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 | |
|---|---|---|---|---|---|---|
|
SOLS
2401
PUT
Solstice Advanced Materials
SOLS
$8.73B
| $1.11M | ﹤0.01% |
14,600
-8,000
| -35% | -$548K |
|
|
DENT
2402
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $1.11M | ﹤0.01% |
308,900
-1,265,300
| -80% | -$4.54M |
|
2403
PUT
Neurocrine Biosciences
NBIX
$18.2B
| $1.11M | ﹤0.01% |
8,400
-4,200
| -33% | -$557K |
|
2404
Galicia Financial Group
GGAL
$7.76B
| $1.1M | ﹤0.01% |
+23,654
| New | +$1.15M |
|
2405
CALL
Corcept Therapeutics
CORT
$9.99B
| $1.1M | ﹤0.01% |
27,400
+300
| +1% | +$11.2K |
|
2406
CALL
Cabaletta Bio
CABA
$437M
| $1.1M | ﹤0.01% |
410,000
-147,300
| -26% | -$409K |
|
2407
PUT
United States Copper Index Fund
CPER
$738M
| $1.1M | ﹤0.01% |
+32,000
| New | +$1.14M |
|
2408
CALL
Erasca
ERAS
$6.03B
| $1.1M | ﹤0.01% |
68,000
-9,700
| -12% | -$115K |
|
2409
CALL
Ocugen
OCGN
$403M
| $1.1M | ﹤0.01% |
607,400
+376,800
| +163% | +$652K |
|
2410
PUT
Diodes
DIOD
$3.5B
| $1.1M | ﹤0.01% |
16,100
+16,000
| +16,000% | +$1.01M |
|
2411
CALL
NOV
NOV
$7.12B
| $1.1M | ﹤0.01% |
58,400
-170,600
| -74% | -$3.2M |
|
2412
CALL
OneMain Financial
OMF
$7.32B
| $1.1M | ﹤0.01% |
20,500
-43,300
| -68% | -$2.57M |
|
2413
PUT
Genesco
GCO
$420M
| $1.1M | ﹤0.01% |
37,800
+37,700
| +37,700% | +$1.08M |
|
2414
PUT
Vicor
VICR
$8.3B
| $1.09M | ﹤0.01% |
6,800
-9,100
| -57% | -$1.5M |
|
2415
CALL
MasTec
MTZ
$23.6B
| $1.09M | ﹤0.01% |
3,400
+1,800
| +113% | +$487K |
|
2416
CALL
Skyworks Solutions
SWKS
$9.41B
| $1.09M | ﹤0.01% |
20,400
-11,400
| -36% | -$664K |
|
|
JMIA
2417
CALL
Jumia Technologies
JMIA
$717M
| $1.09M | ﹤0.01% |
158,100
+56,200
| +55% | +$566K |
|
2418
CALL
Extra Space Storage
EXR
$32.9B
| $1.09M | ﹤0.01% |
8,300
+6,600
| +388% | +$930K |
|
2419
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$342M
| $1.09M | ﹤0.01% |
10,200
+4,600
| +82% | +$497K |
|
2420
American Eagle Outfitters
AEO
$2.92B
| $1.09M | ﹤0.01% |
+64,987
| New | +$1.46M |
|
2421
CALL
Antero Midstream
AM
$10.4B
| $1.09M | ﹤0.01% |
47,600
-185,700
| -80% | -$3.84M |
|
|
GREK
2422
Global X MSCI Greece ETF
GREK
$291M
| $1.09M | ﹤0.01% |
+16,992
| New | +$1.17M |
|
2423
PUT
Zions Bancorporation
ZION
$10.1B
| $1.08M | ﹤0.01% |
18,800
-8,200
| -30% | -$483K |
|
2424
ProShares Bitcoin Strategy ETF
BITO
$1.4B
| $1.08M | ﹤0.01% |
+116,295
| New | +$1.23M |
|
2425
CALL
Hartford Financial Services
HIG
$39.7B
| $1.08M | ﹤0.01% |
+8,000
| New | +$1.09M |
|
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.