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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
+7.55%
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
$31.1B
AUM Growth
+$5.63B
Cap. Flow
+$12.2M
Cap. Flow %
0.04%
Top 10 Hldgs %
33.61%
Holding
8,699
New
1,336
Increased
3,066
Reduced
2,755
Closed
1,315

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$148M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$67.3M
3
META icon
Meta Platforms (Facebook)
META
+$63.2M
4
GS icon
Goldman Sachs
GS
+$23.9M
5
C icon
Citigroup
C
+$23.1M

Top Sells

Rank Stock Value
1
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$47.5M
2
AAPL icon
Apple
AAPL
+$46M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$44.5M
4
MU icon
Micron Technology
MU
+$29.1M
5
ADBE icon
Adobe
ADBE
+$22.2M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 1.13%
2 Communication Services 0.89%
3 Technology 0.68%
4 Industrials 0.51%
5 Healthcare 0.44%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
VALE icon
8126
Vale
VALE
$63.2B
– –
-33,293
Closed -$449K
VAW icon
8127
Vanguard Materials ETF
VAW
$2.99B
– –
-1,473
Closed -$193K
VB icon
8128
Vanguard Small-Cap ETF
VB
$79.7B
– –
-195
Closed -$30K
VBR icon
8129
Vanguard Small-Cap Value ETF
VBR
$37B
– –
-660
Closed -$89K
VCEL icon
8130
Vericel Corp
VCEL
$2.28B
– –
-2,980
Closed -$34.9K
VCR icon
8131
Vanguard Consumer Discretionary ETF
VCR
$6.07B
– –
-2,008
Closed -$354K
VDC icon
8132
Vanguard Consumer Staples ETF
VDC
$7.88B
– –
-285
Closed -$38K
VECO icon
8133
PUT
Veeco
VECO
$3.33B
– –
-113
Closed -$161K
VEON icon
8134
VEON
VEON
$3.68B
– –
-544
Closed -$39.5K
VEON icon
8135
PUT
VEON
VEON
$3.68B
– –
-7
Closed -$42K
VHT icon
8136
Vanguard Health Care ETF
VHT
$17.8B
– –
-156
Closed -$24K
VICI icon
8137
CALL
VICI Properties
VICI
$29.3B
– –
-4
Closed -$8K
VLRS
8138
Controladora Vuela Compania de Aviacion
VLRS
$902M
– –
-15,625
Closed -$112K
VMI icon
8139
Valmont Industries
VMI
$9.46B
– –
-381
Closed -$53.6K
VNET
8140
VNET Group
VNET
$2.23B
– –
-9,873
Closed -$96.5K
VOC icon
8141
VOC Energy
VOC
$57M
$0 ﹤0.01%
+126
New +$716
VOE icon
8142
Vanguard Mid-Cap Value ETF
VOE
$23.5B
– –
-23
Closed -$2K
VOX icon
8143
Vanguard Communication Services ETF
VOX
$5.7B
– –
-59
Closed -$5K
VPG icon
8144
PUT
Vishay Precision Group
VPG
$1.47B
– –
-71
Closed -$270K
VRA icon
8145
Vera Bradley
VRA
$109M
– –
-5,328
Closed -$77.8K
VREX icon
8146
Varex Imaging
VREX
$449M
$0 ﹤0.01%
+31
New +$1.02K
VRNS icon
8147
Varonis Systems
VRNS
$5.2B
– –
-33,561
Closed -$815K
VSAT icon
8148
Viasat
VSAT
$10.2B
– –
-2,663
Closed -$175K
VUG icon
8149
Vanguard Growth ETF
VUG
$222B
– –
-1,278
Closed -$31K
VUZI icon
8150
Vuzix
VUZI
$201M
– –
-13,644
Closed -$91.7K
324 325
326
327 328

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Simplex Trading's Q3 2018 Portfolio in Review

As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.

Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.

  • Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
  • Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
  • Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
  • Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
  • Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
  • Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
  • Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.

Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.