Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
7976
CALL
AvePoint
AVPT
$3.4B
| $6.73K | ﹤0.01% |
600
-800
| -57% | -$8.23K |
2021 Q4
18 quarters
|
|
7977
PUT
Cresud
CRESY
$773M
| $6.73K | ﹤0.01% |
600
-12,700
| -95% | -$146K |
2021 Q1
21 quarters
|
|
7978
CALL
Paysafe
PSFE
$310M
| $6.72K | ﹤0.01% |
900
+500
| +125% | +$3.91K |
2021 Q2
20 quarters
|
|
7979
VanEck Merk Gold Trust
OUNZ
$2.6B
| $6.71K | ﹤0.01% |
174
-963
| -85% | -$41.8K |
2026 Q1
1 quarter
|
|
7980
CALL
Community Bank
CBU
$3.28B
| $6.71K | ﹤0.01% |
100
| – | – |
2026 Q1
1 quarter
|
|
7981
Core & Main
CNM
$7.81B
| $6.71K | ﹤0.01% |
139
-8,977
| -98% | -$444K |
2026 Q1
1 quarter
|
|
7982
PUT
Center Bancorp
CNOB
$1.65B
| $6.69K | ﹤0.01% |
+200
| New | +$6K |
2026 Q2
0 quarters
|
|
7983
PUT
XBiotech
XBIT
$60.1M
| $6.67K | ﹤0.01% |
2,900
| – | – |
2025 Q2
4 quarters
|
|
7984
PUT
Sutro Biopharma
STRO
$171M
| $6.64K | ﹤0.01% |
200
-27,700
| -99% | -$864K |
2025 Q4
2 quarters
|
|
7985
Janus Henderson B-BBB CLO ETF
JBBB
$1.51B
| $6.63K | ﹤0.01% |
140
-5,555
| -98% | -$263K |
2025 Q3
3 quarters
|
|
7986
Flotek Industries
FTK
$840M
| $6.56K | ﹤0.01% |
279
-645
| -70% | -$12.5K |
2025 Q1
5 quarters
|
|
7987
Stem
STEM
$29.1M
| $6.56K | ﹤0.01% |
+840
| New | +$7.79K |
2026 Q2
0 quarters
|
|
7988
CALL
Robinhood Ventures Fund I
RVI
$650M
| $6.56K | ﹤0.01% |
+200
| New | +$7.62K |
2026 Q2
0 quarters
|
|
7989
CALL
Moelis & Co
MC
$4.08B
| $6.54K | ﹤0.01% |
100
| – | – |
2019 Q1
29 quarters
|
|
7990
Canary HBAR ETF
HBR
$55.6M
| $6.54K | ﹤0.01% |
690
+489
| +243% | +$5.75K |
2025 Q4
2 quarters
|
|
7991
CALL
RAVE Restaurant Group
RAVE
$31.3M
| $6.54K | ﹤0.01% |
2,000
+1,700
| +567% | +$4.82K |
2025 Q4
2 quarters
|
|
7992
CALL
Lexeo Therapeutics
LXEO
$237M
| $6.52K | ﹤0.01% |
1,400
-100
| -7% | -$541 |
2025 Q1
5 quarters
|
|
7993
PUT
Comtech Telecommunications
CMTL
$36.6M
| $6.51K | ﹤0.01% |
+3,100
| New | +$11.9K |
2026 Q2
0 quarters
|
|
7994
iShares 0-1 Year Treasury Bond ETF
SHV
$23.5B
| $6.51K | ﹤0.01% |
+59
| New | +$6.5K |
2026 Q2
0 quarters
|
|
7995
CALL
SkinHealth Systems
SKIN
$72.2M
| $6.51K | ﹤0.01% |
470
-440
| -48% | -$6.73K |
2021 Q1
21 quarters
|
|
7996
PUT
Red Rock Resorts
RRR
$2.98B
| $6.51K | ﹤0.01% |
100
| – | – |
2017 Q4
34 quarters
|
|
7997
CALL
AngioDynamics
ANGO
$505M
| $6.5K | ﹤0.01% |
500
-2,500
| -83% | -$28.5K |
2024 Q3
7 quarters
|
|
7998
PUT
Empire State Realty Trust
ESRT
$854M
| $6.49K | ﹤0.01% |
1,200
| – | – |
2026 Q1
1 quarter
|
|
7999
PUT
CGI
GIB
$17B
| $6.46K | ﹤0.01% |
+100
| New | +$6.82K |
2026 Q2
0 quarters
|
|
8000
CALL
SRH US Quality ETF
SRHQ
$224M
| $6.45K | ﹤0.01% |
+100
| New | +$4.37K |
2026 Q2
0 quarters
|
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.