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
+1.87%
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
$1.67B
AUM Growth
+$199M
Cap. Flow
+$181M
Cap. Flow %
10.79%
Top 10 Hldgs %
20.01%
Holding
7,301
New
1,543
Increased
2,137
Reduced
2,023
Closed
1,480

Top Buys

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$49.8M
2
AAPL icon
Apple
AAPL
+$24.5M
3
C icon
Citigroup
C
+$23.5M
4
AMZN icon
Amazon
AMZN
+$22.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$18.5M

Top Sells

Rank Stock Value
1
LNKD
LinkedIn Corporation
LNKD
+$17.4M
2
WFC icon
Wells Fargo
WFC
+$13.5M
3
MDVN
MEDIVATION, INC.
MDVN
+$8.62M
4
GS icon
Goldman Sachs
GS
+$8.5M
5
HYG icon
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
+$8.15M

Sector Composition

Rank Sector Weight
1 Communication Services 8.76%
2 Technology 7.19%
3 Healthcare 6.91%
4 Consumer Discretionary 6.53%
5 Financials 5.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
WRB icon
6626
PUT
W.R. Berkley
WRB
$27.1B
– –
-135
Closed -$2K
WSO icon
6627
CALL
Watsco Inc
WSO
$14.9B
– –
-23
Closed -$2K
WSR
6628
DELISTED
Whitestone REIT
WSR
– –
-200
Closed -$2.69K
WT icon
6629
WisdomTree
WT
$2.98B
– –
-1,774
Closed -$18.5K
WTFC icon
6630
Wintrust Financial
WTFC
$10.6B
– –
-14
Closed -$869
WTW icon
6631
Willis Towers Watson
WTW
$27B
– –
-747
Closed -$93.1K
WTW icon
6632
PUT
Willis Towers Watson
WTW
$27B
– –
-35
Closed -$7K
WW
6633
DELISTED
WW International
WW
– –
-3,256
Closed -$35.1K
WWD icon
6634
Woodward
WWD
$24.6B
– –
-93
Closed -$6.01K
XBIT icon
6635
CALL
XBiotech
XBIT
$69.2M
– –
-35
Closed -$5K
XBIT icon
6636
XBiotech
XBIT
$69.2M
– –
-4,086
Closed -$54.4K
XES icon
6637
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$385M
– –
-576
Closed -$109K
XIN
6638
CALL
DELISTED
Xinyuan Real Estate
XIN
– –
-4
Closed -$6K
XIN
6639
DELISTED
Xinyuan Real Estate
XIN
– –
-1,100
Closed -$60.3K
XLB icon
6640
State Street Materials Select Sector SPDR ETF
XLB
$8.36B
– –
-104
Closed -$2.52K
XNCR icon
6641
PUT
Xencor
XNCR
$1.47B
– –
-351
Closed -$10K
XNET
6642
CALL
Xunlei
XNET
$357M
– –
-134
Closed -$39K
XNET
6643
Xunlei
XNET
$357M
$0 ﹤0.01%
+161
New +$737
XNET
6644
PUT
Xunlei
XNET
$357M
– –
-90
Closed -$1K
XOMA
6645
PUT
DELISTED
Xoma
XOMA
– –
-4
Closed -$7K
XPO icon
6646
XPO
XPO
$25.2B
– –
-2,079
Closed -$29K
XRAY icon
6647
CALL
Dentsply Sirona
XRAY
$2.5B
– –
-106
Closed -$7K
XRX icon
6648
CALL
Xerox
XRX
$335M
– –
-126
Closed -$11K
XWEL icon
6649
XWELL
XWEL
$8.87M
– –
0
– –
XYL icon
6650
CALL
Xylem
XYL
$27.7B
– –
-20
Closed -$7K
264 265
266
267 268

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 Q4 2016 Portfolio in Review

As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.

By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.

On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.

  • Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
  • Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
  • Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
  • Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
  • Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
  • Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
  • Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.

Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.