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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2276
CALL
Choice Hotels
CHH
$4.62B
| $1.24M | ﹤0.01% |
12,000
+11,800
| +5,900% | +$1.23M |
|
2277
PUT
Sweetgreen
SG
$1.06B
| $1.24M | ﹤0.01% |
239,200
-49,800
| -17% | -$303K |
|
2278
CALL
Legend Biotech
LEGN
$3.85B
| $1.24M | ﹤0.01% |
68,600
+56,700
| +476% | +$1.08M |
|
|
EMBJ
2279
PUT
Embraer S.A. ADS
EMBJ
$13.4B
| $1.24M | ﹤0.01% |
20,900
-4,800
| -19% | -$329K |
|
2280
PUT
MSCI
MSCI
$39.2B
| $1.24M | ﹤0.01% |
2,300
-400
| -15% | -$226K |
|
2281
CALL
indie Semiconductor
INDI
$679M
| $1.24M | ﹤0.01% |
385,000
-70,700
| -16% | -$250K |
|
2282
CALL
United Microelectronic
UMC
$61.8B
| $1.24M | ﹤0.01% |
+138,000
| New | +$1.35M |
|
2283
CALL
Global X S&P 500 Tail Risk ETF
XTR
$4.92M
| $1.24M | ﹤0.01% |
25,200
-2,800
| -10% | -$73.6K |
|
2284
CVR Partners
UAN
$1.31B
| $1.24M | ﹤0.01% |
9,763
+7,834
| +406% | +$896K |
|
|
GLXY
2285
Galaxy Digital Inc
GLXY
$4.45B
| $1.24M | ﹤0.01% |
+67,001
| New | +$1.59M |
|
2286
PUT
NexGen Energy
NXE
$6.12B
| $1.23M | ﹤0.01% |
106,300
-114,000
| -52% | -$1.36M |
|
2287
TORM
TRMD
$3.9B
| $1.23M | ﹤0.01% |
+44,157
| New | +$1.12M |
|
|
IMSR
2288
CALL
Terrestrial Energy
IMSR
$416M
| $1.23M | ﹤0.01% |
204,800
+44,800
| +28% | +$355K |
|
2289
CALL
Imperial Oil
IMO
$59.5B
| $1.23M | ﹤0.01% |
9,400
-46,300
| -83% | -$5.19M |
|
2290
CALL
Saia
SAIA
$8.93B
| $1.23M | ﹤0.01% |
3,500
-2,800
| -44% | -$1.02M |
|
2291
Adtran
ADTN
$556M
| $1.23M | ﹤0.01% |
97,585
+82,738
| +557% | +$839K |
|
|
NUAI
2292
CALL
New Era Energy & Digital Inc
NUAI
$820M
| $1.23M | ﹤0.01% |
+302,000
| New | +$1.52M |
|
2293
CALL
Under Armour Class C
UA
$1.89B
| $1.22M | ﹤0.01% |
208,100
+134,800
| +184% | +$851K |
|
2294
CALL
Resideo Technologies
REZI
$2.79B
| $1.22M | ﹤0.01% |
36,300
+35,300
| +3,530% | +$1.26M |
|
2295
CALL
Molson Coors Class B
TAP
$6.81B
| $1.22M | ﹤0.01% |
28,400
+2,800
| +11% | +$133K |
|
|
FITB
2296
PUT
Fifth Third Bancorp
FITB
$45.9B
| $1.22M | ﹤0.01% |
26,200
-38,400
| -59% | -$1.89M |
|
2297
CALL
Arrowhead Research
ARWR
$9.33B
| $1.22M | ﹤0.01% |
+19,400
| New | +$1.23M |
|
2298
Enbridge
ENB
$104B
| $1.22M | ﹤0.01% |
22,465
+18,053
| +409% | +$920K |
|
2299
CALL
Gaming and Leisure Properties
GLPI
$11.1B
| $1.22M | ﹤0.01% |
27,400
+24,200
| +756% | +$1.12M |
|
2300
Knight Transportation
KNX
$10.4B
| $1.22M | ﹤0.01% |
+21,104
| New | +$1.21M |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.