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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
ANGI icon
7126
PUT
Angi Inc
ANGI
$224M
– –
0
– –
CDXS icon
7127
PUT
Codexis
CDXS
$135M
$1K ﹤0.01%
+1
New +$13
CIG icon
7128
CALL
CEMIG Preferred Shares
CIG
$6.09B
$1K ﹤0.01%
16
-692
-98% -$749
CODI icon
7129
PUT
Compass Diversified
CODI
$755M
$1K ﹤0.01%
+1
New +$16
CRBP icon
7130
PUT
Corbus Pharmaceuticals
CRBP
$170M
– –
0
– –
CRMD icon
7131
PUT
CorMedix
CRMD
$617M
$1K ﹤0.01%
10
-14
-58% -$16
CTLP
7132
PUT
DELISTED
Cantaloupe
CTLP
$1K ﹤0.01%
+1
New +$11
CVCO icon
7133
PUT
Cavco Industries
CVCO
$4.39B
$1K ﹤0.01%
1
– –
CWEN icon
7134
CALL
Clearway Energy Class C
CWEN
$5B
$1K ﹤0.01%
+1
New +$18
DBC icon
7135
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
$1K ﹤0.01%
+1
New +$18
DHX icon
7136
CALL
DHI Group
DHX
$166M
$1K ﹤0.01%
+6
New +$12
EAF icon
7137
PUT
GrafTech
EAF
$194M
– –
0
– –
EFC
7138
CALL
Ellington Financial
EFC
$1.68B
$1K ﹤0.01%
+1
New +$15
EINC icon
7139
CALL
VanEck Energy Income ETF
EINC
$102M
$1K ﹤0.01%
+2
New +$132
EINC icon
7140
PUT
VanEck Energy Income ETF
EINC
$102M
$1K ﹤0.01%
2
+1
+100% +$66
ENTG icon
7141
Entegris
ENTG
$19.7B
$1K ﹤0.01%
37
+12
+48% +$425
DMC
7142
Del Monte Corp
DMC
$1.35B
$1K ﹤0.01%
31
-3,081
-99% -$144K
FORM icon
7143
FormFactor
FORM
$8.11B
$1K ﹤0.01%
91
-9,877
-99% -$134K
FWRD icon
7144
Forward Air
FWRD
$482M
$1K ﹤0.01%
+17
New +$973
GIGM icon
7145
GigaMedia
GIGM
$15.3M
$1K ﹤0.01%
+448
New +$1.28K
GNSS icon
7146
Genasys
GNSS
$75.6M
$1K ﹤0.01%
426
+217
+104% +$499
HDSN
7147
CALL
Hudson Technologies
HDSN
$267M
$1K ﹤0.01%
+5
New +$16
HL icon
7148
PUT
Hecla Mining
HL
$10.2B
$1K ﹤0.01%
3
-109
-97% -$415
IBP icon
7149
Installed Building Products
IBP
$6.13B
$1K ﹤0.01%
22
-468
-96% -$27.7K
ICMB icon
7150
PUT
Investcorp Credit Management BDC
ICMB
$11.3M
$1K ﹤0.01%
+2
New +$17
284 285
286
287 288

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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.