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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
CDXS icon
9276
PUT
Codexis
CDXS
$135M
– –
-3,100
Closed -$18K
CDZI icon
9277
CALL
Cadiz
CDZI
$266M
– –
-3,700
Closed -$7K
CE icon
9278
Celanese
CE
$5.09B
– –
-4,668
Closed -$463K
CEG icon
9279
Constellation Energy
CEG
$98B
– –
-8,760
Closed -$788K
CERT icon
9280
Certara
CERT
$1.17B
$0 ﹤0.01%
+14
New +$203
CERT icon
9281
PUT
Certara
CERT
$1.17B
– –
-100
Closed -$1K
CFG icon
9282
Citizens Financial Group
CFG
$30.4B
– –
-18,225
Closed -$712K
CGEM icon
9283
CALL
Cullinan Oncology
CGEM
$1.05B
– –
-600
Closed -$7K
CGEM icon
9284
PUT
Cullinan Oncology
CGEM
$1.05B
– –
-200
Closed -$2K
CGEN icon
9285
CALL
Compugen
CGEN
$216M
– –
-8,800
Closed -$5K
CGEN icon
9286
PUT
Compugen
CGEN
$216M
– –
-8,300
Closed -$5K
CGNX icon
9287
Cognex
CGNX
$10.3B
– –
-289
Closed -$13.5K
CGW icon
9288
Invesco S&P Global Water Index ETF
CGW
$1.05B
– –
-409
Closed -$16K
CHCO icon
9289
City Holding Co
CHCO
$1.97B
$0 ﹤0.01%
+2
New +$193
CHH icon
9290
CALL
Choice Hotels
CHH
$5.03B
– –
-5,000
Closed -$547K
CHMI
9291
Cherry Hill Mortgage Investment Corp
CHMI
$83M
– –
-2,122
Closed -$11.9K
CHRS icon
9292
CALL
Coherus Oncology
CHRS
$217M
– –
-400
Closed -$3K
CHT icon
9293
PUT
Chunghwa Telecom
CHT
$33.2B
– –
-100
Closed -$3K
CIEN icon
9294
Ciena
CIEN
$55.3B
– –
-27,899
Closed -$1.26M
CIFR icon
9295
CALL
Cipher Digital
CIFR
$9.47B
– –
-2,600
Closed -$3K
CIFR icon
9296
PUT
Cipher Digital
CIFR
$9.47B
– –
-800
Closed -$1K
CINF icon
9297
Cincinnati Financial
CINF
$28.3B
– –
-7,486
Closed -$771K
CIVB icon
9298
CALL
Civista Bancshares
CIVB
$594M
– –
-700
Closed -$14K
CLBK icon
9299
Columbia Financial
CLBK
$1.13B
– –
-700
Closed -$14K
CLDT
9300
Chatham Lodging
CLDT
$630M
– –
-534
Closed -$6.59K
370 371
372
373 374

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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.