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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
+4.52%
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
$2.3B
AUM Growth
-$8.99M
Cap. Flow
-$114M
Cap. Flow %
-4.94%
Top 10 Hldgs %
22.88%
Holding
7,527
New
1,408
Increased
2,202
Reduced
2,320
Closed
1,474

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$83.1M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$37.2M
3
AMGN icon
Amgen
AMGN
+$30.5M
4
MU icon
Micron Technology
MU
+$28.8M
5
QCOM icon
Qualcomm
QCOM
+$18.2M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$29.5M
2
GS icon
Goldman Sachs
GS
+$27.8M
3
GILD icon
Gilead Sciences
GILD
+$27.6M
4
BKNG icon
Booking.com
BKNG
+$25.4M
5
T icon
AT&T
T
+$19.6M

Sector Composition

Rank Sector Weight
1 Technology 13.55%
2 Communication Services 11.57%
3 Consumer Discretionary 9.69%
4 Healthcare 7.28%
5 Financials 4.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ARAY icon
5176
PUT
Accuray
ARAY
$29M
$2K ﹤0.01%
142
+31
+28% +$136
EFOR
5177
CALL
Everforth Inc
EFOR
$953M
$2K ﹤0.01%
5
-12
-71% -$616
ATHM icon
5178
PUT
Autohome
ATHM
$2.65B
$2K ﹤0.01%
22
-184
-89% -$7.13K
ATO icon
5179
CALL
Atmos Energy
ATO
$29.9B
$2K ﹤0.01%
14
-12
-46% -$984
ATRA icon
5180
PUT
Atara Biotherapeutics
ATRA
$70.4M
$2K ﹤0.01%
+1
New +$385
AVD icon
5181
PUT
American Vanguard Corp
AVD
$74.1M
$2K ﹤0.01%
+36
New +$620
AWRE icon
5182
Aware
AWRE
$24.2M
$2K ﹤0.01%
390
-18
-4% -$86
BBVA icon
5183
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$147B
$2K ﹤0.01%
30
+3
+11% +$24
BDC icon
5184
CALL
Belden
BDC
$4.09B
$2K ﹤0.01%
+2
New +$143
BHR
5185
PUT
Braemar Hotels & Resorts
BHR
$160M
$2K ﹤0.01%
14
-202
-94% -$2.06K
BIP icon
5186
CALL
Brookfield Infrastructure Partners
BIP
$19.3B
$2K ﹤0.01%
+30
New +$710
BKD icon
5187
Brookdale Senior Living
BKD
$3.67B
$2K ﹤0.01%
+200
New +$2.76K
BN icon
5188
CALL
Brookfield
BN
$104B
$2K ﹤0.01%
+70
New +$942
BNS icon
5189
CALL
Scotiabank
BNS
$108B
$2K ﹤0.01%
+34
New +$1.95K
BOH icon
5190
PUT
Bank of Hawaii
BOH
$3.16B
$2K ﹤0.01%
+10
New +$806
BOOT icon
5191
Boot Barn
BOOT
$4.81B
$2K ﹤0.01%
393
-16,465
-98% -$142K
BSX icon
5192
PUT
Boston Scientific
BSX
$68.5B
$2K ﹤0.01%
+104
New +$2.76K
BTE icon
5193
CALL
Baytex Energy
BTE
$2.86B
$2K ﹤0.01%
+70
New +$209
BW icon
5194
CALL
Babcock & Wilcox
BW
$1.31B
$2K ﹤0.01%
+3
New +$310
CAR icon
5195
Avis
CAR
$5.88B
$2K ﹤0.01%
+100
New +$2.58K
CIA icon
5196
PUT
Citizens
CIA
$257M
$2K ﹤0.01%
81
+52
+179% +$343
CIM
5197
CALL
Chimera Investment
CIM
$1.06B
$2K ﹤0.01%
57
+3
+6% +$174
CLNE icon
5198
CALL
Clean Energy Fuels
CLNE
$421M
$2K ﹤0.01%
120
+14
+13% +$35
CLW icon
5199
CALL
Clearwater Paper
CLW
$282M
$2K ﹤0.01%
+9
New +$435
COO icon
5200
PUT
Cooper Companies
COO
$14.1B
$2K ﹤0.01%
+336
New +$18.3K
206 207
208
209 210

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Simplex Trading's Q2 2017 Portfolio in Review

As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.

By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.

  • Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
  • Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
  • Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
  • Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
  • Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
  • Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
  • Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.

Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.