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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
+17.83%
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
$36B
AUM Growth
+$1.89B
Cap. Flow
-$586M
Cap. Flow %
-1.63%
Top 10 Hldgs %
34.84%
Holding
8,479
New
1,472
Increased
3,049
Reduced
2,419
Closed
1,324

Top Buys

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$86.9M
2
DIS icon
Walt Disney
DIS
+$25.5M
3
BIDU icon
Baidu
BIDU
+$12.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$12.3M
5
RHT
Red Hat Inc
RHT
+$11.4M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$60.3M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$33.9M
4
AAPL icon
Apple
AAPL
+$21.1M
5
XLF icon
State Street Financial Select Sector SPDR ETF
XLF
+$18.2M

Sector Composition

Rank Sector Weight
1 Communication Services 0.58%
2 Technology 0.42%
3 Healthcare 0.34%
4 Consumer Discretionary 0.29%
5 Industrials 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EWM icon
7301
iShares MSCI Malaysia ETF
EWM
$305M
– –
-1,059
Closed -$31K
EWU icon
7302
iShares MSCI United Kingdom ETF
EWU
$4.04B
– –
-35,255
Closed -$1.03M
EXPE icon
7303
Expedia Group
EXPE
$31.2B
– –
-705
Closed -$85.6K
EXPO icon
7304
Exponent
EXPO
$2.98B
– –
-138
Closed -$7.46K
EYE icon
7305
National Vision
EYE
$1.6B
– –
-115
Closed -$3.62K
EYPT icon
7306
PUT
EyePoint Inc
EYPT
$1.02B
– –
-1
Closed -$1K
FARO
7307
CALL
DELISTED
Faro Technologies
FARO
– –
-2
Closed -$8K
FAZ icon
7308
Direxion Daily Financial Bear 3x ETF
FAZ
$87.7M
– –
-378
Closed -$2.05M
FBP icon
7309
PUT
First Bancorp
FBP
$4.4B
– –
-130
Closed -$111K
FCF icon
7310
First Commonwealth Financial
FCF
$2.12B
– –
-97
Closed -$1K
FCFS icon
7311
FirstCash
FCFS
$8.55B
– –
-168
Closed -$14K
FCN icon
7312
CALL
FTI Consulting
FCN
$4.82B
– –
-1
Closed -$6K
FDUS icon
7313
Fidus Investment
FDUS
$737M
– –
-714
Closed -$10.3K
FDX icon
7314
FedEx
FDX
$74.5B
– –
-20,219
Closed -$3.57M
FELE icon
7315
Franklin Electric
FELE
$4.67B
– –
-2,570
Closed -$110K
FELE icon
7316
PUT
Franklin Electric
FELE
$4.67B
– –
-66
Closed -$283K
FIS icon
7317
Fidelity National Information Services
FIS
$21.5B
– –
-1,630
Closed -$174K
FIVE icon
7318
Five Below
FIVE
$11.2B
– –
-1,192
Closed -$144K
FLWS icon
7319
CALL
1-800-Flowers.com
FLWS
$245M
– –
-2
Closed -$2K
FMX icon
7320
CALL
Fomento Económico Mexicano
FMX
$43.3B
– –
-8
Closed -$68K
FND icon
7321
Floor & Decor
FND
$5.81B
– –
-34,749
Closed -$1.22M
FNF icon
7322
Fidelity National Financial
FNF
$13.9B
– –
-1,009
Closed -$33.8K
FNF icon
7323
PUT
Fidelity National Financial
FNF
$13.9B
– –
-10
Closed -$31K
FOLD
7324
DELISTED
Amicus Therapeutics
FOLD
– –
-9,524
Closed -$116K
FOR icon
7325
Forestar Group
FOR
$1.44B
– –
-508
Closed -$8.33K
291 292
293
294 295

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Simplex Trading's Q1 2019 Portfolio in Review

As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.

By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
  • Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
  • Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
  • Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
  • Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
  • Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
  • Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.

Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.