Howmet Aerospace 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 1,447 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

• CIK lineage: CIK 0000004281 is the historic Alcoa Inc. / Arconic registrant. Checked the full EDGAR filing list via https://data.sec.gov/submissions/CIK0000004281.json: the entity name field now reads 'Howmet Aerospace Inc.', ticker HWM, exchange NYSE. The FY2020 10-K under this CIK is still filed as arnc-20201231.htm (Arconic name, period ended 31 Dec 2020); every 10-K and 10-Q from FY2021 onward is filed as hwm-*.htm. All filings used in this research (Q2 2026 10-Q, FY2025 10-K, 2026 DEF 14A) are current Howmet Aerospace filings, checked for both period and entity name before use, per the lineage warning in the brief.
• Stock split check: searched the FY2025 10-K for 'stock split', 'forward split' and 'reverse split'; all zero hits. No corporate action affecting the share-count basis was found. Common stock is a single class, par value $1.00 per share, per the Q2 2026 10-Q cover page. All register and company figures use this single, unadjusted basis; no restatement was needed.
• Holdings is an empty array, a sourced finding. Searched the Q2 2026 10-Q (https://www.sec.gov/Archives/edgar/data/4281/000000428126000025/hwm-20260630.htm) and the FY2025 10-K (https://www.sec.gov/Archives/edgar/data/4281/000000428126000012/hwm-20251231.htm) for 'equity method', 'unconsolidated', 'joint venture', 'equity investment', 'noncontrolling', 'minority interest' and 'affiliate'. Every term returned zero hits in the 10-Q. In the 10-K, only 'affiliate' returned hits (4), three of which are boilerplate (environmental liability language, aggregate market value of non-affiliate-held stock) and one is the general accounting policy sentence: 'Investments in affiliates in which Howmet Aerospace Inc. cannot exercise significant influence that do not have readily determinable fair values are accounted for at cost less impairment...'. This sentence names no investee and states no dollar balance; it also appears with no adjoining figure under 'readily determinable fair value' or 'cost method'. No balance sheet line, note, or dollar amount for any equity-method or cost-method investment was found in either filing. Howmet's own segment structure (Engine Products, Fastening Systems, Engineered Structures, Forged Wheels) is wholly owned and consolidated; the pension-plan asset table in the 10-K (private equity, hedge funds, etc.) is the pension trust's investment portfolio, not a corporate holding, and is excluded per the brief. Conclusion: Howmet Aerospace discloses no equity-method investments, joint ventures, or minority stakes in other companies as of either filing read.
• Vanguard case: Vanguard Group Inc (CIK 0000102909) filed a Form 13F-NT for Q2 2026, so per the Vanguard rule its successor filers (Vanguard Capital Management LLC and Vanguard Portfolio Management LLC) ARE the position and are summed into one 'The Vanguard Group' row of 44,684,707 shares. This is the 13F-NT case, not the family roll-up case.
• Capital Group: all three verified family entities (Capital World Investors, Capital International Investors, Capital Research Global Investors) were checked for Q2 2026. Only Capital Research Global Investors (CIK 0001422848) holds Howmet Aerospace, 2,440,644 shares. The other two hold GE Aerospace instead (confirmed by CUSIP, not merely a name-fragment miss), so the Capital Group register row is that single entity's figure, not a sum.
• Additional smaller Q2 2026 13F-HR filers checked but excluded from the register (below the 12th-ranked holder, Northern Trust at 3,741,760 shares, so outside the top 8 to 12 window): Schwab Investment Management 2,402,889 shares ($646,040,737); Franklin Resources 825,557 shares ($221,959,270); Wellington Management Group 772,953 shares ($207,816,143). Dodge & Cox (CIK 0000200217) was checked and holds no Howmet Aerospace position for Q2 2026 (CUSIP 443201108 absent; the filing instead holds GE Aerospace and Honeywell Aerospace under the 'AEROSPACE' fragment, confirming a real absence, not a spelling miss).
• T. Rowe Price thousands trap: T. Rowe Price Associates' Q2 2026 13F-HR infoTable reports the value column in thousands of dollars, not whole dollars as SEC 13F rules specify. Raw sum for the two CUSIP 443201108 lines was $3,630,800, which implied $0.27 per share, about 1000x below the ~$268.86 per-share cluster every other Q2 2026 13F row in this register implies. Rescaled by 1,000x to $3,630,800,000 ($268.83/share), consistent with the cluster. See the row's method_note.
• Register reconciliation on BlackRock and JPMorgan against the 2026 proxy. Howmet's 2026 proxy (Schedule 13G/A basis) lists only two holders above 5%: BlackRock, Inc. at 35,689,575 shares (8.9%, 13G/A as of 30 Sep 2025) and JPMorgan Chase & Co. at 30,955,301 shares (7.7%, 13G/A as of 30 Jun 2025). This register instead uses each manager's own Q2 2026 Form 13F-HR (30 June 2026 position date): BlackRock 45,819,158 shares (11.49%) and JPMorgan 18,561,518 shares (4.65%). BlackRock's 13F figure is materially higher than its 13G, consistent with a position increase since the 13G date; JPMorgan's 13F figure is materially lower than its 13G, consistent with a position reduction since the 13G date. Both the proxy's 13G figures and this register's 13F figures are recorded (13G figures in this note) rather than one overwriting the other. The Vanguard Group does not appear as a proxy 5% owner at all, consistent with the Vanguard 13F-NT reorganisation fragmenting its position across successor entities, none of which individually crosses the 5% Schedule 13G threshold on its own filing.
• Market cap ($115.30bn) and share price ($289.12) are stockanalysis.com figures as of the 17 Aug 2026 close. Cross-check: 398,801,399 shares x $289.12 implies approximately $115.30bn, consistent with the reported market cap.
• Self-gate check, computed the way the chart computes it (member rows at full value, only the container each rolls into reduced): 15 register rows (13 institutional Q2 2026 13F rows plus the two insider proxy rows), total 204,947,810 shares against 398,801,399 shares outstanding, or 51.4%. This is above the 25 to 45% expected band but inside the 15 to 55% bound, so no mandatory re-check was triggered. It reflects genuinely high institutional concentration at the very top of the register (BlackRock 11.49% plus Vanguard 11.21% alone total 22.7%), which is plausible for a widely held large-cap industrial and is not evidence of double counting: every institutional row's implied price per share (value/shares) clusters tightly at approximately $268.86 except the corrected T. Rowe Price row and MFS ($272.85, a small, immaterial deviation), and no holder appears in more than one row.