529 institutions reported holding AMG for 2026Q1, together 90% of the company, more than the 499 a quarter earlier. Institutions reporting a position: 529 (as of 2026Q1). Shares held by institutions: 24.7M, long US equity positions only, as reported on Form 13F. Reported value: $6.83B, at 2026-03-31 prices, not today's. Top 5 holders: 34%, of the whole company, between five filers.

AMGAffiliated Managers Group, Inc.

Financial ServicesUSD

$370.95

$211.2752 weeks$383.67

Who owns AMG

529 institutions reported holding AMG for 2026Q1, together 90% of the company, more than the 499 a quarter earlier.

529

Institutions reporting a position · as of 2026Q1 · up from 499 the quarter before

Shares held by institutions: 24.7M
Shares held by institutions · 90% of the company · long US equity positions only, as reported on Form 13F
Reported value: $6.83B
Reported value · at 2026-03-31 prices, not today's
Top 5 holders: 34%
Top 5 holders · of the whole company, between five filers

Details›

Reporting quarter2026-03-31: 2026Q1
Quarters on record: 52
New positions: 81
Positions exited: 55
Added to: 196
Reduced: 124
Top 10 holdersof the company: 47%

Institutional ownership by quarter, 2013Q2 to 2026Q1
Quarter	Filers	Shares	Reported value
2026Q1	529	24.7M	$6.83B
2025Q4	499	25.9M	$7.44B
2025Q3	443	26.2M	$6.25B
2025Q2	427	26.8M	$5.27B
2025Q1	392	27.6M	$4.64B
2024Q4	403	28.3M	$5.20B
2024Q3	416	28.3M	$5.03B
2024Q2	401	29.2M	$4.56B
2024Q1	396	30.4M	$5.09B
2023Q4	379	31.5M	$4.77B
2023Q3	351	31.8M	$4.14B
2023Q2	373	33.4M	$4.93B
2023Q1	380	35.1M	$4.90B
2022Q4	363	34.9M	$5.50B
2022Q3	327	36.2M	$4.06B
2022Q2	306	37.0M	$4.31B

Largest reported holders, 2026Q1
Holder	Shares	% of company	Value
BlackRock Inc.	2.9M	10%	$793M
VANGUARD GROUP INC	2.8M	10%	$765M
MORGAN STANLEY	1.7M	6.3%	$479M
ARIEL INVESTMENTS, LLC	1.1M	3.9%	$294M
Robeco Investment Management, Inc.	1.0M	3.5%	$269M
STATE STREET CORP	0.9M	3.4%	$256M
FULLER & THALER ASSET MANAGEMENT, INC.	0.8M	2.8%	$210M
DIMENSIONAL FUND ADVISORS LP	0.7M	2.6%	$199M
GEODE CAPITAL MANAGEMENT LLC	0.6M	2.3%	$176M
LYRICAL ASSET MANAGEMENT LP	0.5M	1.8%	$139M

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.

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