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
QMCO icon
6926
CALL
Quantum Corp
QMCO
$437M
$1K ﹤0.01%
1
-4
-80% -$135
RAIL icon
6927
FreightCar America
RAIL
$275M
$1K ﹤0.01%
202
-77
-28% -$569
RFL icon
6928
CALL
Rafael Holdings
RFL
$111M
$1K ﹤0.01%
+1
New +$14
RLI icon
6929
RLI Corp
RLI
$5.68B
$1K ﹤0.01%
36
– –
RMBS icon
6930
PUT
Rambus
RMBS
$10.4B
$1K ﹤0.01%
1
-19
-95% -$182
RYAM icon
6931
PUT
Rayonier Advanced Materials
RYAM
$565M
$1K ﹤0.01%
1
-16
-94% -$217
SCL icon
6932
CALL
Stepan Co
SCL
$1.31B
$1K ﹤0.01%
+6
New +$520
SLP icon
6933
Simulations Plus
SLP
$371M
$1K ﹤0.01%
+69
New +$1.38K
SPRO icon
6934
CALL
Spero Therapeutics
SPRO
$68.9M
$1K ﹤0.01%
+1
New +$11
TACT icon
6935
CALL
Transact Technologies
TACT
$51.7M
$1K ﹤0.01%
2
– –
TCPC icon
6936
BlackRock TCP Capital
TCPC
$265M
$1K ﹤0.01%
137
-45
-25% -$642
TFSL icon
6937
TFS Financial
TFSL
$5.1B
$1K ﹤0.01%
94
+10
+12% +$167
TOUR
6938
CALL
Tuniu
TOUR
$55.4M
– –
0
– –
TPIC
6939
DELISTED
TPI Composites
TPIC
$1K ﹤0.01%
62
-3,360
-98% -$99.5K
UFI icon
6940
CALL
UNIFI
UFI
$117M
$1K ﹤0.01%
+1
New +$22
VANI icon
6941
PUT
Vivani Medical
VANI
$110M
$1K ﹤0.01%
1
– –
VATE icon
6942
INNOVATE Corp
VATE
$114M
$1K ﹤0.01%
78
-230
-75% -$7.17K
VYGR icon
6943
PUT
Voyager Therapeutics
VYGR
$187M
$1K ﹤0.01%
+1
New +$13
WNC icon
6944
CALL
Wabash National
WNC
$543M
$1K ﹤0.01%
1
-21
-95% -$297
WNC icon
6945
Wabash National
WNC
$543M
$1K ﹤0.01%
+97
New +$1.37K
XNCR icon
6946
Xencor
XNCR
$1.44B
$1K ﹤0.01%
46
-227
-83% -$7.55K
XPRO icon
6947
Expro Ltd
XPRO
$1.79B
$1K ﹤0.01%
+33
New +$1.2K
ZYME icon
6948
PUT
Zymeworks
ZYME
$1.68B
$1K ﹤0.01%
1
– –
TEN
6949
Tsakos Energy Navigation Ltd
TEN
$1.19B
$1K ﹤0.01%
115
+103
+858% +$1.65K
TEN
6950
PUT
Tsakos Energy Navigation Ltd
TEN
$1.19B
$1K ﹤0.01%
1
– –
276 277
278
279 280

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.