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 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NVX
8451
NOVONIX
NVX
$106M
| $1.61K | ﹤0.01% |
2,340
-31,544
| -93% | -$30.6K |
|
8452
CALL
MediWound
MDWD
$184M
| $1.61K | ﹤0.01% |
100
-17,800
| -99% | -$310K |
|
|
CSR
8453
Centerspace
CSR
$941M
| $1.61K | ﹤0.01% |
+28
| New | +$1.76K |
|
|
DCBO
8454
Docebo
DCBO
$492M
| $1.61K | ﹤0.01% |
+92
| New | +$1.76K |
|
8455
PUT
Monro
MNRO
$535M
| $1.6K | ﹤0.01% |
+100
| New | +$1.94K |
|
8456
PUT
Verastem
VSTM
$518M
| $1.59K | ﹤0.01% |
300
-3,500
| -92% | -$21.6K |
|
8457
PUT
Cibus
CBUS
$134M
| $1.58K | ﹤0.01% |
+800
| New | +$2.06K |
|
8458
CALL
BuzzFeed
BZFD
$104M
| $1.58K | ﹤0.01% |
2,600
-5,400
| -68% | -$4.4K |
|
|
8459
PUT
BuzzFeed
BZFD
$104M
| $1.58K | ﹤0.01% |
2,600
-100
| -4% | -$81 |
|
|
OKTG
8460
Leverage Shares 2X Long OKTA Daily ETF
OKTG
$2.96M
| $1.58K | ﹤0.01% |
+138
| New | +$1.89K |
|
8461
WisdomTree Global ex-U.S. Quality Growth Fund
DNL
$479M
| $1.57K | ﹤0.01% |
+39
| New | +$1.66K |
|
8462
First Business Financial Services
FBIZ
$552M
| $1.56K | ﹤0.01% |
+29
| New | +$1.61K |
|
8463
ICU Medical
ICUI
$3.96B
| $1.55K | ﹤0.01% |
+12
| New | +$1.73K |
|
8464
Sutro Biopharma
STRO
$387M
| $1.54K | ﹤0.01% |
+62
| New | +$1.12K |
|
8465
PUT
EverQuote
EVER
$903M
| $1.54K | ﹤0.01% |
100
-300
| -75% | -$5.67K |
|
|
KIDZ
8466
PUT
KIDZ AI Inc Class B
KIDZ
$1.22M
| $1.54K | ﹤0.01% |
50
+48
| +2,400% | +$3.02K |
|
|
FBRT
8467
Franklin BSP Realty Trust
FBRT
$603M
| $1.53K | ﹤0.01% |
+180
| New | +$1.71K |
|
8468
FirstService
FSV
$6.5B
| $1.53K | ﹤0.01% |
11
-892
| -99% | -$136K |
|
8469
CALL
Hafnia
HAFN
$3.77B
| $1.52K | ﹤0.01% |
200
-8,900
| -98% | -$59K |
|
8470
PUT
AmpliTech
AMPG
$169M
| $1.52K | ﹤0.01% |
+800
| New | +$2.36K |
|
8471
CALL
Global Water Resources
GWRS
$210M
| $1.52K | ﹤0.01% |
200
-2,500
| -93% | -$21K |
|
|
SHOE
8472
Shoe Station Group
SHOE
$399M
| $1.51K | ﹤0.01% |
+97
| New | +$1.84K |
|
8473
PUT
Sight Sciences
SGHT
$264M
| $1.51K | ﹤0.01% |
400
| – | – |
|
|
BCIC
8474
PUT
BCP Investment Corp
BCIC
$87.5M
| $1.5K | ﹤0.01% |
200
-100
| -33% | -$1.08K |
|
|
MICC
8475
CALL
The Magnum Ice Cream Company N.V.
MICC
$11.1B
| $1.5K | ﹤0.01% |
+100
| New | +$1.62K |
|
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 withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- 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 2,156 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.