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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
APTV icon
4376
PUT
Aptiv
APTV
$12B
$1K ﹤0.01%
+72
New +$5.41K
AR icon
4377
CALL
Antero Resources
AR
$10.9B
$1K ﹤0.01%
+6
New +$225
ARAY icon
4378
CALL
Accuray
ARAY
$28.4M
$1K ﹤0.01%
+28
New +$223
ARI
4379
PUT
Apollo Commercial Real Estate
ARI
$887M
$1K ﹤0.01%
+10
New +$168
ARLP icon
4380
PUT
Alliance Resource Partners
ARLP
$3.18B
$1K ﹤0.01%
27
-7
-21% -$265
ARR
4381
CALL
Armour Residential REIT
ARR
$2.02B
$1K ﹤0.01%
+1
New +$131
ASH icon
4382
PUT
Ashland
ASH
$3.04B
$1K ﹤0.01%
+74
New +$4.48K
ATNM icon
4383
Actinium Pharmaceuticals
ATNM
$27M
$1K ﹤0.01%
+15
New +$1.78K
AVD icon
4384
PUT
American Vanguard Corp
AVD
$73.5M
$1K ﹤0.01%
+31
New +$346
AVNS icon
4385
PUT
Avanos Medical
AVNS
$1.17B
$1K ﹤0.01%
+10
New +$463
AWR icon
4386
CALL
American States Water
AWR
$3.39B
$1K ﹤0.01%
+4
New +$159
AXS icon
4387
CALL
AXIS Capital
AXS
$8.59B
$1K ﹤0.01%
5
– –
BAK icon
4388
PUT
Braskem
BAK
$980M
$1K ﹤0.01%
+5
New +$46
BALL icon
4389
PUT
Ball Corp
BALL
$17B
$1K ﹤0.01%
+14
New +$485
BAP icon
4390
CALL
Credicorp
BAP
$30.9B
$1K ﹤0.01%
+10
New +$1.47K
BBDC icon
4391
PUT
Barings BDC
BBDC
$862M
$1K ﹤0.01%
2
-2
-50% -$45
BBWI icon
4392
PUT
Bath & Body Works
BBWI
$4.01B
$1K ﹤0.01%
27
-53
-66% -$3.83K
BCC icon
4393
CALL
Boise Cascade
BCC
$2.74B
$1K ﹤0.01%
+6
New +$232
BCE icon
4394
CALL
BCE
BCE
$19.9B
$1K ﹤0.01%
38
-41
-52% -$1.83K
BCRX icon
4395
PUT
BioCryst Pharmaceuticals
BCRX
$2.37B
$1K ﹤0.01%
9
-240
-96% -$2.48K
BDC icon
4396
PUT
Belden
BDC
$4B
$1K ﹤0.01%
+5
New +$431
BFH icon
4397
PUT
Bread Financial
BFH
$4.21B
$1K ﹤0.01%
+31
New +$7.08K
BKE icon
4398
CALL
Buckle
BKE
$2.19B
$1K ﹤0.01%
+15
New +$755
BMI icon
4399
Badger Meter
BMI
$3.66B
$1K ﹤0.01%
60
+52
+650% +$1.52K
BMVP icon
4400
CALL
Invesco Bloomberg MVP Multi-factor ETF
BMVP
$104M
$1K ﹤0.01%
3
-72
-96% -$1.78K
174 175
176
177 178

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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.