XHS now has nearly $191 million in assets, $25 million of which have arrived this quarter. The ETF has added $54.1 million in new assets this year. Cigna, Aetna, Anthem, UnitedHealth and Humana combine for 10% of XHS’s weight. The ETF is up 15.8% this year.

IHF and XHS are not strangers to healthcare mergers and acquisitions. Earlier this year, UnitedHealth agreed to acquire Catamaran for $12.8 billion in cash.

In 2009, Express Scripts (NasdaqGM: ESRX) spent $4.7 billion to acquire WellPoint and followed up that deal with the $29 billion acquisition of Medco in 2012. [Healthcare ETFs Remain Sturdy]

Last month, shares of Quest Diagnostics (NYSE: DGX), the provider of healthcare diagnostic testing services, after it was rumored that that company could be a takeover target as well though chatter to that effect has since ebbed. Quest Diagnostics is 2.6% of IHF and 2% of XHS.

iShares U.S. Healthcare Providers ETF