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MF

Magnetar Financial Portfolio holdings

AUM $11B
1-Year Est. Return 3.37%
This Fund
S&P 500
This Quarter Est. Return
+7.2%
1 Year Est. Return
-3.37%
3 Year Est. Return
+334.16%
5 Year Est. Return
+550.58%
10 Year Est. Return
+5,328.36%
AUM
$9.84B
AUM Growth
-$362M
Cap. Flow
-$294M
Cap. Flow %
-2.99%
Top 10 Hldgs %
55.7%
Holding
1,493
New
604
Increased
145
Reduced
173
Closed
363

Top Buys

Rank Stock Value
1
PEN icon
Penumbra
PEN
+$85.1M
2
WBS
Webster Financial
WBS
+$77.3M
3
AAUC
Allied Gold Corp
AAUC
+$76.1M
4
MASI
Masimo
MASI
+$66.2M
5
MCHPP
Microchip Technology Inc 7.50% Series A Preferred Stock
MCHPP
+$65.3M

Top Sells

Rank Stock Value
1
CMA
Comerica
CMA
+$99.1M
2
REVG
REV Group
REVG
+$97.8M
3
FYBR
Frontier Communications
FYBR
+$89.2M
4
CYBR
CyberArk
CYBR
+$89M
5
TGNA
TEGNA Inc
TGNA
+$84.5M

Sector Composition

Rank Sector Weight
1 Technology 53.03%
2 Financials 19.67%
3 Miscellaneous 8.46%
4 Industrials 4.76%
5 Healthcare 4.19%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BLUW
76
Blue Water Acquisition Corp III
BLUW
$335M
$15.4M 0.16%
1,500,000
– –
PMTR
77
Perimeter Acquisition Corp I
PMTR
$321M
$15.4M 0.16%
1,500,000
– –
NTWO
78
Newbury Street II Acquisition Corp
NTWO
$268M
$15.3M 0.16%
1,450,000
– –
IEAG
79
Infinite Eagle Acquisition Corp
IEAG
$15M 0.15%
+1,500,000
New +$15M
POLE
80
Andretti Acquisition Corp II
POLE
$317M
$14.9M 0.15%
1,400,000
– –
SUMAU
81
SUMA Acquisition Corp Units
SUMAU
$158M
$14.9M 0.15%
+1,485,000
New +$14.9M
CRAC
82
Crown Reserve Acquisition Corp I
CRAC
$228M
$14.8M 0.15%
1,485,000
– –
TERN
83
DELISTED
Terns Pharmaceuticals
TERN
$14.8M 0.15%
+281,614
New +$11.6M
IRHO
84
Iron Horse Acquisitions Corp II
IRHO
$295M
$14.8M 0.15%
+1,500,000
New +$14.8M
KRAQ
85
KRAKacquisition Corp
KRAQ
$14.8M 0.15%
+1,500,000
New +$14.8M
APO.PRA
86
DELISTED
Apollo Global Management Series A
APO.PRA
$14.7M 0.15%
250,000
– –
PTOR
87
Praetorian Acquisition Corp
PTOR
$339M
$14.7M 0.15%
+1,500,000
New +$14.7M
TVA
88
Texas Ventures Acquisition III Corp
TVA
$316M
$14.5M 0.15%
1,400,000
– –
RNGT
89
Range Capital Acquisition Corp II
RNGT
$318M
$14M 0.14%
+1,400,000
New +$14M
ARES.PRB
90
Ares Management Corp 6.75% Series B Preferred Stock
ARES.PRB
$1.36B
$14M 0.14%
382,250
-525,000
-58% -$22.6M
DAWN
91
DELISTED
Day One Biopharmaceuticals
DAWN
$13.8M 0.14%
+645,173
New +$9.09M
IWM icon
92
PUT
iShares Russell 2000 ETF
IWM
$81.9B
$13.8M 0.14%
+57,500
New +$14.8M
XCBE
93
X3 Acquisition Corp
XCBE
$13.8M 0.14%
+1,400,000
New +$13.8M
TDAC
94
Translational Development Acquisition Corp
TDAC
$209M
$13.7M 0.14%
1,300,000
– –
SVCC
95
Stellar V Capital Corp
SVCC
$230M
$13.6M 0.14%
1,300,000
– –
ATII
96
Archimedes Tech SPAC Partners II Co
ATII
$316M
$13.6M 0.14%
1,300,000
– –
OYSE
97
Oyster Enterprises II Acquisition Corp
OYSE
$352M
$13.2M 0.13%
1,300,000
– –
NWE icon
98
NorthWestern Energy
NWE
$4.37B
$13.1M 0.13%
198,460
+803
+0.4% +$54.4K
KFII
99
K&F Growth Acquisition Corp II
KFII
$418M
$13M 0.13%
1,250,000
– –
BBCQ
100
Bleichroeder Acquisition Corp II
BBCQ
$375M
$13M 0.13%
+1,299,993
New +$13M
2 3
4
5 6

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LCAM
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IIM
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RCMNY
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MPI
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RCMF
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SIM
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ACA
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Magnetar Financial's Q1 2026 Portfolio in Review

As of Q1 2026, Magnetar Financial held 1,493 positions worth $9.84B, down 3.5% from $10.2B the previous quarter. Its ten largest holdings account for 56% of the portfolio.

Magnetar Financial's Q1 2026 filing shows 604 new, 145 increased, 173 reduced and 363 closed positions. Its largest new stake was Penumbra: 251,433 shares worth $82.6M. The largest sale was Comerica, an estimated $99.1M.

By sector, the portfolio is most concentrated in Technology at 53% of assets, down from 54% a quarter earlier, followed by Financials and Miscellaneous.

  • Magnetar Financial's largest Q1 2026 buy was Penumbra: 251,433 shares worth $82.6M.
  • Magnetar Financial added most to Webster Financial in Q1 2026, an estimated $77.3M increase.
  • Magnetar Financial's biggest Q1 2026 reduction was Shift4 Payments Inc 6.00% Series A Preferred Stock, cutting an estimated $37.3M.
  • Magnetar Financial fully exited Comerica in Q1 2026, selling an estimated $99.1M.
  • Magnetar Financial's ten largest holdings make up 56% of its $9.84B portfolio in Q1 2026.
  • Magnetar Financial opened 604 new positions and closed 363 in Q1 2026.
  • Magnetar Financial's portfolio value fell 3.5% quarter-over-quarter to $9.84B.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.