So you know that feeling when you buy a stock and it goes up a little? Maybe 5%? 10% if you're lucky? Well, the traders who got in on Swarmer Inc.'s (SWMR) IPO this week are experiencing something... different.

The drone autonomy software company made its public debut on Tuesday and promptly shot up more than 500%. Not content with that, it decided Wednesday was also a good day for gains, closing the regular session up another 77% at $55. That's the kind of move that makes you check your screen for a decimal point error.

Now, in the after-hours session Wednesday, the party is getting a bit quieter. Shares were down about 3.84%, trading around $52.89. This is what finance people politely call "profit-taking" and what everyone else calls "cashing in your lottery ticket after it hits the jackpot."

The company announced late Wednesday that it had officially closed its initial public offering. The deal included the full exercise of the underwriters' option to buy more shares. The important number here is the price: $5 per share. That's the price the company and its early backers sold stock for to raise money.

From that $5 price, Swarmer said it netted about $14.7 million after paying the bankers and covering offering expenses. The company plans to use that cash to fund its operations, which includes expanding its capabilities, hiring more people, and working on integrating its software with drone manufacturers.

So what does Swarmer actually do? It's a defense technology company that, notably, supports operations in Ukraine. Its focus is on the software that makes drone swarms work—think autonomous coordination, integrating different unmanned systems, and using AI for collaborative missions. It's command-and-control software, but for robots.

Let's recap the price action, because it's a wild ride. The IPO was priced at $5. It opened for trading Tuesday at $12.50 and closed that first day at $31. Then came Wednesday's 77% rally to $55, followed by the after-hours dip. When a stock goes from $5 to $55 in two days, a little pullback is almost a form of market gravity.

For a brand-new public company in a hot sector like defense tech and drones, this kind of volatility isn't entirely surprising. The first few days of trading are often less about fundamental value and more about supply, demand, and sheer momentum. Some investors saw a chance for a quick score and took it. Now the market is figuring out what happens next.