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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
SOHU
5776
CALL
Sohu.com
SOHU
$336M
$1K ﹤0.01%
+75
New +$2.86K
SPWH icon
5777
PUT
Sportsman's Warehouse
SPWH
$43.7M
$1K ﹤0.01%
+17
New +$84
SSB icon
5778
PUT
SouthState Bank Corp
SSB
$10.3B
$1K ﹤0.01%
+10
New +$886
SSNC icon
5779
CALL
SS&C Technologies
SSNC
$17.8B
$1K ﹤0.01%
13
-14
-52% -$694
SSP icon
5780
CALL
E.W. Scripps
SSP
$274M
$1K ﹤0.01%
21
-335
-94% -$4.88K
STRA icon
5781
CALL
Strategic Education
STRA
$1.71B
$1K ﹤0.01%
+70
New +$6.63K
STRL icon
5782
Sterling Infrastructure
STRL
$20.3B
$1K ﹤0.01%
125
-1,988
-94% -$26.3K
SVC
5783
PUT
Service Properties Trust
SVC
$1.1B
$1K ﹤0.01%
+2
New +$269
SVRA icon
5784
PUT
Savara
SVRA
$1.13B
$1K ﹤0.01%
+5
New +$59
TAOP icon
5785
CALL
Taoping
TAOP
$7.84M
– –
0
– –
TDW icon
5786
Tidewater
TDW
$3.91B
$1K ﹤0.01%
+52
New +$1.39K
TGB
5787
Trekor Metals
TGB
$2.56B
$1K ﹤0.01%
+1,643
New +$2.65K
THS
5788
CALL
DELISTED
Treehouse Foods
THS
$1K ﹤0.01%
37
+25
+208% +$1.09K
TRIB
5789
Trinity Biotech
TRIB
$5.7M
$1K ﹤0.01%
2
+1
+100% +$818
TRMB icon
5790
CALL
Trimble
TRMB
$12.3B
$1K ﹤0.01%
33
-2
-6% -$81
TRMB icon
5791
PUT
Trimble
TRMB
$12.3B
$1K ﹤0.01%
9
-32
-78% -$1.29K
TRTX
5792
TPG RE Finance Trust
TRTX
$666M
$1K ﹤0.01%
+88
New +$1.68K
TTC icon
5793
CALL
Toro Company
TTC
$8.93B
$1K ﹤0.01%
7
-7
-50% -$446
TTSH
5794
CALL
DELISTED
Tile Shop Holdings
TTSH
$1K ﹤0.01%
22
-42
-66% -$325
TVTX icon
5795
CALL
Travere Therapeutics
TVTX
$5.33B
$1K ﹤0.01%
38
-17
-31% -$405
TX icon
5796
PUT
Ternium
TX
$9.29B
$1K ﹤0.01%
17
-7
-29% -$237
UAN icon
5797
PUT
CVR Partners
UAN
$1.3B
$1K ﹤0.01%
3
-12
-80% -$421
UFCS icon
5798
United Fire Group
UFCS
$1.32B
$1K ﹤0.01%
+28
New +$1.26K
UGI icon
5799
PUT
UGI
UGI
$8B
$1K ﹤0.01%
+16
New +$717
UGA icon
5800
CALL
United States Gasoline Fund
UGA
$142M
$1K ﹤0.01%
75
-5
-6% -$159
230 231
232
233 234

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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.