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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
+12.69%
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
$73.5B
AUM Growth
+$10.8B
Cap. Flow
-$387M
Cap. Flow %
-0.53%
Top 10 Hldgs %
42.78%
Holding
9,056
New
1,402
Increased
3,135
Reduced
3,121
Closed
1,191

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$102M
2
TSM icon
TSMC
TSM
+$27.8M
3
JPM icon
JPMorgan Chase
JPM
+$22.4M
4
BA icon
Boeing
BA
+$19.4M
5
XOM icon
ExxonMobil
XOM
+$14.7M

Top Sells

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$95.5M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$79.6M
3
TSLA icon
Tesla
TSLA
+$75.3M
4
NVDA icon
NVIDIA
NVDA
+$51.6M
5
EFA icon
iShares MSCI EAFE ETF
EFA
+$40.5M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.95%
2 Consumer Discretionary 0.55%
3 Technology 0.41%
4 Healthcare 0.23%
5 Financials 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
WRAP icon
8626
Wrap Technologies
WRAP
$103M
– –
-12,780
Closed -$122K
WRB icon
8627
W.R. Berkley
WRB
$25.7B
– –
-1,553
Closed -$42.6K
WSC icon
8628
WillScot Mobile Mini Holdings
WSC
$3.62B
– –
-39,978
Closed -$639K
WSC icon
8629
PUT
WillScot Mobile Mini Holdings
WSC
$3.62B
– –
-167
Closed -$205K
WSO icon
8630
Watsco Inc
WSO
$13B
– –
-3,106
Closed -$700K
WST icon
8631
West Pharmaceutical
WST
$23.9B
$0 ﹤0.01%
+1,216
New +$322K
WTFC icon
8632
Wintrust Financial
WTFC
$10.4B
– –
-1,609
Closed -$68.8K
WTFC icon
8633
PUT
Wintrust Financial
WTFC
$10.4B
– –
-133
Closed -$580K
WTS icon
8634
CALL
Watts Water Technologies
WTS
$12.1B
– –
-10
Closed -$81K
WTS icon
8635
Watts Water Technologies
WTS
$12.1B
– –
-13
Closed -$1K
WTS icon
8636
PUT
Watts Water Technologies
WTS
$12.1B
– –
-1
Closed -$8K
WTTR icon
8637
Select Water Solutions
WTTR
$2.59B
– –
-1,547
Closed -$7.29K
WTTR icon
8638
PUT
Select Water Solutions
WTTR
$2.59B
– –
-13
Closed -$6K
WTW icon
8639
CALL
Willis Towers Watson
WTW
$31.1B
– –
-26
Closed -$512K
WW
8640
DELISTED
WW International
WW
– –
-10,785
Closed -$254K
WWD icon
8641
Woodward
WWD
$20.4B
– –
-790
Closed -$63.5K
XBIT icon
8642
XBiotech
XBIT
$67.1M
– –
-3,305
Closed -$57K
XENE icon
8643
CALL
Xenon Pharmaceuticals
XENE
$5.79B
– –
-3
Closed -$3K
XENE icon
8644
Xenon Pharmaceuticals
XENE
$5.79B
– –
-126
Closed -$1K
XES icon
8645
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$406M
– –
-130
Closed -$4K
XHR
8646
PUT
Xenia Hotels & Resorts
XHR
$1.66B
– –
-25
Closed -$23K
XLRE icon
8647
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.26B
– –
-8,747
Closed -$304K
XMLV icon
8648
Invesco S&P MidCap Low Volatility ETF
XMLV
$742M
– –
-37
Closed -$1K
XP icon
8649
XP
XP
$10.1B
$0 ﹤0.01%
20,727
+11,510
+125% +$526K
XPRO icon
8650
CALL
Expro Ltd
XPRO
$2.02B
– –
-5
Closed -$6K
344 345
346
347 348

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Simplex Trading's Q3 2020 Portfolio in Review

As of Q3 2020, Simplex Trading held 9,056 positions worth $73.5B, up 17% from $62.7B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q3 2020 filing shows 1,402 new, 3,135 increased, 3,121 reduced and 1,191 closed positions. Its largest new stake was Goldman Sachs: 60,397 shares worth $12.1M. The largest sale was SPDR Gold Trust, an estimated $95.5M.

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

  • Simplex Trading's largest Q3 2020 buy was Goldman Sachs: 60,397 shares worth $12.1M.
  • Simplex Trading added most to Amazon in Q3 2020, an estimated $102M increase.
  • Simplex Trading's biggest Q3 2020 reduction was SPDR Gold Trust, cutting an estimated $95.5M.
  • Simplex Trading fully exited iShares MSCI EAFE ETF in Q3 2020, selling an estimated $40.5M.
  • Simplex Trading's ten largest holdings make up 43% of its $73.5B portfolio in Q3 2020.
  • Simplex Trading opened 1,402 new positions and closed 1,191 in Q3 2020.
  • Simplex Trading's portfolio value rose 17% quarter-over-quarter to $73.5B.

Based on Simplex Trading's 13F filing for Q3 2020, filed 14 Oct 2020.