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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
-0.41%
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
$1.25B
AUM Growth
-$22.5M
Cap. Flow
-$16M
Cap. Flow %
-1.28%
Top 10 Hldgs %
17.26%
Holding
7,084
New
1,678
Increased
2,214
Reduced
1,528
Closed
1,505

Top Buys

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$33.7M
2
GLD icon
SPDR Gold Trust
GLD
+$17.8M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$14.3M
4
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$11.9M
5
C icon
Citigroup
C
+$8.7M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.2M
2
GMCR
KEURIG GREEN MTN INC
GMCR
+$17.9M
3
CMG icon
Chipotle Mexican Grill
CMG
+$14.7M
4
DIS icon
Walt Disney
DIS
+$13.3M
5
BKNG icon
Booking.com
BKNG
+$12.1M

Sector Composition

Rank Sector Weight
1 Technology 7.64%
2 Communication Services 6.85%
3 Consumer Discretionary 4.92%
4 Healthcare 4.57%
5 Financials 4.22%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SSNC icon
6201
PUT
SS&C Technologies
SSNC
$16.1B
– –
-172
Closed -$2K
STE icon
6202
Steris
STE
$20.5B
– –
-940
Closed -$63.6K
STLD icon
6203
PUT
Steel Dynamics
STLD
$34.7B
– –
-46
Closed -$5K
STNG icon
6204
CALL
Scorpio Tankers
STNG
$3.95B
– –
-4
Closed -$2K
STRA icon
6205
Strategic Education
STRA
$1.7B
– –
-941
Closed -$46.4K
STRL icon
6206
Sterling Infrastructure
STRL
$22B
– –
-670
Closed -$3.37K
STX icon
6207
Seagate
STX
$207B
– –
-2,394
Closed -$77.2K
SUI icon
6208
Sun Communities
SUI
$14.8B
– –
-244
Closed -$16K
SUP
6209
DELISTED
Superior Industries International
SUP
– –
-394
Closed -$7.73K
SUP
6210
PUT
DELISTED
Superior Industries International
SUP
– –
-15
Closed -$1K
SWK icon
6211
Stanley Black & Decker
SWK
$13.6B
– –
-2,789
Closed -$271K
SWKS icon
6212
Skyworks Solutions
SWKS
$9.1B
– –
-11,882
Closed -$806K
SXC icon
6213
PUT
SunCoke Energy
SXC
$763M
– –
-12
Closed -$2K
SXI icon
6214
Standex International
SXI
$3.74B
– –
-4,086
Closed -$339K
SYK icon
6215
PUT
Stryker
SYK
$122B
– –
-32
Closed -$7K
T icon
6216
AT&T
T
$160B
– –
-6,620
Closed -$183K
TACT icon
6217
Transact Technologies
TACT
$51.1M
– –
-74
Closed –
TAL icon
6218
CALL
TAL Education Group
TAL
$5.74B
– –
-66
Closed -$2K
TBF icon
6219
ProShares Short 20+ Year Treasury ETF
TBF
$85.1M
– –
-3,231
Closed -$79K
TBPH icon
6220
Theravance Biopharma
TBPH
$874M
$0 ﹤0.01%
+3
New +$49
TDC icon
6221
Teradata
TDC
$2.6B
– –
-10,591
Closed -$262K
TDIV icon
6222
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.07B
– –
-108
Closed -$2K
TDOC icon
6223
Teladoc Health
TDOC
$1.56B
– –
-200
Closed -$2.84K
TEAM icon
6224
Atlassian
TEAM
$20.3B
– –
-52
Closed -$1.22K
TECK icon
6225
Teck Resources
TECK
$29.3B
– –
-23,823
Closed -$129K
247 248
249
250 251

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Simplex Trading's Q1 2016 Portfolio in Review

As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.

By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

  • Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
  • Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
  • Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
  • Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
  • Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
  • Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
  • Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.

Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.