The Global X Social Media Index ETF (NasdaqGS: SOCL) has allocated 4.5% of its weight to newly public social media firm Twitter (NYSE: TWTR), making the stock the ETF’s eleventh-largest holding.

At a weight of 4.5%, Twitter is just behind Yandex (NasdaqGM: YNDX), the Google (NasdaqGM: GOOG) of Russia, in SOCL’s lineup. SOCL joins the Renaissance IPO ETF (NYSEArca: IPO) as the first ETF’s to add Twitter to their respective lineups. [Twitter ETF Update]

Twitter is IPO’s tenth-largest holding, but its weight in that ETF is slightly more than half what it is in SOCL. [Twitter Enters IPO ETF as Top-10 Holding]

After surging almost 5% on Thursday, Twitter has a market value of $24.3 billion. That is more than Zynga (NasdaqGM: ZNGA), Yelp (NYSE: YELP) and Groupon (NasdaqGM: GRPN), SOCL’s seventh- through ninth-largest holdings, combined.