Mawer Investment Management portfolio
Investment firmPortfolio as of Jun 30, 2026 (Q2 2026) · filed with the SEC on Aug 7, 2026 · data updated on Nov 5, 2026 · Q2 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.
Mawer Investment Management reported a $14.7 bn portfolio of 140 companies (142 positions, counting each share class separately) to the SEC as of the end of Q2 2026. Its largest positions are GOOG, AMZN, MSFT. During the quarter it exited OSI Systems.
Sections with a free account
What it reported after the quarter end (Q2 2026)
The 13F shows the portfolio as of Jun 30, 2026. Since then Mawer Investment Management has filed these own trades with the SEC (Form 4, when it owns more than 10% of a company or holds a role in it) and stakes above 5% (13D and 13G). It is not everything it did: only what it must report before the next 13F.
What changed this quarter
150 positions with a change (28 new, 36 added to, 74 trimmed, 12 sold). 12 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- NVIDIA+224%more sharesIncreased1.1% → 4.2%
- Amphenol−41%fewer sharesReduced3.3% → 2.8%
- Marsh & Mclennan Companies−46%fewer sharesReduced3.9% → 2.1%
- Microsoft−27%fewer sharesReduced5.5% → 4.3%
- Alphabet−1.3 ppof portfolioReduced6.1% → 6.5%
- OSI Systems−1.1 ppof portfolioSold out1.1% → —
- Amazon.com−17%fewer sharesReduced4.9% → 4.9%
- American Electric Power+71%more sharesIncreased1.1% → 2.1%
- Cencora+44%more sharesIncreased2.1% → 2.9%
- Ferguson Enterprises−78%fewer sharesReduced1.0% → 0.2%
- Booking Holdings−48%fewer sharesReduced1.5% → 0.9%
- Medpace Holdings−40%fewer sharesReduced1.4% → 1.0%
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
- AlphabetGOOG6.4%
- Amazon.comAMZN4.9%
- MicrosoftMSFT4.3%
- ShellSHEL4.2%
- NVIDIANVDA4.2%
- VisaV4.0%
- WatersWAT3.1%
- CencoraCOR2.9%
- AmphenolAPH2.8%
- AonAON2.6%
- AerCap HoldingsAER2.4%
- Wells FargoWFC2.4%
- Northrop GrummanNOC2.3%
- Berkshire HathawayBRK/A · BRK/B2.3%
- American Electric PowerAEP2.1%
“Since”: first quarter of the current run, unbroken until today. In the details, prices are the quarter-end prices of the quarters in which it added shares, per the 13F. The manager may have bought at any price within each quarter; the SEC only publishes the value at quarter end.
Portfolio by sector
- ● Financials 27%
- ● Information Technology 19%
- ● Health Care 13%
- ● Industrials 13%
- ● Communication Services 10%
- ● Consumer Discretionary 8%
- ● Energy 4%
- ● Utilities 4%
- ● Consumer Staples 2%
- ● Materials 1%
How its portfolio changed (8 quarters)
Q2 2026: 142
Q2 2026: 39%
Q2 2026: 14.8%
Traded turnover: the weight it bought plus the weight it sold in the quarter, divided by two, excluding price moves. The plain “turnover” in the header does include that effect. With a free account: the full history and sectors over time.
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
Investment firm, per its Form ADV of Mar 30, 2026 (medium confidence).
The data, as reported: MAWER INVESTMENT MANAGEMENT LTD. (CRD 159100): Institutional mandates; 5.D assets by client type: pooled vehicles 49%, pension plans 12%, corporations 10%, high net worth 8% (of $40.9 bn); 5.F 12669 accounts, 2% non-discretionary; 5.D 6075 clients, 4960 individuals
The type comes from a rule applied to that data. If it looks wrong, tell us.
Not counted as a concentrated manager: its portfolio is not within 5 to 100 positions; its top 10 positions are under 45%. Its portfolio is shown all the same, but it is left out of manager counts, the consensus and the ranking. How this is decided
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Same type of filer and a 13F portfolio value between a third and three times this one. It is not a comparison of what they hold.
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