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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+22.5%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$104B
AUM Growth
+$47.9B
Cap. Flow
+$109M
Cap. Flow %
0.11%
Top 10 Hldgs %
39.88%
Holding
11,184
New
2,248
Increased
6,668
Reduced
1,000
Closed
1,196

Top Buys

Rank Stock Value
1
AMC icon
AMC Entertainment Holdings
AMC
+$39.3M
2
T icon
AT&T
T
+$29.8M
3
NVDA icon
NVIDIA
NVDA
+$28.3M
4
MU icon
Micron Technology
MU
+$22.9M
5
BIDU icon
Baidu
BIDU
+$22.3M

Top Sells

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$36.1M
2
TSLA icon
Tesla
TSLA
+$35.2M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.9M
4
PLTR icon
Palantir
PLTR
+$25.7M
5
WFC icon
Wells Fargo
WFC
+$20.4M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.7%
2 Technology 0.48%
3 Consumer Discretionary 0.39%
4 Communication Services 0.28%
5 Healthcare 0.27%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
HIMS icon
10276
Hims & Hers Health
HIMS
$6.47B
– –
-11,019
Closed -$131K
HLI icon
10277
CALL
Houlihan Lokey
HLI
$9.58B
– –
-20
Closed -$133K
HLMN icon
10278
Hillman Solutions
HLMN
$1.49B
– –
-501
Closed -$5.58K
HLMN icon
10279
PUT
Hillman Solutions
HLMN
$1.49B
– –
-20
Closed -$20K
HMC icon
10280
Honda
HMC
$42.4B
– –
-5,239
Closed -$163K
HNDL icon
10281
Strategy Shares Nasdaq 7HANDL Index ETF
HNDL
$636M
$0 ﹤0.01%
+11
New +$278
HNI icon
10282
HNI Corp
HNI
$3.58B
– –
-94
Closed -$4.07K
HOMB icon
10283
PUT
Home BancShares
HOMB
$6.03B
– –
-1
Closed -$2K
HONE
10284
DELISTED
HarborOne Bancorp
HONE
$0 ﹤0.01%
+11
New +$159
HOPE icon
10285
CALL
Hope Bancorp
HOPE
$1.8B
– –
-1
Closed -$1K
HOUS
10286
DELISTED
Anywhere Real Estate
HOUS
– –
-14,094
Closed -$241K
HPP
10287
Hudson Pacific Properties
HPP
$684M
– –
-882
Closed -$174K
HQY icon
10288
HealthEquity
HQY
$7.95B
– –
-5,585
Closed -$425K
HRTX icon
10289
Heron Therapeutics
HRTX
$65.3M
– –
-64,103
Closed -$1.02M
HRZN icon
10290
Horizon Technology Finance
HRZN
$324M
– –
-3,054
Closed -$50.4K
HSY icon
10291
Hershey
HSY
$34.8B
– –
-10,711
Closed -$1.8M
HTBK
10292
CALL
DELISTED
Heritage Commerce
HTBK
– –
-121
Closed -$147K
HUBB icon
10293
CALL
Hubbell
HUBB
$24.3B
– –
-15
Closed -$280K
HUM icon
10294
Humana
HUM
$48.2B
– –
-2,590
Closed -$1.13M
HUN icon
10295
Huntsman Corp
HUN
$1.69B
– –
-65,857
Closed -$1.87M
HVT icon
10296
Haverty Furniture Companies
HVT
$445M
– –
-5,351
Closed -$234K
HWC icon
10297
Hancock Whitney
HWC
$6.08B
– –
-6,864
Closed -$319K
HWKN icon
10298
Hawkins
HWKN
$2.7B
$0 ﹤0.01%
30
-127
-81% -$4.21K
HY icon
10299
CALL
Hyster-Yale Materials Handling
HY
$641M
– –
-350
Closed -$3.05M
HY icon
10300
Hyster-Yale Materials Handling
HY
$641M
– –
-6,762
Closed -$589K
410 411
412
413 414

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Simplex Trading's Q2 2021 Portfolio in Review

As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.

Simplex Trading's Q2 2021 filing shows 2,248 new, 6,668 increased, 1,000 reduced and 1,196 closed positions. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M. The largest sale was Invesco QQQ Trust, an estimated $36.1M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
  • Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
  • Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
  • Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
  • Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
  • Simplex Trading opened 2,248 new positions and closed 1,196 in Q2 2021.
  • Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.

Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.