Affiliated Managers AMG Institutional Ownership

NYSE AMG

$354.40 -1.45 (-0.41%)

As of: Sep 10, 2026 · 3:59 PM EDT

Institutions by Trading Activity

568 Institutions

Increased 243 42.8%

Unchanged 111 19.5%

Reduced 214 37.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

96.71%

▲+4.02 pp QoQ

Shares Held by Institutions

25.53Mn

of 26.40Mn outstanding

▲+5.69% QoQ

Shares Outstanding

26.40Mn

867.88K held outside 13F filers

Institutional Investors

568

filed 13F for Jun 2026

▲+21 vs prior quarter

Net Shares Added (QoQ)

+1.38Mn

accumulated since last quarter

Value of Holdings

$9.45Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Affiliated Managers Group, Inc. (NYSE:AMG) appears in 568 institutional 13F filings for the quarter ending June 2026.

They owned 96.7% of outstanding stock in June 2026, up from 92.7% the prior quarter.
They increased total shares held in Affiliated Managers by 5.69% from the prior quarter, while the number of investors in AMG increased 30.28% year over year.
Activity in AMG broke down as 243 buyers, 214 sellers, and 111 unchanged among 568 total holders.
Altogether, these fund groups held 25.53Mn shares in AMG by June 2026, up by 1.38Mn shares quarter on quarter, and down 239.42K shares year over year.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Affiliated Managers with 2.77Mn shares, accounting for 10.5% of total shares outstanding.
Top purchasers of AMG stock for the quarter ending June 2026 included MILLENNIUM MANAGEMENT LLC (869.75K), NORGES BANK (361.47K), Sixth Street Partners Management Company, L.P. (287.8K), Qube Research & Technologies Ltd (114.5K), FULLER & THALER ASSET MANAGEMENT, INC. (97.54K).
Top sellers of AMG stock for the quarter ending June 2026 included Morgan Stanley (245.29K), BlackRock, Inc. (94.93K), Clarkston Capital Partners, LLC (85.02K), VOLORIDGE INVESTMENT MANAGEMENT, LLC (76.78K), Man Group plc (66.5K).
Business Quant data shows the 10 biggest positions in Affiliated Managers as of June 2026 are held by BlackRock, Inc. (2.77Mn), Morgan Stanley (1.49Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.39Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.15Mn), Boston Partners (1.0Mn), ARIEL INVESTMENTS, LLC (999.68K), State Street Corp (883.32K), MILLENNIUM MANAGEMENT LLC (875.12K), FULLER & THALER ASSET MANAGEMENT, INC. (857.76K), DIMENSIONAL FUND ADVISORS LP (670.2K).

Form 13F Holdings

569 Institutional Holders

Report period 30 Jun, 2026

Total shares held 25.53Mn

Of outstanding 96.71%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	2,772,736	10.50%	▼94,929	-3.31%	$938.29Mn
2	Morgan Stanley	0000895421	1,487,219	5.63%	▼245,293	-14.16%	$503.28Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,391,836	5.27%	▲32,043	+2.36%	$471.00Mn
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,151,085	4.36%	▼23,661	-2.01%	$389.53Mn
5	Boston Partners	0001386060	1,001,967	3.80%	▲30,720	+3.16%	$339.15Mn
6	ARIEL INVESTMENTS, LLC	0000936753	999,676	3.79%	▼64,354	-6.05%	$338.29Mn
7	State Street Corp	0000093751	883,323	3.35%	▼43,410	-4.68%	$298.92Mn
8	MILLENNIUM MANAGEMENT LLC	0001273087	875,116	3.31%	▲869,748	+16,202.46%	$296.14Mn
9	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	857,756	3.25%	▲97,543	+12.83%	$290.26Mn
10	DIMENSIONAL FUND ADVISORS LP	0000354204	670,195	2.54%	▼48,118	-6.70%	$226.80Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	590,757	2.24%	▼45,021	-7.08%	$199.95Mn
12	LSV ASSET MANAGEMENT	0001050470	533,611	2.02%	▲56,800	+11.91%	$180.57K
13	Allianz Asset Management GmbH	0001535323	479,594	1.82%	▼9,148	-1.87%	$152.85Mn
14	LYRICAL ASSET MANAGEMENT LP	0001542302	472,886	1.79%	▼29,235	-5.82%	$160.02Mn
15	Bank Of America Corp /De/	0000070858	432,420	1.64%	▲22,842	+5.58%	$146.33Mn
16	Invesco Ltd.	0000914208	380,623	1.44%	▲64,133	+20.26%	$128.80Mn
17	NORGES BANK	0001374170	361,473	1.37%	▲361,473	0.00%	$122.32Mn
18	Northern Trust Corp	0000073124	322,670	1.22%	▼26,212	-7.51%	$109.19Mn
19	JANE STREET GROUP, LLC	0001595888	309,134	1.17%	▲56,629	+22.43%	$104.61Mn
20	Channing Capital Management, LLC	0001302404	302,514	1.15%	▼158	-0.05%	$102.37Mn

Showing 1 to 20 of 569 holders