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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
BDRY icon
9876
CALL
Breakwave Dry Bulk Shipping ETF
BDRY
$28.9M
– –
-400
Closed -$6K
BDSX icon
9877
Biodesix
BDSX
$228M
$0 ﹤0.01%
+13
New +$501
BEAM icon
9878
Beam Therapeutics
BEAM
$2.58B
– –
-5,916
Closed -$337K
BEDZ icon
9879
AdvisorShares Hotel ETF
BEDZ
$2.95M
– –
-200
Closed -$3K
BF.B icon
9880
CALL
Brown-Forman Class B
BF.B
$12B
– –
-3,300
Closed -$229K
BF.A icon
9881
Brown-Forman Class A
BF.A
$12.3B
– –
-1,659
Closed -$112K
BFLY icon
9882
Butterfly Network
BFLY
$1.72B
– –
-34,846
Closed -$184K
BFRI icon
9883
Biofrontera
BFRI
$14M
– –
-14
Closed -$383
BGSF icon
9884
PUT
BGSF Inc
BGSF
$59.1M
– –
-2,000
Closed -$24K
BIIB icon
9885
Biogen
BIIB
$29.9B
– –
-3,774
Closed -$802K
BITI icon
9886
ProShares Short Bitcoin Strategy ETF
BITI
$118M
– –
-2
Closed –
BITO icon
9887
ProShares Bitcoin Strategy ETF
BITO
$1.4B
$0 ﹤0.01%
30
-438,135
-100% -$5.75M
BKCH icon
9888
Global X Blockchain ETF
BKCH
$219M
– –
-25
Closed –
BKH icon
9889
Black Hills Corp
BKH
$5.73B
– –
-330
Closed -$24.7K
BKNG icon
9890
Booking.com
BKNG
$138B
– –
-63,900
Closed -$4.8M
BKU icon
9891
PUT
Bankunited
BKU
$3.38B
– –
-300
Closed -$10K
BKYI
9892
BIO-key International
BKYI
$4.94M
– –
-123
Closed -$38.4K
BKYI
9893
PUT
BIO-key International
BKYI
$4.94M
– –
-142
Closed -$45K
BLBD icon
9894
CALL
Blue Bird Corp
BLBD
$2.41B
– –
-7,500
Closed -$69K
BLFS icon
9895
BioLife Solutions
BLFS
$1.46B
– –
-567
Closed -$12.1K
BLKB icon
9896
Blackbaud
BLKB
$1.5B
– –
-2,418
Closed -$130K
BLRX
9897
BioLineRX
BLRX
$12.3M
$0 ﹤0.01%
5
-38
-88% -$2.17K
BLV icon
9898
Vanguard Long-Term Bond ETF
BLV
$5.75B
$0 ﹤0.01%
+3
New +$237
BMEA icon
9899
CALL
Biomea Fusion
BMEA
$90.4M
– –
-5,400
Closed -$64K
BNDX icon
9900
Vanguard Total International Bond ETF
BNDX
$82B
– –
-3,986
Closed -$198K
394 395
396
397 398

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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.