13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q1 2018. See the latest, Q2 2026 →
Reported value
$5.80B
+3.2% on the quarter before
Positions
556
254 new · 372 sold out
Top 10
46.2%
of the value
Est. gain
−$101.9M
on stocks held all quarter
Est. return
−3.1%
on those stocks since Q4 2017
Positions as of Mar 31, 2018, 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 Q4 2017. Striped tiles are options.
Largest buys
Since Q4 2017, 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.
- Express Scripts Hldg Co~$246.6MNew · 0.0% → 4.3%+3,569,260 shares
- Csra Inc~$235.1MNew · 0.0% → 4.1%+5,701,257 shares
- Microsemi Corp~$220.8MNew · 0.0% → 3.8%+3,411,550 shares
- Validus Holdings Ltd~$191.9MNew · 0.0% → 3.3%+2,845,731 shares
- Mulesoft Inc~$177.4MNew · 0.0% → 3.1%+4,032,537 shares
- Kapstone Paper & Packaging C~$139.3MNew · 0.0% → 2.4%+4,060,200 shares
- Scana Corp New~$136.5MNew · 0.0% → 2.4%+3,634,037 shares
- Transcanada Corp~$93.0MAdded · 0.0% → 1.6%+2,251,759 shares
- Rsp Permian Inc~$90.5MNew · 0.0% → 1.6%+1,929,758 shares
- Enbridge Inc~$82.1MNew · 0.0% → 1.4%+2,607,501 shares
Largest sells
Since Q4 2017, 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.
- Scripps Networks Interact In~$193.1MSold out · 3.4% → 0.0%−2,261,180 shares
- Calatlantic Group Inc~$154.6MSold out · 2.8% → 0.0%−2,742,363 shares
- Regal Entmt Group~$124.8MSold out · 2.2% → 0.0%−5,422,422 shares
- Alps ETF Tr~$124.5MSold out · 2.2% → 0.0%−11,534,300 shares
- Kinder Morgan~$82.7MSold out · 1.5% → 0.0%−4,577,200 shares
- Broadsoft Inc~$81.1MSold out · 1.4% → 0.0%−1,477,506 shares
- Time Warner Inc~$76.6MCut · 7.8% → 6.5%−810,384 shares
- Ignyta Inc~$74.6MSold out · 1.3% → 0.0%−2,795,526 shares
- Straight Path Communicatns I~$61.9MSold out · 1.1% → 0.0%−340,483 shares
- Spectra Energy Partners Lp~$60.1MCut · 1.6% → 0.3%−1,785,640 shares
Holdings
As of Mar 31, 2018. Changes are in shares against Dec 31, 2017, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Time Warner IncCOM NEW · shares −17% · price +3.4% | 6.5% | $374.8M | +$12.3M | ||||||||
| Nxp Semiconductors N VCOM · shares +6.4% · price −0.1% | 5.7% | $328.2M | −$238,302 | ||||||||
| Rockwell Collins IncCOM · shares +16% · price −0.6% | 5.5% | $317.3M | −$1.6M | ||||||||
| Monsanto Co NewCOM · shares +4.1% · price −0.1% | 4.7% | $275.2M | −$202,975 | ||||||||
| Aetna Inc NewCOM · shares +9.2% · price −6.3% | 4.7% | $275.1M | −$17.0M | ||||||||
| Express Scripts Hldg CoCOM · shares New | 4.3% | $246.6M | — | ||||||||
| Csra IncCOM · shares New | 4.1% | $235.1M | — | ||||||||
| Microsemi CorpCOM · shares New | 3.8% | $220.8M | — | ||||||||
| Cavium IncCOM · shares +2.7% · price −5.3% | 3.7% | $212.6M | −$11.6M | ||||||||
| Validus Holdings LtdCOM SHS · shares New | 3.3% | $191.9M | — | ||||||||
| Wgl Hldgs IncCOM · shares +13% · price −2.6% | 3.2% | $184.2M | −$4.3M | ||||||||
| Mulesoft IncCL A · shares New | 3.1% | $177.4M | — | ||||||||
| Orbital Atk IncCOM · shares +8.0% · price +0.8% | 3.0% | $172.3M | +$1.3M | ||||||||
| Avista CorpCOM · shares −1.3% · price −0.5% | 2.6% | $152.9M | −$716,212 | ||||||||
| Tribune Media CoCL A · shares +0.2% · price −4.6% | 2.5% | $144.9M | −$7.0M | ||||||||
| Kapstone Paper & Packaging CCOM · shares New | 2.4% | $139.3M | — | ||||||||
| Scana Corp NewCOM · shares New | 2.4% | $136.5M | — | ||||||||
| Transcanada CorpCOM · shares +21,293% · price −15.2% | 1.6% | $93.5M | −$78,147 | ||||||||
| Rsp Permian IncCOM · shares New | 1.6% | $90.5M | — | ||||||||
| Enbridge IncCOM · shares New | 1.4% | $82.1M | — | ||||||||
| Nxstage Medical IncCOM · shares −0.7% · price +2.6% | 1.3% | $76.0M | +$1.9M | ||||||||
| Dynegy Inc New DelCOM · shares +5.7% · price +14.1% | 1.3% | $75.5M | +$8.8M | ||||||||
| Oclaro IncCOM NEW · shares New | 1.3% | $74.6M | — | ||||||||
| Parsley Energy IncCL A · shares +14% · price −1.5% | 1.3% | $74.5M | −$1.0M | ||||||||
| Western Gas Partners LpCOM UNIT LP IN · shares −6.5% · price −11.3% | 1.2% | $71.2M | −$9.0M | ||||||||
| Total · 556 positions | 100% | $5.80B | −$101.9M |
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 2017 to Q1 2018: 290 stocks held throughout, down $101.9M (−3.1%).
- Time Warner Inc+$12.3M+3%
- Dynegy Inc New Del+$8.8M+14%
- Capella Education Company+$3.0M+13%
- Mainsource Financial Gp Inc+$2.0M+12%
- Nxstage Medical Inc+$1.9M+3%
- Western Gas Partners Lp−$9.0M−11%
- C&J Energy Svcs Inc New−$9.7M−23%
- Cavium Inc−$11.6M−5%
- Aetna Inc New−$17.0M−6%
- Akorn Inc−$27.6M−42%
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 ↗ |