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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
CTRE icon
5576
CareTrust REIT
CTRE
$10.2B
$1K ﹤0.01%
+90
New +$1.33K
CUBE icon
5577
PUT
CubeSmart
CUBE
$9.53B
$1K ﹤0.01%
+109
New +$2.97K
CVBF icon
5578
CALL
CVB Financial
CVBF
$3.98B
$1K ﹤0.01%
+19
New +$447
CVE icon
5579
CALL
Cenovus Energy
CVE
$54.6B
$1K ﹤0.01%
+175
New +$1.54K
CVLT icon
5580
CALL
Commault Systems
CVLT
$5.89B
$1K ﹤0.01%
+3
New +$162
CWEN icon
5581
PUT
Clearway Energy Class C
CWEN
$5B
$1K ﹤0.01%
+45
New +$789
CX icon
5582
PUT
Cemex
CX
$17.4B
$1K ﹤0.01%
35
-189
-84% -$1.42K
DLX icon
5583
PUT
Deluxe
DLX
$1.19B
$1K ﹤0.01%
+11
New +$814
DRD
5584
DRDGold
DRD
$1.82B
$1K ﹤0.01%
+730
New +$2.19K
DRD
5585
PUT
DRDGold
DRD
$1.82B
$1K ﹤0.01%
+7
New +$21
DRRX
5586
CALL
DELISTED
DURECT Corp
DRRX
$1K ﹤0.01%
+5
New +$70
DRRX
5587
DELISTED
DURECT Corp
DRRX
$1K ﹤0.01%
+64
New +$894
DWSN icon
5588
Dawson Geophysical
DWSN
$155M
$1K ﹤0.01%
+173
New +$1.01K
EC icon
5589
PUT
Ecopetrol
EC
$32.9B
$1K ﹤0.01%
10
+5
+100% +$89
ECVT icon
5590
PUT
Ecovyst
ECVT
$1.36B
$1K ﹤0.01%
+5
New +$75
EEX
5591
DELISTED
Emerald Holding
EEX
$1K ﹤0.01%
+94
New +$1.95K
EGBN icon
5592
PUT
Eagle Bancorp
EGBN
$867M
$1K ﹤0.01%
2
-86
-98% -$5.33K
EHC icon
5593
CALL
Encompass Health
EHC
$11.2B
$1K ﹤0.01%
3
-11
-79% -$472
ENPH icon
5594
PUT
Enphase Energy
ENPH
$4.84B
$1K ﹤0.01%
119
+80
+205% +$243
EQR icon
5595
PUT
Equity Residential
EQR
$25.4B
$1K ﹤0.01%
+57
New +$3.38K
ERIC icon
5596
CALL
Ericsson
ERIC
$30.7B
$1K ﹤0.01%
67
-4
-6% -$27
ERIC icon
5597
PUT
Ericsson
ERIC
$30.7B
$1K ﹤0.01%
18
-200
-92% -$1.35K
EVC icon
5598
PUT
Entravision Communication
EVC
$983M
$1K ﹤0.01%
+13
New +$84
EWBC icon
5599
PUT
East-West Bancorp
EWBC
$17.9B
$1K ﹤0.01%
+5
New +$328
EXK
5600
CALL
Endeavour Silver
EXK
$2.32B
$1K ﹤0.01%
+53
New +$126
222 223
224
225 226

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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.