CIK: 0000913414 | San Francisco, CA
This book is plan-sponsor mandate money — collective investment trusts and separate accounts, largely for retirement plans, not publicly traded funds. It moves when a sponsor changes or funds a mandate, so the same index strategy can move here and not in the iShares book run by BlackRock Fund Advisors, whose flows are ETF creations and redemptions. BTC is also BlackRock's securities-lending agent. Same portfolio team and same stewardship team as BFA — the split is the client vehicle, not the investment decision, which is why some reports fold this entity into BFA. BlackRock itself does not: of the 8,204 holdings lines naming one of these two entities on BlackRock, Inc.'s Q2 2026 13F, none named both.
Often confused with BlackRock Fund Advisors
| Quarter | Form Type | Holdings | Value | Filed | SEC |
|---|---|---|---|---|---|
| 13F-HR | 3855 | $30.3B | 2017-02-10 | SEC ↗ | |
| 13F-HR | 3900 | $29.6B | 2016-11-08 | SEC ↗ | |
| 13F-HR | 3909 | $26.6B | 2016-08-10 | SEC ↗ | |
| 13F-HR | 3952 | $24.1B | 2016-05-10 | SEC ↗ | |
| 13F-HR | 3966 | $24.5B | 2016-02-11 | SEC ↗ | |
| 13F-HR | 3975 | $22.7B | 2015-11-13 | SEC ↗ | |
Q2 2015Amended | 13F-HR/A | 3933 | $25.5B | 2015-08-07 | SEC ↗ |
| 13F-HR | 3879 | $25.6B | 2015-05-13 | SEC ↗ | |
| 13F-HR | 3922 | $24.1B | 2015-02-09 | SEC ↗ | |
| 13F-HR | 3852 | $21.4B | 2014-10-29 | SEC ↗ | |
| 13F-HR | 3961 | $21.9B | 2014-08-06 | SEC ↗ | |
| 13F-HR | 3973 | $20.3B | 2014-05-02 | SEC ↗ | |
| 13F-HR | 3991 | $19.9B | 2014-02-12 | SEC ↗ | |
| 13F-HR | 3963 | $18.9B | 2013-11-12 | SEC ↗ | |
| 13F-HR | 3984 | $17.8B | 2013-08-13 | SEC ↗ |