American Water Works Company, Inc.

The full register, from 13F filings

The Register tab above is hand research: a dozen holders, each traced to the filing it came from. This asks the same question of the whole market for the quarter ended 31-mar-2026, where 1,123 managers reported a position. Broad where the research is deep, and shallow in the ways a 13F always is.

Built from 13F filings, which report US listed, long, US custodied positions only. A register from this source is a floor rather than a level: a holder's true position can be far larger, as BlackRock's ASML stake shows at 1.28m shares in a 13F against 26.3m in its 13G/A. Holdings held through derivatives, outside US custody, or below a manager's reporting obligation do not appear. Where a holder is marked as a family, its total sums several separate filing entities and describes something no single filing describes; the constituent entities and their share counts are listed so the total can be checked. That roll-up can legitimately exceed the family's own Schedule 13G, because a 13G is filed by one legal entity: Vanguard reports Alphabet through ten advisory entities, and The Vanguard Group Inc itself reported zero after its January 2026 disaggregation.

What a reader needs to know to read these numbers

• Confirmed this is the PARENT'S own filings, not a subsidiary's. CIK 0001410636 corresponds to 'American Water Works Company, Inc.', a Delaware corporation headquartered in Camden, NJ, NYSE ticker AWK, per the cover page of its own Q2 2026 10-Q (filed 2026-07-29, period 2026-06-30). American Water's regulated state operating subsidiaries (e.g. New Jersey American Water, Pennsylvania American Water) file their own rate cases with state utility commissions but do not separately file 10-Ks/10-Qs with the SEC under their own CIKs, so no subsidiary-filing mix-up was possible here; this was checked by confirming the registrant name and address on the cover page of the fetched 10-K, 10-Q and DEF 14A all read 'American Water Works Company, Inc.'.
• Holdings search: the Q2 2026 10-Q (awk-20260630.htm) and FY2025 10-K (awk-20251231.htm) were searched for 'equity method', 'unconsolidated', 'joint venture', 'noncontrolling interest', 'equity investment', 'venture', 'investment in', 'military services', and 'partnership'. Zero hits for equity method, unconsolidated, joint venture, noncontrolling interest, equity investment, and venture in both filings. No equity-method investees, joint ventures, or minority equity stakes were found.
• Subsidiaries examined: the FY2025 10-K describes American Water Works Service Company, Inc. and American Water Capital Corp. (AWCC, the wholly owned finance subsidiary) as wholly owned, and the regulated operating subsidiaries (New Jersey American Water, Pennsylvania American Water, and the rest of the state-by-state utility subsidiaries, plus Pepco/DPL/ACE-style analogues where applicable) as wholly owned; all are excluded from holdings per the brief. The former Homeowner Services Group (HOS) was sold in December 2021; the residual balance sheet item is a Secured Seller Promissory Note (a debt receivable, not an equity stake) which stepped down from $795 million to $0 as of 31 Dec 2025 per the 10-K, and is not a holding.
• The Company's Military Services Group (MSG) operates on 18 U.S. military installations under 50-year privatization contracts with the U.S. Army and other services. These are service and O&M contracts, not equity stakes in any entity, and are excluded from holdings per the brief's explicit instruction on military-base contract-services operations.
• On 26 Oct 2025 American Water entered an Agreement and Plan of Merger to combine with Essential Utilities, Inc. in an all-stock transaction (estimated pro forma ownership approximately 69% American Water shareholders / 31% Essential shareholders). As of the Q2 2026 10-Q (filed 29 Jul 2026), the merger was still pending, not yet closed. This is a proposed acquisition of American Water BY Essential's shareholders combining into the surviving company, not an equity stake American Water currently holds in Essential, so it is not recorded as a holding; noted here for completeness given the size of the pending transaction.
• The FY2025 10-K's deferred-compensation/benefit-plan fair value note lists 'Rabbi trust investments and other investments' at the parent and subsidiary levels but does not disclose any combined or per-counterparty equity-method balance; unlike Exelon's filing there was no single combined equity-method total to avoid mis-assigning here.
• holdings is an empty array: this is the sourced conclusion of the searches described above, not a default. American Water is structured as a pure regulated water/wastewater utility holding company with wholly owned operating subsidiaries and a military-contracts segment, and no equity-method investees, joint ventures, or minority strategic stakes were found in either the 10-K or the 10-Q.
• The proxy's 5%-holder table (Security Ownership of Certain Beneficial Owners) discloses Vanguard, BlackRock and State Street from stale Schedule 13G/A filings (Vanguard as of 31 Dec 2023, filed 13 Feb 2024, 24,022,075 sh / 12.3%; BlackRock as of 31 Dec 2024, filed 8 Jan 2025, 19,762,045 sh / 10.1%; State Street as of 31 Dec 2023, filed 30 Jan 2024, 11,038,713 sh / 5.7%). Per the brief, the register above uses fresh Q2 2026 13F data instead for all three, and these stale 13G figures are kept only in each row's method_note, not as the register values.
• Capital Group was checked in full: all three independent registrants (Capital World Investors CIK 0001422849, Capital International Investors CIK 0001562230, Capital Research Global Investors CIK 0001422848) filed 13F-HR for Q2 2026 and none holds CUSIP 030420103 as of 30 Jun 2026 (confirmed by direct text search of each info table). No Capital Group row is included because the position is genuinely zero this quarter, not because it was skipped.
• Vanguard: parent CIK 0000102909 filed Form 13F-NT (notice, no holdings) for Q2 2026, filed 2026-08-13, confirmed directly. 8 successor entities hold AWK and were summed into one row: Vanguard Capital Management LLC (CIK 0002100119), Vanguard Portfolio Management LLC (CIK 0002100121), Vanguard Fiduciary Trust Co (CIK 0000933478), Vanguard Asset Management, Ltd (CIK 0001680208), Vanguard Global Advisers, LLC (CIK 0001811242), Vanguard Investments Australia, Ltd. (CIK 0001550100), Vanguard Personalized Indexing Management, LLC (CIK 0001767306), Vanguard National Trust Co (CIK 0001984256). These 8 CIKs were enumerated from this project's own 13F-derived register at data/registers/AWK.json (period 31-Mar-2026) and each individually re-verified fresh against its own Q2 2026 (30-Jun-2026) 13F-HR filing rather than reused from that file.
• Register self-gate, computed exactly as the chart formula specifies from this final file: 11 rows. The insider aggregate ('Directors and current executive officers as a group', 158,021 shares) has one member (CEO John C. Griffith, 16,644 shares) rolling into it, so it is charted at its residual (158,021 - 16,644 = 141,377); every other row, including Griffith himself, counts at full value. Total: 26,219,908 (Vanguard) + 20,612,348 (BlackRock) + 14,911,963 (Wellington) + 11,901,865 (State Street) + 8,903,133 (GQG) + 5,012,560 (JPMorgan) + 5,223,191 (Geode) + 3,554,650 (Morgan Stanley) + 1,807,573 (T. Rowe Price) + 141,377 (officers/directors residual) + 16,644 (Griffith) = 98,305,212 shares against 198,728,989 shares outstanding = 49.47% of the company. This is above the brief's typical 25-45% band; the reason is that this file lists 11 register rows (versus a floor of 8), reaching down to a 1.79% institutional holder (Morgan Stanley) and a 0.91% one (T. Rowe Price), which is within the brief's allowance for going deeper than the top 8-12 when sourced positions are available.
• No stock split found: the Q2 2026 10-Q was searched for 'stock split', 'forward split' and 'reverse split' with zero hits. Share counts across all rows are on one basis (post any historical corporate actions, all read directly from Q2 2026 13F filings on the single CUSIP 030420103, common stock, no share classes).