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 | |
|---|---|---|---|---|---|---|
226
PUT
United Airlines
UAL
$36.9B
| $49.6M | 0.03% |
539,100
-101,700
| -16% | -$10.7M |
|
227
CALL
GameStop
GME
$9.59B
| $49.5M | 0.03% |
3,470,400
-1,917,100
| -36% | -$44.5M |
|
228
PUT
PayPal
PYPL
$49.2B
| $49.2M | 0.03% |
1,087,300
-132,700
| -11% | -$6.4M |
|
|
SCIU
229
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $49.1M | 0.03% |
829,700
+332,400
| +67% | +$19.7M |
|
230
CALL
Arista Networks
ANET
$223B
| $48.9M | 0.03% |
398,400
-332,500
| -45% | -$44.5M |
|
231
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$424M
| $48.8M | 0.03% |
935,450
+440,100
| +89% | +$17.6M |
|
232
CALL
Shell
SHEL
$245B
| $48.5M | 0.03% |
521,500
-2,200
| -0.4% | -$178K |
|
233
PUT
AT&T
T
$160B
| $47.9M | 0.03% |
1,654,000
+70,400
| +4% | +$1.88M |
|
234
PUT
IBM
IBM
$192B
| $47.7M | 0.03% |
+196,600
| New | +$53.2M |
|
235
PUT
Walt Disney
DIS
$162B
| $47.3M | 0.03% |
490,800
-311,000
| -39% | -$32.9M |
|
236
CALL
Shopify
SHOP
$146B
| $47M | 0.03% |
395,900
-256,300
| -39% | -$33.7M |
|
237
CALL
SLB Ltd
SLB
$70.9B
| $46.8M | 0.03% |
909,800
-280,100
| -24% | -$13.6M |
|
238
CALL
First Solar
FSLR
$22.2B
| $46.5M | 0.03% |
235,700
-210,800
| -47% | -$46.6M |
|
239
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.06B
| $46.5M | 0.03% |
268,600
+63,300
| +31% | +$1.85M |
|
240
CALL
Procter & Gamble
PG
$340B
| $46.1M | 0.03% |
319,200
-153,700
| -33% | -$23.3M |
|
241
CALL
Analog Devices
ADI
$184B
| $45.5M | 0.03% |
143,000
+60,500
| +73% | +$19.2M |
|
242
PUT
Rio Tinto
RIO
$149B
| $45.2M | 0.03% |
484,300
+294,200
| +155% | +$26.8M |
|
243
CALL
BP
BP
$114B
| $45.1M | 0.03% |
960,500
+592,100
| +161% | +$23.2M |
|
244
CALL
Gilead Sciences
GILD
$161B
| $45.1M | 0.03% |
323,900
+101,500
| +46% | +$14.2M |
|
245
CALL
Corning
GLW
$136B
| $44.7M | 0.03% |
328,500
-62,900
| -16% | -$7.59M |
|
246
CALL
lululemon athletica
LULU
$12.6B
| $44.3M | 0.03% |
289,600
-263,800
| -48% | -$47.3M |
|
247
CALL
Adobe
ADBE
$84.6B
| $44.3M | 0.03% |
182,200
-184,800
| -50% | -$51.2M |
|
248
CALL
TeraWulf
WULF
$10.2B
| $43.9M | 0.03% |
3,045,000
-1,371,100
| -31% | -$20.3M |
|
249
CALL
Rocket Lab Corp
RKLB
$43.5B
| $43.8M | 0.03% |
682,600
-128,000
| -16% | -$9.65M |
|
250
PUT
Johnson & Johnson
JNJ
$622B
| $43.7M | 0.03% |
178,800
-330,000
| -65% | -$76.9M |
|
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.