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Magnetar Financial portfolio

Type not verified

Portfolio as of Jun 30, 2026 (Q2 2026) · filed with the SEC on Aug 14, 2026 · data updated on Nov 5, 2026 · Q2 2026 13F (filing) ↗ · all its 13F filings ↗

A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.

Magnetar Financial reported a $10.5 bn portfolio of 949 companies (1,120 positions, counting each share class separately) to the SEC as of the end of Q2 2026. Its largest positions are CRWV, Hewlett Packard Enterprise C, WBS. During the quarter it opened Dominion Energy and Bio-techne.

Stock portfolio
$10.5 bn
Companies
949
1,120 positions (by CUSIP)Top 10: 57%
Turnover
20%
Copying its 13F, 5 years
—
Not calculated: not counted as a concentrated manager

Sections with a free account

What it reported after the quarter end (Q2 2026)

The 13F shows the portfolio as of Jun 30, 2026. Since then Magnetar Financial has filed these own trades with the SEC (Form 4, when it owns more than 10% of a company or holds a role in it) and stakes above 5% (13D and 13G). It is not everything it did: only what it must report before the next 13F.

Plus 36 more, in its EDGAR filings.

What changed this quarter

1108 positions with a change (347 new, 136 added to, 196 trimmed, 429 sold); also, 27 entered through an IPO, 28 exited through an acquisition or merger, 70 entered through a spin-off. 6 are listed here: those of 0.5 points of the portfolio or more (up to 12).

The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.

Top holdings

Portfolio by sector

  • ● Information Technology 53%
  • ● SPAC / vehículos 20%
  • ● No sector 7%
  • ● Industrials 5%
  • ● Health Care 3%
  • ● Financials 3%
  • ● Utilities 2%
  • ● Communication Services 2%
  • ● Materials 2%
  • ● Consumer Discretionary 1%
  • ● Consumer Staples 1%
  • ● Real Estate 1%

Declared options (1)

Besides stocks, Magnetar Financial declared 1 put (they gain if the stock falls) with a notional of $17.3M. The 13F reports the value of the underlying shares, not the premium paid, so these figures look large and are not added to the portfolio. Nor does it say whether the option is bought or written, or its strike or expiry: it may be a hedge.

Stakes above 5% (13D/13G)

Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.

How we classify it

Type not verified: we have not assigned a type because we found no document that is enough to tell. Most 13F filers are in this situation: we only review in depth those that meet the portfolio criteria.

Not counted as a concentrated manager: its portfolio is not within 5 to 100 positions. Its portfolio is shown all the same, but it is left out of manager counts, the consensus and the ranking. How this is decided

Managers of a similar size

A 13F portfolio value between a third and three times this one, whatever the type of filer. It is not a comparison of what they hold.

Follow Magnetar Financial for free

When the next 13F is filed, we email you (if you turn it on) and it shows in your list. No credit card.

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