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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
+5.31%
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
$25.5B
AUM Growth
+$23.2B
Cap. Flow
+$226M
Cap. Flow %
0.89%
Top 10 Hldgs %
29.06%
Holding
8,400
New
2,282
Increased
2,314
Reduced
2,591
Closed
1,035

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.5M
2
MU icon
Micron Technology
MU
+$33.9M
3
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$30.8M
4
NVDA icon
NVIDIA
NVDA
+$23.5M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$22.2M

Top Sells

Rank Stock Value
1
TWX
Time Warner Inc
TWX
+$34.8M
2
AMZN icon
Amazon
AMZN
+$31.2M
3
TSLA icon
Tesla
TSLA
+$17.6M
4
NFLX icon
Netflix
NFLX
+$15.5M
5
AMD icon
Advanced Micro Devices
AMD
+$12.9M

Sector Composition

Rank Sector Weight
1 Technology 1.23%
2 Consumer Discretionary 0.92%
3 Communication Services 0.73%
4 Financials 0.62%
5 Industrials 0.6%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DAKT icon
7026
CALL
Daktronics
DAKT
$941M
$2K ﹤0.01%
+3
New +$27
DES icon
7027
WisdomTree US SmallCap Dividend Fund
DES
$2.19B
$2K ﹤0.01%
+90
New +$2.6K
DOC icon
7028
Healthpeak Properties
DOC
$15.4B
$2K ﹤0.01%
+79
New +$1.86K
ECH icon
7029
iShares MSCI Chile ETF
ECH
$1.01B
$2K ﹤0.01%
47
-308
-87% -$15.9K
EHTH icon
7030
PUT
eHealth
EHTH
$42.5M
$2K ﹤0.01%
+1
New +$19
EQH icon
7031
CALL
Equitable Holdings
EQH
$13.1B
$2K ﹤0.01%
+1
New +$21
FHB icon
7032
PUT
First Hawaiian
FHB
$3.42B
$2K ﹤0.01%
+1
New +$29
FINV
7033
PUT
FinVolution Group
FINV
$1.12B
$2K ﹤0.01%
+5
New +$34
FORM icon
7034
CALL
FormFactor
FORM
$8.11B
$2K ﹤0.01%
+2
New +$27
GLRE icon
7035
PUT
Greenlight Captial
GLRE
$563M
$2K ﹤0.01%
+2
New +$30
IGE icon
7036
iShares North American Natural Resources ETF
IGE
$747M
$2K ﹤0.01%
61
– –
IMNN icon
7037
CALL
Imunon
IMNN
$6.35M
– –
0
– –
KELYB
7038
CALL
Kelly Services Class B
KELYB
$760M
$2K ﹤0.01%
1
-45
-98% -$1.06K
LGMK
7039
PUT
DELISTED
LogicMark
LGMK
– –
0
– –
LNTH icon
7040
CALL
Lantheus
LNTH
$6.82B
$2K ﹤0.01%
+2
New +$31
LSTA icon
7041
PUT
Lisata Therapeutics
LSTA
$15.2M
– –
0
– –
MANU icon
7042
CALL
Manchester United
MANU
$3.91B
$2K ﹤0.01%
1
-75
-99% -$1.51K
MVO
7043
MV Oil Trust
MVO
$6.85M
$2K ﹤0.01%
254
-31,559
-99% -$295K
MWA icon
7044
Mueller Water Products
MWA
$3.92B
$2K ﹤0.01%
232
-2,544
-92% -$28.4K
NEO icon
7045
PUT
NeoGenomics
NEO
$1.81B
$2K ﹤0.01%
+2
New +$22
NGD
7046
CALL
DELISTED
New Gold Inc
NGD
$2K ﹤0.01%
12
-55
-82% -$127
NVAX icon
7047
PUT
Novavax
NVAX
$1.23B
$2K ﹤0.01%
1
– –
OII icon
7048
CALL
Oceaneering
OII
$5.25B
$2K ﹤0.01%
+1
New +$22
PBT
7049
CALL
Permian Basin Royalty Trust
PBT
$1.36B
$2K ﹤0.01%
+3
New +$29
RDNT icon
7050
RadNet
RDNT
$4.84B
$2K ﹤0.01%
196
-2,651
-93% -$36K
280 281
282
283 284

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Simplex Trading's Q2 2018 Portfolio in Review

As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.

By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
  • Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
  • Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
  • Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
  • Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
  • Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
  • Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.

Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.