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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
CQP icon
4426
PUT
Cheniere Energy
CQP
$31.8B
$1K ﹤0.01%
11
-23
-68% -$708
CRH icon
4427
CALL
CRH
CRH
$66.7B
$1K ﹤0.01%
6
-33
-85% -$859
CRMD icon
4428
CALL
CorMedix
CRMD
$617M
$1K ﹤0.01%
+1
New +$24
CRTO icon
4429
PUT
Criteo
CRTO
$1.03B
$1K ﹤0.01%
22
-105
-83% -$4.37K
CSTM icon
4430
PUT
Constellium
CSTM
$3.96B
$1K ﹤0.01%
+12
New +$225
CWT icon
4431
California Water Service
CWT
$3.04B
$1K ﹤0.01%
+50
New +$1.24K
DBRG icon
4432
CALL
DigitalBridge
DBRG
$2.94B
$1K ﹤0.01%
1
-12
-92% -$1.09K
DCO icon
4433
PUT
Ducommun
DCO
$2.68B
$1K ﹤0.01%
6
-4
-40% -$104
DHT icon
4434
PUT
DHT Holdings
DHT
$2.97B
$1K ﹤0.01%
122
-8
-6% -$59
DLTR icon
4435
PUT
Dollar Tree
DLTR
$23.1B
$1K ﹤0.01%
36
+14
+64% +$1.06K
DORM icon
4436
CALL
Dorman Products
DORM
$4.01B
$1K ﹤0.01%
8
+3
+60% +$141
DSX icon
4437
Diana Shipping
DSX
$280M
$1K ﹤0.01%
+428
New +$2K
DVAX
4438
PUT
DELISTED
Dynavax Technologies
DVAX
$1K ﹤0.01%
+33
New +$632
EDU icon
4439
PUT
New Oriental
EDU
$7.84B
$1K ﹤0.01%
21
-83
-80% -$1.67K
EG icon
4440
CALL
Everest Group
EG
$15.2B
$1K ﹤0.01%
+27
New +$4.74K
EGAN icon
4441
PUT
eGain
EGAN
$176M
$1K ﹤0.01%
+2
New +$8
EGO icon
4442
PUT
Eldorado Gold
EGO
$8.31B
$1K ﹤0.01%
+1
New +$27
EHC icon
4443
CALL
Encompass Health
EHC
$11.2B
$1K ﹤0.01%
8
-6
-43% -$205
EHC icon
4444
PUT
Encompass Health
EHC
$11.2B
$1K ﹤0.01%
11
– –
EL icon
4445
CALL
Estee Lauder
EL
$29B
$1K ﹤0.01%
15
-14
-48% -$1.1K
EMN icon
4446
CALL
Eastman Chemical
EMN
$7.8B
$1K ﹤0.01%
24
-3
-11% -$217
ENB icon
4447
PUT
Enbridge
ENB
$124B
$1K ﹤0.01%
6
-4
-40% -$192
ENTA icon
4448
CALL
Enanta Pharmaceuticals
ENTA
$372M
$1K ﹤0.01%
8
+6
+300% +$233
ENVA icon
4449
PUT
Enova International
ENVA
$5.91B
$1K ﹤0.01%
+9
New +$196
EPD icon
4450
CALL
Enterprise Products Partners
EPD
$83.8B
$1K ﹤0.01%
13
-285
-96% -$9.55K
176 177
178
179 180

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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.