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 | |
|---|---|---|---|---|---|---|---|
4451
CALL
DT Midstream
DTM
$12.2B
| $175K | ﹤0.01% |
1,300
+700
| +117% | +$91.3K |
2021 Q4
17 quarters
|
|
4452
PUT
Simply Good Foods
SMPL
$874M
| $175K | ﹤0.01% |
12,200
+10,100
| +481% | +$174K |
2025 Q2
3 quarters
|
|
|
YQ
4453
PUT
17 Education & Technology Group
YQ
$34.1M
| $175K | ﹤0.01% |
+96,700
| New | +$303K |
2026 Q1
0 quarters
|
|
4454
CALL
NET Power
NPWR
$126M
| $175K | ﹤0.01% |
112,100
+33,400
| +42% | +$71.3K |
2023 Q4
9 quarters
|
|
4455
CALL
Ollie's Bargain Outlet
OLLI
$5.22B
| $175K | ﹤0.01% |
1,900
-1,100
| -37% | -$119K |
2015 Q3
42 quarters
|
|
|
TDAY
4456
PUT
USA Today Co
TDAY
$1.04B
| $175K | ﹤0.01% |
24,800
+22,900
| +1,205% | +$140K |
2023 Q4
9 quarters
|
|
4457
Bunge Global
BG
$20.5B
| $175K | ﹤0.01% |
1,374
-1,666
| -55% | -$193K |
2025 Q2
3 quarters
|
|
4458
CALL
BlackRock US Equity Factor Rotation ETF
DYNF
$41.9B
| $175K | ﹤0.01% |
+5,300
| New | +$321K |
2026 Q1
0 quarters
|
|
4459
Sally Beauty Holdings
SBH
$1.5B
| $174K | ﹤0.01% |
12,594
+7,710
| +158% | +$118K |
2025 Q4
1 quarter
|
|
|
CRNX
4460
CALL
DELISTED
Crinetics Pharmaceuticals
CRNX
| $174K | ﹤0.01% |
+4,800
| New | +$214K |
2026 Q1
0 quarters
|
|
|
NVMI
4461
PUT
Nova
NVMI
$12.3B
| $174K | ﹤0.01% |
400
-900
| -69% | -$396K |
2024 Q4
5 quarters
|
|
4462
Glaukos
GKOS
$9.62B
| $174K | ﹤0.01% |
1,613
+627
| +64% | +$70.6K |
2025 Q2
3 quarters
|
|
4463
PUT
Motorola Solutions
MSI
$74.1B
| $174K | ﹤0.01% |
400
-15,900
| -98% | -$6.88M |
2014 Q4
45 quarters
|
|
4464
CALL
Galectin Therapeutics
GALT
$379M
| $174K | ﹤0.01% |
62,200
-52,200
| -46% | -$159K |
2017 Q2
35 quarters
|
|
4465
CALL
Digital Turbine
APPS
$1.4B
| $173K | ﹤0.01% |
60,200
-43,900
| -42% | -$189K |
2021 Q2
19 quarters
|
|
4466
PUT
MINISO
MNSO
$2.67B
| $173K | ﹤0.01% |
10,700
+3,800
| +55% | +$69.7K |
2020 Q4
21 quarters
|
|
4467
Vanguard S&P 500 Growth ETF
VOOG
$27.6B
| $173K | ﹤0.01% |
2,550
-2,382
| -48% | -$172K |
2025 Q4
1 quarter
|
|
4468
PUT
PACCAR
PCAR
$57.9B
| $173K | ﹤0.01% |
1,500
-29,200
| -95% | -$3.53M |
2017 Q1
36 quarters
|
|
4469
CALL
Kimco Realty
KIM
$14.9B
| $173K | ﹤0.01% |
7,700
-13,100
| -63% | -$289K |
2018 Q2
31 quarters
|
|
4470
Aflac
AFL
$55.7B
| $173K | ﹤0.01% |
+1,577
| New | +$175K |
2026 Q1
0 quarters
|
|
4471
Tarsus Pharmaceuticals
TARS
$3.53B
| $173K | ﹤0.01% |
2,465
-548
| -18% | -$38.3K |
2025 Q3
2 quarters
|
|
4472
CALL
Alpha Pro Tech
APT
$51.7M
| $173K | ﹤0.01% |
38,900
+31,300
| +412% | +$154K |
2020 Q1
24 quarters
|
|
4473
Nexstar Media Group
NXST
$4.89B
| $173K | ﹤0.01% |
+955
| New | +$214K |
2026 Q1
0 quarters
|
|
4474
PUT
Millicom
TIGO
$14.4B
| $172K | ﹤0.01% |
2,300
-15,200
| -87% | -$997K |
2025 Q2
3 quarters
|
|
4475
PubMatic
PUBM
$874M
| $172K | ﹤0.01% |
20,989
+9,662
| +85% | +$74.3K |
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.