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 | |
|---|---|---|---|---|---|---|
376
SPDR Gold Trust
GLD
$145B
| $28.2M | 0.02% |
76,477
-154,135
| -67% | -$63.9M |
|
377
CALL
Vale
VALE
$57.9B
| $28.1M | 0.02% |
1,869,100
+102,000
| +6% | +$1.66M |
|
378
CALL
Pan American Silver
PAAS
$19.9B
| $28.1M | 0.02% |
626,800
-75,300
| -11% | -$4.03M |
|
379
CALL
ProShares UltraPro Short QQQ
SQQQ
$1.88B
| $27.9M | 0.02% |
751,200
+405,900
| +118% | +$19.6M |
|
380
PUT
First Solar
FSLR
$19.1B
| $27.9M | 0.02% |
118,200
+12,200
| +12% | +$2.86M |
|
381
CALL
Invesco Aerospace & Defense ETF
PPA
$7.6B
| $27.8M | 0.02% |
136,800
+30,300
| +28% | +$5.19M |
|
382
CALL
Cigna
CI
$71.9B
| $27.6M | 0.02% |
100,200
+65,100
| +185% | +$18.4M |
|
383
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$113M
| $27.5M | 0.02% |
742,700
-20,200
| -3% | -$787K |
|
384
UnitedHealth
UNH
$338B
| $27.4M | 0.02% |
65,879
-221,701
| -77% | -$82.2M |
|
385
PUT
Lowe's Companies
LOW
$106B
| $27.3M | 0.02% |
124,000
-14,000
| -10% | -$3.18M |
|
386
CALL
Lucid Motors
LCID
$1.6B
| $27.3M | 0.02% |
4,081,200
+522,600
| +15% | +$3.37M |
|
387
CALL
Chipotle Mexican Grill
CMG
$39.6B
| $27.2M | 0.02% |
799,100
+56,000
| +8% | +$1.83M |
|
388
CALL
DraftKings
DKNG
$10.9B
| $26.8M | 0.02% |
1,059,000
+49,400
| +5% | +$1.22M |
|
389
CALL
Coupang
CPNG
$24.9B
| $26.7M | 0.02% |
1,536,800
+578,800
| +60% | +$10.4M |
|
390
CALL
Hims & Hers Health
HIMS
$6.86B
| $26.6M | 0.02% |
768,500
-260,000
| -25% | -$6.98M |
|
391
CALL
Toronto Dominion Bank
TD
$198B
| $26.6M | 0.02% |
219,400
+18,800
| +9% | +$2.06M |
|
392
PUT
Take-Two Interactive
TTWO
$37.7B
| $26.4M | 0.02% |
105,800
+58,200
| +122% | +$12.8M |
|
393
PUT
Lockheed Martin
LMT
$120B
| $26.4M | 0.02% |
51,800
-600
| -1% | -$324K |
|
394
CALL
Teradyne
TER
$62.3B
| $26.2M | 0.02% |
54,200
+2,900
| +6% | +$1.09M |
|
395
PUT
American Express
AXP
$209B
| $26.2M | 0.02% |
77,500
-47,700
| -38% | -$15.3M |
|
396
CALL
KLA
KLAC
$245B
| $26.2M | 0.02% |
86,800
-23,200
| -21% | -$4.61M |
|
|
SCHW
397
PUT
Charles Schwab
SCHW
$171B
| $26.2M | 0.02% |
283,700
+26,200
| +10% | +$2.39M |
|
398
PUT
Airbnb
ABNB
$92.8B
| $26.2M | 0.02% |
182,900
-26,200
| -13% | -$3.57M |
|
399
CALL
Bristol-Myers Squibb
BMY
$128B
| $26.2M | 0.02% |
454,200
-251,700
| -36% | -$14.5M |
|
400
CALL
Deere & Co
DE
$186B
| $25.8M | 0.02% |
40,700
+5,000
| +14% | +$2.9M |
|
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.