13F filer · CIK 1352851 ↗
Magnetar Financial LLC
You are looking at Q4 2018. See the latest, Q2 2026 →
Reported value
$4.08B
−26% on the quarter before
Positions
273
143 new · 360 sold out
Top 10
46.3%
of the value
Est. gain
−$109.9M
on stocks held all quarter
Est. return
−5.4%
on those stocks since Q3 2018
Positions as of Dec 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 Q3 2018. Striped tiles are options.
Largest buys
Since Q3 2018, 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.
- Arris Intl Inc~$231.3MNew · 0.0% → 5.7%+7,565,641 shares
- Tribune Media Co~$217.3MNew · 0.0% → 5.3%+4,789,389 shares
- Red Hat Inc~$216.7MNew · 0.0% → 5.3%+1,233,872 shares
- Esterline Technologies Corp~$147.1MNew · 0.0% → 3.6%+1,211,582 shares
- Newfield Expl Co~$138.4MAdded · 0.0% → 3.4%+9,437,835 shares
- Finisar Corp~$125.8MNew · 0.0% → 3.1%+5,823,496 shares
- Tesaro Inc~$102.5MNew · 0.0% → 2.5%+1,379,798 shares
- Belmond Ltd~$88.9MNew · 0.0% → 2.2%+3,552,239 shares
- Sendgrid Inc~$86.8MAdded · 0.0% → 2.1%+2,010,392 shares
- Nutri Sys Inc New~$82.2MNew · 0.0% → 2.0%+1,873,846 shares
Largest sells
Since Q3 2018, 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.
- Aetna Inc New~$332.6MSold out · 6.0% → 0.0%−1,639,411 shares
- Rockwell Collins Inc~$330.1MSold out · 6.0% → 0.0%−2,350,263 shares
- Express Scripts Hldg Co~$314.7MSold out · 5.7% → 0.0%−3,312,213 shares
- Energen Corp~$258.0MSold out · 4.7% → 0.0%−2,993,513 shares
- Ca Inc~$242.3MSold out · 4.4% → 0.0%−5,488,741 shares
- Pinnacle Foods Inc Del~$233.2MSold out · 4.2% → 0.0%−3,598,263 shares
- Gramercy Ppty Tr~$223.9MSold out · 4.0% → 0.0%−8,161,237 shares
- Kapstone Paper & Packaging C~$150.9MSold out · 2.7% → 0.0%−4,449,719 shares
- Supervalu Inc~$80.2MSold out · 1.4% → 0.0%−2,489,194 shares
- Oclaro Inc~$75.9MSold out · 1.4% → 0.0%−8,486,649 shares
Holdings
As of Dec 31, 2018. Changes are in shares against Sep 30, 2018, so a price move alone never reads as a buy or a sale.
| Holding | Value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Arris Intl IncSHS · shares New | 5.7% | $231.3M | — | ||||||||
| Tribune Media CoCL A · shares New | 5.3% | $217.3M | — | ||||||||
| Red Hat IncCOM · shares New | 5.3% | $216.7M | — | ||||||||
| Integrated Device TechnologyCOM · shares −16% · price +3.0% | 5.1% | $205.9M | +$6.0M | ||||||||
| Shire PlcSPONSORED ADR · shares −5.3% · price −4.0% | 4.9% | $198.9M | −$8.3M | ||||||||
| Vectren CorpCOM · shares −2.9% · price +0.7% | 4.6% | $186.8M | +$1.3M | ||||||||
| Scana Corp NewCOM · shares −2.9% · price +22.9% | 4.3% | $175.4M | +$32.6M | ||||||||
| U S G CorpCOM NEW · shares −3.5% · price −1.5% | 3.8% | $154.7M | −$2.4M | ||||||||
| Sprint CorpCOM SER 1 · shares −3.6% · price −11.0% | 3.8% | $153.0M | −$18.9M | ||||||||
| Esterline Technologies CorpCOM · shares New | 3.6% | $147.1M | — | ||||||||
| Newfield Expl CoCOM · shares +104,159% · price −49.1% | 3.4% | $138.5M | −$128,166 | ||||||||
| Avista CorpCOM · shares −4.0% · price −16.0% | 3.2% | $129.1M | −$24.6M | ||||||||
| Finisar CorpCOM NEW · shares New | 3.1% | $125.8M | — | ||||||||
| Tesaro IncCOM · shares New | 2.5% | $102.5M | — | ||||||||
| Belmond LtdCL A · shares New | 2.2% | $88.9M | — | ||||||||
| Sendgrid IncCOM · shares +33,334% · price +17.3% | 2.1% | $87.0M | +$38,358 | ||||||||
| Nxstage Medical IncCOM · shares −6.1% · price +2.6% | 2.1% | $84.9M | +$2.2M | ||||||||
| Nutri Sys Inc NewCOM · shares New | 2.0% | $82.2M | — | ||||||||
| Pacific Biosciences Calif InCOM · shares New | 1.7% | $68.7M | — | ||||||||
| Electro Scientific IndsCOM · shares New | 1.6% | $66.5M | — | ||||||||
| Energy Transfer LpCOM UT LTD PTN · shares +635% · price −24.2% | 1.6% | $64.9M | −$2.8M | ||||||||
| Nevsun Res LtdCOM · shares +7.8% · price −1.1% | 1.5% | $59.1M | −$595,542 | ||||||||
| Mb Financial Inc NewCOM · shares −3.5% · price −14.1% | 1.4% | $56.9M | −$9.3M | ||||||||
| Churchill Cap CorpCOM CL A ADDED · shares New | 1.3% | $52.5M | — | ||||||||
| Williams CompaniesCOM · shares −9.8% · price −18.9% | 1.3% | $52.0M | −$12.1M | ||||||||
| Total · 273 positions | 100% | $4.08B | −$109.9M |
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 Q3 2018 to Q4 2018: 120 stocks held throughout, down $109.9M (−5.4%).
- Scana Corp New+$32.6M+23%
- Parsley Energy Inc83:1 split+$18.4M+4,836%
- Integrated Device Technology+$6.0M+3%
- Nxstage Medical Inc+$2.2M+3%
- Vectren Corp+$1.3M+1%
- Williams Companies−$12.1M−19%
- Marathon Pete Corp−$14.5M−27%
- Exterran Corp−$15.2M−29%
- Sprint Corp−$18.9M−11%
- Avista Corp−$24.6M−16%
Estimated as in the holdings table: shares held at both quarter ends times the change in price; options left out, 1 split 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 ↗ |