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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
INSW icon
10351
PUT
International Seaways
INSW
$4.57B
– –
-400
Closed -$8K
INVA icon
10352
PUT
Innoviva
INVA
$1.58B
– –
-300
Closed -$4K
INVH icon
10353
Invitation Homes
INVH
$17.6B
– –
-1,903
Closed -$70.5K
IONS icon
10354
Ionis Pharmaceuticals
IONS
$9.33B
– –
-34,626
Closed -$1.46M
IPAY icon
10355
Amplify Mobile Payments ETF
IPAY
$154M
– –
-23
Closed –
IPO icon
10356
Renaissance IPO ETF
IPO
$155M
– –
-1,019
Closed -$30K
IREN icon
10357
Iris Energy
IREN
$13.4B
$0 ﹤0.01%
178
-2,991
-94% -$12.9K
IRTC icon
10358
iRhythm Holdings
IRTC
$3.59B
– –
-12,438
Closed -$1.8M
IRWD icon
10359
Ironwood Pharmaceuticals
IRWD
$621M
– –
-6,079
Closed -$68.9K
ISPO
10360
PUT
DELISTED
Inspirato
ISPO
– –
-300
Closed -$27K
ISSC icon
10361
Innovative Solutions & Support
ISSC
$340M
– –
-3,748
Closed -$27.2K
ISSC icon
10362
PUT
Innovative Solutions & Support
ISSC
$340M
– –
-1,000
Closed -$7K
ITA icon
10363
iShares US Aerospace & Defense ETF
ITA
$14.2B
– –
-824
Closed -$81K
ITB icon
10364
iShares US Home Construction ETF
ITB
$2.4B
– –
-22,661
Closed -$1.19M
ITGR icon
10365
Integer Holdings
ITGR
$3.35B
– –
-2,674
Closed -$180K
ITOS
10366
PUT
DELISTED
iTeos Therapeutics
ITOS
– –
-15,700
Closed -$323K
ITRN icon
10367
CALL
Ituran Location and Control
ITRN
$1.09B
– –
-200
Closed -$4K
IVR icon
10368
Invesco Mortgage Capital
IVR
$777M
$0 ﹤0.01%
10
-100
-91% -$1.55K
IVV icon
10369
iShares Core S&P 500 ETF
IVV
$874B
– –
-90,501
Closed -$34.3M
IYE icon
10370
iShares US Energy ETF
IYE
$1.75B
– –
-402
Closed -$15K
IYW icon
10371
iShares US Technology ETF
IYW
$23.7B
– –
-766
Closed -$61K
JAGX icon
10372
Jaguar Health
JAGX
$4.9M
– –
0
– –
JBGS
10373
PUT
JBG SMITH
JBGS
$849M
– –
-600
Closed -$14K
JBL icon
10374
Jabil
JBL
$32.6B
– –
-1,790
Closed -$104K
JELD icon
10375
JELD-WEN Holding
JELD
$93M
– –
-20,953
Closed -$275K
413 414
415
416 417

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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.