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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
-18.41%
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
$34.1B
AUM Growth
+$2.94B
Cap. Flow
-$379M
Cap. Flow %
-1.11%
Top 10 Hldgs %
42.6%
Holding
8,576
New
1,199
Increased
2,701
Reduced
2,877
Closed
1,573

Top Buys

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$58.5M
2
GOOG icon
Alphabet (Google) Class C
GOOG
+$56.5M
3
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$44.1M
4
AAPL icon
Apple
AAPL
+$20.3M
5
XOP icon
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
+$12.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$109M
2
META icon
Meta Platforms (Facebook)
META
+$62.3M
3
QQQ icon
Invesco QQQ Trust
QQQ
+$36.2M
4
GS icon
Goldman Sachs
GS
+$27.1M
5
BA icon
Boeing
BA
+$24.7M

Sector Composition

Rank Sector Weight
1 Communication Services 0.49%
2 Consumer Discretionary 0.48%
3 Technology 0.4%
4 Financials 0.25%
5 Industrials 0.22%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ESS icon
7201
Essex Property Trust
ESS
$18.9B
– –
-1,585
Closed -$400K
ETR icon
7202
Entergy
ETR
$54.1B
– –
-2,548
Closed -$108K
EVC icon
7203
Entravision Communication
EVC
$983M
$0 ﹤0.01%
24
-1,548
-98% -$6.06K
EVH icon
7204
PUT
Evolent Health
EVH
$475M
– –
-107
Closed -$303K
EVRG icon
7205
CALL
Evergy
EVRG
$20.1B
– –
-40
Closed -$219K
EW icon
7206
Edwards Lifesciences
EW
$47.6B
– –
-61,047
Closed -$3.09M
EWBC icon
7207
East-West Bancorp
EWBC
$17.9B
– –
-3,011
Closed -$156K
EWBC icon
7208
PUT
East-West Bancorp
EWBC
$17.9B
– –
-65
Closed -$392K
EWD icon
7209
iShares MSCI Sweden ETF
EWD
$522M
– –
-945
Closed -$31K
EWG icon
7210
iShares MSCI Germany ETF
EWG
$1.5B
– –
-3,054
Closed -$90K
EWJ icon
7211
iShares MSCI Japan ETF
EWJ
$21.7B
– –
-23,158
Closed -$1.39M
EWW icon
7212
iShares MSCI Mexico ETF
EWW
$1.89B
– –
-69,098
Closed -$3.54M
EXAS
7213
DELISTED
Exact Sciences
EXAS
– –
-1,151
Closed -$79K
EXEL icon
7214
Exelixis
EXEL
$13.9B
– –
-7,836
Closed -$140K
EXLS icon
7215
PUT
EXL Service
EXLS
$4.23B
– –
-5
Closed -$6K
EXP icon
7216
Eagle Materials
EXP
$6.6B
– –
-7,408
Closed -$531K
EXPD icon
7217
Expeditors International
EXPD
$22.9B
– –
-6,441
Closed -$452K
EXPO icon
7218
PUT
Exponent
EXPO
$2.98B
– –
-3
Closed -$16K
EXR icon
7219
Extra Space Storage
EXR
$31.2B
– –
-5,756
Closed -$523K
EZPW icon
7220
Ezcorp Inc
EZPW
$1.82B
– –
-3,321
Closed -$31.5K
EZU icon
7221
iShare MSCI Eurozone ETF
EZU
$9.41B
– –
-1,985
Closed -$81K
FANG icon
7222
Diamondback Energy
FANG
$57.6B
– –
-2,994
Closed -$335K
FARO
7223
DELISTED
Faro Technologies
FARO
– –
-625
Closed -$30.3K
FBNC icon
7224
First Bancorp
FBNC
$2.6B
– –
-100
Closed -$4K
FBNC icon
7225
PUT
First Bancorp
FBNC
$2.6B
– –
-1
Closed -$4K
287 288
289
290 291

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Simplex Trading's Q4 2018 Portfolio in Review

As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.

By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.

  • Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
  • Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
  • Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
  • Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
  • Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
  • Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
  • Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.

Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.