Below is a list of the 40 best performing Russell 3,000 stocks on a year-to-date basis through the third quarter of 2017. You’ll notice that a bulk of the names on the list of biggest winners are from the Biotech space.

Dynavax Tech (DVAX) ranks first with a YTD gain of 444%. Straight Path (STRP) ranks second at +432.79% but it’s in the process of getting acquired after a bidding war for the company’s valuable spectrum. Sangamo Therapeutics (SGMO), Calithera Biosciences (CALA), and Pieris Pharma (PIRS) round out the top five. Eight of the top nine are Biotech stocks, and then Weight Watchers (WTW) ranks tenth with a gain of 280%.

Because so many Biotech companies top the list of winners this year, below is a list of the 40 best performing non-Biotech names in the Russell 3,000.

There are 8 companies listed that are up more than 200% year-to-date, including Everi (EVRI), CAI Intl (CAI), Scientific Games (SGMS), and Ultra Clean (UCTT).Other notables on the list include Control4 (CTRL), Lumber Liquidators (LL), Cutera (CUTR), LendingTree (TREE), National Beverage (FIZZ), and Square (SQ).

If you have some time this week, browse through these names to see what the back-story is behind the big outperformance this year.