13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q1 2026. See the latest, Q2 2026 →
Reported value
$9.84B
−3.5% on the quarter before
Positions
1,130
608 new · 374 sold out
Top 10
55.7%
of the value
Est. gain
−$191.8M
on stocks held all quarter
Est. return
−2.6%
on those stocks since Q4 2025
Positions as of Mar 31, 2026, from Magnetar Financial LLC's 13F filing with the SEC. A 13F lists a manager's US-listed stocks and options at a quarter end and is filed up to 45 days later, so the fund may hold something else today. It leaves out short positions, cash and holdings outside the US.
Portfolio at a glance
- New
- Added
- Cut
- Same
- Options
The 24 largest positions, 65% of the reported value, each sized by its share, colored by what the fund did with it since Q4 2025. Striped tiles are options.
Largest buys
Since Q4 2025, by estimated size: the change in shares at the quarter-end price, since a 13F gives no trade prices. Percentages are the position's share of the portfolio, before and after.
- Penumbra Inc~$82.6MNew · 0.0% → 0.8%+251,433 shares
- Webster Finl Corp~$78.4MAdded · 0.0% → 0.8%+1,129,140 shares
- Allied Gold Corp~$78.1MNew · 0.0% → 0.8%+2,518,867 shares
- Masimo Corp~$75.0MAdded · 0.0% → 0.8%+421,626 shares
- Microchip Technology~$58.9MNew · 0.0% → 0.6%+1,025,000 shares
- Tri Pointe Homes Inc~$52.4MAdded · 0.0% → 0.6%+1,121,833 shares
- Silicon Labs~$51.2MNew · 0.0% → 0.5%+245,824 shares
- Valaris Ltd~$47.0MAdded · 0.0% → 0.5%+479,264 shares
- National Storage Affiliates~$46.4MNew · 0.0% → 0.5%+1,228,472 shares
- Arcellx Inc~$45.3MNew · 0.0% → 0.5%+394,931 shares
Largest sells
Since Q4 2025, by estimated size: the change in shares at the quarter-end price, since a 13F gives no trade prices. Percentages are the position's share of the portfolio, before and after.
- Comerica Inc~$99.1MSold out · 1.0% → 0.0%−1,139,969 shares
- Rev Group Inc~$97.8MSold out · 1.0% → 0.0%−1,608,032 shares
- Frontier Communications Pare~$89.2MSold out · 0.9% → 0.0%−2,343,223 shares
- Cyberark Software Ltd~$89.0MSold out · 0.9% → 0.0%−199,487 shares
- Tegna Inc~$84.5MSold out · 0.8% → 0.0%−4,355,886 shares
- Avidity Biosciences Inc~$83.6MSold out · 0.8% → 0.0%−1,158,603 shares
- Confluent Inc~$79.5MSold out · 0.8% → 0.0%−2,630,482 shares
- Exact Sciences Corp~$71.9MSold out · 0.7% → 0.0%−708,272 shares
- Staar Surgical Co~$57.1MSold out · 0.6% → 0.0%−2,472,390 shares
- Anywhere Real Estate Inc~$56.0MSold out · 0.5% → 0.0%−3,956,298 shares
Holdings
As of Mar 31, 2026. Changes are in shares against Dec 31, 2025, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CoreWeaveCOM CL A · shares +0.5% · price −3.4% | 48.2% | $4.74B | −$166.7M | ||||||||
| Air Lease CorpCL A · shares −15% · price +1.1% | 0.89% | $87.2M | +$952,983 | ||||||||
| Chart Inds IncCOM · shares −16% · price +0.3% | 0.88% | $86.9M | +$218,610 | ||||||||
| Txnm Energy IncCOM · shares −13% · price −0.7% | 0.88% | $86.2M | −$619,558 | ||||||||
| Penumbra IncCOM · shares New | 0.84% | $82.6M | — | ||||||||
| Warner Bros Discovery IncCOM SER A · shares −5.2% · price −6.0% | 0.83% | $81.7M | −$5.2M | ||||||||
| Proassurance CorpCOM · shares −6.8% · price +2.3% | 0.82% | $80.3M | +$1.8M | ||||||||
| KenvueCOM · shares −13% · price −0.1% | 0.81% | $79.4M | −$46,057 | ||||||||
| Webster Finl CorpCOM · shares +14,912% · price +10.3% | 0.80% | $78.9M | +$49,066 | ||||||||
| Allied Gold CorpCOM NEW · shares New | 0.79% | $78.1M | — | ||||||||
| Norfolk SouthernCOM · shares −20% · price −2.2% | 0.79% | $77.7M | −$1.8M | ||||||||
| Teck Resources LtdCL B · shares −20% · price +8.1% | 0.79% | $77.5M | +$5.8M | ||||||||
| Masimo CorpCOM · shares +7,729% · price +36.8% | 0.77% | $76.0M | +$260,804 | ||||||||
| JD.comNOTE 0.250% 6/0 · shares +27% · price −0.1% | 0.76% | $74.6M | — | ||||||||
| Trip.comNOTE 0.750% 6/1 · shares +11% · price −16.1% | 0.73% | $71.6M | — | ||||||||
| Digitalbridge Group IncCL A NEW · shares +91% · price +0.5% | 0.66% | $65.0M | +$176,313 | ||||||||
| Csg Sys Intl IncCOM · shares +0.4% · price +4.2% | 0.66% | $64.5M | +$2.6M | ||||||||
| PG&E CorporationNOTE 4.250%12/0 · shares +57% · price +0.8% | 0.62% | $61.3M | — | ||||||||
| Hewlett Packard Enterprise7.625 MAND CONV · shares +85% · price −1.8% | 0.61% | $60.3M | −$600,000 | ||||||||
| Microchip TechnologyDEP SHS REPSTG · shares New | 0.60% | $58.9M | — | ||||||||
| Amicus TherapeuticCOM · shares +0.5% · price +1.5% | 0.59% | $57.6M | +$872,941 | ||||||||
| Tri Pointe Homes IncCOM · shares +1,684% · price +48.5% | 0.56% | $55.5M | +$1.0M | ||||||||
| Silicon LabsCOM · shares New | 0.52% | $51.2M | — | ||||||||
| Essential Utils IncCOM · shares +0.4% · price +5.0% | 0.49% | $48.5M | +$2.3M | ||||||||
| Valaris LtdCL A · shares +5,972% · price +94.5% | 0.49% | $47.8M | +$382,311 | ||||||||
| Total · 1,130 positions | 100% | $9.84B | −$191.8M |
Price is a stock's reported value over its shares at the quarter end. The estimated gain is the shares held at both quarter ends times the change in that price: shares bought or sold during the quarter add nothing, options are left out, and a stock split is read into the earlier share count and price.
What made money
From Q4 2025 to Q1 2026: 516 stocks held throughout, down $191.8M (−2.6%).
- Veeco+$6.7M+18%
- Teck Resources Ltd+$5.8M+8%
- Albemarle Corporation+$3.3M+22%
- Csg Sys Intl Inc+$2.6M+4%
- Essential Utils Inc+$2.3M+5%
- Procap Finl Inc−$4.6M−42%
- Warner Bros Discovery Inc−$5.2M−6%
- Rithm Ppty Tr Inc−$5.2M−19%
- Ares Management−$5.3M−28%
- CoreWeave−$166.7M−3%
Estimated as in the holdings table: shares held at both quarter ends times the change in price; options left out.
Reported value by quarter
The total value of each quarter's 13F at that quarter end. It moves with prices as well as with buying and selling. Pick a quarter to see what the fund held then.
Every quarter's filing
| Quarter | Reported value | Filing | |
|---|---|---|---|
| Q2 2026 | Aug 14, 2026 | $10.96B+11% | SEC ↗ |
| Q1 2026 | May 13, 2026 | $9.84B−4% | SEC ↗ |
| Q4 2025 | Feb 17, 2026 | $10.21B−38% | SEC ↗ |
| Q3 2025 | Nov 13, 2025 | $16.50B−20% | SEC ↗ |
| Q2 2025 | Aug 12, 2025 | $20.65B+171% | SEC ↗ |
| Q1 2025 | May 15, 2025 | $7.61B+75% | SEC ↗ |
| Q4 2024 | Feb 11, 2025 | $4.36B−6% | SEC ↗ |
| Q3 2024 | Nov 13, 2024 | $4.62B−4% | SEC ↗ |
| Q2 2024 | Aug 14, 2024 | $4.80B+7% | SEC ↗ |
| Q1 2024 | May 15, 2024 | $4.47B+13% | SEC ↗ |
| Q4 2023 | Feb 13, 2024 | $3.94B+1% | SEC ↗ |
| Q3 2023 | Nov 14, 2023 | $3.92B−14% | SEC ↗ |
| Q2 2023 | Aug 11, 2023 | $4.56B−11% | SEC ↗ |
| Q1 2023 | May 15, 2023 | $5.13B−13% | SEC ↗ |
| Q4 2022 | Feb 14, 2023 | $5.91B−18% | SEC ↗ |
| Q3 2022 | Nov 14, 2022 | $7.21B−25% | SEC ↗ |
| Q2 2022 | Aug 15, 2022 | $9.67B+3% | SEC ↗ |
| Q1 2022 | May 16, 2022 | $9.37B−6% | SEC ↗ |
| Q4 2021 | Feb 14, 2022 | $9.96B+1% | SEC ↗ |
| Q3 2021 | Jan 14, 2022 (amended) | $9.82B−7% | SEC ↗ |
| Q2 2021 | Aug 6, 2021 | $10.56B+2% | SEC ↗ |
| Q1 2021 | May 14, 2021 | $10.40B+47% | SEC ↗ |
| Q4 2020 | Feb 12, 2021 | $7.08B+25% | SEC ↗ |
| Q3 2020 | Nov 16, 2020 | $5.66B+67% | SEC ↗ |
| Q2 2020 | Aug 14, 2020 | $3.39B−18% | SEC ↗ |
| Q1 2020 | May 15, 2020 | $4.15B−13% | SEC ↗ |
| Q4 2019 | Feb 13, 2020 | $4.79B+22% | SEC ↗ |
| Q3 2019 | Nov 14, 2019 | $3.93B−21% | SEC ↗ |
| Q2 2019 | Aug 14, 2019 | $5.00B+29% | SEC ↗ |
| Q1 2019 | May 15, 2019 | $3.89B−5% | SEC ↗ |
| Q4 2018 | Feb 14, 2019 | $4.08B−26% | SEC ↗ |
| Q3 2018 | Feb 14, 2019 (amended) | $5.54B−16% | SEC ↗ |
| Q2 2018 | Aug 14, 2018 (amended) | $6.56B+13% | SEC ↗ |
| Q1 2018 | May 15, 2018 (amended) | $5.80B+3% | SEC ↗ |
| Q4 2017 | Feb 14, 2018 (amended) | $5.62B+2% | SEC ↗ |
| Q3 2017 | Nov 14, 2017 (amended) | $5.52B−15% | SEC ↗ |
| Q2 2017 | Aug 14, 2017 (amended) | $6.52B−7% | SEC ↗ |
| Q1 2017 | May 15, 2017 (amended) | $7.02B+1,897% | SEC ↗ |
| Q4 2016 | Aug 14, 2017 (amended) | $351.5M−95% | SEC ↗ |
| Q3 2016 | Nov 14, 2016 (amended) | $7.03B+17% | SEC ↗ |
| Q2 2016 | Aug 15, 2016 (amended) | $6.02B−7% | SEC ↗ |
| Q1 2016 | May 16, 2016 (amended) | $6.49B | SEC ↗ |