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 | |
|---|---|---|---|---|---|---|
1476
CALL
Globalstar
GSAT
$10.7B
| $3.55M | ﹤0.01% |
43,700
-2,200
| -5% | -$177K |
|
1477
CALL
Weyerhaeuser
WY
$14.4B
| $3.55M | ﹤0.01% |
148,300
+41,800
| +39% | +$1.02M |
|
1478
PUT
Restaurant Brands International
QSR
$25B
| $3.55M | ﹤0.01% |
48,900
+7,400
| +18% | +$563K |
|
1479
PUT
Hershey
HSY
$33.4B
| $3.54M | ﹤0.01% |
20,200
+1,000
| +5% | +$189K |
|
1480
McCormick & Company Non-Voting
MKC
$12.9B
| $3.53M | ﹤0.01% |
70,087
+17,306
| +33% | +$849K |
|
1481
PUT
Vicor
VICR
$13B
| $3.53M | ﹤0.01% |
9,300
+2,500
| +37% | +$683K |
|
1482
CALL
Carpenter Technology
CRS
$19.7B
| $3.52M | ﹤0.01% |
5,700
-1,500
| -21% | -$706K |
|
1483
PUT
Alkermes
ALKS
$6.85B
| $3.52M | ﹤0.01% |
67,100
+51,300
| +325% | +$2M |
|
1484
Pitney Bowes
PBI
$2.25B
| $3.5M | ﹤0.01% |
200,010
+69,071
| +53% | +$1.06M |
|
1485
CALL
T. Rowe Price
TROW
$22.5B
| $3.5M | ﹤0.01% |
30,800
-19,100
| -38% | -$1.95M |
|
1486
Cipher Digital
CIFR
$7.36B
| $3.5M | ﹤0.01% |
142,694
+64,021
| +81% | +$1.35M |
|
1487
PUT
Cummins
CMI
$72.3B
| $3.49M | ﹤0.01% |
4,900
-4,900
| -50% | -$3.23M |
|
1488
CALL
Alnylam Pharmaceuticals
ALNY
$34.2B
| $3.49M | ﹤0.01% |
11,600
-5,300
| -31% | -$1.6M |
|
1489
Spotify
SPOT
$105B
| $3.49M | ﹤0.01% |
7,605
-2,143
| -22% | -$1.02M |
|
|
SOLT
1490
CALL
2x Solana ETF
SOLT
$253M
| $3.49M | ﹤0.01% |
109,300
-8,500
| -7% | -$358K |
|
1491
DaVita
DVA
$11.4B
| $3.49M | ﹤0.01% |
15,675
+3,200
| +26% | +$581K |
|
1492
PUT
Zillow
Z
$6.39B
| $3.49M | ﹤0.01% |
110,800
+58,800
| +113% | +$2.26M |
|
|
1493
Alnylam Pharmaceuticals
ALNY
$34.2B
| $3.48M | ﹤0.01% |
+11,567
| New | +$3.49M |
|
|
CRCG
1494
CALL
Leverage Shares 2X Long CRCL Daily ETF
CRCG
$144M
| $3.48M | ﹤0.01% |
126,800
+118,860
| +1,497% | +$3.04M |
|
1495
CALL
Vanguard S&P 500 Growth ETF
VOOG
$27.8B
| $3.48M | ﹤0.01% |
39,800
+18,200
| +84% | +$1.44M |
|
1496
CALL
Hawaiian Electric Industries
HE
$1.57B
| $3.48M | ﹤0.01% |
256,900
+2,400
| +0.9% | +$34.2K |
|
1497
CALL
Brighthouse Financial
BHF
$3.06B
| $3.48M | ﹤0.01% |
54,900
+10,800
| +24% | +$672K |
|
1498
Papa John's
PZZA
$644M
| $3.47M | ﹤0.01% |
94,496
+48,734
| +106% | +$1.68M |
|
1499
ON Semiconductor
ON
$30.1B
| $3.47M | ﹤0.01% |
+36,689
| New | +$3.76M |
|
1500
PUT
Howmet Aerospace
HWM
$92.7B
| $3.47M | ﹤0.01% |
12,900
+800
| +7% | +$205K |
|
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.