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
+8.29%
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
$114B
AUM Growth
+$21.9B
Cap. Flow
+$10.1B
Cap. Flow %
8.87%
Top 10 Hldgs %
37.97%
Holding
10,803
New
1,536
Increased
3,665
Reduced
3,633
Closed
1,729

Top Buys

Rank Stock Value
1
WMT icon
Walmart Inc
WMT
+$43.6M
2
AAPL icon
Apple
AAPL
+$40.9M
3
OIH icon
VanEck Oil Services ETF
OIH
+$37.7M
4
C icon
Citigroup
C
+$34.2M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$32.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$189M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
3
NVDA icon
NVIDIA
NVDA
+$115M
4
TSLA icon
Tesla
TSLA
+$52M
5
META icon
Meta Platforms (Facebook)
META
+$49M

Sector Composition

Rank Sector Weight
1 Technology 0.42%
2 Consumer Discretionary 0.2%
3 Healthcare 0.17%
4 Industrials 0.15%
5 Communication Services 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CRH icon
9151
CRH
CRH
$66.7B
– –
-1,546
Closed -$73.2K
CRIS icon
9152
Curis
CRIS
$9.53M
– –
-61
Closed -$16.1K
CRL icon
9153
Charles River Laboratories
CRL
$10.9B
– –
-1,035
Closed -$235K
CRNT icon
9154
Ceragon Networks
CRNT
$194M
– –
-5,023
Closed -$9.56K
CRON
9155
Cronos Group
CRON
$1.05B
– –
-255,834
Closed -$574K
CRSR icon
9156
Corsair Gaming
CRSR
$1.05B
– –
-50
Closed -$813
CRVS icon
9157
CALL
Corvus Pharmaceuticals
CRVS
$1.1B
– –
-11,000
Closed -$9K
CRVS icon
9158
Corvus Pharmaceuticals
CRVS
$1.1B
– –
-21,419
Closed -$16.7K
CSR
9159
CALL
Centerspace
CSR
$936M
– –
-100
Closed -$5K
CSTL icon
9160
PUT
Castle Biosciences
CSTL
$749M
– –
-400
Closed -$9K
CSW
9161
CSW Industrials
CSW
$4.71B
– –
-99
Closed -$11K
CSW
9162
PUT
CSW Industrials
CSW
$4.71B
– –
-300
Closed -$34K
CTKB icon
9163
PUT
Cytek Biosciences
CTKB
$576M
– –
-200
Closed -$2K
CTRE icon
9164
CareTrust REIT
CTRE
$10.2B
– –
-2,020
Closed -$39.5K
CTRA
9165
DELISTED
Coterra Energy
CTRA
– –
-122,027
Closed -$3M
CTSH icon
9166
Cognizant
CTSH
$21.5B
– –
-9,566
Closed -$599K
CULP icon
9167
CALL
Culp Inc
CULP
$45M
– –
-500
Closed -$2K
CURE icon
9168
Direxion Daily Healthcare Bull 3X ETF
CURE
$178M
– –
-276
Closed -$31K
CURV icon
9169
Torrid Holdings
CURV
$247M
– –
-3,349
Closed -$10.6K
CUT icon
9170
Invesco MSCI Global Timber ETF
CUT
$31.9M
– –
-652
Closed -$19K
CUZ icon
9171
CALL
Cousins Properties
CUZ
$5.29B
– –
-200
Closed -$5K
CVGI icon
9172
CALL
Commercial Vehicle Group
CVGI
$157M
– –
-8,200
Closed -$55K
CVM icon
9173
CEL-SCI Corp
CVM
$20.6M
$0 ﹤0.01%
14
-455
-97% -$35.6K
CVNA icon
9174
Carvana
CVNA
$43.3B
– –
-1,177,515
Closed -$2.04M
CW icon
9175
CALL
Curtiss-Wright
CW
$27.7B
– –
-100
Closed -$16K
365 366
367
368 369

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 2023 Portfolio in Review

As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.

By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.

On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.

  • Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
  • Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
  • Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
  • Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
  • Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
  • Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.

Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.