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 | |
|---|---|---|---|---|---|---|
|
VISN
2151
PUT
Vistance Networks Inc
VISN
$1.43B
| $1.81M | ﹤0.01% |
141,800
-79,200
| -36% | -$1.12M |
|
2152
Voya Financial
VOYA
$8.81B
| $1.81M | ﹤0.01% |
+20,002
| New | +$1.63M |
|
2153
AbbVie
ABBV
$467B
| $1.81M | ﹤0.01% |
+7,173
| New | +$1.54M |
|
2154
Centrus Energy
LEU
$3.01B
| $1.8M | ﹤0.01% |
+10,733
| New | +$2.01M |
|
2155
CALL
Peabody Energy
BTU
$3.1B
| $1.8M | ﹤0.01% |
77,800
-34,700
| -31% | -$922K |
|
2156
CALL
Xerox
XRX
$436M
| $1.79M | ﹤0.01% |
833,600
+259,700
| +45% | +$648K |
|
2157
BioNTech
BNTX
$24.7B
| $1.79M | ﹤0.01% |
19,254
+5,221
| +37% | +$491K |
|
2158
CALL
DoubleVerify
DV
$2.08B
| $1.79M | ﹤0.01% |
165,200
+82,200
| +99% | +$846K |
|
|
FIG
2159
Figma
FIG
$11.1B
| $1.79M | ﹤0.01% |
98,975
+42,081
| +74% | +$847K |
|
|
FLG
2160
Flagstar Bank National Association
FLG
$5.13B
| $1.79M | ﹤0.01% |
119,814
+5,232
| +5% | +$74.2K |
|
2161
CALL
Garrett Motion
GTX
$4.8B
| $1.79M | ﹤0.01% |
49,400
+47,000
| +1,958% | +$1.31M |
|
2162
PUT
Nutrien
NTR
$34.5B
| $1.79M | ﹤0.01% |
28,400
+11,000
| +63% | +$769K |
|
2163
PUT
Check Point Software Technologies
CHKP
$13.4B
| $1.79M | ﹤0.01% |
13,600
-12,400
| -48% | -$1.61M |
|
2164
CALL
Papa John's
PZZA
$644M
| $1.79M | ﹤0.01% |
48,600
+8,100
| +20% | +$280K |
|
2165
CALL
Cooper Companies
COO
$10.5B
| $1.79M | ﹤0.01% |
24,900
+24,100
| +3,013% | +$1.58M |
|
|
PPL
2166
PUT
PPL Corp
PPL
$24.1B
| $1.78M | ﹤0.01% |
49,100
-37,700
| -43% | -$1.39M |
|
|
VCX
2167
PUT
Fundrise Innovation Fund
VCX
$1.08B
| $1.78M | ﹤0.01% |
+20,600
| New | +$2.94M |
|
2168
PUT
McEwen Inc
MUX
$1.17B
| $1.78M | ﹤0.01% |
98,200
-4,600
| -4% | -$99.4K |
|
|
HELP
2169
CALL
Cybin Inc
HELP
$921M
| $1.78M | ﹤0.01% |
269,300
+158,000
| +142% | +$790K |
|
2170
CALL
CDW
CDW
$16.9B
| $1.77M | ﹤0.01% |
12,600
+4,500
| +56% | +$565K |
|
2171
CALL
Bruker
BRKR
$9.78B
| $1.77M | ﹤0.01% |
29,400
+28,200
| +2,350% | +$1.32M |
|
2172
PUT
W.W. Grainger
GWW
$58.5B
| $1.77M | ﹤0.01% |
1,300
+900
| +225% | +$1.11M |
|
|
MDLN
2173
PUT
Medline Inc
MDLN
$30.4B
| $1.77M | ﹤0.01% |
44,800
+11,200
| +33% | +$451K |
|
|
JMIA
2174
CALL
Jumia Technologies
JMIA
$919M
| $1.77M | ﹤0.01% |
250,400
+92,300
| +58% | +$656K |
|
2175
PUT
Fortune Brands Innovations
FBIN
$4.7B
| $1.76M | ﹤0.01% |
32,100
+27,400
| +583% | +$1.1M |
|
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.