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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
FXD icon
5801
PUT
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
– –
-10
Closed -$2K
FXF icon
5802
PUT
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
– –
-28
Closed -$8K
FXI icon
5803
iShares China Large-Cap ETF
FXI
$4.31B
– –
-130,018
Closed -$4.59M
FXP icon
5804
ProShares UltraShort FTSE China 50 of ProShares Trust
FXP
$6.3M
– –
-113
Closed -$37K
GAIN icon
5805
CALL
Gladstone Investment Corp
GAIN
$635M
– –
-28
Closed -$7K
GAU
5806
CALL
Galiano Gold
GAU
$486M
– –
-101
Closed -$1K
GBCI icon
5807
Glacier Bancorp
GBCI
$6.55B
– –
-143
Closed -$3K
GBX icon
5808
The Greenbrier Companies
GBX
$1.61B
– –
-5,121
Closed -$131K
TDAY
5809
CALL
USA Today Co
TDAY
$1.23B
– –
-53
Closed -$27K
TDAY
5810
PUT
USA Today Co
TDAY
$1.23B
– –
-51
Closed -$3K
GD icon
5811
General Dynamics
GD
$105B
– –
-4,301
Closed -$570K
GDDY icon
5812
PUT
GoDaddy
GDDY
$12.3B
– –
-84
Closed -$9K
GDXJ icon
5813
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
– –
-18,125
Closed -$348K
GE icon
5814
GE Aerospace
GE
$367B
– –
-48,663
Closed -$6.87M
GEF icon
5815
Greif
GEF
$4.47B
– –
-3,113
Closed -$85.9K
GEVO icon
5816
Gevo
GEVO
$397M
– –
0
– –
GHM icon
5817
CALL
Graham Corp
GHM
$1.22B
– –
-80
Closed -$5K
GIII icon
5818
G-III Apparel Group
GIII
$1.47B
– –
-3,365
Closed -$163K
GLOB icon
5819
PUT
Globant
GLOB
$1.35B
– –
-17
Closed -$2K
GLP icon
5820
Global Partners
GLP
$1.64B
– –
-114
Closed -$1.7K
GLRE icon
5821
Greenlight Captial
GLRE
$563M
– –
-2,034
Closed -$40.5K
GLRE icon
5822
PUT
Greenlight Captial
GLRE
$563M
– –
-20
Closed -$1K
GLW icon
5823
Corning
GLW
$126B
– –
-39,990
Closed -$741K
GNTX icon
5824
Gentex
GNTX
$4.88B
– –
-828
Closed -$12.1K
GOGL
5825
DELISTED
Golden Ocean Group
GOGL
$0 ﹤0.01%
13
– –
231 232
233
234 235

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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.