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 | |
|---|---|---|---|---|---|---|
3051
CAVA Group
CAVA
$7.61B
| $606K | ﹤0.01% |
+7,488
| New | +$546K |
|
3052
PUT
Ecopetrol
EC
$33.7B
| $606K | ﹤0.01% |
40,400
-13,500
| -25% | -$171K |
|
3053
PUT
Insmed
INSM
$22.4B
| $605K | ﹤0.01% |
3,700
-17,000
| -82% | -$2.61M |
|
3054
PUT
Jazz Pharmaceuticals
JAZZ
$16.1B
| $605K | ﹤0.01% |
3,200
-2,300
| -42% | -$402K |
|
3055
Riot Platforms
RIOT
$6.9B
| $605K | ﹤0.01% |
+48,934
| New | +$751K |
|
3056
PUT
Xenon Pharmaceuticals
XENE
$6.1B
| $605K | ﹤0.01% |
10,400
+10,100
| +3,367% | +$465K |
|
3057
PUT
Silicon Laboratories
SLAB
$7.14B
| $604K | ﹤0.01% |
2,900
+2,000
| +222% | +$367K |
|
|
SOBO
3058
CALL
South Bow Corp
SOBO
$7.79B
| $603K | ﹤0.01% |
18,100
+10,600
| +141% | +$322K |
|
3059
Talos Energy
TALO
$2.38B
| $603K | ﹤0.01% |
+38,248
| New | +$491K |
|
3060
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $602K | ﹤0.01% |
2,800
+400
| +17% | +$89.2K |
|
3061
PUT
AAR Corp
AIR
$5.4B
| $602K | ﹤0.01% |
5,500
+3,600
| +189% | +$387K |
|
3062
AdvanSix
ASIX
$542M
| $602K | ﹤0.01% |
+24,672
| New | +$466K |
|
|
BZAI
3063
CALL
Blaize Holdings
BZAI
$108M
| $602K | ﹤0.01% |
330,700
+168,400
| +104% | +$249K |
|
3064
National Grid
NGG
$79.3B
| $601K | ﹤0.01% |
7,103
+2,020
| +40% | +$174K |
|
3065
WPP
WPP
$4.67B
| $599K | ﹤0.01% |
38,530
+34,815
| +937% | +$654K |
|
3066
CALL
BellRing Brands
BRBR
$1.55B
| $599K | ﹤0.01% |
37,200
+1,400
| +4% | +$28.3K |
|
3067
PUT
Herc Holdings
HRI
$4.78B
| $597K | ﹤0.01% |
6,000
+1,000
| +20% | +$143K |
|
3068
PUT
Trinity Capital Inc.
TRIN
$1.58B
| $597K | ﹤0.01% |
40,600
+11,200
| +38% | +$173K |
|
3069
PUT
ADT
ADT
$5.43B
| $597K | ﹤0.01% |
90,900
-3,700
| -4% | -$27.8K |
|
3070
CALL
Evercore
EVR
$11.8B
| $597K | ﹤0.01% |
2,000
+1,200
| +150% | +$393K |
|
3071
ProShares Ultra Bloomberg Crude Oil
UCO
$432M
| $596K | ﹤0.01% |
15,159
+4,776
| +46% | +$133K |
|
3072
CALL
Disc Medicine
IRON
$2.81B
| $595K | ﹤0.01% |
9,300
+9,100
| +4,550% | +$632K |
|
3073
Defiance Quantum ETF
QTUM
$4.89B
| $592K | ﹤0.01% |
5,521
+875
| +19% | +$100K |
|
|
ONIT
3074
Onity Group
ONIT
$342M
| $592K | ﹤0.01% |
15,075
-2,457
| -14% | -$107K |
|
3075
CALL
Grocery Outlet
GO
$904M
| $591K | ﹤0.01% |
83,900
+80,600
| +2,442% | +$700K |
|
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.