ValueAct Holdings, L.P.: BLACKROCK INC (BLK): Quarterly 13F Position History
As of Q1 2026, ValueAct Holdings, L.P. reported 546,100 shares of BLACKROCK INC (BLK), worth $525.2M and representing 9.2% of its 13F equity book. Quarter-over-quarter share count change: 148,900 (-21.4%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 546,100Shares Held (Latest Filing)
- $525.2MReported Market Value (Latest Filing)
- 9.2%Portfolio Weight (% of 13F Equity Book)
- 148,900Quarter-over-Quarter Share Change
- -$218.7MQuarter-over-Quarter Value Change
- 695,000Peak Reported Shares (Historical)
Recent initiation: ValueAct Holdings, L.P. first reported BLK on the Q4 2025 filing — fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 546,100 | 148,900 | -21.4% | $525.2M | 9.2% | $961.7 |
| Q4 2025 | 695,000 | — | — | $743.9M | 10.6% | $1070.3 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did ValueAct Holdings, L.P. first disclose a BLK position in 13F-HR filings?
ValueAct Holdings, L.P. first reported BLACKROCK INC (BLK) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was ValueAct Holdings, L.P.'s most recent quarter-over-quarter share-count change in BLK?
Between Q4 2025 and Q1 2026, ValueAct Holdings, L.P. reduced its BLK position by 148,900 shares (-21.4%), leaving 546,100 shares at a market value of $525.2M.
Does the implied price-per-share represent ValueAct Holdings, L.P.'s cost basis in BLK?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.