A. O. Smith Corporation

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 622 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

• DUAL CLASS STRUCTURE, one basis chosen: shares_outstanding (135,908,573) is the TOTAL of Class A Common Stock (25,861,359, unlisted, par $5) and Common Stock (110,047,214, NYSE: AOS, par $1), both from the 10-Q cover page dated 28 Jul 2026 (period 30 Jun 2026). Class A is convertible at any time at the holder's option into Common Stock on a share-for-share basis (DEF 14A). Every register row's `shares` and `pct_of_company` is stated on this combined, total-company basis. Naming trap flagged by the brief and confirmed here: the LISTED, widely held class trading as NYSE:AOS is literally called 'Common Stock', while the unlisted, family-controlled class is 'Class A Common Stock'. All institutional 13F rows hold Common Stock only (CUSIP 831865209); their percentage of Common Stock alone (stated in each row's method_note) is meaningfully higher than their percentage of the whole company, since Common Stock is only 81.0% of total shares outstanding.
• VOTING STRUCTURE is NOT a simple votes-per-share multiplier and is kept out of shares/pct_of_company per the brief. Per the 2026 DEF 14A: Class A Common Stock is entitled to 1 vote per share on every matter. Common Stock is entitled to 1 vote per share only for the election of Common Stock directors, and just 1/10 vote per share on all other matters. Directors are elected by separate class votes: Common Stock holders elect, as a class, 33 1/3% of the Board; Class A Common Stock holders elect the remaining (majority) 66 2/3%. The Smith Family Voting Trust holds 96.96% of Class A (see its row), so it effectively controls the separate Class A director election outright and, per the notes on that row, an estimated ~68% of total voting power on non-director matters. This is a materially different (and more complex) mechanism than Ralph Lauren's flat 10-votes-per-share Class B; `share_classes.votes_per_share` is recorded as 1 for both classes here because AOS's scheme cannot be reduced to one multiplier per class without losing the director/other-matters distinction, which is instead spelled out in full in the Smith Family Voting Trust row's method_note.
• Holdings side: searched A. O. Smith's most recent 10-Q (period 30 Jun 2026, filed 30 Jul 2026) and most recent 10-K (fiscal year ended 31 Dec 2025, filed 10 Feb 2026, plus Exhibit 21 subsidiaries list) for 'equity method', 'joint venture', 'unconsolidated', 'non-marketable', 'equity investment', 'noncontrolling', 'minority interest', 'investment in', 'affiliate', '20 percent owned', '50 percent owned', 'less than wholly'. ZERO hits for equity method, joint venture, unconsolidated, non-marketable, equity investment, noncontrolling, or minority interest in either filing. The only 'investment in' hit is an FX-hedge disclosure ('hedges of a net investment in non-U.S. subsidiaries'), not an equity stake. Exhibit 21 lists 29 subsidiaries by name and jurisdiction only, with NO ownership-percentage column: every entity is an A. O. Smith-branded wholly owned subsidiary, including all China entities (A. O. Smith (China) Water Heater Co., A. O. Smith (China) Water Products Co., A. O. Smith (China) Environmental Products Co., A. O. Smith (Shanghai) HVAC Co., A. O. Smith (China) Investment Co.) and the India entity (A. O. Smith India Water Products Private Limited), plus the Pureit business acquired outright from Unilever PLC in 2024 (10-K MD&A: 'acquisition of Pureit'). No joint-venture partner or third-party-named entity appears anywhere. Conclusion: despite operating in China and India, A. O. Smith holds no material identifiable equity stake in any other listed or private company as of these filings; holdings is legitimately empty. This is a bare name list with no percentage column, treated per the brief as a genuine negative (the Labcorp/Darden/Nordson pattern), not evidence of an unexamined format.
• Proxy 5%-owner table checked for the Allegion-style gap (a family sweep found but the proxy's own table omitting it): NOT present here. The 2026 DEF 14A's Common Stock 5%-owner table lists exactly Vanguard Group (12.61%, stale, as of 31 Dec 2025), BlackRock (6.00%, stale), State Street (5.20%, stale), and FMR LLC (5.10%, stale); the fresh Q2 2026 13F sweep in this file confirms all four are real, current holders (each refreshed upward per its own row) and finds no additional 5%+ institutional holder the proxy missed. Capital Group (all 11 SEC-registered Capital Group entities individually checked: Capital Research & Management Co CIK 0000017283 and Capital Group Companies Inc CIK 0000732812 and Capital Group International Inc CIK 0000949308 filed 13F-NT for Q2 2026; the 8 remaining registrants (Capital Research Global Investors, Capital World Investors, Capital International Investors, Capital International Inc/CA/, Capital International Sarl, Capital International Ltd/CA/, Capital Group Investment Management Pte, Capital Group Private Client Services) each filed a 13F-HR and NONE holds any A. O. Smith position, CUSIP 831865209 not present in any of the 8 information tables) and T. Rowe Price Investment Management (CIK 0001897612, checked, zero) hold NOTHING and are correctly absent from both the proxy and this file's register; recorded as a note per the brief's rule that a holder checked and found at zero is a note, not a null row.
• data/registers/AOS.json (31 Mar 2026 snapshot, truncated top-40, used only to identify the Vanguard entity list, never for share figures) shows Invesco Ltd. (4,729,446 sh), Impax Asset Management Group plc (4,278,219 sh), American Century Companies Inc (4,215,238 sh), Geode (3,939,106 sh) and Morgan Stanley (3,580,107 sh) among its next-largest names after the top four; it omits Capital Group and T. Rowe Price entirely, consistent with the known incompleteness the brief warns about. Invesco and Geode were independently refreshed to Q2 2026 13F-HR figures and included as register rows above; Impax, American Century and Morgan Stanley were not individually refreshed and are listed in unknowns.
• Self-gate computed from this final file, using the chart's own arithmetic: 9 register rows. The 'All 24 Directors, Nominees and Executive Officers as a Group' row is an aggregate with NO separately listed member row rolling into it (Mark D. Smith's 274,452 Class A shares are inside the group total but are not broken out as their own row), so per the gate formula it counts at its FULL filed value (713,807). The Smith Family Voting Trust sits outside this group (trustees disclaim beneficial ownership of Trust shares) and also counts at full value with no reduction. Total = 26,155,686 (Smith Family Voting Trust) + 15,355,181 (Vanguard family) + 10,417,815 (Fidelity/FMR) + 8,056,801 (BlackRock) + 6,581,486 (State Street) + 5,535,312 (Invesco) + 3,358,722 (Geode) + 208,142 (T. Rowe Price Associates) + 713,807 (directors/officers group) = 76,382,952 shares. Divided by shares_outstanding 135,908,573 = 56.20% of the company, on the combined Class A + Common Stock basis.
• This 56.20% figure sits just above the brief's 55% flag threshold and was checked for the three usual causes of an inflated register before shipping: (1) mixed instrument: every institutional row is the same CUSIP 831865209 Common Stock, read directly from each holder's own Q2 2026 13F-HR, cross-validated by a tight implied-price band of $62.62-$62.73/share across all seven institutional filers (including the thousands-corrected T. Rowe Associates row), consistent with the live $63.80 Nasdaq quote on 19 Aug 2026 seven weeks later; (2) mixed basis: the Smith Family Voting Trust row and the directors/officers group are both stated on the same combined-class economic basis as every other row, with the two-track voting scheme kept entirely out of the shares field; (3) double counting: the Trust and the directors/officers group are legally and factually distinct per the proxy's own disclaimer language (trustees hold no beneficial interest in Trust shares), Vanguard is one summed family row (parent filed 13F-NT, successors are the position, no double-add), and Capital Group plus T. Rowe Investment Management were checked and found to hold zero, contributing no phantom shares. The elevated total reflects two genuine, sourced features stacking: a founder-descendant trust holding 19.25% of the combined economic denominator while controlling the Board majority through a super-voting Class A structure, plus unusually deep institutional ownership of the separately traded Common Stock (seven filers summing to well over a third of the company). This is the same founder/dual-class shape the brief anticipates running above the normal band, as with Ralph Lauren.