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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
INSE icon
9726
CALL
Inspired Entertainment
INSE
$177M
– –
-49,600
Closed -$437K
INSG icon
9727
PUT
Inseego
INSG
$108M
– –
-750
Closed -$15K
INVA icon
9728
Innoviva
INVA
$1.58B
– –
-484
Closed -$6.36K
INVE icon
9729
CALL
Identive
INVE
$64.6M
– –
-1,200
Closed -$15K
INVE icon
9730
Identive
INVE
$64.6M
$0 ﹤0.01%
55
-100
-65% -$969
INVE icon
9731
PUT
Identive
INVE
$64.6M
– –
-300
Closed -$3K
INZY
9732
DELISTED
Inozyme Pharma
INZY
$0 ﹤0.01%
+137
New +$239
IOVA icon
9733
Iovance Biotherapeutics
IOVA
$2.23B
– –
-345
Closed -$2.69K
IP icon
9734
International Paper
IP
$22.3B
– –
-37,139
Closed -$1.28M
IQ icon
9735
iQIYI
IQ
$1.18B
– –
-255,590
Closed -$745K
IREN icon
9736
CALL
Iris Energy
IREN
$13.2B
– –
-5,100
Closed -$21K
IRON icon
9737
CALL
Disc Medicine
IRON
$2.83B
– –
-150
Closed -$7K
IRON icon
9738
Disc Medicine
IRON
$2.83B
– –
-417
Closed -$20K
IRON icon
9739
PUT
Disc Medicine
IRON
$2.83B
– –
-1,217
Closed -$59K
IRT icon
9740
Independence Realty Trust
IRT
$3.92B
– –
-18,457
Closed -$312K
IRT icon
9741
PUT
Independence Realty Trust
IRT
$3.92B
– –
-19,600
Closed -$327K
ISPO
9742
DELISTED
Inspirato
ISPO
– –
-834
Closed -$31.6K
ISRA icon
9743
VanEck Israel ETF
ISRA
$152M
$0 ﹤0.01%
21
-12
-36% -$447
ISSC icon
9744
CALL
Innovative Solutions & Support
ISSC
$342M
– –
-400
Closed -$3K
ITEQ icon
9745
Amplify BlueStar Israel Technology ETF
ITEQ
$114M
$0 ﹤0.01%
13
-890
-99% -$39.6K
ITGR icon
9746
PUT
Integer Holdings
ITGR
$3.35B
– –
-200
Closed -$12K
ITOS
9747
CALL
DELISTED
iTeos Therapeutics
ITOS
– –
-500
Closed -$9K
ITP icon
9748
CALL
IT Tech Packaging
ITP
$2.92M
– –
-94,300
Closed -$73K
ITW icon
9749
Illinois Tool Works
ITW
$81.4B
– –
-480
Closed -$102K
IVT icon
9750
InvenTrust Properties
IVT
$2.84B
– –
-490
Closed -$11.7K
388 389
390
391 392

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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.