ICLN was created on 2008-06-24 by iShares. The fund's investment portfolio concentrates primarily on theme equity. The ETF currently has 1451.44m in AUM and 101 holdings. ICLN tracks a tiered index of global companies involved in clean energy businesses.
ICLN invests in global clean energy companies, which are defined as those involved in the biofuels, ethanol, geothermal, hydroelectric, solar, and wind industries. Aside from holding companies that produce energy through these means, ICLN also includes companies that develop technology and equipment used in the process. Selected by the index committee, the fund is weighted by market-cap and exposure score subject to several constraints and reconstituted semi-annually. Prior to April 19, 2021, the index followed a more narrow methodology.