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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
+2.14%
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
$860M
AUM Growth
+$34.4M
Cap. Flow
-$17.8M
Cap. Flow %
-2.07%
Top 10 Hldgs %
14.96%
Holding
6,670
New
1,973
Increased
1,386
Reduced
1,513
Closed
1,643

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$40.1M
2
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$12.5M
3
BABA icon
Alibaba
BABA
+$10.5M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$9.89M
5
INTC icon
Intel
INTC
+$9.83M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$35.7M
2
GILD icon
Gilead Sciences
GILD
+$32.3M
3
AMZN icon
Amazon
AMZN
+$29M
4
BKNG icon
Booking.com
BKNG
+$28.4M
5
BIDU icon
Baidu
BIDU
+$13.3M

Sector Composition

Rank Sector Weight
1 Communication Services 7.76%
2 Consumer Discretionary 7.62%
3 Healthcare 7.24%
4 Technology 6.95%
5 Financials 4.83%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CAMT icon
4051
PUT
Camtek
CAMT
$7.07B
$2K ﹤0.01%
+130
New +$408
CB icon
4052
CALL
Chubb
CB
$139B
$2K ﹤0.01%
+5
New +$562
CBZ icon
4053
CALL
CBIZ
CBZ
$2.39B
$2K ﹤0.01%
+25
New +$219
CCEP icon
4054
PUT
Coca-Cola Europacific Partners
CCEP
$48.1B
$2K ﹤0.01%
15
-9
-38% -$393
CCK icon
4055
CALL
Crown Holdings
CCK
$12.9B
$2K ﹤0.01%
11
– –
CCOI icon
4056
CALL
Cogent Communications
CCOI
$612M
$2K ﹤0.01%
23
-1
-4% -$37
CERS icon
4057
CALL
Cerus
CERS
$615M
$2K ﹤0.01%
94
-151
-62% -$773
CFR icon
4058
Cullen/Frost Bankers
CFR
$10.3B
$2K ﹤0.01%
+31
New +$2.08K
CHRW icon
4059
PUT
C.H. Robinson
CHRW
$20.6B
$2K ﹤0.01%
56
+1
+2% +$73
CLMT icon
4060
CALL
Calumet Specialty Products
CLMT
$3.6B
$2K ﹤0.01%
+10
New +$253
CLX icon
4061
PUT
Clorox
CLX
$11.8B
$2K ﹤0.01%
112
+11
+11% +$1.19K
CMPR icon
4062
PUT
Cimpress
CMPR
$2.41B
$2K ﹤0.01%
+131
New +$10.5K
CODI icon
4063
CALL
Compass Diversified
CODI
$755M
$2K ﹤0.01%
+49
New +$815
COHR icon
4064
PUT
Coherent
COHR
$53.1B
$2K ﹤0.01%
18
+4
+29% +$66
COLB icon
4065
CALL
Columbia Banking Systems
COLB
$8.74B
$2K ﹤0.01%
+20
New +$549
VISN
4066
PUT
Vistance Networks Inc
VISN
$2.67B
$2K ﹤0.01%
17
-14
-45% -$390
CP icon
4067
CALL
Canadian Pacific Kansas City
CP
$81.1B
$2K ﹤0.01%
305
+65
+27% +$2.4K
CPSS icon
4068
Consumer Portfolio Services
CPSS
$201M
$2K ﹤0.01%
398
+18
+5% +$121
CQP icon
4069
CALL
Cheniere Energy
CQP
$30.5B
$2K ﹤0.01%
7
-111
-94% -$3.42K
CRIS icon
4070
PUT
Curis
CRIS
$9.14M
– –
0
– –
CRI icon
4071
PUT
Carter's
CRI
$1.43B
$2K ﹤0.01%
88
+76
+633% +$6.57K
CSR
4072
CALL
Centerspace
CSR
$937M
$2K ﹤0.01%
+1
New +$79
CXT icon
4073
CALL
Crane NXT
CXT
$3.12B
$2K ﹤0.01%
+366
New +$7.98K
BGMS
4074
Bio Green Med Solution Inc
BGMS
$5.1M
– –
0
– –
DAKT icon
4075
Daktronics
DAKT
$956M
$2K ﹤0.01%
192
+35
+22% +$406
161 162
163
164 165

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Simplex Trading's Q1 2015 Portfolio in Review

As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.

By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
  • Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
  • Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
  • Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
  • Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
  • Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
  • Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.

Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.