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 | |
|---|---|---|---|---|---|---|
5376
PUT
E.W. Scripps
SSP
$306M
| $115K | ﹤0.01% |
41,400
-800
| -2% | -$3.03K |
|
5377
CALL
Lennox International
LII
$13.5B
| $115K | ﹤0.01% |
200
-400
| -67% | -$204K |
|
5378
Alarm.com
ALRM
$2.77B
| $115K | ﹤0.01% |
+2,451
| New | +$110K |
|
5379
Middleby
MIDD
$5.05B
| $114K | ﹤0.01% |
+664
| New | +$100K |
|
5380
Pyxis Oncology
PYXS
$324M
| $114K | ﹤0.01% |
37,902
+37,649
| +14,881% | +$72K |
|
5381
PUT
GFL Environmental
GFL
$19.1B
| $114K | ﹤0.01% |
+3,100
| New | +$117K |
|
|
UHT
5382
CALL
Universal Health Realty Income Trust
UHT
$567M
| $114K | ﹤0.01% |
+2,600
| New | +$107K |
|
5383
PUT
Vanguard FTSE Developed Markets ETF
VEA
$241B
| $114K | ﹤0.01% |
1,600
-8,700
| -84% | -$606K |
|
5384
Global X Blockchain ETF
BKCH
$299M
| $114K | ﹤0.01% |
1,523
+476
| +45% | +$37.7K |
|
5385
CALL
Pangaea Logistics
PANL
$560M
| $114K | ﹤0.01% |
17,500
+1,500
| +9% | +$11.4K |
|
5386
CALL
Veritone
VERI
$91.1M
| $114K | ﹤0.01% |
83,000
+30,900
| +59% | +$59K |
|
5387
Bausch + Lomb
BLCO
$6.44B
| $114K | ﹤0.01% |
+6,855
| New | +$109K |
|
|
AUTL
5388
CALL
Autolus Therapeutics
AUTL
$596M
| $113K | ﹤0.01% |
70,900
-2,000
| -3% | -$3.14K |
|
5389
PUT
Urban Outfitters
URBN
$6.94B
| $113K | ﹤0.01% |
1,600
-600
| -27% | -$42.8K |
|
5390
PUT
Tarsus Pharmaceuticals
TARS
$3.98B
| $113K | ﹤0.01% |
+1,800
| New | +$115K |
|
5391
AGF US Market Neutral Anti-Beta Fund
BTAL
$296M
| $113K | ﹤0.01% |
10,151
+9,261
| +1,041% | +$113K |
|
5392
Accel Entertainment
ACEL
$965M
| $113K | ﹤0.01% |
+8,971
| New | +$109K |
|
5393
Yeti Holdings
YETI
$2.98B
| $113K | ﹤0.01% |
+2,281
| New | +$98.9K |
|
5394
PUT
Acuity Brands
AYI
$10B
| $113K | ﹤0.01% |
+300
| New | +$88.9K |
|
5395
Coca-Cola Femsa
KOF
$23.5B
| $113K | ﹤0.01% |
+1,063
| New | +$111K |
|
5396
Xponential Fitness
XPOF
$207M
| $113K | ﹤0.01% |
+16,298
| New | +$103K |
|
|
POWR
5397
iShares U.S. Power Infrastructure ETF
POWR
$462M
| $113K | ﹤0.01% |
+4,029
| New | +$110K |
|
5398
CALL
Universal Display
OLED
$3.78B
| $113K | ﹤0.01% |
1,300
+100
| +8% | +$9.23K |
|
5399
PUT
Eagle Materials
EXP
$5.97B
| $113K | ﹤0.01% |
500
-600
| -55% | -$125K |
|
5400
PUT
Progyny
PGNY
$1.99B
| $112K | ﹤0.01% |
+3,900
| New | +$87.1K |
|
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.