Who owns American Water Works Co Inc, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Wellington Management Group LLP: 7.6% · 14,911,972 shares — Wellington Group Holdings LLP: 7.6% · 14,911,972 shares — Wellington Investment Advisors Holdings LLP: 7.6% · 14,911,972 shares
Vanguard Capital Management: 7.6% · 14,783,797 shares
3 more 5% stakes behind a free account
See every investor who has disclosed crossing 5% of American Water Works Co Inc.
Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of American Water Works Co Inc they hold. Together these 1364 managers report 117.16% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | $3.38B | 25,903,993 | 0.05% | 13.03% | December 31, 2025 |
| BlackRock, Inc. | $2.71B | 20,612,348 | 0.04% | 10.37% | June 30, 2026 |
1,362 more institutional holders behind a free account
See every manager reporting American Water Works Co Inc, how much of the company they hold, and how big the position is inside their own portfolio.
Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together the 500 largest funds we checked hold 40.42% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $815M | 0.04% | 3.12% | June 30, 2026 |
| VANGUARD 500 INDEX FUND | $666M | 0.04% | 2.55% | June 30, 2026 |
498 more funds behind a free account
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