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
+5.31%
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
$25.5B
AUM Growth
+$23.2B
Cap. Flow
+$226M
Cap. Flow %
0.89%
Top 10 Hldgs %
29.06%
Holding
8,400
New
2,282
Increased
2,314
Reduced
2,591
Closed
1,035

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.5M
2
MU icon
Micron Technology
MU
+$33.9M
3
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$30.8M
4
NVDA icon
NVIDIA
NVDA
+$23.5M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$22.2M

Top Sells

Rank Stock Value
1
TWX
Time Warner Inc
TWX
+$34.8M
2
AMZN icon
Amazon
AMZN
+$31.2M
3
TSLA icon
Tesla
TSLA
+$17.6M
4
NFLX icon
Netflix
NFLX
+$15.5M
5
AMD icon
Advanced Micro Devices
AMD
+$12.9M

Sector Composition

Rank Sector Weight
1 Technology 1.23%
2 Consumer Discretionary 0.92%
3 Communication Services 0.73%
4 Financials 0.62%
5 Industrials 0.6%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AKR icon
7301
PUT
Acadia Realty Trust
AKR
$2.94B
– –
-78
Closed -$9K
ALB icon
7302
Albemarle
ALB
$13.8B
– –
-36,518
Closed -$3.51M
ALSN icon
7303
Allison Transmission
ALSN
$9.92B
– –
-8,567
Closed -$353K
ALT icon
7304
Altimmune
ALT
$552M
– –
-14
Closed -$276
ALTO icon
7305
Alto Ingredients
ALTO
$385M
$0 ﹤0.01%
+155
New +$493
ALTO icon
7306
PUT
Alto Ingredients
ALTO
$385M
– –
-36
Closed -$4K
ALV icon
7307
CALL
Autoliv
ALV
$8.44B
– –
-19
Closed -$2K
AMD icon
7308
Advanced Micro Devices
AMD
$880B
– –
-1,014,115
Closed -$12.9M
AME icon
7309
Ametek
AME
$55.3B
– –
-5,962
Closed -$442K
AMGN icon
7310
Amgen
AMGN
$201B
– –
-24,637
Closed -$4.36M
AMH icon
7311
American Homes 4 Rent
AMH
$11.9B
– –
-57
Closed -$1.17K
AMPH icon
7312
CALL
Amphastar Pharmaceuticals
AMPH
$832M
– –
-50
Closed -$44K
AMX icon
7313
America Movil
AMX
$77.9B
– –
-3,693
Closed -$63.9K
ANAB icon
7314
CALL
AnaptysBio
ANAB
$1.63B
– –
-15
Closed -$27K
ANF icon
7315
Abercrombie & Fitch
ANF
$4.04B
– –
-12,117
Closed -$317K
ANSS
7316
DELISTED
Ansys
ANSS
– –
-709
Closed -$118K
YDKG
7317
PUT
Yueda Digital Holding
YDKG
$5.16M
– –
0
– -$4K
APA icon
7318
APA Corp
APA
$12.9B
– –
-32,763
Closed -$1.36M
APAM icon
7319
PUT
Artisan Partners
APAM
$2.73B
– –
-3
Closed -$1K
APEI icon
7320
American Public Education
APEI
$884M
– –
-1,217
Closed -$50.9K
APLE icon
7321
Apple Hospitality REIT
APLE
$3.92B
– –
-2,364
Closed -$43.2K
APO icon
7322
Apollo Global Management
APO
$68.6B
– –
-13,142
Closed -$402K
APPS icon
7323
Digital Turbine
APPS
$971M
– –
-1,081
Closed -$1.85K
APT icon
7324
Alpha Pro Tech
APT
$50.2M
$0 ﹤0.01%
+262
New +$886
ARCO icon
7325
Arcos Dorados Holdings
ARCO
$1.74B
– –
-1,204
Closed -$9.49K
291 292
293
294 295

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 Q2 2018 Portfolio in Review

As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.

By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
  • Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
  • Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
  • Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
  • Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
  • Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
  • Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.

Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.