13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q4 2022. See the latest, Q2 2026 →
Reported value
$5.91B
−18% on the quarter before
Positions
767
185 new · 774 sold out
Top 10
16.0%
of the value
Est. gain
+$155.4M
on stocks held all quarter
Est. return
+3.8%
on those stocks since Q3 2022
Positions as of Dec 31, 2022, 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, 31% of the reported value, each sized by its share, colored by what the fund did with it since Q3 2022. Striped tiles are options.
Largest buys
Since Q3 2022, 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.
- Iaa Inc~$103.9MNew · 0.0% → 1.8%+2,597,785 shares
- Aerojet Rocketdyne Hldgs Inc~$101.3MNew · 0.0% → 1.7%+1,812,029 shares
- Horizon Therapeutics Pub L~$89.1MNew · 0.0% → 1.5%+783,065 shares
- Altra Indl Motion Corp~$79.5MNew · 0.0% → 1.3%+1,330,998 shares
- Albertsons Cos Inc~$76.8MNew · 0.0% → 1.3%+3,702,240 shares
- Centene Corp Del~$65.8MAdded · 0.1% → 1.3%+802,824 shares
- Encompass Health Corp~$41.6MAdded · 0.6% → 1.7%+694,916 shares
- Poshmark Inc~$40.8MNew · 0.0% → 0.7%+2,283,107 shares
- Gilead Sciences Inc~$39.3MNew · 0.0% → 0.7%+457,834 shares
- Sanofi~$35.9MNew · 0.0% → 0.6%+740,712 shares
Largest sells
Since Q3 2022, 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.
- Change Healthcare Inc~$113.1MSold out · 1.6% → 0.0%−4,114,962 shares
- Duke Realty Corp~$83.0MSold out · 1.2% → 0.0%−1,721,792 shares
- Yamana Gold Inc~$69.7MSold out · 1.0% → 0.0%−15,393,077 shares
- Kkr Acquisition Holding I Co~$65.3MSold out · 0.9% → 0.0%−6,636,488 shares
- Rogers Corp~$59.3MSold out · 0.8% → 0.0%−245,313 shares
- Global Blood Therapeutics In~$56.5MSold out · 0.8% → 0.0%−829,531 shares
- Biohaven Pharmactl Hldg Co L~$54.9MSold out · 0.8% → 0.0%−363,372 shares
- Chemocentryx Inc~$52.0MSold out · 0.7% → 0.0%−1,007,047 shares
- Turquoise Hill Res Ltd~$47.2MSold out · 0.7% → 0.0%−1,594,611 shares
- Amerisourcebergen Corp~$46.2MSold out · 0.6% → 0.0%−341,448 shares
Holdings
As of Dec 31, 2022. Changes are in shares against Sep 30, 2022, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Churchill Capital Corp ViiCOM CL A · shares 0% · price +1.4% | 1.9% | $110.3M | +$1.5M | ||||||||
| Iaa IncCOM · shares New | 1.8% | $103.9M | — | ||||||||
| Aerojet Rocketdyne Hldgs IncCOM · shares New | 1.7% | $101.3M | — | ||||||||
| Encompass Health CorpCOM · shares +71% · price +32.2% | 1.7% | $100.5M | +$14.4M | ||||||||
| Vmware IncCL A COM · shares −3.8% · price +15.3% | 1.7% | $98.6M | +$13.1M | ||||||||
| Pnm Res IncCOM · shares −3.0% · price +6.7% | 1.6% | $93.1M | +$5.8M | ||||||||
| Horizon Therapeutics Pub LSHS · shares New | 1.5% | $89.1M | — | ||||||||
| Shaw Communications IncCL B CONV · shares −4.8% · price +18.5% | 1.5% | $86.2M | +$13.5M | ||||||||
| Boston Scientific CorpCOM · shares −28% · price +19.5% | 1.4% | $83.9M | +$13.7M | ||||||||
| Altra Indl Motion CorpCOM · shares New | 1.3% | $79.5M | — | ||||||||
| Spirit Airls IncCOM · shares −4.0% · price +3.5% | 1.3% | $79.5M | +$2.7M | ||||||||
| Albertsons Cos IncCOMMON STOCK · shares New | 1.3% | $76.8M | — | ||||||||
| Centene Corp DelCOM · shares +689% · price +5.4% | 1.3% | $75.4M | +$489,482 | ||||||||
| Lhc Group IncCOM · shares −31% · price −1.2% | 1.2% | $72.3M | −$881,138 | ||||||||
| Meridian Bioscience IncCOM · shares −3.3% · price +5.3% | 1.2% | $72.2M | +$3.7M | ||||||||
| First Horizon CorporationCOM · shares −5.1% · price +7.0% | 1.2% | $69.1M | +$4.5M | ||||||||
| Cowen IncCL A NEW · shares −3.0% · price −0.1% | 1.0% | $61.1M | −$31,552 | ||||||||
| Gsk PlcSPONSORED ADR · shares +33% · price +19.4% | 1.0% | $60.3M | +$7.4M | ||||||||
| Activision Blizzard IncCOM · shares −7.5% · price +3.0% | 1.0% | $60.2M | +$1.7M | ||||||||
| Cooper Cos IncCOM NEW · shares +24% · price +25.3% | 1.0% | $60.1M | +$9.8M | ||||||||
| Elanco Animal Health IncCOM · shares +2.4% · price −1.5% | 1.0% | $59.1M | −$898,019 | ||||||||
| Merck & Co IncCOM · shares −35% · price +28.8% | 0.94% | $55.3M | +$12.4M | ||||||||
| Black Knight IncCOM · shares −36% · price −4.6% | 0.90% | $53.1M | −$2.6M | ||||||||
| Signify Health IncCL A COM · shares −34% · price −1.7% | 0.88% | $52.0M | −$889,974 | ||||||||
| 1life Healthcare IncCOM · shares −21% · price −2.6% | 0.88% | $52.0M | −$1.4M | ||||||||
| Total · 767 positions | 100% | $5.91B | +$155.4M |
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 Q3 2022 to Q4 2022: 555 stocks held throughout, up $155.4M (+3.8%).
- Encompass Health Corp+$14.4M+32%
- Boston Scientific Corp+$13.7M+19%
- Shaw Communications Inc+$13.5M+18%
- Vmware Inc+$13.1M+15%
- Merck & Co Inc+$12.4M+29%
- Black Knight Inc−$2.6M−5%
- Brooge Energy Ltd−$5.4M−32%
- Multiplan Corporation−$6.8M−60%
- Irobot Corp−$8.7M−15%
- Algonquin Pwr Utils Corp−$8.9M−37%
Estimated as in the holdings table: shares held at both quarter ends times the change in price; options left out, 2 splits read into the share counts.
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 ↗ |