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 | |
|---|---|---|---|---|---|---|
426
PUT
Intuit
INTU
$77B
| $20.5M | 0.01% |
47,300
+14,200
| +43% | +$6.77M |
|
427
CALL
Coherent
COHR
$61.3B
| $20.4M | 0.01% |
85,800
+7,700
| +10% | +$1.76M |
|
428
PUT
Charter Communications
CHTR
$15.6B
| $20.3M | 0.01% |
+94,000
| New | +$20.4M |
|
429
PUT
IonQ
IONQ
$12.7B
| $20.1M | 0.01% |
698,800
-538,700
| -44% | -$20.7M |
|
430
CALL
Deere & Co
DE
$165B
| $20.1M | 0.01% |
35,700
-2,600
| -7% | -$1.47M |
|
431
PUT
Intuitive Surgical
ISRG
$119B
| $20M | 0.01% |
43,400
-56,900
| -57% | -$28.8M |
|
432
PUT
First Majestic Silver
AG
$8.12B
| $19.9M | 0.01% |
927,500
+364,200
| +65% | +$8.39M |
|
433
PUT
Honeywell
HON
$78B
| $19.5M | 0.01% |
106,900
-9,200
| -8% | -$2.1M |
|
|
UCD
434
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $19.5M | 0.01% |
325,200
+92,300
| +40% | +$5.53M |
|
435
PUT
NIO
NIO
$11.6B
| $19.4M | 0.01% |
3,214,600
-1,168,400
| -27% | -$5.9M |
|
436
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $19.4M | 0.01% |
+643,000
| New | +$20.7M |
|
437
CALL
Energy Fuels
UUUU
$3B
| $19.3M | 0.01% |
1,059,600
-994,200
| -48% | -$20.6M |
|
438
CALL
Invesco Aerospace & Defense ETF
PPA
$8.22B
| $19.2M | 0.01% |
+106,500
| New | +$18.6M |
|
439
PUT
Accenture
ACN
$84.9B
| $19.2M | 0.01% |
96,600
-69,500
| -42% | -$16.2M |
|
440
CALL
BHP
BHP
$212B
| $19.1M | 0.01% |
262,600
+93,400
| +55% | +$6.6M |
|
|
441
PUT
BHP
BHP
$212B
| $19.1M | 0.01% |
262,600
+111,900
| +74% | +$7.91M |
|
442
CALL
Datadog
DDOG
$87B
| $19.1M | 0.01% |
161,800
-285,300
| -64% | -$35.2M |
|
443
PUT
Petrobras
PBR
$122B
| $19.1M | 0.01% |
+925,900
| New | +$14.8M |
|
|
ZVOL
444
CALL
Volatility Premium Plus ETF
ZVOL
$12.9M
| $19M | 0.01% |
1,264,000
+31,800
| +3% | +$314K |
|
445
Dow Inc
DOW
$22.3B
| $19M | 0.01% |
459,257
+161,937
| +54% | +$5.14M |
|
446
PUT
MongoDB
MDB
$24.1B
| $18.9M | 0.01% |
77,200
-79,500
| -51% | -$26.6M |
|
447
PUT
Devon Energy
DVN
$52.2B
| $18.9M | 0.01% |
375,200
-101,400
| -21% | -$4.35M |
|
448
PepsiCo
PEP
$184B
| $18.9M | 0.01% |
+121,557
| New | +$18.9M |
|
449
CALL
Toronto Dominion Bank
TD
$197B
| $18.7M | 0.01% |
200,600
-78,400
| -28% | -$7.46M |
|
450
CALL
Royal Caribbean
RCL
$76B
| $18.6M | 0.01% |
67,500
-27,700
| -29% | -$8.25M |
|
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.