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 | |
|---|---|---|---|---|---|---|
|
CRON
3176
Cronos Group
CRON
$1.22B
| $533K | ﹤0.01% |
212,416
-569,150
| -73% | -$1.48M |
|
3177
Iovance Biotherapeutics
IOVA
$6.71B
| $533K | ﹤0.01% |
151,831
-177,232
| -54% | -$567K |
|
|
SPYQ
3178
CALL
Tradr 2X Long SPY Quarterly ETF
SPYQ
$11.9M
| $533K | ﹤0.01% |
+38,500
| New | +$6.15M |
|
3179
Rogers Corp
ROG
$2.73B
| $532K | ﹤0.01% |
4,960
-370
| -7% | -$38.1K |
|
3180
NovaGold Resources
NG
$2.85B
| $532K | ﹤0.01% |
59,282
+7,325
| +14% | +$75.4K |
|
3181
CALL
Olema Pharmaceuticals
OLMA
$756M
| $532K | ﹤0.01% |
35,700
+6,400
| +22% | +$142K |
|
3182
PUT
Open Text
OTEX
$5.43B
| $532K | ﹤0.01% |
23,900
+16,600
| +227% | +$431K |
|
3183
PUT
Geron
GERN
$790M
| $531K | ﹤0.01% |
356,600
+36,500
| +11% | +$55.5K |
|
3184
CALL
Semtech
SMTC
$16.6B
| $531K | ﹤0.01% |
6,900
-12,400
| -64% | -$1.02M |
|
3185
Kinsale Capital Group
KNSL
$7.35B
| $530K | ﹤0.01% |
+1,552
| New | +$588K |
|
3186
PUT
DuPont de Nemours
DD
$17.5B
| $530K | ﹤0.01% |
11,600
-13,833
| -54% | -$1.91M |
|
3187
Mineralys Therapeutics
MLYS
$2.22B
| $530K | ﹤0.01% |
19,562
+14,760
| +307% | +$433K |
|
3188
Automatic Data Processing
ADP
$102B
| $529K | ﹤0.01% |
+2,602
| New | +$597K |
|
3189
PUT
Kura Oncology
KURA
$953M
| $528K | ﹤0.01% |
65,000
-23,000
| -26% | -$198K |
|
3190
CALL
Marten Transport
MRTN
$1.06B
| $528K | ﹤0.01% |
+40,200
| New | +$516K |
|
|
BLD
3191
CALL
DELISTED
TopBuild
BLD
| $527K | ﹤0.01% |
1,500
+900
| +150% | +$403K |
|
3192
PUT
Donaldson
DCI
$10.1B
| $526K | ﹤0.01% |
+6,200
| New | +$599K |
|
3193
PUT
Bowman Consulting
BWMN
$739M
| $526K | ﹤0.01% |
+18,500
| New | +$603K |
|
3194
CALL
NetEase
NTES
$77.6B
| $526K | ﹤0.01% |
4,700
-7,900
| -63% | -$980K |
|
3195
Village Farms International
VFF
$356M
| $526K | ﹤0.01% |
185,228
+128,369
| +226% | +$417K |
|
3196
CALL
Helmerich & Payne
HP
$3.71B
| $526K | ﹤0.01% |
14,600
-54,000
| -79% | -$1.84M |
|
3197
Sundial Growers
SNDL
$317M
| $525K | ﹤0.01% |
397,934
+65,153
| +20% | +$99.6K |
|
3198
Markel Group
MKL
$21.2B
| $524K | ﹤0.01% |
274
-366
| -57% | -$743K |
|
|
SA
3199
PUT
Seabridge Gold
SA
$3.06B
| $524K | ﹤0.01% |
18,500
-25,600
| -58% | -$817K |
|
|
JBTM
3200
PUT
JBT Marel
JBTM
$5.48B
| $524K | ﹤0.01% |
4,100
-2,300
| -36% | -$348K |
|
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.