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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
+6.28%
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
$91.9B
AUM Growth
+$3.47B
Cap. Flow
+$1.91B
Cap. Flow %
2.08%
Top 10 Hldgs %
34.1%
Holding
11,206
New
1,219
Increased
3,365
Reduced
4,370
Closed
1,942

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$170M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$71.3M
3
T icon
AT&T
T
+$44.2M
4
META icon
Meta Platforms (Facebook)
META
+$37.1M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$34.4M

Top Sells

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$94.3M
2
JPM icon
JPMorgan Chase
JPM
+$68.2M
3
C icon
Citigroup
C
+$62.8M
4
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$50.9M
5
GLD icon
SPDR Gold Trust
GLD
+$46.3M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.38%
2 Technology 0.35%
3 Communication Services 0.24%
4 Healthcare 0.2%
5 Consumer Staples 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DYN icon
9426
PUT
Dyne Therapeutics
DYN
$4.04B
– –
-800
Closed -$10K
EA icon
9427
Electronic Arts
EA
$52.4B
– –
-4,721
Closed -$593K
EARN
9428
Ellington Residential Mortgage REIT
EARN
$165M
– –
-940
Closed -$6.46K
EAT icon
9429
Brinker International
EAT
$8.02B
– –
-11,804
Closed -$371K
EBIZ icon
9430
Global X E-commerce ETF
EBIZ
$26.9M
– –
-195
Closed -$2K
EBON icon
9431
CALL
Ebang International Holdings
EBON
– –
-15,833
Closed -$194K
EBON icon
9432
PUT
Ebang International Holdings
EBON
– –
-700
Closed -$8K
ECPG icon
9433
PUT
Encore Capital Group
ECPG
$1.93B
– –
-1,000
Closed -$45K
ECVT icon
9434
CALL
Ecovyst
ECVT
$1.36B
– –
-200
Closed -$1K
ECVT icon
9435
Ecovyst
ECVT
$1.36B
– –
-2,640
Closed -$22K
ECVT icon
9436
PUT
Ecovyst
ECVT
$1.36B
– –
-3,900
Closed -$32K
EDIT icon
9437
Editas Medicine
EDIT
$399M
– –
-41,268
Closed -$453K
EDZ icon
9438
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$18.4M
– –
-5,606
Closed -$1.14M
EEFT icon
9439
PUT
Euronet Worldwide
EEFT
$3.02B
– –
-2,300
Closed -$174K
EFC
9440
Ellington Financial
EFC
$1.68B
– –
-241
Closed -$3.14K
EG icon
9441
Everest Group
EG
$15.2B
– –
-3,882
Closed -$1.21M
EHAB
9442
DELISTED
Enhabit
EHAB
– –
-298
Closed -$3.98K
EHC icon
9443
Encompass Health
EHC
$11.2B
– –
-7,588
Closed -$413K
EHC icon
9444
PUT
Encompass Health
EHC
$11.2B
– –
-2,100
Closed -$16K
ELS icon
9445
CALL
Equity Lifestyle Properties
ELS
$12.8B
– –
-1,000
Closed -$62K
ELVN icon
9446
PUT
Enliven Therapeutics
ELVN
$3.78B
– –
-48,875
Closed -$445K
EMBC icon
9447
CALL
Embecta
EMBC
$195M
– –
-2,800
Closed -$80K
EMX
9448
DELISTED
EMX Royalty
EMX
$0 ﹤0.01%
237
-1,238
-84% -$2.27K
ENIC icon
9449
Enel Chile
ENIC
$5.96B
$0 ﹤0.01%
164
-240
-59% -$441
ENLV icon
9450
PUT
Enlivex Ltd
ENLV
$70.7M
– –
-20
Closed -$1K
376 377
378
379 380

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Simplex Trading's Q4 2022 Portfolio in Review

As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.

Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
  • Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
  • Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
  • Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
  • Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
  • Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
  • Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.

Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.