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 | |
|---|---|---|---|---|---|---|
126
CALL
GE Vernova
GEV
$255B
| $117M | 0.07% |
99,300
+9,600
| +11% | +$9.8M |
|
127
CALL
Qualcomm
QCOM
$216B
| $115M | 0.07% |
624,500
+144,400
| +30% | +$27M |
|
128
CALL
iShares Morningstar Value ETF
ILCV
$1.34B
| $113M | 0.07% |
1,359,100
+181,300
| +15% | +$18M |
|
129
PUT
ExxonMobil
XOM
$660B
| $109M | 0.06% |
799,700
-506,000
| -39% | -$75.7M |
|
130
PUT
Astera Labs
ALAB
$63.3B
| $109M | 0.06% |
224,800
+79,600
| +55% | +$21.1M |
|
131
CALL
ServiceNow
NOW
$140B
| $107M | 0.06% |
1,074,300
+402,800
| +60% | +$39.9M |
|
132
CALL
Visa
V
$690B
| $107M | 0.06% |
310,500
+2,800
| +0.9% | +$899K |
|
133
CALL
McDonald's
MCD
$167B
| $106M | 0.06% |
393,500
+295,200
| +300% | +$84.6M |
|
134
PUT
Berkshire Hathaway Class B
BRK.B
$1.08T
| $106M | 0.06% |
211,800
-21,500
| -9% | -$10.3M |
|
135
CALL
Iris Energy
IREN
$17.4B
| $104M | 0.06% |
2,279,900
+50,800
| +2% | +$2.64M |
|
|
136
PUT
Qualcomm
QCOM
$216B
| $104M | 0.06% |
563,500
+301,700
| +115% | +$56.4M |
|
137
iShares Semiconductor ETF
SOXX
$49.1B
| $104M | 0.06% |
161,532
+45,259
| +39% | +$23M |
|
138
CALL
Salesforce
CRM
$193B
| $103M | 0.06% |
658,900
-20,300
| -3% | -$3.57M |
|
139
PUT
Freeport-McMoran
FCX
$104B
| $102M | 0.06% |
1,619,900
+263,400
| +19% | +$16.9M |
|
|
CRWV
140
CALL
CoreWeave
CRWV
$48.3B
| $101M | 0.06% |
1,014,700
-1,520,400
| -60% | -$164M |
|
141
CALL
Bank of America
BAC
$396B
| $101M | 0.06% |
1,767,400
-1,034,600
| -37% | -$55M |
|
142
PUT
Eli Lilly
LLY
$1.05T
| $100M | 0.06% |
83,700
+10,900
| +15% | +$11.1M |
|
|
143
CALL
Eli Lilly
LLY
$1.05T
| $99.9M | 0.06% |
83,300
-27,900
| -25% | -$28.5M |
|
|
144
CALL
Astera Labs
ALAB
$63.3B
| $97.2M | 0.06% |
201,200
+79,900
| +66% | +$21.2M |
|
|
145
PUT
Visa
V
$690B
| $97.1M | 0.06% |
282,900
-27,000
| -9% | -$8.67M |
|
146
CALL
Newmont
NEM
$128B
| $96.9M | 0.06% |
1,037,400
+346,700
| +50% | +$37.8M |
|
|
147
Amazon
AMZN
$2.69T
| $96.6M | 0.06% |
405,198
-359,686
| -47% | -$90.3M |
|
148
CALL
Pinduoduo
PDD
$110B
| $94.3M | 0.06% |
1,236,800
+136,000
| +12% | +$12.6M |
|
149
CALL
Chevron
CVX
$401B
| $94.2M | 0.06% |
568,400
-177,400
| -24% | -$33M |
|
150
PUT
Applovin
APP
$104B
| $93.6M | 0.05% |
181,600
-126,100
| -41% | -$60.9M |
|
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.