We are live on ! Find out more
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
+17.83%
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
$36B
AUM Growth
+$1.89B
Cap. Flow
-$586M
Cap. Flow %
-1.63%
Top 10 Hldgs %
34.84%
Holding
8,479
New
1,472
Increased
3,049
Reduced
2,419
Closed
1,324

Top Buys

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$86.9M
2
DIS icon
Walt Disney
DIS
+$25.5M
3
BIDU icon
Baidu
BIDU
+$12.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$12.3M
5
RHT
Red Hat Inc
RHT
+$11.4M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$60.3M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$33.9M
4
AAPL icon
Apple
AAPL
+$21.1M
5
XLF icon
State Street Financial Select Sector SPDR ETF
XLF
+$18.2M

Sector Composition

Rank Sector Weight
1 Communication Services 0.58%
2 Technology 0.42%
3 Healthcare 0.34%
4 Consumer Discretionary 0.29%
5 Industrials 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
WCC
7951
WESCO International
WCC
$16.2B
– –
-84
Closed -$4.44K
WEN icon
7952
Wendy's
WEN
$1.37B
– –
-784
Closed -$13.3K
WES icon
7953
CALL
Western Midstream Partners
WES
$19.7B
– –
-76
Closed -$210K
WES icon
7954
Western Midstream Partners
WES
$19.7B
– –
-1,522
Closed -$48.3K
WES icon
7955
PUT
Western Midstream Partners
WES
$19.7B
– –
-9
Closed -$24K
WEX icon
7956
WEX
WEX
$5.68B
– –
-22
Closed -$3.72K
WH icon
7957
Wyndham Hotels & Resorts
WH
$5.5B
– –
-9,462
Closed -$478K
WING icon
7958
Wingstop
WING
$3.68B
– –
-3,526
Closed -$240K
WIX icon
7959
WIX.com
WIX
$2B
– –
-398
Closed -$43.2K
WIT icon
7960
PUT
Wipro
WIT
$17.6B
– –
-120
Closed -$23K
WK icon
7961
PUT
Workiva
WK
$2.86B
– –
-11
Closed -$39K
WKC icon
7962
World Kinect Corp
WKC
$1.87B
– –
-2,018
Closed -$53K
WLK icon
7963
Westlake Corp
WLK
$9.84B
– –
-12,562
Closed -$910K
WMK icon
7964
CALL
Weis Markets
WMK
$1.86B
– –
-13
Closed -$62K
WMS icon
7965
Advanced Drainage Systems
WMS
$10.7B
– –
-621
Closed -$15K
WPM icon
7966
Wheaton Precious Metals
WPM
$49.9B
– –
-6,608
Closed -$141K
WPP icon
7967
WPP
WPP
$3.87B
– –
-2,209
Closed -$123K
WPRT
7968
Westport Fuel Systems
WPRT
$36.3M
$0 ﹤0.01%
10
-349
-97% -$5.11K
WPRT
7969
PUT
Westport Fuel Systems
WPRT
$36.3M
– –
-2
Closed -$2K
WRB icon
7970
CALL
W.R. Berkley
WRB
$27.1B
– –
-47
Closed -$103K
WRLD icon
7971
CALL
World Acceptance Corp
WRLD
$849M
– –
-4
Closed -$40K
WRLD icon
7972
World Acceptance Corp
WRLD
$849M
– –
-25
Closed -$2K
WSO icon
7973
Watsco Inc
WSO
$14.9B
– –
-3,056
Closed -$438K
WST icon
7974
CALL
West Pharmaceutical
WST
$25.2B
– –
-4
Closed -$39K
WTRG icon
7975
Essential Utilities
WTRG
$11.3B
– –
-239
Closed -$8.43K
317 318
319
320 321

Similar funds

Mitsubishi UFJ Asset Management
Mitsubishi UFJ Asset Management Tokyo, Japan $149B AUM 24.71% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $147B AUM 18.73% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Simplex Trading's Q1 2019 Portfolio in Review

As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.

By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
  • Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
  • Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
  • Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
  • Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
  • Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
  • Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.

Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.