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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
NERV icon
7176
Minerva Neurosciences
NERV
$188M
$1K ﹤0.01%
+27
New +$1.64K
NSSC icon
7177
CALL
Napco Security Technologies
NSSC
$1.28B
$1K ﹤0.01%
2
-18
-90% -$106
NTRA icon
7178
PUT
Natera
NTRA
$37.5B
$1K ﹤0.01%
+1
New +$12
NVMI
7179
Nova
NVMI
$13.9B
$1K ﹤0.01%
+53
New +$1.5K
NWBI icon
7180
Northwest Bancshares
NWBI
$2.25B
$1K ﹤0.01%
+73
New +$1.25K
ONB icon
7181
Old National Bancorp
ONB
$10.1B
$1K ﹤0.01%
76
-102
-57% -$1.82K
PLUG icon
7182
CALL
Plug Power
PLUG
$2.92B
$1K ﹤0.01%
+7
New +$14
PLUR icon
7183
PUT
Pluri
PLUR
$19.2M
– –
0
– –
PLX icon
7184
CALL
Protalix BioTherapeutics
PLX
$191M
$1K ﹤0.01%
+3
New +$13
PRDO icon
7185
CALL
Perdoceo Education
PRDO
$1.9B
$1K ﹤0.01%
+1
New +$15
PSO icon
7186
CALL
Pearson
PSO
$9.78B
$1K ﹤0.01%
1
-20
-95% -$231
RES icon
7187
PUT
RPC Inc
RES
$1.24B
$1K ﹤0.01%
1
-2
-67% -$34
SBS icon
7188
CALL
Sabesp
SBS
$19.7B
$1K ﹤0.01%
10
-207
-95% -$326
SBSW icon
7189
CALL
Sibanye-Stillwater
SBSW
$5.92B
$1K ﹤0.01%
+5
New +$15
SCYX icon
7190
SCYNEXIS
SCYX
$37M
$1K ﹤0.01%
+12
New +$1.43K
SCYX icon
7191
PUT
SCYNEXIS
SCYX
$37M
– –
0
– –
SNDX icon
7192
PUT
Syndax Pharmaceuticals
SNDX
$1.84B
$1K ﹤0.01%
+2
New +$20
SVRA icon
7193
PUT
Savara
SVRA
$1.13B
$1K ﹤0.01%
1
-4
-80% -$40
SXC icon
7194
PUT
SunCoke Energy
SXC
$757M
$1K ﹤0.01%
+1
New +$12
TAOP icon
7195
CALL
Taoping
TAOP
$7.84M
– –
0
– –
TGNA
7196
CALL
DELISTED
TEGNA Inc
TGNA
$1K ﹤0.01%
+1
New +$11
TIMB icon
7197
TIM SA
TIMB
$10.2B
$1K ﹤0.01%
71
-657
-90% -$12.9K
TLPH icon
7198
PUT
Talphera
TLPH
$70.1M
– –
-3
Closed -$178
TPH
7199
CALL
DELISTED
Tri Pointe Homes
TPH
$1K ﹤0.01%
+1
New +$17
TRAK icon
7200
PUT
ReposiTrak
TRAK
$148M
$1K ﹤0.01%
+2
New +$17
286 287
288
289 290

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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.