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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
SOGP
9626
PUT
Sound Group
SOGP
$45.9M
$1K ﹤0.01%
220
-110
-33% -$1.15K
SPLB icon
9627
State Street SPDR Portfolio Long Term Corporate Bond ETF
SPLB
$1.18B
$1K ﹤0.01%
76
-124
-62% -$2.98K
SPNT icon
9628
PUT
SiriusPoint
SPNT
$2.98B
$1K ﹤0.01%
+300
New +$1.39K
SRI icon
9629
PUT
Stoneridge
SRI
$209M
$1K ﹤0.01%
100
– –
SRRK icon
9630
PUT
Scholar Rock
SRRK
$5.71B
$1K ﹤0.01%
200
-20,100
-99% -$167K
STKH
9631
CALL
Steakholder Foods
STKH
$750K
$1K ﹤0.01%
+2
New +$2.53K
SWIM icon
9632
Latham Group
SWIM
$646M
$1K ﹤0.01%
378
-7,437
-95% -$42.4K
SYBX
9633
PUT
DELISTED
Synlogic
SYBX
$1K ﹤0.01%
73
+6
+9% +$92
T icon
9634
AT&T
T
$165B
$1K ﹤0.01%
100
– –
TAC icon
9635
CALL
TransAlta
TAC
$4.34B
$1K ﹤0.01%
200
-2,400
-92% -$24.7K
TGI
9636
PUT
DELISTED
Triumph Group
TGI
$1K ﹤0.01%
200
-40,800
-100% -$533K
THD icon
9637
iShares MSCI Thailand ETF
THD
$361M
$1K ﹤0.01%
18
-100
-85% -$6.87K
TIL icon
9638
PUT
Instil Bio
TIL
$48.4M
$1K ﹤0.01%
+20
New +$2.29K
TMQ
9639
CALL
Trilogy Metals
TMQ
$522M
$1K ﹤0.01%
2,100
– –
TROO icon
9640
TROOPS Inc
TROO
$239M
$1K ﹤0.01%
1,665
-4,746
-74% -$9.64K
TRTX
9641
TPG RE Finance Trust
TRTX
$666M
$1K ﹤0.01%
+273
New +$2.6K
TSE
9642
DELISTED
Trinseo
TSE
$1K ﹤0.01%
100
-10,399
-99% -$325K
TSLS icon
9643
Direxion Daily TSLA Bear 1X ETF
TSLS
$87M
$1K ﹤0.01%
+6
New +$1.49K
TSVT
9644
PUT
DELISTED
2seventy bio
TSVT
$1K ﹤0.01%
+100
New +$1.48K
TURN
9645
PUT
DELISTED
180 Degree Capital
TURN
$1K ﹤0.01%
+300
New +$1.8K
UBX
9646
PUT
DELISTED
Unity Biotechnology
UBX
$1K ﹤0.01%
420
-510
-55% -$3.22K
UIS icon
9647
CALL
Unisys
UIS
$227M
$1K ﹤0.01%
200
-4,400
-96% -$47K
URGN icon
9648
PUT
UroGen Pharma
URGN
$2B
$1K ﹤0.01%
200
– –
USIO icon
9649
PUT
Usio Inc
USIO
$53.3M
$1K ﹤0.01%
900
– –
USNA icon
9650
Usana Health Sciences
USNA
$394M
$1K ﹤0.01%
+24
New +$1.59K
384 385
386
387 388

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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.