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Affiliated Managers Group, Inc.

MGRB
Exchange
NYSE
Industry
Investment Advice
SEC CIK
0001004434

No open-market purchases or sales by Affiliated Managers Group, Inc. insiders were filed in the last 90 days; 2 institutions reported holding it in 13F filings for Q2 2026, worth $10.9K in total; no superinvestor holds it.

Other share classesAMGMGRMGRDMGRE

13F holders, Q2 2026

Institutional positions in Affiliated Managers Group, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
2
0 vs. Q1 2026
Shares held
673
+343 (+103.9%) vs. Q1 2026
Total value
$10.9K
+$5.58K (+105.2%) vs. Q1 2026
New holders
0
1 more added
Sold out
0
0 more reduced

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MGRB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 2 institutions
Q1 2021: 1 institutionQ2 2021: 1 institutionQ3 2021: 1 institutionQ4 2021: 1 institutionQ1 2022: 1 institutionQ2 2022: 0 institutionsQ3 2022: 1 institutionQ4 2022: 1 institutionQ1 2023: 0 institutionsQ2 2023: 1 institutionQ3 2023: 0 institutionsQ4 2023: 0 institutionsQ1 2024: 0 institutionsQ2 2024: 1 institutionQ3 2024: 1 institutionQ4 2024: 1 institutionQ1 2025: 1 institutionQ2 2025: 1 institutionQ3 2025: 2 institutionsQ4 2025: 2 institutionsQ1 2026: 2 institutionsQ2 2026: 2 institutions
Value heldQ2 2026: $10.9K
Q1 2021: $8.00KQ2 2021: $8.00KQ3 2021: $8.00KQ4 2021: $0Q1 2022: $0Q2 2022: $0Q3 2022: $1.53MQ4 2022: $101Q1 2023: $0Q2 2023: $1Q3 2023: $0Q4 2023: $0Q1 2024: $0Q2 2024: $6.96KQ3 2024: $7.56KQ4 2024: $7.49KQ1 2025: $6.91KQ2 2025: $4.59KQ3 2025: $4.71KQ4 2025: $3.34KQ1 2026: $5.30KQ2 2026: $10.9K
Institutions holding MGRB and their total value by quarter
QuarterHoldersValue
Q2 20262$10.9K
Q1 20262$5.30K
Q4 20252$3.34K
Q3 20252$4.71K
Q2 20251$4.59K
Q1 20251$6.91K
Q4 20241$7.49K
Q3 20241$7.56K
Q2 20241$6.96K
Q1 20240$0
Q4 20230$0
Q3 20230$0
Q2 20231$1
Q1 20230$0
Q4 20221$101
Q3 20221$1.53M
Q2 20220$0
Q1 20221$0
Q4 20211$0
Q3 20211$8.00K
Q2 20211$8.00K
Q1 20211$8.00K

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding Affiliated Managers Group, Inc.; share changes are against Q1 2026.

Institutions holding MGRB in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
First Command Advisory Services, Inc.494$7.99K0.00%+343+227.2%Added
The PNC Financial Services Group, Inc.179$2.89K0.00%00.0%Unchanged