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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+22.5%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$104B
AUM Growth
+$47.9B
Cap. Flow
+$109M
Cap. Flow %
0.11%
Top 10 Hldgs %
39.88%
Holding
11,184
New
2,248
Increased
6,668
Reduced
1,000
Closed
1,196

Top Buys

Rank Stock Value
1
AMC icon
AMC Entertainment Holdings
AMC
+$39.3M
2
T icon
AT&T
T
+$29.8M
3
NVDA icon
NVIDIA
NVDA
+$28.3M
4
MU icon
Micron Technology
MU
+$22.9M
5
BIDU icon
Baidu
BIDU
+$22.3M

Top Sells

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$36.1M
2
TSLA icon
Tesla
TSLA
+$35.2M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.9M
4
PLTR icon
Palantir
PLTR
+$25.7M
5
WFC icon
Wells Fargo
WFC
+$20.4M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.7%
2 Technology 0.48%
3 Consumer Discretionary 0.39%
4 Communication Services 0.28%
5 Healthcare 0.27%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CEVA icon
10076
CEVA Inc
CEVA
$759M
– –
-110
Closed -$5.42K
CF icon
10077
CF Industries
CF
$20.2B
– –
-51,724
Closed -$2.63M
CFA icon
10078
VictoryShares US 500 Volatility Wtd ETF
CFA
$539M
– –
-15,803
Closed -$1.06M
CFFN icon
10079
Capitol Federal Financial
CFFN
$1.09B
– –
-79
Closed -$1.01K
CG icon
10080
Carlyle Group
CG
$16.7B
– –
-5,260
Closed -$224K
CGBD icon
10081
Carlyle Secured Lending
CGBD
$804M
– –
-234
Closed -$3.18K
CGNX icon
10082
Cognex
CGNX
$10.5B
– –
-5,958
Closed -$482K
CHH icon
10083
Choice Hotels
CHH
$4.53B
– –
-966
Closed -$112K
CIA icon
10084
CALL
Citizens
CIA
$200M
– –
-4
Closed -$2K
CIG icon
10085
CEMIG Preferred Shares
CIG
$6.12B
– –
-132,298
Closed -$183K
CIVB icon
10086
CALL
Civista Bancshares
CIVB
$577M
– –
-2
Closed -$4K
CLBK icon
10087
CALL
Columbia Financial
CLBK
$1.22B
– –
-14
Closed -$24K
CLBK icon
10088
Columbia Financial
CLBK
$1.22B
$0 ﹤0.01%
+4
New +$70
CLFD icon
10089
Clearfield
CLFD
$389M
– –
-3,177
Closed -$113K
CLH icon
10090
Clean Harbors
CLH
$16.7B
– –
-474
Closed -$43.1K
CMCO icon
10091
Columbus McKinnon
CMCO
$544M
– –
-381
Closed -$19.5K
CMCO icon
10092
PUT
Columbus McKinnon
CMCO
$544M
– –
-19
Closed -$100K
CMP icon
10093
Compass Minerals
CMP
$1.06B
– –
-871
Closed -$57.8K
CMPR icon
10094
Cimpress
CMPR
$2.13B
– –
-5
Closed -$505
CNDT icon
10095
Conduent
CNDT
$302M
– –
-49,443
Closed -$361K
CNET icon
10096
ZW Data Action Technologies
CNET
$4.66M
– –
-366
Closed -$14.1K
CNO icon
10097
PUT
CNO Financial Group
CNO
$5.25B
– –
-1
Closed -$2K
CNX icon
10098
CNX Resources
CNX
$5.55B
– –
-12,283
Closed -$172K
CNXN icon
10099
CALL
PC Connection
CNXN
$2.13B
– –
-13
Closed -$60K
COF icon
10100
Capital One
COF
$135B
– –
-26,693
Closed -$4.03M
402 403
404
405 406

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Simplex Trading's Q2 2021 Portfolio in Review

As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.

Simplex Trading's Q2 2021 filing shows 2,248 new, 6,668 increased, 1,000 reduced and 1,196 closed positions. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M. The largest sale was Invesco QQQ Trust, an estimated $36.1M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
  • Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
  • Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
  • Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
  • Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
  • Simplex Trading opened 2,248 new positions and closed 1,196 in Q2 2021.
  • Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.

Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.