KLA 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 2,037 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

• KLA effected a ten-for-one stock split of its common stock on 11 June 2026, per the FY2026 10-K (period ended 30 June 2026, filed 6 August 2026). All figures dated 30 June 2026 or later in this file (shares_outstanding, the BlackRock/State Street/FMR/Geode/Morgan Stanley/JPMorgan 13F rows) are on the post-split basis. Figures dated before 11 June 2026 (Vanguard's 13F as of 31 December 2025, the September 2025 proxy's insider rows and its Vanguard/BlackRock principal-stockholder disclosures) are on the pre-split basis and are NOT directly comparable share counts to the post-split rows without a 10x adjustment, which this file does not perform since that would not be a filed number.
• shares_outstanding (1,306,546,783) is the 10-K cover-page figure, stated as of 3 August 2026 (post-split). The balance sheet separately shows 1,306,983 thousand shares issued and outstanding as of 30 June 2026, consistent with the cover-page figure.
• KLA does not file Form 13F. The complete EDGAR filing history (submissions JSON for CIK 0000319201, checked 17 August 2026) contains no 13F-HR or 13F-NT filing of any vintage, consistent with KLA not acting as an institutional investment manager.
• Holdings: the FY2026 10-K (period ended 30 June 2026, filed 6 August 2026) was fetched and searched in full for 'equity method', 'equity investment', 'non-marketable', 'measurement alternative', 'unrealized', 'strategic investment', 'joint venture' and 'privately held'. 'Equity method' and 'joint venture' returned zero hits; KLA does not appear to hold any equity-method investee or joint-venture interest. The filing does disclose one marketable equity security (a Japan-listed company, publicly traded on the Tokyo Stock Exchange since 5 April 2021), fair value $46.8 million as of 30 June 2026, cost $22.9 million; this is recorded as a holding with an undisclosed target name, since the 10-K never names the issuer and a web search did not identify it within the time budget.
• KLA also holds non-marketable equity securities in privately held companies, accounted for under the measurement alternative (cost minus impairment, plus or minus observable price changes), per the accounting-policy note. However, no dollar balance for this bucket is disclosed anywhere in the 10-K: it is not broken out on the balance sheet or in Note 4 'Financial Statement Components', which instead shows a residual 'Other non-current assets' line of $175.195 million (FY2026) / $154.370 million (FY2025) that mixes the non-marketable securities together with unspecified other items (EDSP assets, operating lease ROU assets and long-term accounts receivable are separately broken out in the same note, so the residual line is what remains). Because this is an unsplit combined figure that isn't even isolated to equity securities, no holding is recorded for privately held stakes, per the brief's instruction never to distribute or size from a bucket.
• Orbotech Ltd. is a wholly owned operating subsidiary (acquired 2019) and is excluded from holdings per the brief; it appears in this 10-K only as a source of product-line trade names.
• Vanguard disagreement, recorded rather than resolved. The register uses The Vanguard Group's own Form 13F-HR for the quarter ended 31 December 2025 (CIK 0000102909): 13,872,663 shares, pre-split. KLA's September 2025 proxy instead reports Vanguard at 13,499,554 shares (10.3 percent of 131,684,530 shares outstanding as of 10 Sept 2025), sourced to a 13F-HR filed 11 August 2025 for the quarter ended 30 June 2025, which is one quarter staler than the 13F used here. A Schedule 13G/A (Amendment No. 14) that Vanguard filed on 27 March 2026 reports 0 shares and 0 percent as of 13 March 2026, with a comment stating that on 12 January 2026 Vanguard underwent an internal realignment under which subsidiaries formerly deemed to share beneficial ownership with The Vanguard Group, Inc. now report separately on a disaggregated basis; this explains why Vanguard filed 13F-NT (notice only) rather than 13F-HR for the quarters ended 31 March and 30 June 2026. A separate Schedule 13G filed 30 April 2026 by 'Vanguard Capital Management' (same Malvern, PA address) reports 9,822,421 shares and 7.49 percent as of 31 March 2026; that percentage does not reconcile against either the pre-split or post-split share count and appears to use a different, unidentified denominator, so it is not used in the register.
• BlackRock disagreement, recorded rather than resolved. The register uses BlackRock, Inc.'s own Form 13F-HR for the quarter ended 30 June 2026 (CIK 0002012383): 126,198,653 shares, post-split. KLA's September 2025 proxy instead reports BlackRock at 11,584,889 shares (8.8 percent of 131,684,530 shares outstanding as of 10 Sept 2025, pre-split), sourced to a 13F-HR filed 12 August 2025 for the quarter ended 30 June 2025.
• KLA has a single class of common stock, $0.001 par value, per the FY2026 10-K cover page and balance sheet. There is no dual-class structure and no founder-control block; the CEO/Chairman roles are separated (Richard Wallace is CEO, Robert Calderoni is independent non-executive Chairman), and the individually named insiders each hold well under 1 percent of the company.
• All six 30 June 2026 13F rows imply a per-share price of roughly $301 to $302 (e.g. BlackRock: $38,075,395,547 / 126,198,653 = $301.87), except JPMorgan's common-stock lines, which imply about $278; this is each manager's own reported market value and was not adjusted.
• Market capitalisation of $266.17 billion is the figure published on the source page as of 14 August 2026.
• Percentages are computed by this research against a stated share count, not taken from a filing, except where a proxy or 13G already states its own percentage (noted separately above).
• Split ratio used throughout this file: KLA effected a TEN-FOR-ONE stock split of its common stock, effective 11 June 2026. Every share count in the register above is expressed on the POST-split basis for internal consistency, including the Vanguard 13F row (measured 31 December 2025) and the four proxy-sourced insider rows (measured 10 September 2025), both of which predate the split: their as-filed, pre-split figures are preserved in each row's method_note, and the post-split figure shown here is that pre-split figure multiplied by 10 (rounded to the nearest whole share where the source reported a fraction). No pct_of_company value was rescaled, since a uniform 10x scaling of both a share count and its denominator leaves the ratio unchanged.
• 'Vanguard Capital Management' filed a Schedule 13G on 30 April 2026 reporting 9,822,421 shares and 7.49 percent as of 31 March 2026, at the same Malvern, PA address as The Vanguard Group. That percentage does not reconcile against either the pre-split (approximately 131 million) or post-split (approximately 1.3 billion) share count, so its basis could not be established, and it is NOT used anywhere in this file. Do not add it as a second Vanguard row and do not sum it with the Vanguard Group 13F row above: the two filings' figures are not on a common, verified basis, and summing them would double count (or fabricate) Vanguard's true position.