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
+6.87%
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
$2.45B
AUM Growth
+$147M
Cap. Flow
+$26.3M
Cap. Flow %
1.07%
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 Consumer Discretionary 14.31%
2 Technology 13.17%
3 Communication Services 11.81%
4 Healthcare 4.06%
5 Financials 3.84%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AAL icon
5776
American Airlines Group
AAL
$9.58B
– –
-38,638
Closed -$1.87M
AAOI icon
5777
Applied Optoelectronics
AAOI
$8.04B
– –
-1,752
Closed -$124K
AB icon
5778
AllianceBernstein
AB
$3.47B
– –
-2,800
Closed -$67.4K
ABCB icon
5779
CALL
Ameris Bancorp
ABCB
$5.89B
– –
-5
Closed -$1K
ABG icon
5780
Asbury Automotive
ABG
$4.19B
– –
-102
Closed -$5.63K
ABG icon
5781
PUT
Asbury Automotive
ABG
$4.19B
– –
-17
Closed -$1K
ABM icon
5782
ABM Industries
ABM
$2.8B
$0 ﹤0.01%
17
-235
-93% -$10K
ABR icon
5783
Arbor Realty Trust
ABR
$960M
– –
-653
Closed -$5.32K
ABUS icon
5784
Arbutus Biopharma
ABUS
$865M
– –
-1,914
Closed -$8.19K
ACCO icon
5785
PUT
Acco Brands
ACCO
$369M
– –
-9
Closed -$1K
ACGL icon
5786
Arch Capital
ACGL
$36.1B
– –
-14,640
Closed -$455K
ACHV icon
5787
CALL
Achieve Life Sciences
ACHV
$626M
– –
0
– -$4K
ACLS icon
5788
Axcelis
ACLS
$4.12B
– –
-1,084
Closed -$24K
ACM icon
5789
Aecom
ACM
$9.07B
– –
-12,572
Closed -$413K
ACRE
5790
Ares Commercial Real Estate
ACRE
$252M
– –
-569
Closed -$7.46K
ADAP
5791
DELISTED
Adaptimmune Therapeutics
ADAP
$0 ﹤0.01%
87
-222
-72% -$1.39K
ADEA icon
5792
PUT
Adeia
ADEA
$2.86B
– –
-23
Closed -$3K
ADI icon
5793
Analog Devices
ADI
$181B
– –
-55,709
Closed -$4.49M
ADTN icon
5794
PUT
Adtran
ADTN
$798M
– –
-27
Closed -$2K
ADUS icon
5795
CALL
Addus HomeCare
ADUS
$2.14B
– –
-50
Closed -$9K
AEG icon
5796
PUT
Aegon
AEG
$13.5B
– –
-85
Closed -$1K
AEO icon
5797
American Eagle Outfitters
AEO
$2.85B
– –
-5,615
Closed -$68.8K
AES icon
5798
CALL
AES
AES
$10.6B
– –
-48
Closed -$3K
AFG icon
5799
American Financial Group
AFG
$11.9B
– –
-244
Closed -$24.8K
AGEN
5800
CALL
Agenus
AGEN
$249M
– –
-5
Closed -$2K
230 231
232
233 234

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 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 Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.

  • 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.