Vanguard bought a lot more in Q1. Maybe in the offering or from the market?

Stockholder: The Vanguard Group, Inc.
Stake: 2.56%
Shares owned: 1,598,802
Total value ($): 1,854,610
Shares bought / sold: +512,451
Total change: +47.17%

This is not the...
Vanguard Total Stock Market Index that has 1,018,873 shares and a 1.63% stake

This is not the...
Vanguard Extended Market Index Fund that has 573,428 shares and a 0.92%
https://investor.vanguard.com/mutual-funds/pr...o-holdings

This is not the...
Vanguard Invt. Fds. ICVC - US Equity that has 18,007 shares , that recently added +15,523


Vanguard Group Inc is an investment fund managing more than $3.69 trillion ran by Christine Buchanan. There are currently 4288 companies in Mrs. Buchanan’s portfolio. The largest investments include Apple Inc and Microsoft, together worth $295 billion.

See for yourself:

https://www.sec.gov/Archives/edgar/data/10290...otable.xml