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AMG · Affiliated Managers Group, Inc. · Shareholders & Ownership

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$395.53 +1.87 (+0.48%) At close · Oct 22
Market Cap
$10.22B
Shares
25.86M
Volume · Oct 22 204.49K Avg daily vol (3M) 273.8K

Every disclosed holder of AMG in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns AMG

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 25,415,701 98.28%
Insiders (Forms 3, 4, 5) 903,738 3.49%
13D/G-only blocks 1,017,113 3.93%
Remaining 1,476,619 -5.71%
Registered funds (N-PORT, not summed) 11,214,738 43.37%

Shares outstanding: 25,859,933, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of AMG

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
2,772,736
1.1
iShares Core S&P Mid-Cap ETF
Fund S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
903,925
1.2
iShares S&P Mid-Cap 400 Growth ETF
Fund S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
158,039
1.3
iShares Russell Mid-Cap ETF
Fund S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
104,792
1.4
iShares Russell 1000 Value ETF
Fund S000004345 · Registered fund · Jun 30, 2026
iShares Trust, not summed
57,125
1.5
iShares U.S. Small-Cap Equity Factor ETF
Fund S000048624 · Registered fund · Jul 31, 2026
iShares Trust, not summed
44,108
2
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,487,219
2.1
MORGAN STANLEY
13G CIK 895421 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
1,458,379
2.2
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
34
3
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,391,836
4
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,151,085
5
Millennium Management LLC
13G CIK 1319244 · Unknown · Sep 30, 2025
Rule 13d-1(c), passive investor
1,017,113
6
Boston Partners
13F CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,001,967
7
ARIEL INVESTMENTS, LLC
13F CIK 936753 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
999,676
7.1
Ariel Fund
Fund S000005024 · Registered fund · Jun 30, 2026
Ariel Investment Trust, not summed
280,984
7.2
Ariel Focus Fund
Fund S000005026 · Registered fund · Jun 30, 2026
Ariel Investment Trust, not summed
14,306
8
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
883,323
8.1
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
133,710
8.2
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
40,945
8.3
State Street(R) SPDR(R) S&P(R) Capital Markets ETF
Fund S000006978 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
19,942
8.4
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
9,039
8.5
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
4,200
9
MILLENNIUM MANAGEMENT LLC
13F CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
875,116
10
FULLER & THALER ASSET MANAGEMENT, INC.
13F CIK 1082327 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
857,756
11
FULLERTHALER BEHAVIORAL SMALL CAP EQUITY
Fund S000051163 · Registered fund · Jun 30, 2026
Capitol Series Trust, not summed
815,790
12
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
796,439
13
Eaton Vance Atlanta Capital SMID-Cap Fund
Fund S000005198 · Registered fund · Jun 30, 2026
Eaton Vance Growth Trust, not summed
785,100
14
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
670,195
14.1
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
133,025
14.2
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
85,132
14.3
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
64,120
14.4
U.S. CORE EQUITY 2 PORTFOLIO
Fund S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
48,512
14.5
U.S. CORE EQUITY 1 PORTFOLIO
Fund S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
35,352
15
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
590,757
16
Horgen Jay C.
Insider CIK 1432993 · Jun 8, 2026
Director, Chief Executive Officer, issuer-wide
588,764
17
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
575,609
18
LSV ASSET MANAGEMENT
13F CIK 1050470 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
533,611
19
LYRICAL ASSET MANAGEMENT LP
13F CIK 1542302 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
472,886
19.1
LYRICAL U.S. VALUE EQUITY FUND
Fund S000039711 · Registered fund · May 31, 2026
Ultimus Managers Trust, not summed
81,534
20
Allianz Asset Management GmbH
13F CIK 1535323 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
453,989
20.1
PIMCO RAE US Small Fund
Fund S000048957 · Registered fund · Jun 30, 2026
PIMCO Equity Series, not summed
210,650
20.2
PIMCO RAFI Dynamic Multi-Factor U.S. Equity ETF
Fund S000057225 · Registered fund · Jun 30, 2026
PIMCO Equity Series, not summed
997
21
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
432,420
22
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
380,623
22.1
Invesco S&P MidCap Momentum ETF
Fund S000003056 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
262,389
22.2
Invesco BuyBack AchieversTM ETF
Fund S000013111 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
25,112
22.3
Invesco Dorsey Wright Momentum ETF
Fund S000013787 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
23,912
22.4
Invesco S&P MidCap Value with Momentum ETF
Fund S000003057 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
11,708
22.5
Invesco RAFI US 1000 ETF
Fund S000011995 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
9,018
23
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
364,523
24
NORGES BANK
13F CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
361,473
25
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
322,670
25.1
Mid Cap Index Fund
Fund S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
17,163
25.2
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
5,688
25.3
Large Cap Core Fund
Fund S000001243 · Registered fund · Jun 30, 2026
Northern Funds, not summed
3,917
25.4
U.S. Quality ESG Fund
Fund S000055816 · Registered fund · Jun 30, 2026
Northern Funds, not summed
835
26
JANE STREET GROUP, LLC
13F CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
309,134
27
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
302,771
28
Channing Capital Management, LLC
13F CIK 1302404 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
302,514
28.1
CHANNING INTRINSIC VALUE SMALL-CAP FUND
Fund S000071821 · Registered fund · Jul 31, 2026
Valued Advisers Trust, not summed
797
29
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
287,795
29.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
135,022
29.2
Schwab U.S. Mid-Cap ETF
Fund S000026635 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
76,005
29.3
Schwab Fundamental U.S. Large Company ETF
Fund S000040877 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
25,372
29.4
Schwab U.S. Broad Market ETF
Fund S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
16,447
29.5
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
16,055
30
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
281,967
30.1
BNY Mellon US Mid Cap Core Equity ETF
Fund S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
4,038
31
Qube Research & Technologies Ltd
13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
268,737
32
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
258,331
32.1
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
1,834
32.2
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
877
32.3
Goldman Sachs MarketBeta(R) Russell 1000 Value Equity ETF
Fund S000083006 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
341
33
Fisher Asset Management, LLC
13F CIK 850529 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
246,463
34
RAYMOND JAMES FINANCIAL INC
13F CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
239,235
34.1
Carillon ClariVest Capital Appreciation Fund
Fund S000058957 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
12,290
35
Clarkston Capital Partners, LLC
13F CIK 1562855 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
228,683
35.1
Clarkston Partners Fund
Fund S000050589 · Registered fund · Jun 30, 2026
ALPS SERIES TRUST, not summed
70,000
35.2
Clarkston Founders Fund
Fund S000053615 · Registered fund · Jun 30, 2026
ALPS SERIES TRUST, not summed
12,500
35.3
Clarkston Fund
Fund S000050590 · Registered fund · Jun 30, 2026
ALPS SERIES TRUST, not summed
3,800
36
VANGUARD STRATEGIC EQUITY FUND
Fund S000002593 · Registered fund · Jun 30, 2026
VANGUARD HORIZON FUNDS, not summed
216,446
37
BRUNI J V & CO /CO
13F CIK 1078841 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
210,094
38
CITADEL ADVISORS LLC
13F CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
198,492
39
ALLIANCEBERNSTEIN L.P.
13F CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
189,739
39.1
AB DISCOVERY GROWTH FUND, INC.
Fund S000010117 · Registered fund · Jun 30, 2026
AB DISCOVERY GROWTH FUND, INC., not summed
84,987
39.2
Tax-Aware Overlay A Portfolio
Fund S000027648 · Registered fund · Jun 30, 2026
BERNSTEIN SANFORD C FUND INC, not summed
596
39.3
Overlay A Portfolio
Fund S000027647 · Registered fund · Jun 30, 2026
BERNSTEIN SANFORD C FUND INC, not summed
241
40
Kiltearn Partners LLP
13F CIK 1582633 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
184,586
41
Caisse de depot et placement du Quebec
13F CIK 898286 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
182,041
42
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
177,576
42.1
Fidelity Extended Market Index Fund
Fund S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
144,917
42.2
Fidelity Mid Cap Index Fund
Fund S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
96,689
42.3
Fidelity SAI Small-Mid Cap Momentum Index Fund
Fund S000050321 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
79,033
42.4
Fidelity Total Market Index Fund
Fund S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
53,025
42.5
Strategic Advisers U.S. Total Stock Fund
Fund S000084926 · Registered fund · May 31, 2026
Fidelity Rutland Square Trust II, not summed
51,000
43
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
175,776
44
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
166,559
44.1
T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund
Fund S000002074 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
67,614
44.2
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund
Fund S000052904 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
15,715
44.3
T. Rowe Price Extended Equity Market Index Fund
Fund S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
3,688
44.4
T. Rowe Price Mid-Cap Index Fund
Fund S000051326 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
2,263
44.5
T. Rowe Price Total Equity Market Index Fund
Fund S000002091 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
1,279
45
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
165,842
46
LORD, ABBETT & CO. LLC
13F CIK 728100 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
164,477
46.1
LORD ABBETT MID CAP STOCK FUND INC
Fund S000001450 · Registered fund · Jun 30, 2026
LORD ABBETT MID CAP STOCK FUND INC, not summed
60,820
46.2
Lord Abbett Value Opportunities Fund
Fund S000007144 · Registered fund · Jul 31, 2026
LORD ABBETT SECURITIES TRUST, not summed
55,323
46.3
Small-Cap Value Series
Fund S000007001 · Registered fund · May 31, 2026
LORD ABBETT RESEARCH FUND INC, not summed
22,265
46.4
Mid Cap Stock Portfolio
Fund S000007304 · Registered fund · Jun 30, 2026
LORD ABBETT SERIES FUND INC, not summed
13,060
46.5
Lord Abbett Focused Small Cap Value Fund
Fund S000007143 · Registered fund · Jul 31, 2026
LORD ABBETT SECURITIES TRUST, not summed
7,702
47
Wojcik Thomas M
Insider CIK 1776685 · Mar 6, 2026
President and COO, issuer-wide
159,465
48
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
129,402
49
RENAISSANCE TECHNOLOGIES LLC
13F CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
117,440
50
SEI INVESTMENTS CO
13F CIK 350894 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
117,142

68 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 769 holders

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Key facts CIK 1004434 CUSIP 008252108 13F (30d) 104 filings 98 filers Visit website Investor relations