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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
ACWV icon
6876
iShares MSCI Global Min Vol Factor ETF
ACWV
$3.26B
$3K ﹤0.01%
45
-43
-49% -$3.6K
AEG icon
6877
Aegon
AEG
$13.5B
$3K ﹤0.01%
+641
New +$3.53K
ALDX icon
6878
PUT
Aldeyra Therapeutics
ALDX
$91.7M
$3K ﹤0.01%
+4
New +$32
ALLT icon
6879
Allot
ALLT
$374M
$3K ﹤0.01%
698
+232
+50% +$1.23K
AMSC icon
6880
CALL
American Superconductor
AMSC
$1.48B
$3K ﹤0.01%
5
-49
-91% -$320
ANGI icon
6881
Angi Inc
ANGI
$224M
$3K ﹤0.01%
+20
New +$2.9K
ANIK icon
6882
Anika Therapeutics
ANIK
$199M
$3K ﹤0.01%
100
-3,368
-97% -$139K
ANIK icon
6883
PUT
Anika Therapeutics
ANIK
$199M
$3K ﹤0.01%
1
-39
-98% -$1.61K
APAM icon
6884
CALL
Artisan Partners
APAM
$2.79B
$3K ﹤0.01%
+1
New +$32
BNBX
6885
CALL
DELISTED
BNB PLUS CORP
BNBX
– –
0
– –
ARDX icon
6886
CALL
Ardelyx
ARDX
$1.24B
$3K ﹤0.01%
+9
New +$42
ASC icon
6887
CALL
Ardmore Shipping
ASC
$678M
$3K ﹤0.01%
+4
New +$32
ASX icon
6888
PUT
ASE Group
ASX
$80.8B
$3K ﹤0.01%
+4
New +$22
AVNS icon
6889
CALL
Avanos Medical
AVNS
$1.17B
$3K ﹤0.01%
20
-68
-77% -$3.59K
AVNS icon
6890
PUT
Avanos Medical
AVNS
$1.17B
$3K ﹤0.01%
40
-3
-7% -$159
BLDP
6891
Ballard Power Systems
BLDP
$874M
$3K ﹤0.01%
1,320
-12,376
-90% -$38.9K
CGEN icon
6892
CALL
Compugen
CGEN
$216M
$3K ﹤0.01%
10
-72
-88% -$271
CHT icon
6893
CALL
Chunghwa Telecom
CHT
$33.2B
$3K ﹤0.01%
+1
New +$37
CNK icon
6894
CALL
Cinemark Holdings
CNK
$3.82B
$3K ﹤0.01%
1
-33
-97% -$1.22K
CNK icon
6895
PUT
Cinemark Holdings
CNK
$3.82B
$3K ﹤0.01%
+1
New +$37
CNMD icon
6896
CONMED
CNMD
$1.29B
$3K ﹤0.01%
43
-1,008
-96% -$68.6K
CORN icon
6897
Teucrium Corn Fund
CORN
$190M
$3K ﹤0.01%
200
-10,978
-98% -$195K
CRESY
6898
Cresud
CRESY
$794M
$3K ﹤0.01%
256
-3,733
-94% -$61.4K
CRH icon
6899
CALL
CRH
CRH
$66.7B
$3K ﹤0.01%
1
-68
-99% -$2.45K
CVGI icon
6900
PUT
Commercial Vehicle Group
CVGI
$157M
$3K ﹤0.01%
5
-5
-50% -$39
274 275
276
277 278

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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.