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 | |
|---|---|---|---|---|---|---|
3151
Invesco DB US Dollar Index Bearish Fund
UDN
$109M
| $549K | ﹤0.01% |
+30,481
| New | +$556K |
|
|
ARR
3152
CALL
Armour Residential REIT
ARR
$2.33B
| $547K | ﹤0.01% |
32,800
-10,300
| -24% | -$182K |
|
|
AL
3153
CALL
DELISTED
Air Lease Corp
AL
| $545K | ﹤0.01% |
+8,400
| New | +$542K |
|
3154
PUT
Edgewise Therapeutics
EWTX
$4.42B
| $545K | ﹤0.01% |
17,300
+10,100
| +140% | +$291K |
|
3155
PUT
Cooper Companies
COO
$14.2B
| $543K | ﹤0.01% |
7,600
-14,800
| -66% | -$1.17M |
|
3156
CALL
IDEAYA Biosciences
IDYA
$3.5B
| $543K | ﹤0.01% |
16,300
+10,300
| +172% | +$346K |
|
3157
CALL
Modine Manufacturing
MOD
$10.3B
| $542K | ﹤0.01% |
2,500
-4,300
| -63% | -$809K |
|
3158
iShares MSCI World ETF
URTH
$7.98B
| $542K | ﹤0.01% |
3,009
+2,269
| +307% | +$425K |
|
3159
PUT
A.O. Smith
AOS
$8.24B
| $541K | ﹤0.01% |
8,200
-16,600
| -67% | -$1.2M |
|
3160
Calumet Specialty Products
CLMT
$3.81B
| $541K | ﹤0.01% |
+15,061
| New | +$390K |
|
3161
PUT
Tyra Biosciences
TYRA
$1.97B
| $540K | ﹤0.01% |
14,100
+13,900
| +6,950% | +$450K |
|
|
CMPS
3162
CALL
Compass Pathways
CMPS
$1.56B
| $540K | ﹤0.01% |
97,600
-42,500
| -30% | -$286K |
|
3163
PUT
Richtech Robotics
RR
$322M
| $540K | ﹤0.01% |
258,200
-429,900
| -62% | -$1.32M |
|
3164
Halliburton
HAL
$26.4B
| $539K | ﹤0.01% |
+13,835
| New | +$479K |
|
3165
CALL
Corebridge Financial
CRBG
$14.4B
| $539K | ﹤0.01% |
22,600
-14,700
| -39% | -$411K |
|
3166
PUT
TMC The Metals Company
TMC
$1.57B
| $538K | ﹤0.01% |
115,100
-126,300
| -52% | -$814K |
|
3167
Magnolia Oil & Gas
MGY
$5.93B
| $536K | ﹤0.01% |
+16,976
| New | +$454K |
|
3168
PUT
FreightCar America
RAIL
$261M
| $536K | ﹤0.01% |
67,200
+100
| +0.1% | +$1.13K |
|
3169
CALL
Atlas Energy Solutions
AESI
$1.29B
| $535K | ﹤0.01% |
40,800
-11,600
| -22% | -$136K |
|
3170
Praxis Precision Medicines
PRAX
$8.58B
| $535K | ﹤0.01% |
+1,660
| New | +$514K |
|
3171
PUT
Unicycive Therapeutics
UNCY
$145M
| $534K | ﹤0.01% |
+81,200
| New | +$532K |
|
|
METU
3172
Direxion Daily META Bull 2X ETF
METU
$311M
| $534K | ﹤0.01% |
23,861
-16,315
| -41% | -$481K |
|
|
HELP
3173
CALL
Cybin Inc
HELP
$505M
| $534K | ﹤0.01% |
111,300
+9,100
| +9% | +$58.9K |
|
|
CNR
3174
CALL
Core Natural Resources Inc
CNR
$4.09B
| $534K | ﹤0.01% |
5,100
-1,300
| -20% | -$124K |
|
3175
Comfort Systems
FIX
$59.8B
| $534K | ﹤0.01% |
387
-1,951
| -83% | -$2.48M |
|
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.