): 55,200 · Other (J): 7,237 · Other (J): 748 · Other (J): 16,132 · Other (J): 22,148 · +18 more | EDGAR |
| 2026-06-23 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Other (J): 7,745 · Other (J): 35,190 · Other (J): 4,614 · Other (J): 477 · Other (J): 10,284 · Other (J): 14,119 · +18 more | EDGAR |
| 2026-06-03 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 190,937 (derivative) @ $3,837,833.70 · Sale (S): 605,488 (derivative) @ $12,170,308.80 · Sale (S): 13,794 (derivative) @ $277,259.40 · Sale (S): 8,205 (derivative) @ $164,920.50 · Sale (S): 176,952 (derivative) @ $3,556,735.20 · Sale (S): 242,937 (derivative) @ $4,883,033.70 · +5 more | EDGAR |
| 2026-06-03 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 8,648 @ $130.22 · Sale (S): 2,369 @ $131.79 · Sale (S): 27,417 @ $130.22 · Sale (S): 7,506 @ $131.79 · Sale (S): 372 @ $130.21 · Sale (S): 104 @ $131.80 · +12 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 30,973 @ $134.51 · Sale (S): 3,936 @ $135.78 · Sale (S): 87,537 @ $136.85 · Sale (S): 54,883 @ $137.89 · Sale (S): 161 @ $138.63 · Sale (S): 98,279 @ $134.51 · +23 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 49,420 @ $134.51 · Sale (S): 6,279 @ $135.78 · Sale (S): 139,602 @ $136.85 · Sale (S): 87,534 @ $137.89 · Sale (S): 250 @ $138.63 · Sale (S): 42,035 @ $134.51 · +18 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 43,739 (derivative) @ $887,901.70 · Sale (S): 4,375 (derivative) @ $87,500 · Sale (S): 138,705 (derivative) @ $2,815,711.50 · Sale (S): 13,870 (derivative) @ $277,400 · Sale (S): 18,185 (derivative) @ $369,155.50 · Sale (S): 1,818 (derivative) @ $36,360 · +16 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 8,634 (derivative) @ $134.95 · Sale (S): 24,505 (derivative) @ $134.95 · Sale (S): 49,496 (derivative) @ $134.95 · Sale (S): 17,365 (derivative) @ $134.95 | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 66,918 @ $129.73 · Sale (S): 984 @ $130 · Sale (S): 1,475 @ $131 · Sale (S): 1,966 @ $132 · Sale (S): 1,966 @ $133 · Sale (S): 212,202 @ $129.73 · +24 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 90,784 @ $129.73 · Sale (S): 1,332 @ $130 · Sale (S): 1,999 @ $131 · Sale (S): 2,666 @ $132 · Sale (S): 2,666 @ $133 · Sale (S): 45,072 @ $129.73 · +9 more | EDGAR |
| 2026-05-08 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 23,166 (derivative) @ $126.35 · Sale (S): 20,244 (derivative) @ $126.35 · Sale (S): 46,590 (derivative) @ $126.35 | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 58,006 @ $126.52 · Sale (S): 60,360 @ $127.46 · Sale (S): 10,071 @ $128.86 · Sale (S): 8,704 @ $129.38 · Sale (S): 183,928 @ $126.52 · Sale (S): 191,379 @ $127.46 · +22 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 3,302 @ $126.52 · Sale (S): 3,439 @ $127.46 · Sale (S): 574 @ $128.87 · Sale (S): 496 @ $129.38 · Sale (S): 78,685 @ $126.52 · Sale (S): 81,879 @ $127.46 · +14 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 84,806 (derivative) @ $1,725,802.10 · Sale (S): 268,932 (derivative) @ $5,472,766.20 · Sale (S): 35,258 (derivative) @ $717,500.30 · Sale (S): 3,644 (derivative) @ $74,155.40 · Sale (S): 78,595 (derivative) @ $1,599,408.25 · Sale (S): 107,902 (derivative) @ $2,195,805.70 · +6 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 40,000 (derivative) @ $125.20 | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 5,079 @ $126.29 · Sale (S): 90,629 @ $127.49 · Sale (S): 10,083 @ $128.56 · Sale (S): 10,410 @ $129.11 · Sale (S): 16,086 @ $126.29 · Sale (S): 287,380 @ $127.49 · +22 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 6,883 @ $126.29 · Sale (S): 122,950 @ $127.49 · Sale (S): 13,676 @ $128.56 · Sale (S): 14,120 @ $129.11 · Sale (S): 4,239 @ $126.29 · Sale (S): 75,776 @ $127.49 · +10 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 26,244 (derivative) @ $524,880 · Sale (S): 83,223 (derivative) @ $1,664,460 · Sale (S): 10,911 (derivative) @ $218,220 · Sale (S): 1,128 (derivative) @ $22,560 · Sale (S): 24,321 (derivative) @ $486,420 · Sale (S): 33,391 (derivative) @ $667,820 · +5 more | EDGAR |
| 2026-05-06 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 50,000 (derivative) @ $127.00 | EDGAR |
| 2026-05-01 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 169,612 (derivative) @ $3,434,643 · Sale (S): 537,865 (derivative) @ $10,891,766.25 · Sale (S): 70,515 (derivative) @ $1,427,928.75 · Sale (S): 7,289 (derivative) @ $147,602.25 · Sale (S): 157,189 (derivative) @ $3,183,077.25 · Sale (S): 215,805 (derivative) @ $4,370,051.25 · +6 more | EDGAR |
| 2026-05-01 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 42,403 (derivative) @ $858,660.75 · Sale (S): 42,403 (derivative) @ $858,660.75 · Sale (S): 134,466 (derivative) @ $2,722,936.50 · Sale (S): 134,466 (derivative) @ $2,722,936.50 · Sale (S): 17,629 (derivative) @ $356,987.25 · Sale (S): 17,629 (derivative) @ $356,987.25 · +18 more | EDGAR |
| 2026-05-01 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 557 @ $117.84 · Sale (S): 1,764 @ $117.84 · Sale (S): 232 @ $117.84 · Sale (S): 24 @ $117.84 · Sale (S): 516 @ $117.84 · Sale (S): 708 @ $117.84 · +6 more | EDGAR |
| 2026-05-01 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 19,905 @ $119.20 · Sale (S): 96,195 @ $119.93 · Sale (S): 10,603 @ $121.10 · Sale (S): 63,082 @ $119.20 · Sale (S): 305,096 @ $119.93 · Sale (S): 33,616 @ $121.10 · +21 more | EDGAR |
| 2026-05-01 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 16,637 @ $119.20 · Sale (S): 80,437 @ $119.93 · Sale (S): 8,864 @ $121.10 · Sale (S): 13,400 @ $119.20 · Sale (S): 64,799 @ $119.93 · Sale (S): 7,140 @ $121.10 · +3 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Snyderman David J., Supernova Management LLC | Sale (S): 3,042 @ $118.31 · Sale (S): 13,039 @ $119.48 · Sale (S): 21,733 @ $120.27 · Sale (S): 4,347 @ $121 · Sale (S): 120,000 @ $122.06 · Sale (S): 36,077 @ $124 · +22 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 2,744 @ $118.31 · Sale (S): 11,761 @ $119.48 · Sale (S): 19,603 @ $120.27 · Sale (S): 3,921 @ $121 · Sale (S): 108,248 @ $122.06 · Sale (S): 32,541 @ $124 · +22 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 4,018 @ $118.31 · Sale (S): 17,219 @ $119.48 · Sale (S): 28,697 @ $120.27 · Sale (S): 5,739 @ $121 · Sale (S): 158,460 @ $122.06 · Sale (S): 47,637 @ $124 · +22 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 173,850 (derivative) @ $3,529,155 · Sale (S): 536,619 (derivative) @ $10,893,365.70 · Sale (S): 70,352 (derivative) @ $1,428,145.60 · Sale (S): 7,272 (derivative) @ $147,621.60 · Sale (S): 156,825 (derivative) @ $3,183,547.50 · Sale (S): 215,305 (derivative) @ $4,370,691.50 · +6 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 23,135 @ $122.09 · Sale (S): 2,607 @ $123.24 · Sale (S): 71,413 @ $122.09 · Sale (S): 8,049 @ $123.24 · Sale (S): 9,363 @ $122.09 · Sale (S): 1,056 @ $123.24 · +18 more | EDGAR |
| 2026-04-24 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 242 @ $119.56 · Sale (S): 742 @ $119.56 · Sale (S): 98 @ $119.56 · Sale (S): 11 @ $119.56 · Sale (S): 217 @ $119.56 · Sale (S): 298 @ $119.56 · +6 more | EDGAR |
| 2026-04-22 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 27,802 @ $117.33 · Sale (S): 85,812 @ $117.33 · Sale (S): 11,251 @ $117.33 · Sale (S): 1,164 @ $117.33 · Sale (S): 25,078 @ $117.33 · Sale (S): 34,433 @ $117.33 · +6 more | EDGAR |
| 2026-04-22 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 28,117 @ $118.26 · Sale (S): 86,783 @ $118.26 · Sale (S): 11,376 @ $118.26 · Sale (S): 1,179 @ $118.26 · Sale (S): 25,361 @ $118.26 · Sale (S): 34,817 @ $118.26 · +6 more | EDGAR |
| 2026-04-17 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 15,211 @ $117.79 · Sale (S): 199,009 @ $118.57 · Sale (S): 48,883 @ $119.34 · Sale (S): 46,955 @ $117.79 · Sale (S): 614,287 @ $118.57 · Sale (S): 150,886 @ $119.34 · +21 more | EDGAR |
| 2026-04-17 | 4 | CoreWeave, Inc. (CRWV) jointly with Magnetar Financial LLC, Supernova Management LLC, Snyderman David J. | Sale (S): 12,382 @ $117.79 · Sale (S): 161,969 @ $118.57 · Sale (S): 39,783 @ $119.34 · Sale (S): 9,974 @ $117.79 · Sale (S): 130,474 @ $118.57 · Sale (S): 32,049 @ $119.34 · +3 more | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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