Latest Period
Q2 2026
Security Snapshot
AFFILIATED MANAGERS GROUP, INC. - Common Stock (AMG) Institutional Ownership
CUSIP: 008252108
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
257
Shares (Excl. Options)
7,623,454
Price
$338.40
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- Security type / class
- Equity / Common Stock
- Symbol
- AMG on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 7,623,454
- Total 13F value
- $2,580,247,454
- Portfolio coverage rank
- 0%
- Share change
- -157,745
- Value change
- -$51,733,594
- Number of holders
- 257
- Shares outstanding
- 26,719,538
- SEC-reported price per share
- $359.78
- Insider filing price
- $359.78
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- AMG - AFFILIATED MANAGERS GROUP, INC. - Common Stock is tracked under CUSIP 008252108.
- 257 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 542 to 257 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $6,869,153,277 to $2,580,247,454.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 257 institutions filings for Q2 2026.
Security key
008252108
Latest holder period
Q2 2026
13F holders
257
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
AMG full holder history
AFFILIATED MANAGERS GROUP, INC. SEC filings
AFFILIATED MANAGERS GROUP, INC. company facts
AFFILIATED MANAGERS GROUP, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 008252108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
AMG
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| MORGAN STANLEY | 7% | $472,898,962 | 1,983,387 | Morgan Stanley | 30 Sep 2025 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $383,712,065 | 1,386,744 | Vanguard Capital Management | 31 Mar 2026 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.1% | $378,644,581 | 1,368,430 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| INTEGRATED CORE STRATEGIES (US) LLC | 3.6% | -34% | $242,510,253 | -$116,590,124 | 1,017,113 | -32% | Millennium Management LLC | 30 Sep 2025 |
| Clarkston Capital Partners, LLC | 3.2% | -40% | $260,639,425 | -$192,591,220 | 904,119 | -42% | Clarkston Capital Partners, LLC | 31 Dec 2025 |
As of 30 Jun 2026, 257 institutional investors reported holding 7,623,454 shares of AFFILIATED MANAGERS GROUP, INC. - Common Stock (AMG). This represents 29% of the company’s total 26,719,538 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
26%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10% | 2,772,736 | -3.3% | 0.01% | $938,293,980 |
| Boston Partners | 3.7% | 1,001,967 | +3.2% | 0.3% | $339,149,256 |
| STATE STREET CORP | 3.3% | 883,323 | -4.7% | 0.01% | $298,916,503 |
| LSV ASSET MANAGEMENT | 2% | 533,611 | +12% | 0.33% | $180,574,000 |
| Channing Capital Management, LLC | 1.1% | 302,514 | -0.05% | 2.4% | $102,370,738 |
| Bank of New York Mellon Corp | 1.1% | 281,967 | -6.1% | 0.02% | $95,417,584 |
| Fisher Asset Management, LLC | 0.92% | 246,463 | -2.7% | 0.02% | $83,403,362 |
| NEW YORK STATE COMMON RETIREMENT FUND | 0.33% | 89,089 | -2.5% | 0.04% | $30,147,718 |
| Arbejdsmarkedets Tillaegspension | 0.33% | 88,640 | -3.6% | 0.65% | $29,995,776 |
| VICTORY CAPITAL MANAGEMENT INC | 0.29% | 77,188 | -16% | 0.01% | $26,120,420 |
| Retirement Systems of Alabama | 0.28% | 75,584 | -12% | 0.08% | $25,577,626 |
| Capricorn Fund Managers Ltd | 0.26% | 69,045 | 1.9% | $23,364,828 | |
| PRINCIPAL FINANCIAL GROUP INC | 0.22% | 59,949 | -4.5% | 0.01% | $20,286,742 |
| ENVESTNET ASSET MANAGEMENT INC | 0.22% | 59,150 | -3.2% | 0% | $20,016,413 |
| Moran Wealth Management, LLC | 0.17% | 45,453 | +96% | 0.42% | $15,381,295 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.16% | 42,853 | -5.6% | 0.02% | $14,501,454 |
| STRS OHIO | 0.16% | 42,282 | +6375% | 0.05% | $14,308,229 |
| Robeco Institutional Asset Management B.V. | 0.15% | 39,981 | -19% | 0.02% | $13,529,571 |
| DEUTSCHE BANK AG\ | 0.15% | 39,692 | -24% | 0% | $13,431,774 |
| NORDEA INVESTMENT MANAGEMENT AB | 0.13% | 35,681 | -6.1% | 0.01% | $12,296,386 |
| Calamos Advisors LLC | 0.13% | 35,430 | 0% | 0.04% | $11,989,512 |
| Goodman Financial Corp | 0.12% | 32,962 | +1.4% | 1.7% | $11,154,418 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | 0.12% | 32,841 | -5.7% | 0.02% | $11,113,000 |
| Russell Investments Group, Ltd. | 0.11% | 29,925 | -68% | 0.01% | $10,128,578 |
| NICOLA WEALTH MANAGEMENT LTD. | 0.11% | 29,000 | 0% | 1.1% | $9,813,600 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 7,623,454 | $2,580,247,454 | -$51,733,594 | $338.40 | 257 |
| 2026 Q1 | 24,822,347 | $6,869,153,277 | -$309,035,381 | $276.70 | 542 |
| 2025 Q4 | 25,904,850 | $7,466,023,971 | -$220,573,014 | $288.28 | 508 |
| 2025 Q3 | 26,411,009 | $6,299,567,420 | -$66,089,846 | $238.43 | 445 |
| 2025 Q2 | 26,821,076 | $5,277,536,259 | -$84,552,044 | $196.77 | 429 |
| 2025 Q1 | 27,306,479 | $4,587,628,181 | -$145,951,145 | $168.03 | 392 |
| 2024 Q4 | 28,085,768 | $5,193,636,087 | -$37,146,826 | $184.92 | 402 |
| 2024 Q3 | 28,242,165 | $5,022,646,889 | -$137,327,716 | $177.80 | 415 |
| 2024 Q2 | 29,228,697 | $4,566,839,022 | -$179,986,644 | $156.23 | 400 |
| 2024 Q1 | 30,357,618 | $5,081,322,483 | -$178,552,037 | $167.47 | 397 |
| 2023 Q4 | 31,461,140 | $4,763,852,793 | -$11,154,607 | $151.42 | 378 |
| 2023 Q3 | 31,835,853 | $4,149,568,321 | -$160,169,124 | $130.34 | 351 |
| 2023 Q2 | 32,934,145 | $4,935,947,671 | -$231,274,446 | $149.89 | 373 |
| 2023 Q1 | 34,481,765 | $4,909,680,816 | -$59,148,004 | $142.42 | 381 |
| 2022 Q4 | 34,137,955 | $5,409,381,533 | +$201,992,929 | $158.43 | 359 |
| 2022 Q3 | 36,229,129 | $4,053,998,764 | -$95,089,153 | $111.85 | 313 |
| 2022 Q2 | 37,040,598 | $4,318,576,540 | -$58,258,396 | $116.60 | 295 |
| 2022 Q1 | 37,733,230 | $5,311,429,681 | -$218,204,978 | $140.95 | 321 |
| 2021 Q4 | 39,151,044 | $6,438,057,146 | -$164,556,122 | $164.51 | 353 |
| 2021 Q3 | 39,928,917 | $6,032,107,463 | -$170,562,006 | $151.09 | 324 |
| 2021 Q2 | 41,048,842 | $6,329,674,747 | -$157,575,379 | $154.21 | 329 |
| 2021 Q1 | 42,090,229 | $6,273,698,852 | -$440,697,642 | $149.03 | 306 |
| 2020 Q4 | 45,205,424 | $4,597,117,191 | -$72,126,508 | $101.70 | 284 |
| 2020 Q3 | 45,969,550 | $3,143,604,380 | -$5,955,763 | $68.38 | 264 |
| 2020 Q2 | 46,508,681 | $3,466,955,019 | -$13,902,860 | $74.56 | 278 |