Magnetar Financial LLC
"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.
13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.
We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 32 quarters, returned +2.4% per quarter — versus +2.7% per quarter from simply owning every 13F stock. It beat that baseline in only 43.8% of quarters (excess t = -0.97, not statistically significant). Its filings tell you what it bought — not what you should buy.
Quarterly compounding, invested quarters only · entry 47 days after quarter-end (when 13F data becomes public)
Top 20 holdings of 1129 · 2026 Q1
| Ticker | Value | Weight | QoQ |
|---|---|---|---|
| CRWV | $4.7B | | HOLD |
| AIRT | $87M | | TRIM |
| GTLS | $87M | | TRIM |
| TXNM | $86M | | TRIM |
| PEN | $83M | | NEW |
| WBD | $82M | | TRIM |
| PRA | $80M | | TRIM |
| KVUE | $79M | | TRIM |
| WBS | $79M | | ADD |
| AAUC | $78M | | NEW |
| NSC | $78M | | TRIM |
| TECK | $78M | | TRIM |
| MASI | $76M | | ADD |
| JD | $75M | | ADD |
| TCOM | $72M | | ADD |
| DBRG | $65M | | ADD |
| CSGS | $65M | | HOLD |
| PCG | $61M | | ADD |
| HPE | $60M | | ADD |
| MCHP | $59M | | NEW |
QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.
New positions in 2026 Q1
Method & Limitations
Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry 47 days after quarter-end — the first day the public could act on the filing. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.