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 | |
|---|---|---|---|---|---|---|
2201
PUT
KeyCorp
KEY
$22B
| $1.71M | ﹤0.01% |
74,300
-24,500
| -25% | -$534K |
|
2202
PUT
CEVA Inc
CEVA
$1.02B
| $1.71M | ﹤0.01% |
36,300
+29,400
| +426% | +$1.04M |
|
2203
CALL
Guidewire Software
GWRE
$11.9B
| $1.71M | ﹤0.01% |
13,900
+12,600
| +969% | +$1.68M |
|
2204
Newell Brands
NWL
$2.31B
| $1.71M | ﹤0.01% |
+278,474
| New | +$1.18M |
|
2205
General Mills
GIS
$18B
| $1.7M | ﹤0.01% |
+48,973
| New | +$1.69M |
|
2206
PUT
Clover Health Investments
CLOV
$2.38B
| $1.7M | ﹤0.01% |
324,700
+121,100
| +59% | +$411K |
|
2207
PUT
Plug Power
PLUG
$2.77B
| $1.7M | ﹤0.01% |
627,800
-337,000
| -35% | -$1.06M |
|
2208
CALL
Arbor Realty Trust
ABR
$752M
| $1.7M | ﹤0.01% |
313,800
+55,600
| +22% | +$361K |
|
2209
Constellation Brands
STZ
$19.4B
| $1.7M | ﹤0.01% |
12,217
-24,959
| -67% | -$3.71M |
|
|
ABK
2210
CALL
DELISTED
Ambac Financial Group
ABK
| $1.7M | ﹤0.01% |
272,200
+251,600
| +1,221% | +$1.57M |
|
2211
PUT
CoreCivic
CXW
$3.18B
| $1.7M | ﹤0.01% |
55,900
-4,000
| -7% | -$90.7K |
|
2212
CALL
SOPHiA GENETICS
SOPH
$710M
| $1.7M | ﹤0.01% |
294,200
+267,200
| +990% | +$1.36M |
|
2213
PUT
PENN Entertainment
PENN
$2.1B
| $1.7M | ﹤0.01% |
79,400
-108,900
| -58% | -$1.95M |
|
2214
Mettler-Toledo International
MTD
$30.3B
| $1.7M | ﹤0.01% |
+1,327
| New | +$1.6M |
|
2215
CALL
Xcel Energy
XEL
$43.6B
| $1.69M | ﹤0.01% |
21,100
+10,300
| +95% | +$822K |
|
|
FPS
2216
CALL
Forgent Power Solutions
FPS
$10.7B
| $1.69M | ﹤0.01% |
30,300
-27,300
| -47% | -$1.25M |
|
|
JPGE
2217
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $1.69M | ﹤0.01% |
29,900
+16,900
| +130% | +$956K |
|
2218
CALL
Amylyx Pharmaceuticals
AMLX
$3.76B
| $1.69M | ﹤0.01% |
94,100
+61,400
| +188% | +$950K |
|
2219
CALL
Fortuna Silver Mines
FSM
$3.46B
| $1.69M | ﹤0.01% |
200,000
-47,300
| -19% | -$458K |
|
2220
PUT
NextDecade
NEXT
$1.75B
| $1.69M | ﹤0.01% |
224,100
+46,300
| +26% | +$366K |
|
2221
Lemonade
LMND
$3.48B
| $1.69M | ﹤0.01% |
25,960
+24,921
| +2,399% | +$1.46M |
|
|
NUAI
2222
PUT
New Era Energy & Digital Inc
NUAI
$853M
| $1.69M | ﹤0.01% |
264,600
-21,300
| -7% | -$103K |
|
2223
CALL
Ferguson
FERG
$43.1B
| $1.69M | ﹤0.01% |
7,100
-6,500
| -48% | -$1.57M |
|
2224
PUT
Goldman Sachs Access US Aggregate Bond ETF
GCOR
$807M
| $1.68M | ﹤0.01% |
29,300
+19,300
| +193% | +$794K |
|
2225
PUT
Dave Inc
DAVE
$4.14B
| $1.68M | ﹤0.01% |
4,500
+800
| +22% | +$208K |
|
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.