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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
+12.69%
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
$73.5B
AUM Growth
+$10.8B
Cap. Flow
-$1.16B
Cap. Flow %
-1.58%
Top 10 Hldgs %
42.78%
Holding
9,056
New
1,403
Increased
3,135
Reduced
3,122
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 Consumer Discretionary 0.53%
2 Technology 0.4%
3 Healthcare 0.22%
4 Financials 0.21%
5 Communication Services 0.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
VRTX icon
8601
Vertex Pharmaceuticals
VRTX
$120B
$0 ﹤0.01%
5,566
+4,179
+301% +$1.15M
VSAT icon
8602
Viasat
VSAT
$10.2B
– –
-4,211
Closed -$159K
VTV icon
8603
Vanguard Value ETF
VTV
$187B
– –
-1,933
Closed -$192K
VTWO icon
8604
Vanguard Russell 2000 ETF
VTWO
$17.5B
– –
-126
Closed -$7K
VVX icon
8605
V2X
VVX
$2.54B
– –
-132
Closed -$6K
VXRT
8606
DELISTED
Vaxart
VXRT
$0 ﹤0.01%
+5,717
New +$50.9K
VXZ icon
8607
iPath Series B S&P 500 VIX Mid-Term Futures ETN
VXZ
$31M
– –
-3,713
Closed -$500K
VYGR icon
8608
PUT
Voyager Therapeutics
VYGR
$187M
– –
-10
Closed -$12K
VYX icon
8609
NCR Voyix
VYX
$1.07B
– –
-52,559
Closed -$624K
WATT icon
8610
Energous
WATT
$84.8M
– –
-7
Closed -$13.7K
WB icon
8611
Weibo
WB
$1.93B
– –
-27,583
Closed -$974K
WGO icon
8612
Winnebago Industries
WGO
$880M
– –
-26,592
Closed -$1.53M
WH icon
8613
Wyndham Hotels & Resorts
WH
$5.67B
– –
-15,627
Closed -$763K
WHD icon
8614
CALL
Cactus
WHD
$3.89B
– –
-10
Closed -$20K
WHR icon
8615
Whirlpool
WHR
$2.41B
– –
-2,600
Closed -$432K
WIT icon
8616
PUT
Wipro
WIT
$17.9B
– –
-60
Closed -$9K
WK icon
8617
CALL
Workiva
WK
$2.92B
– –
-4
Closed -$21K
WLKP icon
8618
PUT
Westlake Chemical Partners
WLKP
$777M
– –
-34
Closed -$64K
WMK icon
8619
CALL
Weis Markets
WMK
$1.93B
– –
-10
Closed -$50K
WMS icon
8620
PUT
Advanced Drainage Systems
WMS
$10.9B
– –
-3
Closed -$14K
WNC icon
8621
Wabash National
WNC
$566M
– –
-15,416
Closed -$181K
WNS
8622
CALL
DELISTED
WNS Holdings
WNS
– –
-2
Closed -$10K
WNS
8623
PUT
DELISTED
WNS Holdings
WNS
– –
-1
Closed -$5K
WOR icon
8624
Worthington Enterprises
WOR
$2.71B
– –
-5,951
Closed -$145K
WPC icon
8625
W.P. Carey
WPC
$16.8B
– –
-16,687
Closed -$1.12M
343 344
345
346 347

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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 1,403 new, 3,135 increased, 3,122 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 Consumer Discretionary at 0.53% of assets, up from 0.47% a quarter earlier, followed by Technology and Healthcare.

  • 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 1,403 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.