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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
-10.88%
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
$1.36B
AUM Growth
+$171M
Cap. Flow
+$1.3M
Cap. Flow %
0.1%
Top 10 Hldgs %
15.2%
Holding
7,014
New
1,810
Increased
2,203
Reduced
1,391
Closed
1,420

Top Buys

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$29.8M
2
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$17.1M
3
DIS icon
Walt Disney
DIS
+$14.8M
4
GILD icon
Gilead Sciences
GILD
+$11.8M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$11.2M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$92.9M
2
AAPL icon
Apple
AAPL
+$22.5M
3
META icon
Meta Platforms (Facebook)
META
+$20.5M
4
IBM icon
IBM
IBM
+$12.7M
5
BIDU icon
Baidu
BIDU
+$10M

Sector Composition

Rank Sector Weight
1 Healthcare 6.46%
2 Communication Services 4.66%
3 Consumer Discretionary 4.6%
4 Technology 4.57%
5 Financials 4.49%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GTY
5751
Getty Realty Corp
GTY
$2.1B
– –
-36
Closed –
GURE
5752
Gulf Resources
GURE
$5.23M
$0 ﹤0.01%
4
-21
-84% -$1.89K
GVA icon
5753
Granite Construction
GVA
$5.45B
$0 ﹤0.01%
+28
New +$941
GWRE icon
5754
CALL
Guidewire Software
GWRE
$11.5B
– –
-90
Closed -$1K
GXC icon
5755
State Street SPDR S&P China ETF
GXC
$445M
– –
-532
Closed -$47K
GYRE icon
5756
Gyre Therapeutics
GYRE
$662M
– –
-1
Closed -$1K
GYRE icon
5757
PUT
Gyre Therapeutics
GYRE
$662M
– –
0
– -$1K
H icon
5758
Hyatt Hotels
H
$17.6B
– –
-481
Closed -$25.7K
HACK icon
5759
CALL
Amplify Cybersecurity ETF
HACK
$2.63B
– –
-94
Closed -$24K
HACK icon
5760
Amplify Cybersecurity ETF
HACK
$2.63B
– –
-22,416
Closed -$707K
HACK icon
5761
PUT
Amplify Cybersecurity ETF
HACK
$2.63B
– –
-221
Closed -$25K
HAIN icon
5762
Hain Celestial
HAIN
$47.8M
– –
-1,989
Closed -$126K
HASI icon
5763
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
– –
-2
Closed –
HBAN icon
5764
CALL
Huntington Bancshares
HBAN
$35.1B
– –
-168
Closed -$6K
HBI
5765
DELISTED
Hanesbrands
HBI
– –
-9,833
Closed -$305K
HCI icon
5766
HCI Group
HCI
$2.28B
– –
-2,122
Closed -$87.9K
HD icon
5767
Home Depot
HD
$332B
– –
-2,890
Closed -$334K
HHH icon
5768
Howard Hughes
HHH
$3.93B
– –
-272
Closed -$33.9K
HI
5769
PUT
DELISTED
Hillenbrand
HI
– –
-101
Closed -$3K
HII icon
5770
Huntington Ingalls Industries
HII
$11.3B
– –
-635
Closed -$72.4K
HIW icon
5771
Highwoods Properties
HIW
$3.71B
– –
-1,170
Closed -$46K
HIW icon
5772
PUT
Highwoods Properties
HIW
$3.71B
– –
-22
Closed -$3K
HMC icon
5773
Honda
HMC
$36.5B
– –
-2,900
Closed -$92.8K
MCHB
5774
CALL
Mechanics Bancorp
MCHB
$3.47B
– –
-1
Closed -$1K
HNI icon
5775
HNI Corp
HNI
$3B
– –
-65
Closed -$3K
229 230
231
232 233

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Simplex Trading's Q3 2015 Portfolio in Review

As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.

By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.

  • Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
  • Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
  • Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
  • Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
  • Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
  • Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
  • Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.

Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.