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 | |
|---|---|---|---|---|---|---|
7276
T-Rex 2X Inverse Tesla Daily Target ETF
TSLZ
$33.9M
| $11K | ﹤0.01% |
694
+603
| +663% | +$8.22K |
|
7277
PUT
CareTrust REIT
CTRE
$10B
| $11K | ﹤0.01% |
300
-500
| -63% | -$19.2K |
|
7278
CALL
Artivion
AORT
$1.21B
| $11K | ﹤0.01% |
300
-200
| -40% | -$7.89K |
|
7279
Crexendo
CXDO
$249M
| $11K | ﹤0.01% |
1,778
-443
| -20% | -$2.91K |
|
|
WW
7280
WW International
WW
$149M
| $11K | ﹤0.01% |
798
-12,869
| -94% | -$288K |
|
7281
CALL
Columbia Sportswear
COLM
$3.23B
| $11K | ﹤0.01% |
200
-900
| -82% | -$51.8K |
|
7282
PUT
Scully Royalty
SRL
$79.6M
| $10.9K | ﹤0.01% |
+1,400
| New | +$12K |
|
7283
PUT
Saratoga Investment
SAR
$317M
| $10.9K | ﹤0.01% |
500
-6,200
| -93% | -$143K |
|
7284
PUT
Gentex
GNTX
$5.1B
| $10.9K | ﹤0.01% |
500
+400
| +400% | +$9.27K |
|
|
SHOE
7285
CALL
Shoe Station Group
SHOE
$403M
| $10.9K | ﹤0.01% |
700
-1,100
| -61% | -$20.9K |
|
7286
PUT
Garrett Motion
GTX
$6.06B
| $10.9K | ﹤0.01% |
+600
| New | +$11.2K |
|
7287
Castor Maritime
CTRM
$19.4M
| $10.9K | ﹤0.01% |
5,878
+3,235
| +122% | +$6.9K |
|
7288
T-Rex 2X Long Microsoft Daily Target ETF
MSFX
$31.5M
| $10.9K | ﹤0.01% |
+714
| New | +$14.3K |
|
7289
PUT
TFI International
TFII
$12.4B
| $10.9K | ﹤0.01% |
100
| – | – |
|
7290
PUT
Breakwave Tanker Shipping ETF
BWET
$30.4M
| $10.8K | ﹤0.01% |
+200
| New | +$10.5K |
|
7291
CALL
Kamada
KMDA
$409M
| $10.8K | ﹤0.01% |
1,300
+600
| +86% | +$5.05K |
|
7292
PUT
ASE Group
ASX
$87.8B
| $10.8K | ﹤0.01% |
500
+100
| +25% | +$2.1K |
|
7293
PUT
Personalis
PSNL
$1.41B
| $10.8K | ﹤0.01% |
1,700
+400
| +31% | +$3.38K |
|
7294
PUT
The RMR Group
RMR
$340M
| $10.8K | ﹤0.01% |
700
-500
| -42% | -$8.12K |
|
7295
CALL
ALX Oncology
ALXO
$258M
| $10.8K | ﹤0.01% |
5,400
-2,600
| -33% | -$4.95K |
|
7296
PUT
MarineMax
HZO
$748M
| $10.8K | ﹤0.01% |
400
-400
| -50% | -$11.1K |
|
7297
CALL
Federal Signal
FSS
$6.96B
| $10.8K | ﹤0.01% |
+100
| New | +$11.3K |
|
7298
CALL
Compañía de Minas Buenaventura
BVN
$7.94B
| $10.8K | ﹤0.01% |
+300
| New | +$10.8K |
|
7299
PUT
Gaia
GAIA
$50.9M
| $10.8K | ﹤0.01% |
+3,900
| New | +$12.8K |
|
7300
PUT
Fate Therapeutics
FATE
$330M
| $10.8K | ﹤0.01% |
9,000
+3,100
| +53% | +$3.77K |
|
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.