Seilern Investment Management portfolio
Type not verifiedPortfolio as of Sep 30, 2026 (Q3 2026) · filed with the SEC on Oct 13, 2026 · data updated on Nov 5, 2026 · Q3 2026 13F (filing) ↗ · all its 13F filings ↗
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Seilern Investment Management reported a $771M portfolio of 24 positions to the SEC as of the end of Q3 2026. Its largest positions are MA, ISRG, TYL.
Sections with a free account
What changed this quarter
23 positions with a change (3 added to, 20 trimmed). 10 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- Veeva Systems−44%fewer sharesReduced7.1% → 6.6%
- Mastercard−16%fewer sharesReduced11.0% → 10.2%
- Microsoft−20%fewer sharesReduced5.4% → 6.1%
- UnitedHealth Group−18%fewer sharesReduced8.4% → 6.2%
- Adobe−24%fewer sharesReduced4.6% → 4.3%
- Intuitive Surgical+16%more sharesIncreased5.8% → 7.1%
- Cadence Design Systems+18%more sharesIncreased5.4% → 5.8%
- West Pharmaceutical Services−13%fewer sharesReduced6.3% → 5.8%
- Accenture−20%fewer sharesReduced2.6% → 3.1%
- Autodesk−9.5%fewer sharesReduced5.6% → 5.6%
The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.
Top holdings
- MastercardMA10.2%
- Intuitive SurgicalISRG7.1%
- Tyler TechnologiesTYL7.0%
- Veeva SystemsVEEV6.6%
- Edwards LifesciencesEW6.6%
- Idexx LaboratoriesIDXX6.5%
- UnitedHealth GroupUNH6.2%
- MicrosoftMSFT6.1%
- West Pharmaceutical ServicesWST5.8%
- Cadence Design SystemsCDNS5.8%
- AutodeskADSK5.6%
- AlphabetGOOGL5.3%
- AdobeADBE4.3%
- CopartCPRT4.2%
- ZoetisZTS4.1%
Portfolio by sector
- ● Health Care 47%
- ● Information Technology 32%
- ● Financials 11%
- ● Communication Services 5%
- ● Industrials 5%
Stakes above 5% (13D/13G)
Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.
How we classify it
Type not verified: we have not assigned a type because we found no document that is enough to tell. Most 13F filers are in this situation: we only review in depth those that meet the portfolio criteria.
Managers of a similar size
A 13F portfolio value between a third and three times this one, whatever the type of filer. It is not a comparison of what they hold.
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