13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q3 2025. See the latest, Q2 2026 →
Reported value
$16.50B
−20% on the quarter before
Positions
853
405 new · 422 sold out
Top 10
73.4%
of the value
Est. gain
−$2.14B
on stocks held all quarter
Est. return
−13.9%
on those stocks since Q2 2025
Positions as of Sep 30, 2025, 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
Each tile is a position, sized by its share, colored by what the fund did with it since Q2 2025. Striped tiles are options.
Largest buys
Since Q2 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.
- Norfolk Southn Corp~$107.6MNew · 0.0% → 0.7%+358,330 shares
- Cyberark Software Ltd~$102.1MNew · 0.0% → 0.6%+211,240 shares
- Air Lease Corp~$100.5MNew · 0.0% → 0.6%+1,579,485 shares
- Merus N V~$98.4MNew · 0.0% → 0.6%+1,045,209 shares
- Wns Holdings Ltd~$83.8MNew · 0.0% → 0.5%+1,098,809 shares
- Tegna Inc~$82.9MAdded · 0.0% → 0.5%+4,078,275 shares
- Chart Inds Inc~$76.5MNew · 0.0% → 0.5%+382,078 shares
- Verona Pharma Plc~$67.0MNew · 0.0% → 0.4%+628,260 shares
- Steelcase Inc~$59.4MNew · 0.0% → 0.4%+3,452,916 shares
- Dayforce Inc~$52.3MNew · 0.0% → 0.3%+759,407 shares
Largest sells
Since Q2 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.
- CoreWeave~$1.89BCut · 75.7% → 68.0%−13,834,923 shares
- Dun & Bradstreet Hldgs Inc~$96.7MSold out · 0.5% → 0.0%−10,636,170 shares
- Springworks Therapeutics Inc~$96.5MSold out · 0.5% → 0.0%−2,052,642 shares
- Blueprint Medicines Corp~$93.6MSold out · 0.5% → 0.0%−730,047 shares
- Skechers U S A Inc~$89.4MSold out · 0.4% → 0.0%−1,416,775 shares
- Ansys Inc~$88.4MSold out · 0.4% → 0.0%−251,751 shares
- Juniper Networks Inc~$83.8MSold out · 0.4% → 0.0%−2,099,555 shares
- Azek Co Inc~$80.4MSold out · 0.4% → 0.0%−1,479,488 shares
- Championx Corporation~$68.7MSold out · 0.3% → 0.0%−2,765,396 shares
- Faro Technologies Inc~$65.1MSold out · 0.3% → 0.0%−1,483,329 shares
Holdings
As of Sep 30, 2025. Changes are in shares against Jun 30, 2025, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CoreWeaveCOM CL A · shares −14% · price −16.1% | 68.0% | $11.22B | −$2.15B | ||||||||
| AlibabaNOTE 0.500% 6/0 · shares +28% · price +44.0% | 0.73% | $120.8M | — | ||||||||
| Norfolk Southn CorpCOM · shares New | 0.65% | $107.6M | — | ||||||||
| Cyberark Software LtdSHS · shares New | 0.62% | $102.1M | — | ||||||||
| Air Lease CorpCL A · shares New | 0.61% | $100.5M | — | ||||||||
| Merus N VCOM · shares New | 0.60% | $98.4M | — | ||||||||
| Txnm Energy IncCOM · shares +2.4% · price −0.0% | 0.58% | $95.5M | −$33,001 | ||||||||
| KellanovaCOM · shares +2.4% · price +3.1% | 0.57% | $93.8M | +$2.8M | ||||||||
| Avidxchange Holdings IncCOM · shares +0.2% · price +1.6% | 0.51% | $84.2M | +$1.4M | ||||||||
| Tegna IncCOM · shares +6,588% · price +21.3% | 0.51% | $84.2M | +$221,005 | ||||||||
| Wns Holdings LtdCOM · shares New | 0.51% | $83.8M | — | ||||||||
| Interpublic Group Cos IncCOM · shares +1.4% · price +14.0% | 0.51% | $83.4M | +$10.1M | ||||||||
| Frontier Communications PareCOM · shares +2.3% · price +2.6% | 0.50% | $83.3M | +$2.1M | ||||||||
| Mr Cooper Group IncCOM · shares +2.3% · price +41.3% | 0.50% | $82.2M | +$23.5M | ||||||||
| Chart Inds IncCOM · shares New | 0.46% | $76.5M | — | ||||||||
| Trip Com Group LtdNOTE 0.750% 6/1 · shares +16% · price +14.8% | 0.46% | $75.6M | — | ||||||||
| Proassurance CorpCOM · shares +2.3% · price +5.1% | 0.44% | $72.6M | +$3.4M | ||||||||
| Verona Pharma PlcSPONSORED ADS · shares New | 0.41% | $67.0M | — | ||||||||
| Steelcase IncCL A · shares New | 0.36% | $59.4M | — | ||||||||
| Jd.Com IncNOTE 0.250% 6/0 · shares +13% · price +2.8% | 0.35% | $58.3M | — | ||||||||
| Pg&E CorpNOTE 4.250%12/0 · shares −14% · price +2.0% | 0.32% | $53.2M | — | ||||||||
| Dayforce IncCOM · shares New | 0.32% | $52.3M | — | ||||||||
| Shift4 Pmts Inc6 SER A CNV PREF · shares +970% · price −17.7% | 0.31% | $50.8M | −$1.0M | ||||||||
| Liberty Broadband CorpCOM SER C · shares +2.4% · price −35.4% | 0.28% | $46.5M | −$24.9M | ||||||||
| Tourmaline Bio IncCOM · shares New | 0.28% | $46.2M | — | ||||||||
| Total · 853 positions | 100% | $16.50B | −$2.14B |
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 Q2 2025 to Q3 2025: 430 stocks held throughout, down $2.14B (−13.9%).
- Mr Cooper Group Inc+$23.5M+41%
- Interpublic Group Cos Inc+$10.1M+14%
- Proassurance Corp+$3.4M+5%
- Cross Ctry Healthcare Inc+$2.8M+9%
- Kellanova+$2.8M+3%
- Morningstar Inc−$2.3M−26%
- M3brigade Acquisition V Corp−$2.7M−15%
- Wheeler Real Estate Invt Tr−$3.0M−10%
- Liberty Broadband Corp−$24.9M−35%
- CoreWeave−$2.15B−16%
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 ↗ |