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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
LSPD icon
1276
Lightspeed Commerce
LSPD
$1.4B
– –
-56,199
Closed -$678K
LYG icon
1277
Lloyds Banking Group
LYG
$85.7B
– –
-23,645
Closed -$125K
LZ icon
1278
LegalZoom.com
LZ
$1.04B
– –
-47,838
Closed -$475K
MBLY icon
1279
Mobileye
MBLY
$7.32B
– –
-17,051
Closed -$178K
MDLZ icon
1280
Mondelez International
MDLZ
$79.7B
– –
-38,090
Closed -$2.05M
MDXG icon
1281
MiMedx Group
MDXG
$657M
– –
-45,322
Closed -$307K
MFA
1282
MFA Financial
MFA
$896M
– –
-22,100
Closed -$206K
MGNI icon
1283
Magnite
MGNI
$3.35B
– –
-96,163
Closed -$1.56M
MLM icon
1284
Martin Marietta Materials
MLM
$37.5B
– –
-3,784
Closed -$2.36M
MRSH
1285
Marsh
MRSH
$90.7B
– –
-24,579
Closed -$4.56M
MNDY icon
1286
monday.com
MNDY
$4.21B
– –
-2,415
Closed -$356K
MNKD icon
1287
MannKind Corp
MNKD
$1.31B
– –
-37,398
Closed -$212K
MOFG
1288
DELISTED
MidWestOne Financial Group
MOFG
– –
-563,016
Closed -$21.7M
MOS icon
1289
The Mosaic Company
MOS
$7.55B
– –
-53,590
Closed -$1.29M
MQ icon
1290
Marqeta
MQ
$1.69B
– –
-4,485
Closed -$85.2K
MRVL icon
1291
Marvell Technology
MRVL
$217B
– –
-4,396
Closed -$374K
MTG icon
1292
MGIC Investment
MTG
$6.38B
– –
-35,320
Closed -$1.03M
MTN icon
1293
Vail Resorts
MTN
$5.15B
– –
-3,527
Closed -$468K
MU icon
1294
Micron Technology
MU
$1.06T
– –
-10,555
Closed -$3.01M
NABL icon
1295
N-able
NABL
$746M
– –
-71,006
Closed -$531K
NBIX icon
1296
Neurocrine Biosciences
NBIX
$15.8B
– –
-29,192
Closed -$4.14M
NEXT icon
1297
NextDecade
NEXT
$1.98B
– –
-37,283
Closed -$196K
NFG icon
1298
National Fuel Gas
NFG
$7.88B
– –
-37,476
Closed -$3M
NGD
1299
DELISTED
New Gold Inc
NGD
– –
-5,064,109
Closed -$44.1M
NJR icon
1300
New Jersey Resources
NJR
$5.46B
– –
-9,199
Closed -$424K
50 51
52
53 54

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BEI
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LCAM
London & Capital Asset Management London, United Kingdom $10.9B AUM 39.88% 1-Year Est. Return
IIM
INTECH Investment Management West Palm Beach, Florida $10.9B AUM 37.22% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
MPI
Mairs & Power Inc St Paul, Minnesota $10.9B AUM 27.5% 1-Year Est. Return
RCMF
RK Capital Management (Florida) Weston, Florida $10.8B AUM 53.02% 1-Year Est. Return
SIM
SRS Investment Management New York $10.8B AUM 34.05% 1-Year Est. Return
ACA
Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return

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.