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 | |
|---|---|---|---|---|---|---|
151
CALL
Merck
MRK
$317B
| $75.3M | 0.05% |
626,100
-314,300
| -33% | -$36.3M |
|
152
PUT
Nike
NKE
$61.9B
| $75.2M | 0.05% |
1,424,200
-609,700
| -30% | -$37M |
|
153
CALL
Newmont
NEM
$103B
| $74.8M | 0.05% |
690,700
-372,200
| -35% | -$42.9M |
|
154
PUT
Caterpillar
CAT
$414B
| $74.7M | 0.05% |
105,400
-54,100
| -34% | -$37.5M |
|
|
UWC
155
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $74.6M | 0.05% |
1,690,700
-510,700
| -23% | -$22.5M |
|
156
PUT
PepsiCo
PEP
$184B
| $74M | 0.05% |
476,800
-65,300
| -12% | -$10.2M |
|
157
PUT
Pfizer
PFE
$143B
| $72.7M | 0.05% |
2,587,600
-1,148,800
| -31% | -$30.6M |
|
158
PUT
Wells Fargo
WFC
$262B
| $72.5M | 0.05% |
910,100
-693,400
| -43% | -$59.6M |
|
159
CALL
Walt Disney
DIS
$168B
| $72.3M | 0.05% |
749,900
-302,100
| -29% | -$31.9M |
|
160
CALL
Vanguard S&P 500 ETF
VOO
$981B
| $71.9M | 0.05% |
199,500
-30,100
| -13% | -$18.8M |
|
|
161
PUT
Western Digital
WDC
$193B
| $71.8M | 0.05% |
272,000
-265,100
| -49% | -$69.2M |
|
162
PUT
Costco
COST
$409B
| $71.4M | 0.05% |
71,700
-71,700
| -50% | -$69.9M |
|
163
CALL
Energy Transfer Partners
ET
$70.3B
| $71.1M | 0.05% |
3,683,000
-755,100
| -17% | -$13.8M |
|
|
NBIS
164
PUT
Nebius Group N.V.
NBIS
$56.4B
| $71.1M | 0.05% |
684,900
+27,800
| +4% | +$2.77M |
|
|
NVO
165
PUT
Novo Nordisk
NVO
$215B
| $71M | 0.05% |
1,933,100
-35,700
| -2% | -$1.69M |
|
166
PUT
Delta Air Lines
DAL
$55.3B
| $70.9M | 0.05% |
1,066,500
-414,500
| -28% | -$27.9M |
|
167
CALL
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$17M
| $70.4M | 0.05% |
1,896,400
+1,502,400
| +381% | +$42.6M |
|
168
CALL
ServiceNow
NOW
$99.9B
| $70.2M | 0.05% |
671,500
+369,800
| +123% | +$43.5M |
|
|
SCIU
169
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $69.5M | 0.05% |
1,097,000
+296,900
| +37% | +$18.8M |
|
|
170
CALL
Western Digital
WDC
$193B
| $69.2M | 0.05% |
255,200
-2,200
| -0.9% | -$574K |
|
171
CALL
Freeport-McMoran
FCX
$92.8B
| $68M | 0.05% |
1,156,900
-576,500
| -33% | -$34.8M |
|
172
CALL
Bloom Energy
BE
$64.9B
| $67.5M | 0.05% |
498,400
-321,500
| -39% | -$47.2M |
|
|
CRCL
173
PUT
Circle Internet Group
CRCL
$17.1B
| $67.3M | 0.05% |
705,800
-140,900
| -17% | -$11.9M |
|
174
PUT
Verizon
VZ
$186B
| $67.3M | 0.05% |
1,340,700
+13,800
| +1% | +$640K |
|
175
PUT
Lam Research
LRCX
$400B
| $67.3M | 0.05% |
314,800
-423,800
| -57% | -$94.8M |
|
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.