TransDigm Group Incorporated

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 1,087 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

• Holdings side: TransDigm acquires aerospace component businesses almost entirely outright, and the FY2025 10-K and the Q3 FY2026 10-Q (period ended 27 Jun 2026, filed 4 Aug 2026) were both searched in full for 'equity method', 'unconsolidated', 'noncontrolling interest', 'minority interest', 'retained interest', 'joint venture', 'variable interest entity', 'investments in', 'non-marketable', 'cost method', 'divest' and 'equity securities'. There is no equity-method investee, no joint venture, and no retained minority stake from a divestiture anywhere in either filing: 'equity method', 'unconsolidated', 'minority interest', 'retained interest', 'joint venture' and 'variable interest entity' all returned zero hits in both filings, so the brief's Roper/Indicor-style lead (a retained minority stake from a partial divestiture) is CONFIRMED ABSENT for TransDigm as of the latest filings. What the search did surface is a different, positive finding under the brief's Nucor/Moody's ICRA precedent: TransDigm's 7 Apr 2026 acquisition of approximately 95% of Jet Parts Engineering and approximately 96% of Victor Sierra Aviation Holdings (a combined ~$2.2bn cash deal) leaves 5% and 4% respectively held by each target's own management under redeemable put/call options through fiscal 2033 (10-Q Note 14, 'Redeemable Noncontrolling Interests'). TransDigm consolidates both but is not the SOLE owner of either, so both are recorded as holdings at their disclosed percentages; the combined (not split) dollar figures mean value_usd is null on both per the brief's combined-balance rule. A smaller, pre-existing $7 million (FY2025) to $9 million (Q3 FY2026) noncontrolling-interest balance appears on the balance sheet that predates JPE/VSA and is not itemized by name in the sections searched; it is too small and unidentified to model as a holding and is listed in unknowns.
• Share basis and the inverted thousands trap: TransDigm's real share price is genuinely in the four figures. stockanalysis.com quoted $1,237.80/share live on 18 Aug 2026 (1:36pm EDT), giving a market cap of $68.42bn against 55,276,525 shares outstanding taken from the Q3 FY2026 10-Q cover page (period ended 27 Jun 2026, filed 4 Aug 2026), which states shares outstanding of 55,276,525 as of 31 Jul 2026. Every fresh Q2 2026 (30 Jun 2026) Form 13F-HR filer checked for this file, across 16 distinct filing entities plus the 8-entity Vanguard family and 6-entity Capital Group family (30+ underlying CIKs), implies the SAME per-share price cluster of $1,332.0x, which is a genuinely four-figure number and matches the real stock price at that quarter-end (a decline from ~$1,332 on 30 Jun 2026 to $1,237.80 on 18 Aug 2026 is a plausible seven-week price move, not a units problem). The one place the usual thousands trap DID appear in its normal (non-inverted) form was T. Rowe Price: both required CIKs (Associates 0000080255 and Investment Management, Inc. 0001897612) filed their info table dollar values in thousands, implying $1.33/share raw; rescaled by 1000 both align to the $1,332/share cluster. This is the opposite failure mode from the brief's usual warning: here a filer under-reporting by 1000x would have looked 'too small to be believable' rather than 'too big', and the fix is the same rescale in either direction.
• Fiscal periods used: TransDigm's fiscal year ends in late September. The latest 10-K on file is for fiscal year 2025 (period ended 30 Sep 2025, filed 12 Nov 2025). The latest 10-Q on file is for fiscal Q3 2026 (period ended 27 Jun 2026, filed 4 Aug 2026); fiscal Q4 2026 will close around 26 Sep 2026 and had not been filed as of 18 Aug 2026. Both filings were searched for 'stock split', 'forward split' and 'two-for-one' with zero hits; TransDigm has never split its stock. It instead pays large, irregular SPECIAL cash dividends, which do not change the share count: $90.00/share declared 20 Aug 2025 and paid (with dividend equivalents) for a total cash cost of approximately $5,232 million in September 2025, and $75.00/share paid 18 Oct 2024. These were confirmed as dividends, not splits, and do not affect shares_outstanding.
• Register: the proxy's own 5%-holder table (record date 9 Jan 2026, itself citing stale 13F filings as of 30 Sep 2025) names four holders: The Vanguard Group, Inc. 6,790,800 shares (12.0%), Capital International Investors 6,489,193 shares (11.5%), Capital World Investors 3,938,687 shares (7.0%) and BlackRock, Inc. 2,918,533 shares (5.2%). Per the brief, all are superseded here by fresher Q2 2026 (30 Jun 2026) Form 13F-HR figures, both individually and at the family level: Capital Group's full 6-entity family (not just the two named in the proxy) sums to 12,558,892 shares (22.72%), Vanguard's full 8-entity family to 6,814,208 shares (12.33%), and BlackRock to 4,871,505 shares (8.81%), all well above the proxy's stale, partial figures.
• Self-gate check, computed with the chart's own arithmetic on the FINAL file (member rows count at full value; only the aggregate they roll into is reduced by the member's value): 16 register rows (14 institutional 13F rows plus 2 insider rows). Members map: W. Nicholas Howley's 630,539 shares roll into the 15-person officers/directors group. The group's raw 1,843,619 shares is reduced to a residual of 1,213,080 (1,843,619 minus 630,539); every other row, including Howley's own row, counts at full value. Total = 36,628,400 shares against 55,276,525 shares outstanding, or 66.26%.
• That 66.26% is above the 25-45% range this project's files have typically landed in and above the 55% ceiling the brief flags as a likely double-count. It was investigated rather than shipped as-is. First, the per-share cluster check ($1,332.0x per share across essentially every institutional filer for the 30 Jun 2026 quarter, corrected for the T. Rowe thousands convention) shows no unit or valuation-date mismatch across any of the 14 institutional rows. Second, an external cross-check: stockanalysis.com's Statistics page reports TransDigm's aggregate institutional ownership (summed across every 13F filer, not just the 14 largest here) at 96.72% of shares outstanding as of 18 Aug 2026, itself a known artifact of aggregators double-counting shares reported by both a manager and the sub-advisers/funds it reports through, but it confirms institutional concentration in TDG is extreme in general, not an artifact specific to this file. TransDigm has an unusually small share count (55.3 million) for a $68bn market cap, driven by a four-figure stock price and 26 years of concentrated ownership by a handful of very large, high-conviction managers (Capital Group alone holds 22.72%, more than Vanguard). The concentration is a genuine feature of TransDigm's ownership base rather than a data error.
• The same stockanalysis.com Statistics page reports insider ownership at only 0.40%, versus 3.34% for the proxy-derived officers/directors group used in this file. The gap is consistent with definitional differences: the proxy's 3.34% (recomputed on this file's denominator) includes 1,207,218 shares of stock options exercisable within 60 days, roughly two-thirds of the group's total, which a typical aggregator's narrower 'shares directly held per Form 4' insider metric likely excludes; this was not independently reconciled beyond noting the plausible explanation.