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 | |
|---|---|---|---|---|---|---|
201
CALL
IBM
IBM
$196B
| $56.5M | 0.04% |
+233,200
| New | +$63.1M |
|
202
CALL
Petrobras
PBR
$122B
| $56.5M | 0.04% |
+2,758,900
| New | +$44.1M |
|
203
PUT
NextEra Energy
NEE
$186B
| $55.8M | 0.04% |
600,400
-34,600
| -5% | -$3.08M |
|
204
PUT
Super Micro Computer
SMCI
$20.6B
| $55.7M | 0.04% |
2,446,400
-516,300
| -17% | -$15.5M |
|
205
CALL
Lumentum
LITE
$65.6B
| $55.6M | 0.04% |
79,100
+7,100
| +10% | +$3.9M |
|
206
CALL
Reddit
RDDT
$32.6B
| $54.8M | 0.04% |
406,900
-189,400
| -32% | -$32.2M |
|
207
PUT
Seagate
STX
$207B
| $54.7M | 0.04% |
+139,600
| New | +$53.3M |
|
208
CALL
Boston Scientific
BSX
$63.7B
| $54.6M | 0.04% |
870,600
+537,400
| +161% | +$43M |
|
|
NBIS
209
CALL
Nebius Group N.V.
NBIS
$57.6B
| $54.6M | 0.04% |
526,100
-532,200
| -50% | -$53.1M |
|
210
PUT
Home Depot
HD
$332B
| $54.4M | 0.04% |
165,300
-55,600
| -25% | -$20.3M |
|
211
PUT
AST SpaceMobile
ASTS
$18.8B
| $54M | 0.04% |
651,800
-1,087,000
| -63% | -$103M |
|
212
PUT
Palo Alto Networks
PANW
$273B
| $53.8M | 0.04% |
335,800
-290,200
| -46% | -$48.8M |
|
213
CALL
Dell
DELL
$288B
| $53.8M | 0.04% |
327,700
-153,700
| -32% | -$20.5M |
|
214
CALL
NIO
NIO
$11.7B
| $53.6M | 0.04% |
8,881,200
-860,700
| -9% | -$4.35M |
|
215
PUT
McDonald's
MCD
$188B
| $53.2M | 0.04% |
171,300
+26,500
| +18% | +$8.44M |
|
216
CALL
Target
TGT
$62.8B
| $53.1M | 0.04% |
438,300
-396,300
| -47% | -$44.7M |
|
217
Advanced Micro Devices
AMD
$907B
| $53M | 0.04% |
260,622
+204,147
| +361% | +$43.6M |
|
218
iShares 20+ Year Treasury Bond ETF
TLT
$42.3B
| $52.7M | 0.04% |
+608,012
| New | +$53.5M |
|
219
PUT
Newmont
NEM
$102B
| $52.2M | 0.04% |
481,900
-39,500
| -8% | -$4.55M |
|
220
PUT
lululemon athletica
LULU
$12.9B
| $51.5M | 0.03% |
336,200
-174,100
| -34% | -$31.2M |
|
221
CALL
Lockheed Martin
LMT
$120B
| $51.2M | 0.03% |
84,700
-38,000
| -31% | -$23.4M |
|
222
PUT
Occidental Petroleum
OXY
$57.1B
| $50.7M | 0.03% |
779,700
-538,200
| -41% | -$27.1M |
|
223
Microsoft
MSFT
$2.89T
| $50.6M | 0.03% |
136,729
+66,119
| +94% | +$27.7M |
|
224
PUT
Moderna
MRNA
$23.3B
| $50.3M | 0.03% |
989,200
-359,300
| -27% | -$16.8M |
|
225
PUT
Merck
MRK
$316B
| $50M | 0.03% |
415,500
-314,100
| -43% | -$36.3M |
|
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.