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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
+3.04%
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
$2.27B
AUM Growth
-$49.2M
Cap. Flow
-$210M
Cap. Flow %
-9.24%
Top 10 Hldgs %
17.82%
Holding
7,591
New
1,643
Increased
2,060
Reduced
2,267
Closed
1,502

Top Buys

Rank Stock Value
1
TSLA icon
Tesla
TSLA
+$33.5M
2
NFLX icon
Netflix
NFLX
+$22.8M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$20.9M
4
TWX
Time Warner Inc
TWX
+$18.3M
5
BABA icon
Alibaba
BABA
+$15.2M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$71.1M
2
MU icon
Micron Technology
MU
+$43.8M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$26.3M
4
BKNG icon
Booking.com
BKNG
+$22.2M
5
BA icon
Boeing
BA
+$21.6M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 7.87%
2 Communication Services 7.14%
3 Technology 6.23%
4 Financials 5.5%
5 Healthcare 5.2%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
VGZ icon
6926
PUT
Vista Gold
VGZ
$250M
– –
-40
Closed -$7K
VIPS icon
6927
Vipshop
VIPS
$6.91B
– –
-79,526
Closed -$1.31M
VIS icon
6928
Vanguard Industrials ETF
VIS
$8.24B
– –
-121
Closed -$17K
VIV icon
6929
CALL
Telefônica Brasil
VIV
$22B
– –
-265
Closed -$9K
VLRS
6930
Controladora Vuela Compania de Aviacion
VLRS
$883M
– –
-322
Closed -$2K
VO icon
6931
Vanguard Mid-Cap ETF
VO
$106B
– –
-408
Closed -$15K
VOO icon
6932
Vanguard S&P 500 ETF
VOO
$968B
– –
-1,318
Closed -$331K
VOT icon
6933
Vanguard Mid-Cap Growth ETF
VOT
$19.2B
– –
-360
Closed -$45K
VREX icon
6934
CALL
Varex Imaging
VREX
$448M
– –
-39
Closed -$6K
VREX icon
6935
Varex Imaging
VREX
$448M
– –
-9,829
Closed -$375K
VRSK icon
6936
Verisk Analytics
VRSK
$25.3B
– –
-4,307
Closed -$430K
VRSK icon
6937
PUT
Verisk Analytics
VRSK
$25.3B
– –
-190
Closed -$48K
VSH icon
6938
CALL
Vishay Intertechnology
VSH
$6.34B
– –
-80
Closed -$7K
VSTM icon
6939
Verastem
VSTM
$542M
– –
-483
Closed -$18.7K
VTLE
6940
CALL
DELISTED
Vital Energy
VTLE
– –
-3
Closed -$5K
VTRS icon
6941
Viatris
VTRS
$19.8B
– –
-14,899
Closed -$635K
VUZI icon
6942
Vuzix
VUZI
$195M
– –
-17,323
Closed -$141K
VVV icon
6943
CALL
Valvoline
VVV
$4.94B
– –
-10
Closed -$2K
VYX icon
6944
NCR Voyix
VYX
$1.03B
– –
-40,298
Closed -$849K
W icon
6945
Wayfair
W
$10.5B
– –
-5,828
Closed -$490K
WBS icon
6946
PUT
Webster Financial
WBS
$12.2B
– –
-15
Closed -$1K
WCC
6947
CALL
WESCO International
WCC
$16.2B
– –
-49
Closed -$19K
WCC
6948
PUT
WESCO International
WCC
$16.2B
– –
-50
Closed -$1K
WD icon
6949
CALL
Walker & Dunlop
WD
$1.6B
– –
-51
Closed -$6K
WD icon
6950
PUT
Walker & Dunlop
WD
$1.6B
– –
-6
Closed -$1K
276 277
278
279 280

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Simplex Trading's Q1 2018 Portfolio in Review

As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.

Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.

By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.

Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.

  • Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
  • Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
  • Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
  • Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
  • Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
  • Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.

Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.