West Pharmaceutical Services (WST) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
West Pharmaceutical Services, Inc. (WST) insider buying and selling: no purchases, 6 sales
48 Form 4 Table I transactions filed with the SEC by West Pharmaceutical Services, Inc. insiders between 2026-02-12 and 2026-09-15 (15-month history): 0 open-market purchases and 6 sales, plus 42 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $2.8M by Favorite Annette F on 2026-09-08.
West Pharmaceutical Services insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, West Pharmaceutical Services insiders filed 6 sales worth $6.6M on the open market, and no purchases.
The biggest seller was Favorite Annette F (Sr. VP & Chief HR Officer): $6.3M in 5 sales, out of 2 different sellers.
The largest trade of the period was a sale of $2.8M on Sep 8, 2026, by Favorite Annette F (Sr. VP & Chief HR Officer). Form 4 on sec.gov (0000105770-26-000108).
Of the 6 sales, 3 (50%, $2.7M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 3 do not.
The last three months show 4 sales, against 2 in the three before. The latest sale from Sep 15, 2026.
Against its sector (Healthcare, 59 companies with an insider page on this site), over the same dates the median is 9 sales and 0 purchases on the open market. West Pharmaceutical Services has more sales than 21 of the other 58, ranks 38 of 59 by net dollars sold, and 19 of the 59 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with WST's sales, largest first. The full history is in the tool above, already searched.
See all 48 WST trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-09-08 | 2026-09-10 | Favorite Annette F | Sr. VP & Chief HR Officer | $2.8M | S — Open-market saleForm 4 footnoteF1 The price reported in Column 4 is a weighted average price. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price resulting in such weighted average price. | SEC |
| 2026-09-15 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $921k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-09-14 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $888k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-09-11 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $863k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-04-27 | 2026-04-29 | Favorite Annette F | Sr. VP & Chief HR Officer | $860k | S — Open-market saleForm 4 footnoteF1 The price reported in Column 4 is a weighted average price. | SEC |
| 2026-04-27 | 2026-04-29 | Winters Chad | VP, Chief Accounting Officer | $269k | S — Open-market saleForm 4 footnoteF1 The price reported in column 4 is a weighted average price. | SEC |
| 2026-08-11 | 2026-08-12 | Mcmahon Robert W. | SVP & Chief Financial Officer | $1.1M | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-09-08 | 2026-09-10 | Favorite Annette F | Sr. VP & Chief HR Officer | $694k | M — Option exercise | SEC |
| 2026-02-17 | 2026-02-19 | Green Eric Mark | President, CEO and Board Chair | $317k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-11 | 2026-02-12 | Mcmahon Robert W. | SVP & Chief Financial Officer | $308k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-04-27 | 2026-04-29 | Favorite Annette F | Sr. VP & Chief HR Officer | $235k | M — Option exercise | SEC |
| 2026-09-15 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $226k | M — Option exercise (scheduled 10b5-1) | SEC |
| 2026-09-14 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $224k | M — Option exercise (scheduled 10b5-1) | SEC |
| 2026-09-11 | 2026-09-15 | Favorite Annette F | Sr. VP & Chief HR Officer | $224k | M — Option exercise (scheduled 10b5-1) | SEC |
| 2026-04-27 | 2026-04-29 | Winters Chad | VP, Chief Accounting Officer | $155k | M — Option exercise | SEC |
| 2026-02-18 | 2026-02-19 | Green Eric Mark | President, CEO and Board Chair | $142k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-05-12 | 2026-05-14 | Campbell Shane Alden | SVP, Proprietary Segment | $68k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-17 | 2026-02-19 | Favorite Annette F | Sr. VP & Chief HR Officer | $37k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-20 | 2026-02-23 | Poussot Rodolphe Jean | SVP, Strategy & Corporate Dev | $31k | F — Tax withholding (shares surrendered for taxes) | SEC |
| 2026-02-17 | 2026-02-19 | Winters Chad | VP, Chief Accounting Officer | $12k | F — Tax withholding (shares surrendered for taxes) | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Feb 12, 2026 and Sep 15, 2026 there is not one open-market purchase of West Pharmaceutical Services, Inc.: 6 sales worth $6.6M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like West Pharmaceutical Services, Inc.'s is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| M | Option exercise | 15 | $1.8M |
| A | Grant or award | 14 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 13 | $2.0M |
| S | Open-market sale | 6 | $6.6M |
| Total | Everything filed in the period | 48 | $10.4M |
23 of the 48 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 17 distinct people or entities have filed West Pharmaceutical Services, Inc. transactions: none bought on the open market and 2 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Favorite Annette F | Sr. VP & Chief HR Officer | 14 | — | $6.3M (5) | 2026-09-15 |
| Winters Chad | VP, Chief Accounting Officer | 6 | — | $269k (1) | 2026-04-29 |
| Green Eric Mark | President, CEO and Board Chair | 4 | — | — | 2026-02-19 |
| Mcmahon Robert W. | SVP & Chief Financial Officer | 4 | — | — | 2026-08-12 |
| Poussot Rodolphe Jean | SVP, Strategy & Corporate Dev | 4 | — | — | 2026-02-23 |
| Witherspoon Charles | VP & Treasurer | 4 | — | — | 2026-02-23 |
| Campbell Shane Alden | SVP, Proprietary Segment | 2 | — | — | 2026-05-14 |
| Buthman Mark A | Director | 1 | — | — | 2026-05-06 |
Shown here are the 8 who moved the most money, out of 17. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Sep 2026: 0 purchases and 4 sales, worth $5.4M. 13 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 0 | $0 |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 2 | $1.1M |
| May 2026 | 0 | $0 | 0 | $0 |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 0 | $0 |
| Sep 2026 | 0 | $0 | 4 | $5.4M |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
West Pharmaceutical Services, Inc. (WST) analysis page →
Other Healthcare companies with insider trades
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How to read this data
3 of the 6 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. West Pharmaceutical Services has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Sep 15, 2026, and a Form 4 arrives up to two business days after the trade.
3 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.