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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+5.95%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$1.28B
AUM Growth
-$87.1M
Cap. Flow
+$39.7M
Cap. Flow %
3.11%
Top 10 Hldgs %
18.64%
Holding
7,008
New
1,415
Increased
1,993
Reduced
1,803
Closed
1,598

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.8M
2
BHC icon
Bausch Health
BHC
+$20.3M
3
CMG icon
Chipotle Mexican Grill
CMG
+$18.9M
4
GMCR
KEURIG GREEN MTN INC
GMCR
+$12.3M
5
AMZN icon
Amazon
AMZN
+$12.2M

Top Sells

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$27.5M
2
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$13.8M
3
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$12.1M
4
NFLX icon
Netflix
NFLX
+$10.7M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$10.7M

Sector Composition

Rank Sector Weight
1 Miscellaneous 51.63%
2 Consumer Discretionary 9.7%
3 Healthcare 7.81%
4 Technology 7.23%
5 Communication Services 6.86%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
THS
6126
DELISTED
Treehouse Foods
THS
– –
-4,053
Closed -$338K
THS
6127
PUT
DELISTED
Treehouse Foods
THS
– –
-4
Closed -$3K
TITN icon
6128
Titan Machinery
TITN
$617M
– –
-5,597
Closed -$65K
TLK icon
6129
Telkom Indonesia
TLK
$14.6B
– –
-3,272
Closed -$67.3K
TLPH icon
6130
CALL
Talphera
TLPH
$62.3M
– –
-17
Closed -$4K
TLT icon
6131
iShares 20+ Year Treasury Bond ETF
TLT
$47.1B
– –
-97,748
Closed -$12.1M
TMHC
6132
PUT
DELISTED
Taylor Morrison
TMHC
– –
-12
Closed -$2K
TNC icon
6133
Tennant Co
TNC
$1.23B
$0 ﹤0.01%
7
-680
-99% -$40K
TNC icon
6134
PUT
Tennant Co
TNC
$1.23B
– –
-7
Closed -$6K
TNET icon
6135
TriNet
TNET
$3.17B
– –
-7,763
Closed -$147K
TNET icon
6136
PUT
TriNet
TNET
$3.17B
– –
-98
Closed -$73K
TNK icon
6137
Teekay Tankers
TNK
$3.24B
– –
-1,644
Closed -$96.7K
TOUR
6138
PUT
Tuniu
TOUR
$54.8M
– –
-6
Closed -$6K
TRAK icon
6139
ReposiTrak
TRAK
$144M
– –
-1,644
Closed -$18.3K
TRAK icon
6140
PUT
ReposiTrak
TRAK
$144M
– –
-16
Closed -$2K
TRGP icon
6141
Targa Resources
TRGP
$62.2B
– –
-1,712
Closed -$76K
TRI icon
6142
CALL
Thomson Reuters
TRI
$45.8B
– –
-13
Closed -$2K
TRI icon
6143
Thomson Reuters
TRI
$45.8B
– –
-388
Closed -$18K
TRIB
6144
Trinity Biotech
TRIB
$7.65M
– –
0
– –
TRMB icon
6145
Trimble
TRMB
$13.9B
– –
-14,378
Closed -$299K
TRS icon
6146
TriMas Corp
TRS
$1.42B
– –
-503
Closed -$9.74K
TRS icon
6147
PUT
TriMas Corp
TRS
$1.42B
– –
-10
Closed -$10K
TRUE
6148
PUT
DELISTED
TrueCar
TRUE
– –
-36
Closed -$3K
TS icon
6149
CALL
Tenaris
TS
$28.5B
– –
-12
Closed -$1K
TS icon
6150
Tenaris
TS
$28.5B
– –
-416
Closed -$10.5K
244 245
246
247 248

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Simplex Trading's Q4 2015 Portfolio in Review

As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

Simplex Trading deployed $39.7M of net new capital in Q4 2015, opening 1,415 new positions and adding to 1,993 existing holdings. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.

By sector, the portfolio is most concentrated in Miscellaneous at 52% of assets, down from 65% a quarter earlier, followed by Consumer Discretionary and Healthcare.

On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $13.8M trimmed.

  • Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
  • Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
  • Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
  • Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
  • Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
  • Simplex Trading opened 1,415 new positions and closed 1,598 in Q4 2015.
  • Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.

Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.