Andreas Halvorsen · William von Mueffling
what they both own
Both Andreas Halvorsen (Viking Global Investors) and William von Mueffling (Cantillon Capital Management) hold 7 of the same stocks per their latest 13F filings — a Jaccard overlap of 10.8% across portfolios of 37 and 35 positions. Combined position weight in shared names: 47.4% of each investor's portfolio capacity.
Shared positions, ranked by joint conviction
Joint conviction = Andreas Halvorsen's portfolio weight + William von Mueffling's portfolio weight. A stock that both investors size heavily ranks higher than one both hold marginally. Position weight reflects each investor's most recent 13F filing (45-day SEC lag applies; filings can be 1-3 months old).
| Ticker | Halvorsen | Mueffling | Joint | ConvictionScore |
|---|---|---|---|---|
| TSM | 4.2% | 5.9% | 10.1% | 0 |
| GOOGL | 1.9% | 7.4% | 9.3% | 0 |
| V | 5.4% | 3.6% | 9.0% | 0 |
| ICE | 2.1% | 3.2% | 5.3% | 0 |
| MSFT | 2.4% | 2.9% | 5.3% | 0 |
| TMO | 2.3% | 2.6% | 4.9% | 0 |
| AON | 1.0% | 2.5% | 3.5% | 0 |
Compare individually
Data note. Position percentages are derived from each investor's most recent SEC Form 13F filing (45-day lag), filtered to disclosed long positions only. 13F filings exclude short positions, options (mostly), foreign-domiciled holdings, and positions below the reporting threshold. Joint conviction is a descriptive sum, not a recommendation. Per HoldLens compliance: this page is factual portfolio comparison, not investment advice. Always verify against the source filing before acting.