And it's betting on some widely held names that might not surprise investors: mammoths like Apple , Amazon , and Facebook that Wall Street is generally quite bullish on.
Juul Labs gained attention in December after tobacco giant Altria paid $12.8 billion for a 35% stake in the company, sparking a renewed discussion over the future of the fast-growing e-cigarette industry.
Altria , which makes Marlboro cigarettes, said earlier this year that Juul Labs recorded $1 billion in revenue in 2018, up from $200 million a year earlier. Since Juul is a private company, investors can't look at its financials in the same way they can a public one.
Its weighting in the high-performing Fidelity fund is slightly larger than the next few main holdings Alphabet's Class C shares (4.8%) followed by Microsoft and Amazon shares (both at 4.6%), and Amazon shares (3.9%).
Kyle Weaver , the portfolio manager overseeing the fund, said in its annual report last November that stock-picking in the consumer staples sector stood out. That included "top contributor" Juul Labs.
"Sales of the company's e-cigarette devices and pods increased significantly the past 12 months, leading to a higher valuation," Weaver said.
Still, he added: "The company and the industry face a number of social and public policy concerns."
Other classes of Juul Labs stock are included in the fund as well, but at far smaller weightings. As of the fund's latest monthly report, on January 31, it contained 208 components.
Here's a snapshot of the fund's top holdings, along with their performance in the year through January 31, 2019 when Fidelity last detailed the fund's positions in its monthly holdings report.
13. T-Mobile
Ticker: TMUS Industry group: Telecommunications Position: 990,500 Net weight: 1.625% Performance from 1/31/2018 - 1/31/2019: +7.2%
12. Nvidia
Ticker: NVDA Industry group: Semiconductors Position: 483,030 Net weight: 1.636% Performance from 1/31/2018 - 1/31/2019: -41%
11. Tesla
Ticker: TSLA Industry group: Auto manufacturers Position: 247,477 Net weight: 1.79% Performance from 1/31/2018 - 1/31/2019: -14%
10. Wix.com
Ticker: WIX Industry group: Internet content and information Position: 710,535 Net weight: 1.831% Performance from 1/31/2018 - 1/31/2019: +79%
9. Salesforce.com
Ticker: CRM Industry group: Software Position: 537,300 Net weight: 1.924% Performance from 1/31/2018 - 1/31/2019: +33%
8. Alphabet (GOOGL)
Ticker: GOOGL Industry group: Internet content and information Position: 75,365 Net weight: 1.999% Performance from 1/31/2018 - 1/31/2019: -4.8%
7. UnitedHealth
Ticker: UNH Industry group: Healthcare Position: 338,500 Net weight: 2.155% Performance from 1/31/2018 - 1/31/2019: +14%
6. Facebook
Ticker: FB Industry group: Internet content and information Position: 609,841 Net weight: 2.395% Performance from 1/31/2018 - 1/31/2019: -11%
5. Apple
Ticker: AAPL Industry group: Consumer electronics Position: 986,150 Net weight: 3.868% Performance from 1/31/2018 - 1/31/2019: -0.6%
4. Amazon
Ticker: AMZN Industry group: E-commerce Position: 112,700 Net weight: 4.564% Performance from 1/31/2018 - 1/31/2019: +18%
3. Microsoft
Ticker: MSFT Industry group: Software Position: 1,865,100 Net weight: 4.59% Performance from 1/31/2018 - 1/31/2019: +10%
2. Alphabet (GOOG)
Ticker: GOOG Industry group: Internet content and information Position: 180,175 Net weight: 4.74% Performance from 1/31/2018 - 1/31/2019: -4.6%
1. Juul Labs
Hollis Johnson/Business Insider
Ticker: N/A Industry group: Electronic cigarette manufacturers Position: 898,438 Net weight: 5.283% Performance from 1/31/2018 - 1/31/2019: N/A
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