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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
BZ icon
9251
Kanzhun
BZ
$6.89B
– –
-42,431
Closed -$696K
BZFD icon
9252
PUT
BuzzFeed
BZFD
$92.4M
– –
-1,275
Closed -$7K
BZH icon
9253
Beazer Homes USA
BZH
$907M
– –
-10,165
Closed -$123K
CABA icon
9254
Cabaletta Bio
CABA
$439M
– –
-24,310
Closed -$88.5K
CADE
9255
PUT
DELISTED
Cadence Bank
CADE
– –
-1,000
Closed -$25K
CAF
9256
Morgan Stanley China A Share Fund
CAF
$334M
$0 ﹤0.01%
62
-200
-76% -$2.69K
CALC icon
9257
CalciMedica
CALC
$12M
$0 ﹤0.01%
1
-68
-99% -$763
CAPL icon
9258
CrossAmerica Partners
CAPL
$830M
– –
-1,335
Closed -$26.4K
CARS icon
9259
Cars.com
CARS
$641M
– –
-5,905
Closed -$80K
CAT icon
9260
Caterpillar
CAT
$409B
– –
-32,345
Closed -$7.04M
CBL
9261
CBL Properties
CBL
$1.78B
– –
-272
Closed -$6K
CBSH icon
9262
CALL
Commerce Bancshares
CBSH
$8.5B
– –
-243
Closed -$13K
CBT icon
9263
Cabot Corp
CBT
$4.65B
– –
-3,832
Closed -$268K
CCCC icon
9264
C4 Therapeutics
CCCC
$376M
$0 ﹤0.01%
44
-2,145
-98% -$17.8K
CCCC icon
9265
PUT
C4 Therapeutics
CCCC
$376M
– –
-4,200
Closed -$36K
CCEP icon
9266
Coca-Cola Europacific Partners
CCEP
$46.5B
– –
-2,295
Closed -$115K
CCI icon
9267
Crown Castle
CCI
$32.7B
– –
-14,348
Closed -$1.94M
CCJ icon
9268
Cameco
CCJ
$38.3B
– –
-579,462
Closed -$13.6M
CCK icon
9269
Crown Holdings
CCK
$12.8B
– –
-39,455
Closed -$3.14M
CCO icon
9270
PUT
Clear Channel Outdoor Holdings
CCO
$1.23B
– –
-9,600
Closed -$13K
CCS icon
9271
Century Communities
CCS
$2B
– –
-3,319
Closed -$157K
CCSI icon
9272
Consensus Cloud Solutions
CCSI
$669M
– –
-4,928
Closed -$269K
CDLX icon
9273
Cardlytics
CDLX
$21M
– –
-583
Closed -$36K
CDW icon
9274
CDW
CDW
$17.1B
– –
-1,589
Closed -$279K
CDXS icon
9275
Codexis
CDXS
$135M
$0 ﹤0.01%
81
-2,212
-96% -$12.1K
369 370
371
372 373

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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.