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
-18.41%
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
$34.1B
AUM Growth
+$2.94B
Cap. Flow
-$227M
Cap. Flow %
-0.67%
Top 10 Hldgs %
42.6%
Holding
8,576
New
1,199
Increased
2,701
Reduced
2,877
Closed
1,572

Top Buys

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$58.5M
2
GOOG icon
Alphabet (Google) Class C
GOOG
+$56.5M
3
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$44.1M
4
AAPL icon
Apple
AAPL
+$20.3M
5
XOP icon
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
+$12.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$109M
2
META icon
Meta Platforms (Facebook)
META
+$62.3M
3
QQQ icon
Invesco QQQ Trust
QQQ
+$36.2M
4
GS icon
Goldman Sachs
GS
+$27.1M
5
BA icon
Boeing
BA
+$24.7M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.5%
2 Communication Services 0.5%
3 Consumer Discretionary 0.49%
4 Technology 0.41%
5 Financials 0.26%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RMAX
7676
DELISTED
RE/MAX Holdings
RMAX
– –
-2,433
Closed -$85K
RM icon
7677
CALL
Regional Management Corp
RM
$311M
– –
-3
Closed -$8K
RM icon
7678
Regional Management Corp
RM
$311M
– –
-11
Closed –
RNAC icon
7679
CALL
Cartesian Therapeutics
RNAC
$280M
– –
0
– -$4K
RNG icon
7680
RingCentral
RNG
$6.13B
– –
-6,181
Closed -$487K
ROG icon
7681
Rogers Corp
ROG
$2.28B
– –
-895
Closed -$107K
ROG icon
7682
PUT
Rogers Corp
ROG
$2.28B
– –
-10
Closed -$147K
ROL icon
7683
Rollins
ROL
$17.3B
– –
-33,408
Closed -$863K
RRX icon
7684
PUT
Regal Rexnord
RRX
$10.8B
– –
-8
Closed -$65K
RSG icon
7685
Republic Services
RSG
$68.2B
– –
-2,653
Closed -$194K
RSP icon
7686
Invesco S&P 500 Equal Weight ETF
RSP
$100B
– –
-3,187
Closed -$340K
RTX icon
7687
CALL
RTX Corp
RTX
$271B
– –
-2,717
Closed -$23.9M
RTX icon
7688
PUT
RTX Corp
RTX
$271B
– –
-1,063
Closed -$9.35M
RYAAY icon
7689
Ryanair
RYAAY
$28.7B
– –
-2,873
Closed -$91.7K
RYAM icon
7690
Rayonier Advanced Materials
RYAM
$575M
– –
-491
Closed -$6.68K
RYZ
7691
PUT
Ryerson Holding Corp
RYZ
$1.37B
– –
-5
Closed -$5K
RYN icon
7692
Rayonier
RYN
$6.09B
– –
-1,773
Closed -$49.1K
SAFE
7693
CALL
Safehold
SAFE
$1.07B
– –
0
– -$1K
SAFE
7694
Safehold
SAFE
$1.07B
$0 ﹤0.01%
12
-40
-77% -$2.02K
SAFE
7695
PUT
Safehold
SAFE
$1.07B
– –
-16
Closed -$87K
SAGE
7696
DELISTED
Sage Therapeutics
SAGE
– –
-2,499
Closed -$286K
SAIA icon
7697
CALL
Saia
SAIA
$9.52B
– –
-4
Closed -$30K
SAIA icon
7698
PUT
Saia
SAIA
$9.52B
– –
-1
Closed -$7K
SAND
7699
DELISTED
Sandstorm Gold
SAND
– –
-2,244
Closed -$9.12K
SANW
7700
DELISTED
S&W Seed Co
SANW
– –
-198
Closed -$9K
306 307
308
309 310

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 2018 Portfolio in Review

As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,572 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.

By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, up from 95% a quarter earlier, followed by Communication Services and Consumer Discretionary.

  • Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
  • Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
  • Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
  • Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
  • Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
  • Simplex Trading opened 1,199 new positions and closed 1,572 in Q4 2018.
  • Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.

Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.