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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
CSTE icon
9351
CALL
Caesarstone
CSTE
$72.3M
– –
-1,700
Closed -$15K
CSTE icon
9352
Caesarstone
CSTE
$72.3M
– –
-58,237
Closed -$435K
CSTL icon
9353
Castle Biosciences
CSTL
$749M
– –
-8,968
Closed -$208K
CTBI icon
9354
CALL
Community Trust Bancorp
CTBI
$1.38B
– –
-1,100
Closed -$44K
CTBI icon
9355
Community Trust Bancorp
CTBI
$1.38B
– –
-182
Closed -$7K
CTBI icon
9356
PUT
Community Trust Bancorp
CTBI
$1.38B
– –
-500
Closed -$20K
CTLP
9357
PUT
DELISTED
Cantaloupe
CTLP
– –
-900
Closed -$3K
CTOS icon
9358
Custom Truck One Source
CTOS
$2.47B
– –
-433
Closed -$2.81K
CTRN icon
9359
Citi Trends
CTRN
$524M
– –
-5,486
Closed -$129K
CTS icon
9360
CALL
CTS Corp
CTS
$1.72B
– –
-100
Closed -$4K
CTS icon
9361
CTS Corp
CTS
$1.72B
– –
-42
Closed -$1K
CTSO icon
9362
PUT
Cytosorbents Corp
CTSO
$22.6M
– –
-1,300
Closed -$1K
CTVA icon
9363
Corteva
CTVA
$59.7B
– –
-21,135
Closed -$1.34M
CUE icon
9364
Cue Biopharma
CUE
$135M
– –
-547
Closed -$50K
CURI icon
9365
PUT
CuriosityStream
CURI
$139M
– –
-1,200
Closed -$1K
CUZ icon
9366
Cousins Properties
CUZ
$5.29B
– –
-129
Closed -$3.15K
CUZ icon
9367
PUT
Cousins Properties
CUZ
$5.29B
– –
-200
Closed -$4K
CVEO icon
9368
CALL
Civeo
CVEO
$379M
– –
-200
Closed -$5K
CVLT icon
9369
CALL
Commault Systems
CVLT
$5.89B
– –
-100
Closed -$5K
CVLT icon
9370
Commault Systems
CVLT
$5.89B
– –
-1,513
Closed -$93.8K
CVRX icon
9371
CALL
CVRx
CVRX
$126M
– –
-300
Closed -$2K
CVX icon
9372
Chevron
CVX
$388B
– –
-98,045
Closed -$17.1M
CW icon
9373
Curtiss-Wright
CW
$27.7B
– –
-150
Closed -$25K
CW icon
9374
PUT
Curtiss-Wright
CW
$27.7B
– –
-1,200
Closed -$166K
CWB icon
9375
State Street SPDR Bloomberg Convertible Securities ETF
CWB
$5.64B
– –
-8,296
Closed -$525K
373 374
375
376 377

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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.