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 | |
|---|---|---|---|---|---|---|
1926
PUT
MakeMyTrip
MMYT
$4.67B
| $1.78M | ﹤0.01% |
+47,600
| New | +$2.76M |
|
|
SLNO
1927
PUT
DELISTED
Soleno Therapeutics
SLNO
| $1.77M | ﹤0.01% |
53,000
-54,000
| -50% | -$2.12M |
|
1928
CALL
DuPont de Nemours
DD
$18.6B
| $1.77M | ﹤0.01% |
14,000
-38,833
| -74% | -$5.36M |
|
1929
CALL
Check Point Software Technologies
CHKP
$13.3B
| $1.77M | ﹤0.01% |
+12,400
| New | +$2.08M |
|
1930
PUT
Williams-Sonoma
WSM
$26.7B
| $1.77M | ﹤0.01% |
9,700
-5,600
| -37% | -$1.12M |
|
1931
PUT
Mettler-Toledo International
MTD
$26.8B
| $1.77M | ﹤0.01% |
+1,400
| New | +$1.89M |
|
1932
PUT
Joby Aviation
JOBY
$6.82B
| $1.77M | ﹤0.01% |
213,700
-147,000
| -41% | -$1.66M |
|
|
CRON
1933
CALL
Cronos Group
CRON
$1.05B
| $1.76M | ﹤0.01% |
702,000
+7,500
| +1% | +$19.5K |
|
1934
CALL
New Oriental
EDU
$7.84B
| $1.76M | ﹤0.01% |
+31,100
| New | +$1.78M |
|
1935
PUT
Travere Therapeutics
TVTX
$5.33B
| $1.76M | ﹤0.01% |
59,200
+57,500
| +3,382% | +$1.72M |
|
1936
Fabrinet
FN
$17.1B
| $1.76M | ﹤0.01% |
3,366
-2,307
| -41% | -$1.17M |
|
|
PPLC
1937
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.75M | ﹤0.01% |
46,700
-30,900
| -40% | -$1.16M |
|
1938
Insmed
INSM
$23.2B
| $1.75M | ﹤0.01% |
+10,715
| New | +$1.65M |
|
1939
Sphere Entertainment
SPHR
$4.88B
| $1.75M | ﹤0.01% |
14,889
-26,466
| -64% | -$2.77M |
|
1940
Constellation Energy
CEG
$98B
| $1.75M | ﹤0.01% |
6,258
-38,453
| -86% | -$11.7M |
|
1941
PUT
Hycroft Mining Holding Corp
HYMC
$1.85B
| $1.75M | ﹤0.01% |
49,600
+3,900
| +9% | +$151K |
|
1942
CALL
Ericsson
ERIC
$30.7B
| $1.74M | ﹤0.01% |
+154,800
| New | +$1.68M |
|
1943
PUT
Aurora
AUR
$11.7B
| $1.74M | ﹤0.01% |
422,900
+71,100
| +20% | +$315K |
|
1944
PUT
Tradeweb Markets
TW
$21.3B
| $1.74M | ﹤0.01% |
14,800
-4,400
| -23% | -$504K |
|
1945
PUT
Fluence Energy
FLNC
$1.78B
| $1.74M | ﹤0.01% |
126,500
-146,400
| -54% | -$2.94M |
|
1946
Lithia Motors
LAD
$7.78B
| $1.74M | ﹤0.01% |
+6,970
| New | +$2.07M |
|
1947
CALL
Raymond James Financial
RJF
$32.5B
| $1.74M | ﹤0.01% |
12,000
-5,700
| -32% | -$904K |
|
1948
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $1.73M | ﹤0.01% |
134,100
+52,200
| +64% | +$1.38M |
|
1949
Crown Castle
CCI
$32.7B
| $1.73M | ﹤0.01% |
21,302
+11,703
| +122% | +$1.01M |
|
1950
Cogent Communications
CCOI
$594M
| $1.73M | ﹤0.01% |
91,893
+6,998
| +8% | +$154K |
|
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.