Slice of Stock

Private company

Who owns Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.)

One company in the researched set discloses a stake in Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.), none of it sized by anyone who discloses it. Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.) is private, so no 13F reports it: a 13F covers exchange listed positions only. These figures exist because each holder disclosed the stake in its own filings.

Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.) - Profile

Type
joint venture
Based in
Mexico

These four Mexican companies form the West Pharmaceutical Services affiliate group in Mexico, which makes and sells containment and delivery components for injectable medicines. Three are manufacturers at Cuernavaca in the state of Morelos: Pharma Tap runs rubber mixing and compression moulding, Pharma Rubber compression moulds rubber sleeves, and Aluplast handles rubber finishing, plastic injection moulding and aluminium seal manufacture and assembly, producing rubber stoppers, syringe plungers, aluminium seals and plastic containers and closures. The fourth, The West Company Mexico, is the group's trading and sales company based in Mexico City. All four are ISO 9001 certified and are held as equity method affiliates rather than consolidated operations, sharing West technologies and product lines for the Mexican and Latin American pharmaceutical market.

Source

Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.) files nothing with the SEC, so none of this comes from a filer record. The description was written for this site in August 2026 from West Pharmaceutical Services global locations, West Pharmaceutical Services Form 10-K for 2025 and Pharma Tap S.A. de C.V. company listing. The ownership figures below come from the holders' filings instead, and are sourced row by row.

Disclosed holders1in the researched set
Disclosed valuenot sized0 of 1 positions carry a figure
Most recent measurementundatedas of, not as reported
Visible to a 13FNoprivate company

The disclosed stakes

One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.

West Pharmaceutical Services, Inc.WSTfiled_10q_10knot sizednot sized49.0%

Where each figure comes from

A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.

What this page is not

It is not a complete register. It lists the holders who happen to be inside the researched set and disclosed the stake themselves. A private company can have many other shareholders, and nothing here rules them out: venture investors, founders and employees usually appear in no public filing at all. Percentages are of Mexico affiliates (The West Company Mexico, S.A. de C.V.; Aluplast, S.A. de C.V.; Pharma Tap, S.A. de C.V.; Pharma Rubber, S.A. de C.V.) where a holder stated one, and are missing where no holder did.