We are live on ! Find out more
Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+14.57%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$45.7B
AUM Growth
+$10.6B
Cap. Flow
+$377M
Cap. Flow %
0.82%
Top 10 Hldgs %
38.52%
Holding
8,523
New
1,277
Increased
3,072
Reduced
2,710
Closed
1,251

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$70.1M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$46.6M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$37.4M
4
AMZN icon
Amazon
AMZN
+$37M
5
TSLA icon
Tesla
TSLA
+$28M

Top Sells

Rank Stock Value
1
BABA icon
Alibaba
BABA
+$41M
2
BA icon
Boeing
BA
+$27.8M
3
BIIB icon
Biogen
BIIB
+$18.9M
4
GLD icon
SPDR Gold Trust
GLD
+$18.3M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$13.6M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.26%
2 Technology 0.76%
3 Consumer Discretionary 0.58%
4 Communication Services 0.34%
5 Healthcare 0.32%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AMWD
7226
DELISTED
American Woodmark
AMWD
– –
-204
Closed -$20.5K
AMZA icon
7227
CALL
InfraCap MLP ETF
AMZA
$489M
– –
-19
Closed -$94K
AMZA icon
7228
InfraCap MLP ETF
AMZA
$489M
– –
-487
Closed -$21.6K
AN icon
7229
AutoNation
AN
$7.02B
– –
-3,361
Closed -$170K
ANDE icon
7230
Andersons Inc
ANDE
$2.35B
– –
-704
Closed -$15.4K
ANET icon
7231
Arista Networks
ANET
$244B
– –
-38,272
Closed -$503K
ANF icon
7232
Abercrombie & Fitch
ANF
$6.65B
– –
-47,356
Closed -$783K
ANGI icon
7233
Angi Inc
ANGI
$199M
– –
-2,394
Closed -$179K
ANGO icon
7234
CALL
AngioDynamics
ANGO
$628M
– –
-108
Closed -$198K
AON icon
7235
Aon
AON
$68.5B
– –
-3,635
Closed -$720K
AOSL icon
7236
Alpha and Omega Semiconductor
AOSL
$763M
– –
-123
Closed -$1.55K
AP icon
7237
Ampco-Pittsburgh
AP
$179M
– –
-37
Closed –
APA icon
7238
APA Corp
APA
$15B
– –
-4,002
Closed -$90.6K
APEI icon
7239
American Public Education
APEI
$830M
– –
-256
Closed -$6.25K
APLS
7240
DELISTED
Apellis Pharmaceuticals
APLS
– –
-2,489
Closed -$68.9K
APT icon
7241
Alpha Pro Tech
APT
$54.7M
– –
-949
Closed -$3K
APT icon
7242
PUT
Alpha Pro Tech
APT
$54.7M
– –
-10
Closed -$3K
APYX icon
7243
Apyx Medical
APYX
$128M
– –
-82
Closed –
AQMS icon
7244
PUT
Aqua Metals
AQMS
$10.7M
– –
0
– -$3K
ARES icon
7245
Ares Management
ARES
$31.6B
– –
-289
Closed -$8.98K
ARGT icon
7246
Global X MSCI Argentina ETF
ARGT
$819M
– –
-382
Closed -$8K
ARMK icon
7247
Aramark
ARMK
$15B
– –
-57,793
Closed -$1.81M
ARR
7248
Armour Residential REIT
ARR
$2.31B
– –
-1,281
Closed -$109K
ASA
7249
PUT
ASA Gold and Precious Metals
ASA
$1.19B
– –
-10
Closed -$12K
ARW icon
7250
Arrow Electronics
ARW
$11B
– –
-1,933
Closed -$154K
288 289
290
291 292

Similar funds

Creative Planning
Creative Planning Overland Park, Kansas $171B AUM 24.68% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return
California Public Employees Retirement System
California Public Employees Retirement System Sacramento, California $177B AUM 39.86% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return

Simplex Trading's Q4 2019 Portfolio in Review

As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.

Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.

By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
  • Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
  • Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
  • Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
  • Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
  • Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.

Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.