Mawer Investment Management Ltd.

View all activity View 13F on SEC

Data as of Q4 2025

Institutional investor tracked via SEC 13F filings. Portfolio snapshot as of 2025-12-31.SEC EDGAR Source

Assets Under Management

$17.9B

Total Positions

125

New This Quarter

Filing Period

2025-12-31

Portfolio Allocation

Top holdings by portfolio weight

MSFT7.12%

GOOG6.45%

AMZN5.26%

MRSH4.06%

V4.00%

APH3.85%

BKNG3.37%

SHEL3.32%

AON2.92%

WAT2.76%

Other28.75%

Position Outcomes

Best and worst performing positions by estimated return

Top Winners

GOOGL28Q held

Alphabet Inc

Avg $94.92 · $4.2M est. P&L

Est. P&L

+230.66%

MSFT28Q held

Microsoft Corp

Avg $147.67 · $892.5M est. P&L

Est. P&L

+230.11%

TSM28Q held

TAIWAN SEMICONDUCTOR MFG LTD

Avg $95.56 · $38.1M est. P&L

Est. P&L

+213.50%

Top Losers

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Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.

Top Holdings(Showing 25 of 125 — sorted by value)

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Activity:

Stock	Shares	Value	Weight	Price Trend	Avg Buy	Est. P&L	Held	Conviction
MSFT Microsoft Corp	2.6M	$1.3B	7.1%	—	$147.67	+230.11%	28 qtrs	Decreased 0
GOOG Alphabet Inc	3.7M	$1.2B	6.4%	—	$109.94	+186.12%	28 qtrs	Decreased 0
AMZN Amazon.com Inc	4.1M	$939.4M	5.3%	—	$138.39	+68.03%	28 qtrs	Decreased 0
MRSH Marsh & McLennan Cos Inc	3.9M	$724.6M	4.1%	—	$106.53	+74.98%	28 qtrs	Decreased 0
V Visa Inc	2M	$713.8M	4.0%	—	$197.43	+78.74%	28 qtrs	Decreased 0
APH Amphenol Corp	5.1M	$687.3M	3.9%	—	$46.66	+191.90%	28 qtrs	Decreased 0
BKNG Booking Holdings Inc	112,205	$600.9M	3.4%	—	$2,527.92	+114.69%	28 qtrs	Decreased 0
SHEL SHELL PLC	8.1M	$593.4M	3.3%	—	$60.40	+22.23%	14 qtrs	Increased 88
AON Aon PLC	1.5M	$521.4M	2.9%	—	$187.68	+89.94%	23 qtrs	Decreased 0
WAT Waters Corp	1.3M	$493.3M	2.8%	—	$277.46	+38.40%	28 qtrs	Decreased 0
NOC Northrop Grumman Corp	846,131	$482.5M	2.7%	—	$490.08	+17.24%	3 qtrs	Decreased 0
AER AERCAP HOLDINGS NV	3.3M	$470.5M	2.6%	—	$127.50	+13.05%	3 qtrs	Increased 76
WFC Wells Fargo & Co	4.9M	$454.5M	2.5%	—	$90.23	+4.01%	2 qtrs	Increased 86
META Meta Platforms Inc	688,205	$454.3M	2.5%	—	$732.40	-9.07%	3 qtrs	Increased 53
BRK/A BERKSHIRE HATHAWAY INC DEL C	587	$443.1M	2.5%	—	—	—	4 qtrs	Decreased 0
FCN FTI Consulting Inc	2.3M	$393.9M	2.2%	—	$146.35	+17.99%	20 qtrs	Decreased 0
ICE Intercontinental Exchange Inc	2.4M	$393.7M	2.2%	—	$138.96	+17.41%	28 qtrs	Decreased 0
JPM JPMORGAN CHASE & CO.	1M	$327.2M	1.8%	—	$215.75	+49.23%	28 qtrs	Decreased 0
CME CME Group Inc	1.1M	$311.4M	1.7%	—	$210.44	+31.07%	28 qtrs	Decreased 0
MA Mastercard Inc	463,159	$264.4M	1.5%	—	$403.20	+42.99%	28 qtrs	Decreased 0
ATR AptarGroup Inc	2.1M	$250.9M	1.4%	—	$129.81	-5.81%	28 qtrs	Decreased 0
CDW CDW Corp/DE	1.8M	$243.4M	1.4%	—	$127.31	+8.71%	23 qtrs	Decreased 0
MEDP Medpace Holdings Inc	407,302	$228.8M	1.3%	—	$312.11	+82.26%	4 qtrs	Decreased 0
COR Cencora Inc	618,284	$208.8M	1.2%	—	$128.72	+163.73%	28 qtrs	Decreased 0
OSIS OSI SYSTEMS INC	803,602	$205M	1.1%	—	$201.62	+30.42%	5 qtrs	Decreased 0
Showing 25 of 125 results.PROUpgrade to see all →

Accumulation Streaks

Positions with 2+ consecutive quarters of increases — persistent directional conviction.

Security

ABNBAirbnb Inc

Q2 2025 → Q4 2025+619,561 shares+$84.9M

HDBHDFC BANK LTD

Q2 2025 → Q4 2025+1.8M shares+$25.5M

ABBVAbbVie Inc

Q3 2025 → Q4 2025+17,404 shares+$14.4M

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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer