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
+6.87%
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
$2.45B
AUM Growth
+$147M
Cap. Flow
+$45.1M
Cap. Flow %
1.84%
Top 10 Hldgs %
23.61%
Holding
7,357
New
1,313
Increased
2,078
Reduced
2,339
Closed
1,500

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$45.9M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$30.1M
3
TWX
Time Warner Inc
TWX
+$25.8M
4
BKNG icon
Booking.com
BKNG
+$22.5M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$17.7M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$43.6M
2
AMGN icon
Amgen
AMGN
+$33.2M
3
BIDU icon
Baidu
BIDU
+$19.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$17.3M
5
MU icon
Micron Technology
MU
+$17.1M

Sector Composition

Rank Sector Weight
1 Miscellaneous 39.59%
2 Consumer Discretionary 14.54%
3 Technology 13.33%
4 Communication Services 11.89%
5 Healthcare 4.58%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SRDX
6601
CALL
DELISTED
Surmodics
SRDX
– –
-13
Closed -$7K
SRE icon
6602
CALL
Sempra
SRE
$55B
– –
-98
Closed -$2K
SRE icon
6603
Sempra
SRE
$55B
– –
-5,800
Closed -$335K
SRL icon
6604
Scully Royalty
SRL
$86.8M
– –
-20
Closed -$178
SRL icon
6605
PUT
Scully Royalty
SRL
$86.8M
– –
-1
Closed -$2K
SSL icon
6606
CALL
Sasol
SSL
$7.87B
– –
-245
Closed -$3K
SSNC icon
6607
SS&C Technologies
SSNC
$19.6B
– –
-4,340
Closed -$167K
SSNC icon
6608
PUT
SS&C Technologies
SSNC
$19.6B
– –
-59
Closed -$5K
NSLR
6609
PUT
Neostellar Capital Corp
NSLR
$267M
– –
-130
Closed -$8K
ST icon
6610
PUT
Sensata Technologies
ST
$6.27B
– –
-104
Closed -$7K
STE icon
6611
CALL
Steris
STE
$21.9B
– –
-8
Closed -$2K
STKL
6612
CALL
DELISTED
SunOpta
STKL
– –
-80
Closed -$8K
STM icon
6613
STMicroelectronics
STM
$46.6B
– –
-9,743
Closed -$168K
STNG icon
6614
CALL
Scorpio Tankers
STNG
$4.12B
– –
-20
Closed -$1K
STRR
6615
DELISTED
Star Equity Holdings
STRR
– –
-2
Closed –
STX icon
6616
Seagate
STX
$192B
– –
-12,697
Closed -$431K
SUI icon
6617
CALL
Sun Communities
SUI
$14.5B
– –
-118
Closed -$5K
SVC
6618
PUT
Service Properties Trust
SVC
$986M
– –
-4
Closed -$2K
SVXY icon
6619
ProShares Short VIX Short-Term Futures ETF
SVXY
$258M
– –
-600
Closed -$96K
SYF icon
6620
Synchrony
SYF
$26B
– –
-156,537
Closed -$4.68M
SYNA icon
6621
Synaptics
SYNA
$3.87B
– –
-10,410
Closed -$469K
TAN icon
6622
Invesco Solar ETF
TAN
$1.03B
– –
-1,662
Closed -$33K
TCBI icon
6623
PUT
Texas Capital Bancshares
TCBI
$4.29B
– –
-14
Closed -$3K
TCPC icon
6624
CALL
BlackRock TCP Capital
TCPC
$341M
– –
-55
Closed -$1K
TDW icon
6625
CALL
Tidewater
TDW
$4.69B
– –
-2
Closed -$1K
263 264
265
266 267

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 Q3 2017 Portfolio in Review

As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.

By sector, the portfolio is most concentrated in Miscellaneous at 40% of assets, down from 40% a quarter earlier, followed by Consumer Discretionary and Technology.

  • Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
  • Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
  • Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
  • Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
  • Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
  • Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.

Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.