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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
OMEX icon
10051
Odyssey Marine Exploration
OMEX
$41.6M
$0 ﹤0.01%
149
-4,363
-97% -$13.6K
OMEX icon
10052
PUT
Odyssey Marine Exploration
OMEX
$41.6M
– –
-5,000
Closed -$15K
ONDS icon
10053
CALL
Ondas Inc
ONDS
$4.5B
– –
-63,700
Closed -$235K
ONEQ icon
10054
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.2B
– –
-3,533
Closed -$151K
ONEQ icon
10055
PUT
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.2B
– –
-7,200
Closed -$298K
ONON icon
10056
On Holding
ONON
$11.8B
– –
-5,476
Closed -$95.8K
ONTF
10057
PUT
DELISTED
ON24
ONTF
– –
-200
Closed -$1K
OOMA icon
10058
CALL
Ooma
OOMA
$545M
– –
-700
Closed -$8K
OPI
10059
DELISTED
Office Properties Income Trust
OPI
– –
-7,469
Closed -$108K
OPRA
10060
PUT
Opera Ltd
OPRA
$1.65B
– –
-6,900
Closed -$29K
OPTT icon
10061
PUT
Ocean Power Technologies
OPTT
$38.3M
– –
-1,800
Closed -$1K
OPY icon
10062
CALL
Oppenheimer Holdings
OPY
$1.18B
– –
-5,300
Closed -$164K
OPY icon
10063
PUT
Oppenheimer Holdings
OPY
$1.18B
– –
-8,200
Closed -$254K
OR icon
10064
OR Royalties Inc
OR
$5.49B
– –
-12,818
Closed -$148K
ORGO icon
10065
CALL
Organogenesis Holdings
ORGO
$305M
– –
-900
Closed -$2K
ORLA
10066
PUT
Orla Mining
ORLA
$3.52B
– –
-1,000
Closed -$3K
OSK icon
10067
Oshkosh
OSK
$9.67B
– –
-2,781
Closed -$239K
OSPN icon
10068
PUT
OneSpan
OSPN
$555M
– –
-300
Closed -$2K
OSIS icon
10069
OSI Systems
OSIS
$3.56B
– –
-705
Closed -$57.4K
OSUR icon
10070
OraSure Technologies
OSUR
$281M
– –
-11,520
Closed -$52.8K
OTRK
10071
DELISTED
Ontrak
OTRK
$0 ﹤0.01%
3
-222
-99% -$8.06K
OTTR icon
10072
Otter Tail
OTTR
$3.88B
– –
-4
Closed -$240
OUT icon
10073
Outfront Media
OUT
$5.64B
– –
-1,813
Closed -$30.6K
OWLT icon
10074
Owlet
OWLT
$153M
$0 ﹤0.01%
+108
New +$1.34K
OXM icon
10075
CALL
Oxford Industries
OXM
$574M
– –
-200
Closed -$17K
401 402
403
404 405

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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.