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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
+17.83%
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
$36B
AUM Growth
+$1.89B
Cap. Flow
-$586M
Cap. Flow %
-1.63%
Top 10 Hldgs %
34.84%
Holding
8,479
New
1,472
Increased
3,049
Reduced
2,419
Closed
1,324

Top Buys

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$86.9M
2
DIS icon
Walt Disney
DIS
+$25.5M
3
BIDU icon
Baidu
BIDU
+$12.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$12.3M
5
RHT
Red Hat Inc
RHT
+$11.4M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$60.3M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$33.9M
4
AAPL icon
Apple
AAPL
+$21.1M
5
XLF icon
State Street Financial Select Sector SPDR ETF
XLF
+$18.2M

Sector Composition

Rank Sector Weight
1 Communication Services 0.58%
2 Technology 0.42%
3 Healthcare 0.34%
4 Consumer Discretionary 0.29%
5 Industrials 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EFAV icon
7276
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.22B
– –
-826
Closed -$55K
EGY icon
7277
Vaalco Energy
EGY
$594M
– –
-297
Closed -$624
ELAN icon
7278
CALL
Elanco Animal Health
ELAN
$12.4B
– –
-6
Closed -$18K
ELAN icon
7279
PUT
Elanco Animal Health
ELAN
$12.4B
– –
-8
Closed -$25K
ELME
7280
CALL
Elme Communities
ELME
$132M
– –
-16
Closed -$36K
ELP
7281
CALL
DELISTED
Companhia Paranaense de Energia (COPEL)
ELP
– –
-35
Closed -$10K
ENB icon
7282
Enbridge
ENB
$124B
– –
-12,024
Closed -$433K
ENS icon
7283
CALL
EnerSys
ENS
$6.95B
– –
-14
Closed -$108K
ENS icon
7284
EnerSys
ENS
$6.95B
– –
-165
Closed -$12.5K
ENTA icon
7285
Enanta Pharmaceuticals
ENTA
$372M
– –
-316
Closed -$28.3K
ENTG icon
7286
Entegris
ENTG
$19.7B
– –
-5,343
Closed -$178K
EPAM icon
7287
EPAM Systems
EPAM
$4.69B
– –
-741
Closed -$111K
EPI icon
7288
WisdomTree India Earnings Fund ETF
EPI
$2.02B
– –
-11,867
Closed -$294K
EPM icon
7289
PUT
Evolution Petroleum
EPM
$137M
– –
-11
Closed -$7K
EQR icon
7290
Equity Residential
EQR
$25.4B
– –
-2,115
Closed -$152K
ERIC icon
7291
Ericsson
ERIC
$30.7B
– –
-13,076
Closed -$118K
ERY icon
7292
Direxion Daily Energy Bear 2X ETF
ERY
$37.5M
– –
-295
Closed -$191K
EUFN icon
7293
iShares MSCI Europe Financials ETF
EUFN
$3.87B
– –
-86,123
Closed -$1.46M
EUO icon
7294
ProShares UltraShort Euro
EUO
$35.6M
– –
-3,290
Closed -$79K
EVC icon
7295
Entravision Communication
EVC
$983M
$0 ﹤0.01%
116
+92
+383% +$341
EVR icon
7296
Evercore
EVR
$13.1B
– –
-1,001
Closed -$87.9K
EVRI
7297
DELISTED
Everi Holdings
EVRI
– –
-5,957
Closed -$45.3K
EVTC icon
7298
Evertec
EVTC
$1.83B
– –
-4,778
Closed -$135K
EWC icon
7299
iShares MSCI Canada ETF
EWC
$6.04B
– –
-15,409
Closed -$369K
EWI icon
7300
iShares MSCI Italy ETF
EWI
$911M
– –
-28,023
Closed -$678K
290 291
292
293 294

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Simplex Trading's Q1 2019 Portfolio in Review

As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.

By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
  • Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
  • Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
  • Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
  • Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
  • Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
  • Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.

Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.