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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
NX icon
10026
CALL
Quanex
NX
$855M
– –
-200
Closed -$3K
NXPI icon
10027
NXP Semiconductors
NXPI
$68.1B
– –
-5,875
Closed -$932K
NXRT
10028
CALL
NexPoint Residential Trust
NXRT
$665M
– –
-100
Closed -$4K
NXST icon
10029
Nexstar Media Group
NXST
$5.61B
– –
-1,509
Closed -$265K
NXST icon
10030
PUT
Nexstar Media Group
NXST
$5.61B
– –
-5,300
Closed -$884K
NXTC icon
10031
PUT
NextCure
NXTC
$17.3M
– –
-267
Closed -$8K
NYC
10032
CALL
American Strategic Investment Co
NYC
$23.9M
– –
-113
Closed -$2K
TEAD
10033
CALL
Teads Holding Co
TEAD
$75.9M
– –
-3,800
Closed -$13K
TWAV
10034
TaoWeave Inc
TWAV
$4.22M
$0 ﹤0.01%
3
+2
+200% +$253
OCFT
10035
DELISTED
OneConnect Financial Technology
OCFT
$0 ﹤0.01%
42
-151
-78% -$1.04K
IMDX
10036
CALL
Insight Molecular Diagnostics
IMDX
$155M
– –
-2,330
Closed -$34K
IMDX
10037
Insight Molecular Diagnostics
IMDX
$155M
$0 ﹤0.01%
+1
New +$11
OEC icon
10038
Orion
OEC
$401M
– –
-71,588
Closed -$1.2M
OESX icon
10039
Orion Energy Systems
OESX
$41.1M
– –
-909
Closed -$16.9K
OESX icon
10040
PUT
Orion Energy Systems
OESX
$41.1M
– –
-1,090
Closed -$17K
OFG icon
10041
OFG Bancorp
OFG
$2.21B
– –
-321
Closed -$8K
OFIX icon
10042
Orthofix Medical
OFIX
$457M
– –
-300
Closed -$5.29K
OFS icon
10043
OFS Capital
OFS
$44.5M
– –
-2,829
Closed -$27.7K
OGI
10044
Organigram Holdings
OGI
$132M
$0 ﹤0.01%
229
-4,368
-95% -$16.4K
OGN icon
10045
Organon & Co
OGN
$3.55B
– –
-10,302
Closed -$263K
OHI icon
10046
Omega Healthcare
OHI
$15.4B
– –
-24,954
Closed -$753K
OGS icon
10047
PUT
ONE Gas
OGS
$5.04B
– –
-200
Closed -$14K
OII icon
10048
Oceaneering
OII
$5.24B
– –
-10,665
Closed -$142K
OLMA icon
10049
Olema Pharmaceuticals
OLMA
$1.02B
– –
-204
Closed -$595
OLN icon
10050
Olin
OLN
$2.68B
– –
-6,514
Closed -$346K
400 401
402
403 404

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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.