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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
AMAL icon
9101
PUT
Amalgamated Financial
AMAL
$1.48B
– –
-100
Closed -$2K
AMBA icon
9102
Ambarella
AMBA
$2.99B
– –
-27,188
Closed -$1.81M
AMH icon
9103
American Homes 4 Rent
AMH
$12B
– –
-47,883
Closed -$1.52M
AMH icon
9104
PUT
American Homes 4 Rent
AMH
$12B
– –
-69,100
Closed -$2.27M
AMRX icon
9105
Amneal Pharmaceuticals
AMRX
$5.72B
– –
-3,281
Closed -$7.36K
AMT icon
9106
American Tower
AMT
$77.7B
– –
-12,402
Closed -$2.58M
AMTB icon
9107
Amerant Bancorp
AMTB
$1.12B
– –
-787
Closed -$19K
AMWD
9108
DELISTED
American Woodmark
AMWD
– –
-688
Closed -$34.2K
AMX icon
9109
PUT
America Movil
AMX
$78.1B
– –
-6,600
Closed -$108K
ANAB icon
9110
AnaptysBio
ANAB
$1.6B
$0 ﹤0.01%
+29
New +$819
AN icon
9111
AutoNation
AN
$6.97B
– –
-11,463
Closed -$1.27M
ANDE icon
9112
Andersons Inc
ANDE
$2.65B
– –
-35
Closed -$1.24K
AORT icon
9113
Artivion
AORT
$1.23B
– –
-2,692
Closed -$32.3K
AORT icon
9114
PUT
Artivion
AORT
$1.23B
– –
-15,500
Closed -$214K
APEI icon
9115
CALL
American Public Education
APEI
$875M
– –
-300
Closed -$2K
APLS
9116
DELISTED
Apellis Pharmaceuticals
APLS
– –
-29,627
Closed -$1.57M
APLT
9117
PUT
DELISTED
Applied Therapeutics
APLT
– –
-3,000
Closed -$2K
APO icon
9118
Apollo Global Management
APO
$70.7B
– –
-17,139
Closed -$1.02M
APOG icon
9119
Apogee Enterprises
APOG
$850M
– –
-425
Closed -$19.2K
APPF icon
9120
AppFolio
APPF
$5.85B
– –
-5,529
Closed -$615K
APPF icon
9121
PUT
AppFolio
APPF
$5.85B
– –
-10,400
Closed -$1.09M
APT icon
9122
Alpha Pro Tech
APT
$50.4M
– –
-27,249
Closed -$111K
ARBE icon
9123
Arbe Robotics
ARBE
$83.1M
$0 ﹤0.01%
239
-690
-74% -$2.98K
ARBK
9124
CALL
Argo Blockchain
ARBK
$45.5M
– –
-39
Closed -$32K
ARKO icon
9125
ARKO Corp
ARKO
$890M
– –
-2,625
Closed -$24.3K
363 364
365
366 367

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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.