BlackRock

BlackRock is based in New York. iShares ETFs and institutional index mandates make it one of the largest holders of public equities and bonds, alongside Vanguard and State Street, because the money is indexed rather than because the firms pick stocks together.

Aladdin is software. Insurers, pensions, and other asset managers run risk, accounting, and sometimes trading workflows on it, and those workflows are customized enough that a replacement is a multi-year conversion.

ETF creation and redemption runs through authorized participants and the index a fund tracks. A company that enters or leaves an index sees mechanical buying from iShares and from Vanguard and State Street funds that follow the same benchmark, which is index construction, not a joint trading plan.

iShares distribution through brokerages and advisors is the retail and institutional ETF shelf.

Aladdin renewals lock risk operations at clients who may also be competitors in asset management.

Index tracking means flows follow benchmark rules that BlackRock does not solely write.

A retirement saver in an iShares fund depends on the tracking error and the fee, and can usually sell the ETF.

A risk team that has coded Aladdin portfolios cannot move that system on a quarter's notice.