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 | |
|---|---|---|---|---|---|---|
|
TDAY
3201
CALL
USA Today Co
TDAY
$931M
| $699K | ﹤0.01% |
81,800
+68,200
| +501% | +$515K |
|
|
BZUN
3202
PUT
Baozun
BZUN
$179M
| $699K | ﹤0.01% |
247,000
+2,500
| +1% | +$6.74K |
|
3203
iShares MSCI Poland ETF
EPOL
$830M
| $699K | ﹤0.01% |
18,097
+6,904
| +62% | +$271K |
|
3204
CALL
Gold Fields
GFI
$31.6B
| $699K | ﹤0.01% |
20,800
-45,100
| -68% | -$1.88M |
|
3205
PUT
Life Time Group Holdings
LTH
$8.84B
| $698K | ﹤0.01% |
17,100
+15,600
| +1,040% | +$495K |
|
3206
PUT
Freshpet
FRPT
$2.74B
| $698K | ﹤0.01% |
11,800
+7,200
| +157% | +$412K |
|
3207
CALL
Kodak
KODK
$942M
| $697K | ﹤0.01% |
75,400
-124,400
| -62% | -$1.36M |
|
3208
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.39B
| $697K | ﹤0.01% |
17,300
+13,500
| +355% | +$490K |
|
3209
PUT
Clear Secure
YOU
$4.13B
| $697K | ﹤0.01% |
12,500
-30,700
| -71% | -$1.68M |
|
3210
PUT
Howard Hughes
HHH
$4.41B
| $693K | ﹤0.01% |
9,700
+400
| +4% | +$26K |
|
3211
PUT
Eldorado Gold
EGO
$10.3B
| $693K | ﹤0.01% |
22,300
-76,000
| -77% | -$2.47M |
|
|
NUCL
3212
CALL
Eagle Nuclear Energy Corp
NUCL
$188M
| $693K | ﹤0.01% |
+72,100
| New | +$729K |
|
3213
PUT
Universal Display
OLED
$3.48B
| $693K | ﹤0.01% |
8,000
+7,900
| +7,900% | +$729K |
|
|
DX
3214
CALL
Dynex Capital
DX
$2.83B
| $692K | ﹤0.01% |
52,800
+51,800
| +5,180% | +$681K |
|
|
BABO
3215
PUT
YieldMax BABA Option Income Strategy ETF
BABO
$13.5M
| $691K | ﹤0.01% |
63,300
-1,100
| -2% | -$10.6K |
|
|
BCPC
3216
Balchem Corp
BCPC
$5.36B
| $690K | ﹤0.01% |
4,085
-3,944
| -49% | -$655K |
|
3217
CALL
Atmos Energy
ATO
$26.5B
| $689K | ﹤0.01% |
4,000
+1,500
| +60% | +$269K |
|
3218
Floor & Decor
FND
$4.99B
| $689K | ﹤0.01% |
11,605
+3,095
| +36% | +$157K |
|
3219
Helmerich & Payne
HP
$3.74B
| $689K | ﹤0.01% |
21,031
+376
| +2% | +$14.1K |
|
3220
CALL
Rithm Capital
RITM
$5.08B
| $687K | ﹤0.01% |
73,200
-9,300
| -11% | -$88.6K |
|
3221
PUT
MoonLake Immunotherapeutics
MLTX
$997M
| $687K | ﹤0.01% |
35,300
+1,500
| +4% | +$27.2K |
|
3222
CALL
Elicio Therapeutics
ELTX
$48.9M
| $687K | ﹤0.01% |
175,700
+130,600
| +290% | +$1.31M |
|
3223
American Superconductor
AMSC
$1.42B
| $686K | ﹤0.01% |
+16,533
| New | +$748K |
|
|
RAL
3224
Ralliant Corp
RAL
$7.71B
| $686K | ﹤0.01% |
9,316
+5,264
| +130% | +$293K |
|
3225
PUT
SharkNinja
SN
$25.8B
| $685K | ﹤0.01% |
+4,500
| New | +$539K |
|
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.