13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q4 2019. See the latest, Q2 2026 →
Reported value
$4.79B
+22% on the quarter before
Positions
524
239 new · 185 sold out
Top 10
40.5%
of the value
Est. gain
+$144.4M
on stocks held all quarter
Est. return
+5.5%
on those stocks since Q3 2019
Positions as of Dec 31, 2019, 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, 63% of the reported value, each sized by its share, colored by what the fund did with it since Q3 2019. Striped tiles are options.
Largest buys
Since Q3 2019, 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.
- Td Ameritrade Hldg Corp~$195.3MNew · 0.0% → 4.1%+3,929,094 shares
- Tiffany & Co New~$188.3MNew · 0.0% → 3.9%+1,408,622 shares
- Wright Med Group N V~$183.5MNew · 0.0% → 3.8%+6,020,854 shares
- Medicines Co~$160.8MNew · 0.0% → 3.4%+1,892,832 shares
- Audentes Therapeutics Inc~$95.4MNew · 0.0% → 2.0%+1,594,605 shares
- Ra Pharmaceuticals Inc~$86.3MNew · 0.0% → 1.8%+1,838,506 shares
- Fitbit Inc~$80.3MNew · 0.0% → 1.7%+12,219,993 shares
- Kemet Corp~$77.8MNew · 0.0% → 1.6%+2,875,899 shares
- Stars Group Inc~$53.9MNew · 0.0% → 1.1%+2,066,132 shares
- Interxion Holding N.V~$48.7MNew · 0.0% → 1.0%+581,215 shares
Largest sells
Since Q3 2019, 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.
- Celgene Corp~$172.4MSold out · 4.4% → 0.0%−1,736,172 shares
- Versum Matls Inc~$130.6MSold out · 3.3% → 0.0%−2,467,458 shares
- Medidata Solutions Inc~$91.6MSold out · 2.3% → 0.0%−1,001,356 shares
- Spark Therapeutics Inc~$75.8MSold out · 1.9% → 0.0%−782,108 shares
- Milacron Hldgs Corp~$64.2MSold out · 1.6% → 0.0%−3,848,437 shares
- Wellcare Health Plans Inc~$48.6MCut · 5.4% → 4.6%−147,097 shares
- Gannett Co Inc~$46.7MSold out · 1.2% → 0.0%−4,345,346 shares
- Legacy Tex Finl Group Inc~$43.6MSold out · 1.1% → 0.0%−1,001,876 shares
- Carrizo Oil & Gas Inc~$42.0MSold out · 1.1% → 0.0%−4,891,397 shares
- Genomic Health Inc~$32.8MSold out · 0.8% → 0.0%−483,143 shares
Holdings
As of Dec 31, 2019. Changes are in shares against Sep 30, 2019, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Allergan PlcSHS · shares −5.9% · price +13.6% | 5.1% | $243.0M | +$29.1M | ||||||||
| Wellcare Health Plans IncCOM · shares −18% · price +27.4% | 4.6% | $221.4M | +$47.6M | ||||||||
| Caesars Entmt CorpCOM · shares +0.1% · price +16.6% | 4.2% | $202.7M | +$28.9M | ||||||||
| Td Ameritrade Hldg CorpCOM · shares New | 4.1% | $195.3M | — | ||||||||
| Wabco Hldgs IncCOM · shares −3.4% · price +1.3% | 4.0% | $193.5M | +$2.5M | ||||||||
| Tiffany & Co NewCOM · shares New | 3.9% | $188.3M | — | ||||||||
| Wright Med Group N VORD SHS · shares New | 3.8% | $183.5M | — | ||||||||
| Cypress Semiconductor CorpCOM · shares +0.2% · price −0.0% | 3.7% | $178.2M | −$76,152 | ||||||||
| Mellanox Technologies LtdSHS · shares −2.4% · price +6.9% | 3.6% | $172.2M | +$11.2M | ||||||||
| Medicines CoCOM · shares New | 3.4% | $160.8M | — | ||||||||
| Acacia Communications IncCOM · shares −2.5% · price +3.7% | 2.7% | $128.5M | +$4.6M | ||||||||
| Advanced Disp Svcs Inc DelCOM · shares −2.3% · price +0.9% | 2.2% | $106.3M | +$970,383 | ||||||||
| Audentes Therapeutics IncCOM · shares New | 2.0% | $95.4M | — | ||||||||
| Ra Pharmaceuticals IncCOM · shares New | 1.8% | $86.3M | — | ||||||||
| UberCOM · shares −13% · price +3.8% | 1.8% | $85.1M | +$3.1M | ||||||||
| Sprint CorporationCOM · shares −16% · price −15.6% | 1.8% | $85.0M | −$15.7M | ||||||||
| Fitbit IncCL A · shares New | 1.7% | $80.3M | — | ||||||||
| Kemet CorpCOM NEW · shares New | 1.6% | $77.8M | — | ||||||||
| Energy Transfer LpCOM UT LTD PTN · shares +23% · price −1.9% | 1.3% | $61.7M | −$977,778 | ||||||||
| Stars Group IncCOM · shares New | 1.1% | $53.9M | — | ||||||||
| Churchill Cap Corp IiUNIT 99/99/9999 · shares 0% · price +2.6% | 1.1% | $53.9M | +$1.3M | ||||||||
| Interxion Holding N.VSHS · shares New | 1.0% | $48.7M | — | ||||||||
| Arqule IncCOM · shares New | 0.99% | $47.6M | — | ||||||||
| Continental Bldg Prods IncCOM · shares New | 0.98% | $46.9M | — | ||||||||
| Envista Hldgs CorpCOM · shares +160% · price +6.3% | 0.74% | $35.6M | +$815,140 | ||||||||
| Total · 524 positions | 100% | $4.79B | +$144.4M |
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 2019 to Q4 2019: 272 stocks held throughout, up $144.4M (+5.5%).
- Wellcare Health Plans Inc+$47.6M+27%
- Allergan Plc+$29.1M+14%
- Caesars Entmt Corp+$28.9M+17%
- Mellanox Technologies Ltd+$11.2M+7%
- Acacia Communications Inc+$4.6M+4%
- Mplx Lp−$1.1M−9%
- Src Energy Inc−$1.4M−12%
- Plains All Amern Pipeline L−$2.4M−11%
- Smiledirectclub Inc−$3.9M−37%
- Sprint Corporation−$15.7M−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 ↗ |