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 | |
|---|---|---|---|---|---|---|
3226
CALL
Biomea Fusion
BMEA
$88.2M
| $514K | ﹤0.01% |
335,700
-47,500
| -12% | -$62.4K |
|
3227
Cedar Fair
FUN
$1.81B
| $514K | ﹤0.01% |
+28,935
| New | +$488K |
|
|
FRMM
3228
PUT
Forum Markets
FRMM
$70.9M
| $514K | ﹤0.01% |
177,700
-7,500
| -4% | -$28.6K |
|
3229
CALL
Apogee Therapeutics
APGE
$10.2B
| $513K | ﹤0.01% |
6,100
+1,500
| +33% | +$109K |
|
3230
CALL
Leidos
LDOS
$14.1B
| $513K | ﹤0.01% |
3,300
+900
| +38% | +$162K |
|
3231
PUT
nLIGHT
LASR
$3.71B
| $513K | ﹤0.01% |
9,000
+8,800
| +4,400% | +$477K |
|
3232
CALL
abrdn Physical Gold Shares ETF
SGOL
$7.01B
| $513K | ﹤0.01% |
11,500
-116,500
| -91% | -$5.41M |
|
3233
CALL
CubeSmart
CUBE
$9.34B
| $513K | ﹤0.01% |
14,000
-400
| -3% | -$15.3K |
|
|
XOVR
3234
EntrepreneurShares Series Trust ERShares Private-Public Crossover ETF
XOVR
$1.79B
| $513K | ﹤0.01% |
+30,371
| New | +$552K |
|
3235
International Paper
IP
$22.8B
| $513K | ﹤0.01% |
+14,365
| New | +$597K |
|
3236
VanEck Uranium + Nuclear Energy ETF
NLR
$3.88B
| $513K | ﹤0.01% |
3,848
-8,921
| -70% | -$1.27M |
|
|
3237
nLIGHT
LASR
$3.71B
| $512K | ﹤0.01% |
8,988
-5,927
| -40% | -$321K |
|
3238
CALL
Summit Therapeutics
SMMT
$10.7B
| $512K | ﹤0.01% |
27,000
-117,700
| -81% | -$1.9M |
|
|
GPGI
3239
CALL
GPGI Inc
GPGI
$3.9B
| $511K | ﹤0.01% |
29,900
+19,800
| +196% | +$429K |
|
3240
PUT
Spire Global
SPIR
$440M
| $511K | ﹤0.01% |
40,600
-19,300
| -32% | -$206K |
|
3241
CALL
Harmony Biosciences
HRMY
$2.08B
| $510K | ﹤0.01% |
+18,200
| New | +$597K |
|
3242
PUT
Casey's General Stores
CASY
$32.1B
| $510K | ﹤0.01% |
700
-600
| -46% | -$391K |
|
3243
CALL
McCormick & Company Non-Voting
MKC
$13.7B
| $509K | ﹤0.01% |
10,100
-3,000
| -23% | -$191K |
|
3244
CALL
CareTrust REIT
CTRE
$9.84B
| $509K | ﹤0.01% |
13,900
+5,100
| +58% | +$196K |
|
3245
PUT
Otis Worldwide
OTIS
$27.3B
| $509K | ﹤0.01% |
6,600
+2,500
| +61% | +$219K |
|
3246
CALL
GoodRx Holdings
GDRX
$1.07B
| $508K | ﹤0.01% |
259,300
+74,500
| +40% | +$175K |
|
3247
Corvus Pharmaceuticals
CRVS
$1.11B
| $508K | ﹤0.01% |
+34,723
| New | +$554K |
|
3248
CALL
Alpha and Omega Semiconductor
AOSL
$931M
| $507K | ﹤0.01% |
22,900
+21,700
| +1,808% | +$472K |
|
3249
PUT
Gartner
IT
$10.2B
| $507K | ﹤0.01% |
3,200
-3,900
| -55% | -$718K |
|
3250
CALL
CytomX Therapeutics
CTMX
$714M
| $507K | ﹤0.01% |
107,800
+8,800
| +9% | +$44.7K |
|
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.