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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+2.14%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$860M
AUM Growth
+$34.4M
Cap. Flow
-$17.8M
Cap. Flow %
-2.07%
Top 10 Hldgs %
14.96%
Holding
6,670
New
1,973
Increased
1,386
Reduced
1,513
Closed
1,643

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$40.1M
2
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$12.5M
3
BABA icon
Alibaba
BABA
+$10.5M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$9.89M
5
INTC icon
Intel
INTC
+$9.83M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$35.7M
2
GILD icon
Gilead Sciences
GILD
+$32.3M
3
AMZN icon
Amazon
AMZN
+$29M
4
BKNG icon
Booking.com
BKNG
+$28.4M
5
BIDU icon
Baidu
BIDU
+$13.3M

Sector Composition

Rank Sector Weight
1 Communication Services 7.76%
2 Consumer Discretionary 7.62%
3 Healthcare 7.24%
4 Technology 6.95%
5 Financials 4.83%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EPR icon
4451
PUT
EPR Properties
EPR
$4.86B
$1K ﹤0.01%
13
-3
-19% -$184
EQNR icon
4452
PUT
Equinor
EQNR
$95.9B
$1K ﹤0.01%
5
-9
-64% -$160
EXK
4453
Endeavour Silver
EXK
$2.32B
$1K ﹤0.01%
693
+680
+5,231% +$1.59K
FBIO icon
4454
CALL
Fortress Biotech
FBIO
$111M
$1K ﹤0.01%
+4
New +$167
FBIN icon
4455
CALL
Fortune Brands Innovations
FBIN
$6.12B
$1K ﹤0.01%
6
-14
-70% -$545
FCN icon
4456
PUT
FTI Consulting
FCN
$4.82B
$1K ﹤0.01%
4
-67
-94% -$2.53K
FITB
4457
CALL
Fifth Third Bancorp
FITB
$52B
$1K ﹤0.01%
56
+32
+133% +$603
FMC icon
4458
CALL
FMC
FMC
$1.42B
$1K ﹤0.01%
+23
New +$1.2K
FMX icon
4459
PUT
Fomento Económico Mexicano
FMX
$43.3B
$1K ﹤0.01%
5
-5
-50% -$446
FOR icon
4460
Forestar Group
FOR
$1.44B
$1K ﹤0.01%
+68
New +$1K
FSM icon
4461
PUT
Fortuna Silver Mines
FSM
$2.59B
$1K ﹤0.01%
+14
New +$62
FTK icon
4462
CALL
Flotek Industries
FTK
$935M
$1K ﹤0.01%
8
-4
-33% -$391
FTK icon
4463
PUT
Flotek Industries
FTK
$935M
– –
-9
Closed -$880
FUL icon
4464
CALL
H.B. Fuller
FUL
$3B
$1K ﹤0.01%
25
-20
-44% -$856
FUL icon
4465
PUT
H.B. Fuller
FUL
$3B
$1K ﹤0.01%
+9
New +$385
FUN icon
4466
CALL
Cedar Fair
FUN
$1.78B
$1K ﹤0.01%
2
-13
-87% -$703
GAU
4467
Galiano Gold
GAU
$486M
$1K ﹤0.01%
800
+200
+33% +$308
GAU
4468
PUT
Galiano Gold
GAU
$486M
$1K ﹤0.01%
8
+2
+33% +$3
GERN icon
4469
PUT
Geron
GERN
$911M
$1K ﹤0.01%
11
-84
-88% -$285
GEVO icon
4470
Gevo
GEVO
$397M
$1K ﹤0.01%
+1
New +$1.49K
GGAL icon
4471
PUT
Galicia Financial Group
GGAL
$7.92B
$1K ﹤0.01%
134
+26
+24% +$513
GIB icon
4472
CALL
CGI
GIB
$13.9B
$1K ﹤0.01%
+10
New +$409
GLDD
4473
PUT
DELISTED
Great Lakes Dredge & Dock
GLDD
$1K ﹤0.01%
+5
New +$35
GNE icon
4474
PUT
Genie Energy
GNE
$378M
$1K ﹤0.01%
+18
New +$121
GORO icon
4475
Goldgroup Mining Inc.
GORO
$151M
$1K ﹤0.01%
+403
New +$1.35K
177 178
179
180 181

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Simplex Trading's Q1 2015 Portfolio in Review

As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.

By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
  • Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
  • Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
  • Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
  • Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
  • Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
  • Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.

Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.