Across its top 20 institutional holders, AMG's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 23/100).

Quarterly Activity

Recent Activity

+$4.2B

Total Buy Value

$3.1B

Total Sell Value

New buy79

Trim136

Add219

Sold out48

298

Net Buyers

184

Net Sellers

Smart Money Convergence

AMG does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/AMG

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

008252108, 8252108

FAQ

Who are the top institutional investors holding AFFILIATED MANAGERS GROUP (AMG)?

Major stakeholders currently include BlackRock, Inc. ($793.5M), Morgan Stanley ($479.4M), Vanguard Portfolio Management LLC ($376.3M). Based on the latest 13F filings, there are a total of 545 tracked investment funds and institutions maintaining positions in AMG.

What is the overall institutional sentiment toward AMG recently?

Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $223.4M, driven by 298 managers accumulating shares while 184 reduced their exposure.

Which institutions have been selling or reducing their AMG positions?

In the latest period, 136 funds trimmed their holdings, and 48 managers completely exited their positions. The aggregate reported sell value was $3.1B.

Are there any notable investors adding AMG to their portfolios?

Yes, buying activity remains notable. 79 institutions opened new positions in {ticker}, and 219 existing holders added to their shares. The total reported buy value for the quarter amounted to $4.2B.

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Developer Access

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REST API

curl https://alphasmo.com/api/v1/market/stock/AMG

CLI

npx alphasmo stocks get AMG

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