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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
INDP icon
8101
Indaptus Therapeutics
INDP
$369M
– –
-1
Closed -$735
INFY icon
8102
Infosys
INFY
$43.2B
– –
-10,110
Closed -$126K
INMD icon
8103
InMode
INMD
$867M
– –
-13,632
Closed -$224K
INSW icon
8104
International Seaways
INSW
$4.52B
– –
-7,856
Closed -$131K
INVE icon
8105
Identive
INVE
$66.7M
– –
-378
Closed -$2.02K
IONS icon
8106
Ionis Pharmaceuticals
IONS
$9.23B
– –
-10,697
Closed -$594K
IPAR icon
8107
Interparfums
IPAR
$3.84B
$0 ﹤0.01%
+100
New +$4.3K
IPAY icon
8108
Amplify Mobile Payments ETF
IPAY
$153M
– –
-575
Closed -$28K
IQV icon
8109
IQVIA
IQV
$34.6B
– –
-1,745
Closed -$273K
IRBT
8110
DELISTED
iRobot
IRBT
– –
-16,599
Closed -$1.28M
ITGR icon
8111
Integer Holdings
ITGR
$3.31B
– –
-1,536
Closed -$103K
ITRI icon
8112
Itron
ITRI
$3.72B
– –
-274
Closed -$17.4K
IWF icon
8113
iShares Russell 1000 Growth ETF
IWF
$123B
– –
-58,980
Closed -$2.83M
IWO icon
8114
iShares Russell 2000 Growth ETF
IWO
$14.6B
– –
-8,978
Closed -$1.86M
IWV icon
8115
iShares Russell 3000 ETF
IWV
$19.5B
– –
-384
Closed -$69K
IYR icon
8116
iShares US Real Estate ETF
IYR
$4.49B
– –
-119,316
Closed -$9.4M
JILL icon
8117
J. Jill
JILL
$247M
$0 ﹤0.01%
+303
New +$877
KALA icon
8118
KALA BIO
KALA
$11.3M
– –
-7
Closed -$161K
KFRC icon
8119
PUT
Kforce
KFRC
$1.01B
– –
-1
Closed -$2K
KLXE icon
8120
CALL
KLX Energy Services
KLXE
$49.3M
– –
-26
Closed -$27K
KMB icon
8121
Kimberly-Clark
KMB
$35.6B
– –
-860
Closed -$129K
KN icon
8122
Knowles
KN
$3.32B
– –
-588
Closed -$8.91K
KNSL icon
8123
Kinsale Capital Group
KNSL
$7.66B
– –
-402
Closed -$73.9K
KODK icon
8124
Kodak
KODK
$788M
– –
-2,087
Closed -$16.3K
KRE icon
8125
State Street SPDR S&P Regional Banking ETF
KRE
$4.82B
– –
-65,000
Closed -$2.5M
323 324
325
326 327

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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.