Magnetar Financial LLC — 13F Holdings & Portfolio
CIK 1352851 · latest 13F-HR filed 2026-05-13
Magnetar Financial LLC manages $9.84B in 13F-reported U.S. long-equity assets across 1,755 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are CRWV (48.17%), AL (0.61%), GTLS (0.61%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 607 new positions, exited 373, added to 147, and trimmed 248.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$9.84B
Long-equity book
1,755
Distinct positions
2026-03-31
Filed 2026-05-13
+607 / −373 / ↑147 / ↓248
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- WEBSTER FINL CORP$78.4M +16457.6%
- MASIMO CORP$75.3M +10607.2%
- TRI POINTE HOMES INC$53.4M +2549.2%
- VALARIS LTD$47.4M +11711.8%
- DIGITALBRIDGE GROUP INC$31.2M +92.3%
Top Trims
- SHIFT4 PMTS INC-$46.8M -85.5%
- MARA HOLDINGS INC-$34.0M -84.6%
- ARES MANAGEMENT CORPORATION-$31.8M -69.5%
- ALIBABA GROUP HLDG LTD-$21.7M -32.3%
- NORFOLK SOUTHN CORP-$21.6M -21.8%
New Positions
- PENUMBRA INC$82.6M
- ALLIED GOLD CORP$78.1M
- MICROCHIP TECHNOLOGY INC.$58.9M
- SILICON LABORATORIES INC$51.2M
- NATIONAL STORAGE AFFILIATES$46.4M
Exited Positions
- COMERICA INC$99.1M
- REV GROUP INC$97.8M
- FRONTIER COMMUNICATIONS PARE$89.2M
- CYBERARK SOFTWARE LTD$89.0M
- TEGNA INC$84.5M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | COREWEAVE INC | CRWV | 21873S108 | $4.74B | 48.17% | 68,566,394 | SH |
| 2 | AIR LEASE CORP | AL | 00912X302 | $60.3M | 0.61% | 929,069 | SH |
| 3 | CHART INDS INC | GTLS | 16115Q308 | $60.0M | 0.61% | 290,155 | SH |
| 4 | TXNM ENERGY INC | TXNM | 69349H107 | $59.7M | 0.61% | 1,020,802 | SH |
| 5 | WARNER BROS DISCOVERY INC | WBD | 934423104 | $57.2M | 0.58% | 2,111,152 | SH |
| 6 | PENUMBRA INC | PEN | 70975L107 | $57.1M | 0.58% | 173,910 | SH |
| 7 | TRIP COM GROUP LTD | TRPCF | 89677QAB3 | $55.8M | 0.57% | 54,089,000 | PRN |
| 8 | PROASSURANCE CORP | PRA | 74267C106 | $55.6M | 0.56% | 2,248,489 | SH |
| 9 | ALLIED GOLD CORP | AAUC | 01921D204 | $54.9M | 0.56% | 1,772,193 | SH |
| 10 | KENVUE INC | KVUE | 49177J102 | $54.8M | 0.56% | 3,179,289 | SH |
| 11 | WEBSTER FINL CORP | WBS | 947890109 | $53.7M | 0.55% | 773,847 | SH |
| 12 | TECK RESOURCES LTD | TECK | 878742204 | $52.7M | 0.54% | 1,019,038 | SH |
| 13 | JD.COM INC | JD | 47215PAJ5 | $52.4M | 0.53% | 52,442,000 | PRN |
| 14 | MASIMO CORP | MASI | 574795100 | $52.0M | 0.53% | 292,130 | SH |
| 15 | NORFOLK SOUTHN CORP | NSC | 655844108 | $52.0M | 0.53% | 184,038 | SH |
| 16 | CSG SYS INTL INC | CSGS | 126349109 | $48.5M | 0.49% | 606,753 | SH |
| 17 | DIGITALBRIDGE GROUP INC | DBRG | 25401T603 | $47.3M | 0.48% | 3,068,178 | SH |
| 18 | AMICUS THERAPEUTIC | FOLD | 03152W109 | $41.9M | 0.43% | 2,901,032 | SH |
| 19 | HEWLETT PACKARD ENTERPRISE C | HPEPC | 42824C208 | $41.1M | 0.42% | 630,276 | SH |
| 20 | TRI POINTE HOMES INC | TPH | 87265H109 | $37.9M | 0.38% | 810,388 | SH |
| 21 | PG&E CORP | PCG | 69331CAL2 | $36.6M | 0.37% | 35,313,000 | PRN |
| 22 | MICROCHIP TECHNOLOGY INC. | MCHPP | 595017302 | $36.5M | 0.37% | 634,273 | SH |
| 23 | ESSENTIAL UTILS INC | WTRG | 29670G102 | $36.4M | 0.37% | 904,525 | SH |
| 24 | SILICON LABORATORIES INC | SLAB | 826919102 | $34.5M | 0.35% | 165,916 | SH |
| 25 | VALARIS LTD | VAL | G9460G101 | $32.9M | 0.33% | 335,831 | SH |
| 26 | VEECO INSTRS INC DEL | VECO | 922417100 | $32.7M | 0.33% | 966,151 | SH |
| 27 | NATIONAL STORAGE AFFILIATES | NSA | 637870106 | $32.0M | 0.32% | 847,189 | SH |
| 28 | ARCELLX INC | ACLX | 03940C100 | $31.0M | 0.31% | 270,031 | SH |
| 29 | UNIFIRST CORP MASS | UNF | 904708104 | $29.8M | 0.30% | 118,529 | SH |
| 30 | QORVO INC | QRVO | 74736K101 | $29.3M | 0.30% | 378,444 | SH |
| 31 | ALIBABA GROUP HLDG LTD | BABAF | 01609WBG6 | $29.2M | 0.30% | 21,000,000 | PRN |
| 32 | LIBERTY BROADBAND CORP | LBRDK | 530307305 | $28.8M | 0.29% | 573,064 | SH |
| 33 | CHURCHILL CAP CORP XI | CCXI | G2131A108 | $27.4M | 0.28% | 2,700,000 | SH |
| 34 | DRUGS MADE IN AMER ACQ II CO | DMII | G2851K104 | $26.9M | 0.27% | 2,700,000 | SH |
| 35 | CHART INDS INC | GTLS | 16115Q308 | $26.9M | 0.27% | 130,249 | SH |
| 36 | AIR LEASE CORP | AL | 00912X302 | $26.8M | 0.27% | 413,161 | SH |
| 37 | TXNM ENERGY INC | TXNM | 69349H107 | $26.6M | 0.27% | 454,336 | SH |
| 38 | THERMON GROUP HLDGS INC | THR | 88362T103 | $25.8M | 0.26% | 511,601 | SH |
| 39 | NORFOLK SOUTHN CORP | NSC | 655844108 | $25.7M | 0.26% | 91,123 | SH |
| 40 | PENUMBRA INC | PEN | 70975L107 | $25.5M | 0.26% | 77,523 | SH |
| 41 | EQV VENTURES AC CORP. II | EVAC | G3106Q102 | $25.2M | 0.26% | 2,499,993 | SH |
| 42 | WEBSTER FINL CORP | WBS | 947890109 | $25.2M | 0.26% | 362,865 | SH |
| 43 | TECK RESOURCES LTD | TECK | 878742204 | $24.8M | 0.25% | 478,796 | SH |
| 44 | PROASSURANCE CORP | PRA | 74267C106 | $24.7M | 0.25% | 997,946 | SH |
| 45 | PG&E CORP | PCG | 69331CAL2 | $24.6M | 0.25% | 23,708,000 | PRN |
| 46 | KENVUE INC | KVUE | 49177J102 | $24.6M | 0.25% | 1,426,309 | SH |
| 47 | WARNER BROS DISCOVERY INC | WBD | 934423104 | $24.5M | 0.25% | 905,940 | SH |
| 48 | APELLIS PHARMACEUTICALS INC | APLS | 03753U106 | $24.1M | 0.24% | 599,445 | SH |
| 49 | MASIMO CORP | MASI | 574795100 | $24.0M | 0.24% | 134,951 | SH |
| 50 | ALLIED GOLD CORP | AAUC | 01921D204 | $23.1M | 0.24% | 746,674 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-13 | $9.84B | 1,755 | 0001104659-26-059841 |
| 2025-12-31 | 2026-02-17 | $10.21B | 1,486 | 0001104659-26-015538 |
| 2025-09-30 | 2025-11-13 | $16.50B | 1,474 | 0001104659-25-111094 |