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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
+5.31%
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
$25.5B
AUM Growth
+$23.2B
Cap. Flow
+$226M
Cap. Flow %
0.89%
Top 10 Hldgs %
29.06%
Holding
8,400
New
2,282
Increased
2,314
Reduced
2,591
Closed
1,035

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.5M
2
MU icon
Micron Technology
MU
+$33.9M
3
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$30.8M
4
NVDA icon
NVIDIA
NVDA
+$23.5M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$22.2M

Top Sells

Rank Stock Value
1
TWX
Time Warner Inc
TWX
+$34.8M
2
AMZN icon
Amazon
AMZN
+$31.2M
3
TSLA icon
Tesla
TSLA
+$17.6M
4
NFLX icon
Netflix
NFLX
+$15.5M
5
AMD icon
Advanced Micro Devices
AMD
+$12.9M

Sector Composition

Rank Sector Weight
1 Technology 1.23%
2 Consumer Discretionary 0.92%
3 Communication Services 0.73%
4 Financials 0.62%
5 Industrials 0.6%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FCN icon
7501
FTI Consulting
FCN
$4.75B
– –
-1,109
Closed -$64.3K
FCPT icon
7502
Four Corners Property Trust
FCPT
$2.84B
– –
-345
Closed -$7.9K
FDUS icon
7503
Fidus Investment
FDUS
$737M
– –
-2,307
Closed -$31.6K
FDUS icon
7504
PUT
Fidus Investment
FDUS
$737M
– –
-25
Closed -$6K
FENG
7505
CALL
Phoenix New Media
FENG
$17.3M
– –
-5
Closed -$1K
FEZ icon
7506
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.25B
– –
-60,435
Closed -$2.43M
FF icon
7507
Future Fuel
FF
$207M
– –
-322
Closed -$4.15K
FLNT
7508
Fluent
FLNT
$102M
$0 ﹤0.01%
58
-1,942
-97% -$31.7K
FLWS icon
7509
1-800-Flowers.com
FLWS
$249M
– –
-1,703
Closed -$21.5K
FMC icon
7510
FMC
FMC
$1.46B
– –
-182
Closed -$13.5K
FNF icon
7511
Fidelity National Financial
FNF
$13.1B
– –
-933
Closed -$34K
FOXF icon
7512
Fox Factory Holding Corp
FOXF
$765M
– –
-1,122
Closed -$43.3K
FRPT icon
7513
PUT
Freshpet
FRPT
$2.78B
– –
-102
Closed -$13K
FRT icon
7514
Federal Realty Investment Trust
FRT
$10.8B
– –
-864
Closed -$102K
FTAI icon
7515
FTAI Aviation
FTAI
$22.2B
– –
-11,231
Closed -$163K
FTNT icon
7516
Fortinet
FTNT
$111B
– –
-23,340
Closed -$276K
FULT icon
7517
Fulton Financial
FULT
$4.64B
– –
-592
Closed -$10.3K
FWRD icon
7518
CALL
Forward Air
FWRD
$490M
– –
-29
Closed -$5K
FXC icon
7519
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
– –
-3,296
Closed -$252K
FXF icon
7520
Invesco CurrencyShares Swiss Franc Trust
FXF
$410M
– –
-2,636
Closed -$251K
FXI icon
7521
iShares China Large-Cap ETF
FXI
$4.29B
– –
-20,407
Closed -$964K
FXP icon
7522
ProShares UltraShort FTSE China 50 of ProShares Trust
FXP
$6.39M
– –
-73
Closed -$8K
G icon
7523
Genpact
G
$5.15B
– –
-462
Closed -$14.3K
GALT icon
7524
Galectin Therapeutics
GALT
$227M
– –
-1,315
Closed -$6.41K
GASS icon
7525
CALL
StealthGas
GASS
$335M
– –
-123
Closed -$2K
299 300
301
302 303

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Simplex Trading's Q2 2018 Portfolio in Review

As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.

By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
  • Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
  • Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
  • Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
  • Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
  • Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
  • Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.

Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.