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 | |
|---|---|---|---|---|---|---|
2151
PUT
CoStar Group
CSGP
$12.7B
| $1.39M | ﹤0.01% |
34,500
-23,200
| -40% | -$1.21M |
|
2152
Lincoln National
LNC
$8.12B
| $1.39M | ﹤0.01% |
39,189
-27,066
| -41% | -$1.04M |
|
|
TTAN
2153
CALL
ServiceTitan Inc
TTAN
$7.62B
| $1.39M | ﹤0.01% |
21,900
-100
| -0.5% | -$7.72K |
|
2154
Harley-Davidson
HOG
$2.66B
| $1.39M | ﹤0.01% |
68,731
-7,248
| -10% | -$142K |
|
2155
CALL
J.M. Smucker
SJM
$13.3B
| $1.39M | ﹤0.01% |
14,400
-31,600
| -69% | -$3.31M |
|
2156
Starbucks
SBUX
$118B
| $1.39M | ﹤0.01% |
15,493
-79,841
| -84% | -$7.55M |
|
2157
Sigma Lithium
SGML
$1.06B
| $1.39M | ﹤0.01% |
+112,439
| New | +$1.44M |
|
|
BRSL
2158
PUT
Brightstar Lottery PLC
BRSL
$1.94B
| $1.39M | ﹤0.01% |
108,900
+99,300
| +1,034% | +$1.37M |
|
2159
Scorpio Tankers
STNG
$3.92B
| $1.39M | ﹤0.01% |
+18,556
| New | +$1.24M |
|
2160
CALL
Clover Health Investments
CLOV
$2.26B
| $1.38M | ﹤0.01% |
+786,900
| New | +$1.71M |
|
2161
Brookdale Senior Living
BKD
$3.63B
| $1.38M | ﹤0.01% |
101,198
+18,467
| +22% | +$259K |
|
|
DAWN
2162
DELISTED
Day One Biopharmaceuticals
DAWN
| $1.38M | ﹤0.01% |
+64,464
| New | +$908K |
|
2163
PUT
Levi Strauss
LEVI
$9.73B
| $1.38M | ﹤0.01% |
74,700
+7,800
| +12% | +$160K |
|
2164
American Express
AXP
$227B
| $1.38M | ﹤0.01% |
+4,556
| New | +$1.53M |
|
2165
PUT
Academy Sports + Outdoors
ASO
$3.19B
| $1.38M | ﹤0.01% |
+24,400
| New | +$1.39M |
|
2166
CALL
Glacier Bancorp
GBCI
$6.44B
| $1.38M | ﹤0.01% |
30,800
+2,800
| +10% | +$133K |
|
|
SEI
2167
CALL
Solaris Energy Infrastructure
SEI
$2.94B
| $1.37M | ﹤0.01% |
24,300
-26,900
| -53% | -$1.46M |
|
2168
CALL
ASP Isotopes
ASPI
$499M
| $1.37M | ﹤0.01% |
310,100
-140,300
| -31% | -$830K |
|
2169
MakeMyTrip
MMYT
$5.11B
| $1.37M | ﹤0.01% |
+36,713
| New | +$2.13M |
|
2170
PUT
Samsara
IOT
$21.8B
| $1.37M | ﹤0.01% |
43,200
-75,100
| -63% | -$2.29M |
|
2171
CALL
Ocular Therapeutix
OCUL
$1.84B
| $1.37M | ﹤0.01% |
161,300
-34,300
| -18% | -$327K |
|
2172
CALL
Hycroft Mining Holding Corp
HYMC
$1.79B
| $1.37M | ﹤0.01% |
38,800
-27,300
| -41% | -$1.06M |
|
2173
PUT
Stanley Black & Decker
SWK
$14.8B
| $1.36M | ﹤0.01% |
19,200
-42,300
| -69% | -$3.4M |
|
2174
Owens Corning
OC
$11.7B
| $1.36M | ﹤0.01% |
12,601
+8,162
| +184% | +$973K |
|
2175
CALL
Curtiss-Wright
CW
$26.8B
| $1.36M | ﹤0.01% |
2,000
+1,800
| +900% | +$1.2M |
|
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.