The institutional buying is small in scale relative to market cap and lacks insider corroboration. Monitor next 13F cycle for whether the accumulation continued or was reversed, and watch for any insider Form 4 filings that could confirm conviction.
Executive Summary
Four institutional asset managers added to WST positions in Q3 2026, totaling $11.8M in net buying, while three smaller advisors trimmed $810K. The cluster is dominated by active managers but the aggregate dollar amounts are modest relative to WST's $27.7B market cap. No insider buying corroborates the institutional accumulation, and the 45-day reporting lag means positions may have changed since quarter-end.
Key Financial Metrics
Institutional Positions
Net institutional flow: $11.0M
▲ Buyers (4)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| Robeco Institutional Asset Management B.v. | ADD | +75.2% | $16.2M | $7.3M |
| Wasatch Advisors | ADD | +28.8% | $11.8M | $2.9M |
| Abn Amro Investment Solutions | ADD | +47.1% | $2.1M | $730.0K |
| Unisuper Management Pty | ADD | +31.5% | $3.4M | $898.0K |
▼ Sellers (3)
| Institution | Action | Change | Prev Value | Value Δ |
|---|---|---|---|---|
| Hb Wealth Management | TRIM | -33.9% | $1.7M | -$536.0K |
| Concurrent Investment Advisors | TRIM | -30.9% | $623.0K | -$179.0K |
| Farther Finance Advisors | TRIM | -28.7% | $363.0K | -$95.0K |
Key Facts
- 4 institutional buyers added $11.8M in net new positions during Q3 2026
- 3 institutional sellers trimmed $810K in aggregate
- Largest buyer: Robeco Institutional Asset Management added $7.3M (+75.2%)
- No open-market insider buying during the period (confluence score 13/100, divergent)
- All participants are active asset managers, not passive/index funds
Financial Impact
4 institutions accumulated $11.8M in new positions while 3 reduced holdings by $810K, for net buying of ~$11.0M — approximately 0.04% of WST's $27.7B market cap
Risk Factors
- 13F data is 45+ days stale; positions may have been unwound since quarter-end
- No insider buying to corroborate the institutional thesis
- Dollar amounts are immaterial relative to WST's $27.7B market cap
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-WST-2026-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 26, 2026 1d ago | 8-K | $394.73 | awaiting T+60 | — | — |
Oct 26, 2026 1d ago | Institutional Cluster | $394.73 | awaiting T+60 | — | — |
Jul 23, 2026 13w ago | 8-K | $355.48 $383.02 | ▲ +7.75% | ▲ +3.19% | — |
Jul 23, 2026 13w ago | Press Release | $355.48 $383.02 | ▲ +7.75% | ▲ +3.19% | — |
Jul 7, 2026 16w ago | Press Release | $356.08 $370.76 | ▲ +4.12% | ▲ +2.13% | — |
May 11, 2026 24w ago | 8-K | $311.82 $348.06 | ▼ −11.62% | ▼ −7.51% | — |
Apr 27, 2026 26w ago | Insider Cluster | $300.93 $358.41 | ▲ +19.10% | ▲ +14.59% | — |
Apr 27, 2026 26w ago | Insider Cluster | $300.93 $358.41 | ▲ +19.10% | ▲ +14.59% | — |
Apr 27, 2026 26w ago | Insider Cluster | $300.93 $358.41 | ▲ +19.10% | ▲ +14.59% | — |
Apr 27, 2026 26w ago | Insider Cluster | $300.93 $358.41 | ▲ +19.10% | ▲ +14.59% | — |
US Market Status
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