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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
-4.86%
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
$88.5B
AUM Growth
-$5.62B
Cap. Flow
-$2.04B
Cap. Flow %
-2.3%
Top 10 Hldgs %
38.07%
Holding
11,570
New
1,564
Increased
4,281
Reduced
3,851
Closed
1,575

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$114M
2
NVDA icon
NVIDIA
NVDA
+$85.9M
3
C icon
Citigroup
C
+$61.5M
4
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$45.5M
5
PFE icon
Pfizer
PFE
+$41.6M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$467M
2
VOO icon
Vanguard S&P 500 ETF
VOO
+$71.2M
3
META icon
Meta Platforms (Facebook)
META
+$47.6M
4
INTC icon
Intel
INTC
+$41.9M
5
TSM icon
TSMC
TSM
+$35.9M

Sector Composition

Rank Sector Weight
1 Technology 0.51%
2 Financials 0.35%
3 Consumer Discretionary 0.3%
4 Healthcare 0.25%
5 Industrials 0.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BYFC icon
9926
CALL
Broadway Financial
BYFC
$94.9M
– –
-6,875
Closed -$58K
BYSI icon
9927
BeyondSpring
BYSI
$46.1M
– –
-478
Closed -$679
BZFD icon
9928
CALL
BuzzFeed
BZFD
$92.4M
– –
-28,200
Closed -$173K
BZQ icon
9929
ProShares UltraShort MSCI Brazil Capped
BZQ
$2.46M
– –
-305
Closed -$36K
BZUN
9930
Baozun
BZUN
$144M
– –
-36,947
Closed -$317K
CAAP icon
9931
PUT
Corporacion America
CAAP
$4.11B
– –
-200
Closed -$1K
CACI icon
9932
CALL
CACI
CACI
$10.8B
– –
-5,600
Closed -$1.58M
CACI icon
9933
PUT
CACI
CACI
$10.8B
– –
-200
Closed -$56K
CAE icon
9934
CAE Inc. Common Shares
CAE
$8.1B
– –
-8,096
Closed -$173K
CAE icon
9935
PUT
CAE Inc. Common Shares
CAE
$8.1B
– –
-3,100
Closed -$76K
CALC icon
9936
CalciMedica
CALC
$12M
$0 ﹤0.01%
69
+54
+360% +$764
CALC icon
9937
PUT
CalciMedica
CALC
$12M
– –
-150
Closed -$2K
CALX icon
9938
Calix
CALX
$2.27B
– –
-2,086
Closed -$112K
CARE icon
9939
Carter Bankshares
CARE
$756M
– –
-106
Closed -$1K
CARG icon
9940
CarGurus
CARG
$3.01B
– –
-6,596
Closed -$134K
CASH icon
9941
CALL
Pathward Financial
CASH
$1.81B
– –
-1,600
Closed -$61K
CASY icon
9942
Casey's General Stores
CASY
$31.9B
– –
-834
Closed -$173K
CBRL icon
9943
Cracker Barrel
CBRL
$1.2B
– –
-1,208
Closed -$121K
CBZ icon
9944
CBIZ
CBZ
$2.29B
– –
-232
Closed -$10.1K
CCAP icon
9945
Crescent Capital BDC
CCAP
$399M
– –
-1,116
Closed -$18.8K
CCAP icon
9946
PUT
Crescent Capital BDC
CCAP
$399M
– –
-3,200
Closed -$49K
CCLD icon
9947
PUT
CareCloud
CCLD
$94.3M
– –
-900
Closed -$3K
CCO icon
9948
Clear Channel Outdoor Holdings
CCO
$1.23B
– –
-7,195
Closed -$10.9K
CDP icon
9949
PUT
COPT Defense Properties
CDP
$4.31B
– –
-1,800
Closed -$47K
CDRE icon
9950
Cadre Holdings
CDRE
$1.32B
– –
-764
Closed -$18.7K
396 397
398
399 400

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Simplex Trading's Q3 2022 Portfolio in Review

As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.

By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.

  • Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
  • Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
  • Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
  • Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
  • Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
  • Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
  • Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.

Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.