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 | |
|---|---|---|---|---|---|---|
6351
PUT
ReNew
RNW
$2.5B
| $47.5K | ﹤0.01% |
7,600
+900
| +13% | +$5.07K |
|
|
GAU
6352
CALL
Galiano Gold
GAU
$594M
| $47.5K | ﹤0.01% |
25,400
-73,000
| -74% | -$169K |
|
|
MDA
6353
MDA Space Ltd
MDA
$4.78B
| $47.3K | ﹤0.01% |
+1,147
| New | +$41.6K |
|
6354
CALL
Vitesse Energy
VTS
$749M
| $47.3K | ﹤0.01% |
3,000
-1,300
| -30% | -$23K |
|
|
AIFC
6355
CALL
AI Financial Corp
AIFC
$78.4M
| $47.2K | ﹤0.01% |
80,700
+42,200
| +110% | +$35.4K |
|
6356
CALL
Neurogene
NGNE
$772M
| $47.2K | ﹤0.01% |
1,500
-1,700
| -53% | -$46.8K |
|
6357
PUT
SES AI
SES
$187M
| $47.1K | ﹤0.01% |
49,100
+30,900
| +170% | +$33.6K |
|
|
IBX
6358
Tradr 2X Long IBM Daily ETF
IBX
$45.5M
| $47.1K | ﹤0.01% |
+1,598
| New | +$39.9K |
|
6359
CALL
Alpha Architect US Quantitative Value ETF
QVAL
$631M
| $47.1K | ﹤0.01% |
700
+100
| +17% | +$5.46K |
|
|
CCC
6360
PUT
CCC Intelligent Solutions
CCC
$4.42B
| $47K | ﹤0.01% |
9,100
+100
| +1% | +$495 |
|
6361
Sprott Junior Gold Miners ETF
SGDJ
$377M
| $46.8K | ﹤0.01% |
621
-1,654
| -73% | -$145K |
|
6362
CALL
Coya Therapeutics
COYA
$112M
| $46.8K | ﹤0.01% |
8,000
-100
| -1% | -$463 |
|
6363
PUT
Metallus
MTUS
$826M
| $46.7K | ﹤0.01% |
2,500
-1,300
| -34% | -$24.4K |
|
6364
Hafnia
HAFN
$4.61B
| $46.7K | ﹤0.01% |
7,034
-53,360
| -88% | -$432K |
|
6365
CALL
Compass Minerals
CMP
$1.06B
| $46.7K | ﹤0.01% |
1,500
+1,200
| +400% | +$33.9K |
|
6366
Arcos Dorados Holdings
ARCO
$1.72B
| $46.7K | ﹤0.01% |
+5,789
| New | +$50K |
|
6367
CALL
Gaotu Techedu
GOTU
$517M
| $46.6K | ﹤0.01% |
28,100
-100
| -0.4% | -$182 |
|
|
MREO
6368
CALL
Mereo BioPharma
MREO
$39.9M
| $46.5K | ﹤0.01% |
146,200
-56,900
| -28% | -$17.1K |
|
6369
TETRA Technologies
TTI
$1.02B
| $46.4K | ﹤0.01% |
4,095
-497
| -11% | -$4.87K |
|
6370
PUT
Woodside Energy
WDS
$43.3B
| $46.4K | ﹤0.01% |
2,400
-6,700
| -74% | -$149K |
|
|
CAI
6371
PUT
Caris Life Sciences
CAI
$7.08B
| $46.3K | ﹤0.01% |
2,600
-2,300
| -47% | -$41.2K |
|
6372
iShares Preferred and Income Securities ETF
PFF
$13B
| $46.3K | ﹤0.01% |
+1,519
| New | +$47.3K |
|
6373
Direxion Daily NYSE FANG+ Bull 2X ETF
FNGG
$128M
| $46.3K | ﹤0.01% |
209
-98
| -32% | -$21.5K |
|
6374
CALL
Philips
PHG
$25.3B
| $46.2K | ﹤0.01% |
1,700
-2,656
| -61% | -$70.3K |
|
|
SPCQ
6375
Defiance Daily Target 2X Short SPCX ETF
SPCQ
$11.8M
| $46.2K | ﹤0.01% |
+3,412
| New | +$50.1K |
|
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.