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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
GHI icon
9526
PUT
Greystone Housing Impact Investors LP
GHI
$121M
$1K ﹤0.01%
103
-520
-83% -$9.53K
CBIO
9527
Crescent Biopharma
CBIO
$602M
$1K ﹤0.01%
+22
New +$1.58K
GNR icon
9528
State Street SPDR S&P Global Natural Resources ETF
GNR
$4.75B
$1K ﹤0.01%
35
-228
-87% -$12K
GNSS icon
9529
Genasys
GNSS
$75.6M
$1K ﹤0.01%
597
-4,768
-89% -$14.9K
GNSS icon
9530
PUT
Genasys
GNSS
$75.6M
$1K ﹤0.01%
+500
New +$1.56K
GSIT icon
9531
GSI Technology
GSIT
$216M
$1K ﹤0.01%
438
+355
+428% +$1.23K
GTBP icon
9532
GT Biopharma
GTBP
$11.7M
$1K ﹤0.01%
33
-31
-48% -$2.37K
HOFT icon
9533
PUT
Hooker Furnishings Corp
HOFT
$148M
$1K ﹤0.01%
100
-2,300
-96% -$36.4K
HOFV
9534
PUT
DELISTED
Hall of Fame Resort & Entertainment Co
HOFV
$1K ﹤0.01%
+109
New +$1.9K
HRTG icon
9535
PUT
Heritage Insurance Holdings
HRTG
$842M
$1K ﹤0.01%
+500
New +$1.34K
ICAD
9536
PUT
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
+500
New +$1.64K
IDYA icon
9537
PUT
IDEAYA Biosciences
IDYA
$3.41B
$1K ﹤0.01%
100
– –
IMNM icon
9538
CALL
Immunome
IMNM
$2.52B
$1K ﹤0.01%
+300
New +$1.41K
INTA icon
9539
Intapp
INTA
$2.12B
$1K ﹤0.01%
+96
New +$1.51K
INVE icon
9540
Identive
INVE
$64.6M
$1K ﹤0.01%
+155
New +$2.12K
IRIX icon
9541
PUT
IRIDEX
IRIX
$15.5M
$1K ﹤0.01%
+600
New +$1.64K
ISRA icon
9542
VanEck Israel ETF
ISRA
$152M
$1K ﹤0.01%
+33
New +$1.33K
ITOS
9543
DELISTED
iTeos Therapeutics
ITOS
$1K ﹤0.01%
72
-11,133
-99% -$256K
IUSG icon
9544
iShares Core S&P US Growth ETF
IUSG
$31.1B
$1K ﹤0.01%
23
– –
JBGS
9545
JBG SMITH
JBGS
$846M
$1K ﹤0.01%
+88
New +$2.02K
KOPN icon
9546
PUT
Kopin
KOPN
$663M
$1K ﹤0.01%
1,500
-12,000
-89% -$16.8K
KRG icon
9547
PUT
Kite Realty
KRG
$5.95B
$1K ﹤0.01%
+100
New +$1.92K
KURE icon
9548
KraneShares MSCI All China Health Care Index ETF
KURE
$89.5M
$1K ﹤0.01%
100
– –
LASR icon
9549
nLIGHT
LASR
$3.95B
$1K ﹤0.01%
191
-13,037
-99% -$150K
LEGH icon
9550
CALL
Legacy Housing
LEGH
$630M
$1K ﹤0.01%
+100
New +$1.59K
380 381
382
383 384

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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.