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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
+0.54%
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
$1.19B
AUM Growth
+$333M
Cap. Flow
+$279M
Cap. Flow %
23.35%
Top 10 Hldgs %
20.47%
Holding
6,639
New
1,607
Increased
1,829
Reduced
1,589
Closed
1,438

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.6M
2
AAPL icon
Apple
AAPL
+$29.1M
3
META icon
Meta Platforms (Facebook)
META
+$15.7M
4
IBM icon
IBM
IBM
+$13.8M
5
BIDU icon
Baidu
BIDU
+$10.6M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$10.1M
2
MCD icon
McDonald's
MCD
+$8.46M
3
RL icon
Ralph Lauren
RL
+$5.36M
4
INTC icon
Intel
INTC
+$5.04M
5
WBA
Walgreens Boots Alliance
WBA
+$4.76M

Sector Composition

Rank Sector Weight
1 Communication Services 14.27%
2 Technology 10.3%
3 Healthcare 7.76%
4 Consumer Discretionary 6.32%
5 Financials 5.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ETSY icon
4026
CALL
Etsy
ETSY
$8.21B
$3K ﹤0.01%
+75
New +$1.44K
FDN icon
4027
First Trust Dow Jones Internet Index Fund ETF
FDN
$5B
$3K ﹤0.01%
+51
New +$3.42K
FE icon
4028
PUT
FirstEnergy
FE
$28.7B
$3K ﹤0.01%
20
-93
-82% -$3.25K
GDDY icon
4029
PUT
GoDaddy
GDDY
$13.6B
$3K ﹤0.01%
+40
New +$1.08K
GEF icon
4030
Greif
GEF
$4.74B
$3K ﹤0.01%
+95
New +$3.77K
GIB icon
4031
PUT
CGI
GIB
$15B
$3K ﹤0.01%
+7
New +$302
GTN icon
4032
CALL
Gray Television
GTN
$430M
$3K ﹤0.01%
5
-12
-71% -$176
HAS icon
4033
PUT
Hasbro
HAS
$13.6B
$3K ﹤0.01%
56
-64
-53% -$4.56K
HEES
4034
CALL
DELISTED
H&E Equipment Services
HEES
$3K ﹤0.01%
+33
New +$790
HI
4035
PUT
DELISTED
Hillenbrand
HI
$3K ﹤0.01%
+101
New +$3.12K
HIW icon
4036
PUT
Highwoods Properties
HIW
$3.71B
$3K ﹤0.01%
+22
New +$947
HNI icon
4037
HNI Corp
HNI
$3.17B
$3K ﹤0.01%
+65
New +$3.35K
HRI icon
4038
CALL
Herc Holdings
HRI
$4.95B
$3K ﹤0.01%
47
-15
-24% -$927
HRZN icon
4039
PUT
Horizon Technology Finance
HRZN
$295M
$3K ﹤0.01%
+12
New +$166
IBN icon
4040
CALL
ICICI Bank
IBN
$109B
$3K ﹤0.01%
63
+9
+17% +$85
IDA icon
4041
Idacorp
IDA
$8.24B
$3K ﹤0.01%
68
+4
+6% +$238
IMNN icon
4042
CALL
Imunon
IMNN
$6.43M
– –
0
– –
IMOS
4043
PUT
ChipMOS TECHNOLOGIES
IMOS
$1.73B
$3K ﹤0.01%
+12
New +$308
IQV icon
4044
PUT
IQVIA
IQV
$40.5B
$3K ﹤0.01%
+50
New +$3.43K
IRBT
4045
CALL
DELISTED
iRobot
IRBT
$3K ﹤0.01%
18
-5
-22% -$164
IRWD icon
4046
Ironwood Pharmaceuticals
IRWD
$626M
$3K ﹤0.01%
334
-1,813
-84% -$21.1K
IRWD icon
4047
PUT
Ironwood Pharmaceuticals
IRWD
$626M
$3K ﹤0.01%
+30
New +$349
ITT icon
4048
ITT
ITT
$17.8B
$3K ﹤0.01%
+89
New +$3.71K
ITUB icon
4049
PUT
Itaú Unibanco
ITUB
$91.6B
$3K ﹤0.01%
40
-115
-74% -$541
JLL icon
4050
CALL
Jones Lang LaSalle
JLL
$15.9B
$3K ﹤0.01%
4
+3
+300% +$506
160 161
162
163 164

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Simplex Trading's Q2 2015 Portfolio in Review

As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.

Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.

By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.

On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.

  • Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
  • Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
  • Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
  • Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
  • Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
  • Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.

Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.