What's better than momentum? Mo' momentum.

Let's take a closer look at five of this past week's biggest scorchers.

Company

April 20 Weekly Gain My Watchlist
Human Genome Sciences (Nasdaq: HGSI) $14.36 100% Add
Endocyte (Nasdaq: ECYT) $7.41 95% Add
Stratasys (Nasdaq: SSYS) $47.85 33% Add
Vringo (AMEX: VRNG) $3.95 30% Add
Sequenom (Nasdaq: SQNM) $5.01 26% Add

Source: Barron's.

Human Genome Sciences doubled after rebuffing an unsolicited buyout offer. Even though it was a longtime partner of the company with the surprise bid, Human Genome Sciences wants to see if anyone else is willing to raise the offer of $13 a share that it turned down.

Endocyte nearly doubled after striking a licensing deal with Merck for its lead cancer-tackling product, vintafolide.

Stratasys climbed after the maker of 3-D printers moved to acquire privately held Israeli peer Objet. The combination will make Statasys a bigger player in the expensive but promising realm of 3-D printing.

Vringo soared 30% after a filing revealed that Mark Cuban acquired a 7.4% stake in the company. Vringo is a small app maker that generated just $714,000 in revenue last year. However, last month it struck a deal to merge with a company that holds a few patents from former dot-com darling Lycos.

Sequenom moved higher after announcing an agreement with health care cost-management provider MultiPlan to offer its genetic analysis test for pregnant women at increased risk for fetal aneuploidy.

More winners for you
It was a great week for these five stocks. If you want to get an early read on some of tomorrow's major gainers, here's a special report on three hidden winners in a booming industry. The report is free -- like this article -- but it won't be around forever, so check it out now.