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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
6276
iShares MSCI USA Min Vol Factor ETF
USMV
$23.4B
| $33.5K | ﹤0.01% |
361
-141
| -28% | -$13.4K |
2025 Q3
2 quarters
|
|
6277
PUT
Suburban Propane Partners
SPH
$1.09B
| $33.5K | ﹤0.01% |
1,700
-200
| -11% | -$3.99K |
2021 Q1
20 quarters
|
|
6278
Zymeworks
ZYME
$1.86B
| $33.5K | ﹤0.01% |
1,336
-46,704
| -97% | -$1.11M |
2024 Q1
8 quarters
|
|
6279
CALL
Syntax Stratified LargeCap ETF
SSPY
$126M
| $33.4K | ﹤0.01% |
+1,600
| New | +$145K |
2026 Q1
0 quarters
|
|
6280
YieldMax NFLX Option Income Strategy ETF
NFLY
$33.6M
| $33.4K | ﹤0.01% |
3,045
+2,331
| +326% | +$25.4K |
2025 Q4
1 quarter
|
|
6281
Surgery Partners
SGRY
$1.73B
| $33.4K | ﹤0.01% |
2,798
-26,559
| -90% | -$381K |
2025 Q4
1 quarter
|
|
6282
Direxion Daily Industrials Bull 3X ETF
DUSL
$41.9M
| $33.3K | ﹤0.01% |
+455
| New | +$38.1K |
2026 Q1
0 quarters
|
|
6283
PUT
Fomento Económico Mexicano
FMX
$39.2B
| $33.3K | ﹤0.01% |
+300
| New | +$32.3K |
2026 Q1
0 quarters
|
|
6284
PUT
Amphastar Pharmaceuticals
AMPH
$1.08B
| $33.3K | ﹤0.01% |
+1,700
| New | +$41.6K |
2026 Q1
0 quarters
|
|
6285
CALL
Evolent Health
EVH
$383M
| $33.3K | ﹤0.01% |
14,600
+12,500
| +595% | +$39.7K |
2021 Q2
19 quarters
|
|
6286
CALL
GoPro
GPRO
$274M
| $33.3K | ﹤0.01% |
43,200
-405,200
| -90% | -$407K |
2021 Q2
19 quarters
|
|
6287
CALL
Titan International
TWI
$439M
| $33.2K | ﹤0.01% |
4,800
+4,300
| +860% | +$38.6K |
2020 Q2
23 quarters
|
|
6288
PUT
Atour Lifestyle Holdings
ATAT
$4.39B
| $33.1K | ﹤0.01% |
900
-10,400
| -92% | -$392K |
2024 Q3
6 quarters
|
|
|
EU
6289
PUT
enCore Energy
EU
$202M
| $33.1K | ﹤0.01% |
18,400
+14,900
| +426% | +$38.1K |
2025 Q2
3 quarters
|
|
6290
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.63B
| $33.1K | ﹤0.01% |
+900
| New | +$32K |
2026 Q1
0 quarters
|
|
6291
CALL
Solana Company
HSDT
$158M
| $33K | ﹤0.01% |
19,100
+18,100
| +1,810% | +$44K |
2025 Q4
1 quarter
|
|
6292
PUT
AMN Healthcare
AMN
$1.39B
| $33K | ﹤0.01% |
1,800
+400
| +29% | +$7.6K |
2015 Q3
42 quarters
|
|
6293
CALL
Quince Therapeutics
QNCX
$31.2M
| $32.9K | ﹤0.01% |
1,631
+1,264
| +344% | +$254K |
2024 Q3
6 quarters
|
|
|
IMVP
6294
CALL
Invesco India ETF
IMVP
$93.7M
| $32.8K | ﹤0.01% |
+1,600
| New | +$36.6K |
2026 Q1
0 quarters
|
|
|
SOGP
6295
Sound Group
SOGP
$45.4M
| $32.8K | ﹤0.01% |
1,943
+1,129
| +139% | +$15.7K |
2025 Q2
3 quarters
|
|
6296
Simply Good Foods
SMPL
$874M
| $32.8K | ﹤0.01% |
+2,283
| New | +$39.4K |
2026 Q1
0 quarters
|
|
|
AL
6297
DELISTED
Air Lease Corp
AL
| $32.7K | ﹤0.01% |
504
-1,192
| -70% | -$77K |
2024 Q3
6 quarters
|
|
|
GRID
6298
CALL
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$11.9B
| $32.7K | ﹤0.01% |
200
| – | – |
2025 Q3
2 quarters
|
|
6299
CALL
Knife River
KNF
$2.87B
| $32.7K | ﹤0.01% |
400
-100
| -20% | -$8.05K |
2025 Q2
3 quarters
|
|
6300
Zai Lab
ZLAB
$2.86B
| $32.6K | ﹤0.01% |
1,735
+1,562
| +903% | +$28.9K |
2025 Q4
1 quarter
|
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,157 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.