Investors can enjoy huge gains if they back the right companies and give them time to evolve and flourish. Consider that a $2,500 investment made in Netflix stock a decade ago would now be worth roughly $15,500. If you invested that same $2,500 in e-commerce services innovator Shopify's stock just five years ago, your shares would now be worth a whopping $93,250. 

With seasons heading for a change, investors are weighing their next purchases and portfolio allocation moves. Read on for a look at three explosive stocks that are worth adding to your portfolio. 

A person looking at a tablet.

Image source: Getty Images.

1. Fiverr International

Fiverr International (FVRR -5.10%) operates a leading gig-economy labor platform and could be on track to deliver big returns for shareholders if it maintains a top position in the space. The long-term outlook for gig-marketplace services remains very strong, but the company's stock has seen volatile trading this year, and investors have an opportunity to buy shares at a substantial discount.

Fiverr's share price cratered after the gig marketplace published strong second-quarter results that also arrived with weaker-than-expected guidance. The company's shares trade down roughly 11.5% year to date and are off 48.5% from their 52-week high.

Sales in the second quarter surged 60% year over year to reach $75.3 million, but the market concentrated on the relatively disappointing target for revenue growth between 30% and 38% year over year in the third quarter. With some businesses returning to pre-pandemic office operations and relying less on remote labor, Fiverr is facing some challenging comparisons in the near term.

On the other hand, the company's positioning and long-term expansion potential remain very promising, and investors probably shouldn't get too hung up on the recent growth deceleration. Even with some projected slowdown, Fiverr is still growing at a healthy clip and should be able to shift into generating big earnings increases over the long term. 

2. Impinj

Impinj (PI -2.84%) makes radio-frequency identification (RFID) tags, sensors, and software. These technologies can function like a much more advanced version of the barcode system and keep track of and gather data from non-electronic objects. The company's solutions pave the way for improved item tracking, supply chain management, loss prevention at retail, and streamlining of manufacturing processes. And the business could play an important role in bringing everyday items into the burgeoning world of networked data.  

With pandemic conditions having disrupted key markets including retail, airline travel, and manufacturing, the company has faced some big headwinds over the last 18 months. However, there are signs that Impinj is starting to bounce back, and the business could be in the early stages of tapping into huge long-term growth trends. 

Sales jumped 78.7% year over year to reach roughly $47.3 million in the company's second quarter, and its revenue of $92.5 million across the first six months of the year is 24.5% higher than the sales it notched across last year's first two quarters. The business posted better-than-expected performance helped by RFID technologies for self-checkout used by a leading global retailer in Asia, and customers using the company for supply chain, logistics, and loss prevention.

There's room for new RFID uses in pretty much every industry under the sun, and Impinj is delivering technologies for a young market that has explosive potential. There's speculation involved in determining whether the company can make good on the opportunity at hand, but the tech stock could deliver fantastic returns if RFID applications continue to gain traction.

3. Roblox

Roblox (RBLX -1.18%) has established itself as an early leader in the virtual-world platform space sometimes referred to as the metaverse. To describe the company's namesake software as a "video game" would be underselling its massive scope. In many respects, Roblox is much closer to being a platform than a traditional game.

The broader Roblox world encompasses an incredible variety of different games, scenarios, items, and characters, and its users are creating new content all the time. Creators on the platform can generate substantial real-world earnings if players engage with their content, and this dynamic should help the company continue to attract new players and developers. 

The platform enjoys almost fanatical levels of engagement, and the company has estimated that somewhere in the range of 75% of U.S. children between the ages of 9 and 12 use the service. It's become a major social hub, and the business continues to grow at an incredible clip. Sales surged 127% year over year to reach $454.1 million in the second quarter, bookings jumped 35% year over year to $665.5 million, and free cash flow surged roughly 70% to hit $168 million. 

Roblox now has a market capitalization of roughly $51.5 billion and commands a valuation premium because it has built a hugely popular software platform capable of hosting a variety of evolving games and experiences. The platform has already proved to be quite sticky, and emerging crossover opportunities in media promotions, online retail, and augmented reality point to incredible long-term expansion potential.