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 | Held Since | |
|---|---|---|---|---|---|---|---|
|
LOVE
5151
PUT
LoveSac
LOVE
$212M
| $94.5K | ﹤0.01% |
6,400
+2,300
| +56% | +$30.5K |
2019 Q3
26 quarters
|
|
|
CEPO
5152
PUT
Cantor Equity Partners I
CEPO
$274M
| $94.5K | ﹤0.01% |
+9,000
| New | +$94.2K |
2026 Q1
0 quarters
|
|
|
CPRX
5153
DELISTED
Catalyst Pharmaceutical
CPRX
| $94.4K | ﹤0.01% |
+3,811
| New | +$90.8K |
2026 Q1
0 quarters
|
|
5154
Mercury Systems
MRCY
$5.17B
| $94.3K | ﹤0.01% |
+1,294
| New | +$113K |
2026 Q1
0 quarters
|
|
5155
PUT
CVR Energy
CVI
$5.51B
| $94.2K | ﹤0.01% |
2,800
-9,800
| -78% | -$252K |
2022 Q1
16 quarters
|
|
5156
Genesis Energy
GEL
$1.72B
| $94.2K | ﹤0.01% |
5,283
-70,136
| -93% | -$1.21M |
2025 Q3
2 quarters
|
|
5157
CALL
Manchester United
MANU
$3.46B
| $94.2K | ﹤0.01% |
5,600
-40,200
| -88% | -$685K |
2018 Q1
32 quarters
|
|
5158
CALL
Bio-Techne
TECH
$11.4B
| $94.1K | ﹤0.01% |
1,800
-5,600
| -76% | -$336K |
2023 Q1
12 quarters
|
|
|
QVCGA
5159
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $94K | ﹤0.01% |
43,300
+23,800
| +122% | +$145K |
2025 Q3
2 quarters
|
|
5160
Full Truck Alliance
YMM
$8.48B
| $93.9K | ﹤0.01% |
11,317
-28,378
| -71% | -$270K |
2025 Q1
4 quarters
|
|
|
HITI
5161
PUT
High Tide
HITI
$234M
| $93.9K | ﹤0.01% |
41,000
-280,100
| -87% | -$688K |
2024 Q1
8 quarters
|
|
5162
PUT
Equillium
EQ
$89.4M
| $93.6K | ﹤0.01% |
46,800
+46,500
| +15,500% | +$76.5K |
2024 Q4
5 quarters
|
|
5163
Gaotu Techedu
GOTU
$599M
| $93.5K | ﹤0.01% |
47,703
+44,228
| +1,273% | +$96.8K |
2023 Q3
10 quarters
|
|
5164
PUT
Acushnet Holdings
GOLF
$4.89B
| $93.5K | ﹤0.01% |
+1,000
| New | +$95.1K |
2026 Q1
0 quarters
|
|
5165
CALL
Commault Systems
CVLT
$6.23B
| $93.5K | ﹤0.01% |
1,200
-2,600
| -68% | -$247K |
2023 Q1
12 quarters
|
|
5166
PUT
XP
XP
$10.9B
| $93.3K | ﹤0.01% |
4,900
-187,500
| -97% | -$3.62M |
2021 Q1
20 quarters
|
|
5167
PUT
Ichor Holdings
ICHR
$2.36B
| $93.2K | ﹤0.01% |
2,000
+1,200
| +150% | +$46.7K |
2018 Q1
32 quarters
|
|
|
UNHG
5168
Leverage Shares 2X Long UNH Daily ETF
UNHG
$58.8M
| $93K | ﹤0.01% |
9,127
-44,652
| -83% | -$579K |
2025 Q3
2 quarters
|
|
|
BTQ
5169
CALL
BTQ Technologies Corp
BTQ
$466M
| $92.9K | ﹤0.01% |
34,800
-34,700
| -50% | -$122K |
2025 Q4
1 quarter
|
|
5170
CoinShares Bitcoin Mining and Digital Power ETF
WGMI
$294M
| $92.9K | ﹤0.01% |
+2,667
| New | +$112K |
2026 Q1
0 quarters
|
|
5171
PUT
Lennox International
LII
$12.3B
| $92.8K | ﹤0.01% |
200
+100
| +100% | +$51.5K |
2025 Q3
2 quarters
|
|
5172
CALL
Accel Entertainment
ACEL
$880M
| $92.7K | ﹤0.01% |
8,500
+2,500
| +42% | +$28.2K |
2025 Q4
1 quarter
|
|
5173
PUT
SAB Biotherapeutics
SABS
$271M
| $92.7K | ﹤0.01% |
+24,200
| New | +$96.5K |
2026 Q1
0 quarters
|
|
|
INVX
5174
PUT
Innovex International
INVX
$1.91B
| $92.7K | ﹤0.01% |
3,800
+3,500
| +1,167% | +$87.9K |
2025 Q4
1 quarter
|
|
5175
PUT
Cato Corp
CATO
$47.8M
| $92.5K | ﹤0.01% |
32,700
-6,200
| -16% | -$19.1K |
2025 Q3
2 quarters
|
|
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.