RTX 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 3,398 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

• RTX Corporation's SEC filer, CIK 0000101829, was previously named Raytheon Technologies Corp (from the April 2020 merger of Raytheon Company and United Technologies Corp until the RTX rename effective 25 July 2023) and, before that, United Technologies Corp /DE/. Older filings referenced in this file (for example the 10-K and 10-Q accession numbering) sit under the same CIK and may still carry the earlier corporate name internally.
• RTX does not itself file Form 13F. Its EDGAR submissions feed (CIK 0000101829, checked 17 August 2026) contains no 13F-HR or 13F-NT of any vintage, consistent with RTX not acting as an institutional investment manager.
• Holdings is empty and that is the sourced finding, not a gap. The FY2025 Form 10-K (period ended 31 December 2025, filed 6 February 2026) and the Q2 FY2026 Form 10-Q (period ended 30 June 2026, filed 23 July 2026) were both searched in full for 'equity method', 'unconsolidated', 'joint venture', 'non-marketable', 'measurement alternative', and 'investments in and advances to affiliates'.
• RTX's accounting policy note confirms it holds (a) equity-method investments in entities where it has significant influence and (b) strategic, measurement-alternative investments in early-stage technology companies (equity securities without readily determinable fair value, sometimes convertible debt). Both categories are presented inside the single combined 'Other assets' balance sheet line ($4,672 million at 31 December 2025, $5,297 million at 31 December 2024), with no per-investee or per-category dollar breakout anywhere in the 10-K or 10-Q. Per the brief's rule against distributing a combined bucket across members, no individual holding is recorded from this figure.
• Two named joint ventures appear in the text but neither carries a disclosed ownership percentage or value: Thales-Raytheon Systems (TRS), a Middle East defense joint venture with Thales discussed only in the context of a DOJ deferred prosecution agreement and related legal proceedings, and an unnamed 'Collins Aerospace joint venture' referenced only in a China-sanctions risk factor.
• Pratt & Whitney holds a 49.5 percent ownership interest (61 percent program share) in International Aero Engines AG (IAE, with MTU Aero Engines and Japanese Aero Engines Corporation) and a 59 percent ownership interest in International Aero Engines, LLC (IAE LLC), per FY2025 10-K Note 15. Both are named, sized minority-ownership joint ventures, but both are fully consolidated because Pratt & Whitney is the variable-interest-entity primary beneficiary, so they are excluded from holdings under the brief's exclusion of consolidated entities even though legal ownership is below 100 percent. Combined VIE assets were $15,894 million and liabilities $16,381 million at 31 December 2025, not attributable to IAE alone and not an equity-holdings figure.
• Register cross-check: RTX's 2026 proxy statement's own '5% owners' table (as of 31 December 2025) reports Vanguard at 124,986,171 shares / 9.3%, matching the Vanguard 13F-HR figure used here exactly. It reports BlackRock at 104,920,146 shares / 7.8% and State Street at 91,884,588 shares / 6.8%, both as of 31 December 2025; this file instead uses BlackRock's and State Street's own, more recent Form 13F-HR for the quarter ended 30 June 2026 (110,528,494 and 95,417,318 shares respectively). The difference reflects six months of trading, not a data conflict.
• The proxy states a State Street subsidiary is trustee for the RTX Savings Plan Master Trust and that other State Street subsidiaries separately provide RTX with investment management services (RTX paid State Street and its subsidiaries approximately $7.4 million in 2025 for trustee, investment management, and administrative services). It similarly states BlackRock acted as an investment manager for certain assets within RTX's global pension and employee savings plans during 2025 and was compensated for that role. Neither disclosure gives a share count for the plan-trustee or pension-manager portion separately from each firm's ordinary asset-management book, so both remain single 'index' rows here rather than being split into an esop_trust row.
• RTX has a single class of common stock, $1 par value, one vote per share; no dual-class structure and no founder or family control block.