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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
TKR icon
10876
Timken Company
TKR
$9.86B
– –
-21
Closed -$1.3K
TLPH icon
10877
Talphera
TLPH
$65.9M
$0 ﹤0.01%
127
+117
+1,170% +$613
TMC icon
10878
TMC The Metals Company
TMC
$1.69B
– –
-19,786
Closed -$19.1K
TMUS icon
10879
T-Mobile US
TMUS
$194B
– –
-7,328
Closed -$1.03M
TMV icon
10880
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$181M
– –
-13,228
Closed -$335K
TOST icon
10881
Toast
TOST
$16.8B
– –
-81,086
Closed -$1.41M
TOWN icon
10882
CALL
Towne Bank
TOWN
$3.25B
– –
-2,500
Closed -$67K
TOWN icon
10883
PUT
Towne Bank
TOWN
$3.25B
– –
-500
Closed -$13K
TPH
10884
DELISTED
Tri Pointe Homes
TPH
– –
-961
Closed -$17K
TPOR icon
10885
Direxion Daily Transportation Bull 3X ETF
TPOR
$20.1M
$0 ﹤0.01%
+22
New +$621
TRAK icon
10886
PUT
ReposiTrak
TRAK
$145M
– –
-5,000
Closed -$22K
TRIN icon
10887
Trinity Capital
TRIN
$1.57B
– –
-25,047
Closed -$369K
TRIP icon
10888
TripAdvisor
TRIP
$1.57B
– –
-5,154
Closed -$115K
TROO icon
10889
CALL
TROOPS Inc
TROO
$255M
– –
-4,000
Closed -$8K
TRST
10890
Trustco Bank Corp NY
TRST
$967M
– –
-64
Closed -$2.12K
TRUE
10891
CALL
DELISTED
TrueCar
TRUE
– –
-54,300
Closed -$140K
TRUE
10892
DELISTED
TrueCar
TRUE
– –
-134,718
Closed -$307K
TRX icon
10893
CALL
TRX Gold Corp
TRX
$271M
– –
-10,600
Closed -$3K
TRX icon
10894
TRX Gold Corp
TRX
$271M
– –
-700
Closed -$307
TSHA icon
10895
Taysha Gene Therapies
TSHA
$1.59B
$0 ﹤0.01%
+347
New +$1.26K
TSLX icon
10896
Sixth Street Specialty
TSLX
$1.58B
– –
-500
Closed -$9.31K
TTE icon
10897
TotalEnergies
TTE
$191B
– –
-1,300
Closed -$68K
TTEC icon
10898
CALL
TTEC Holdings
TTEC
$95.9M
– –
-200
Closed -$13K
TTEC icon
10899
TTEC Holdings
TTEC
$95.9M
– –
-926
Closed -$55.1K
TTNP
10900
DELISTED
Titan Pharmaceuticals
TTNP
– –
-24
Closed -$620
434 435
436
437 438

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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.