Why Affiliated Managers Group (AMG) Stock Is Up Today

Affiliated Managers Group (AMG) is up 4.6% today. Here is some analysis on what might have caused this price movement.

Analysis: The move appears tied to AMG’s third-quarter results and updated outlook released on November 9, 2026. Investors seem to be responding to sharply higher year-over-year profitability, record assets under management and inflows, and continued aggressive share repurchases, along with fourth-quarter guidance that points to another strong quarter.

Details:

AMG reported third-quarter economic earnings per share of $9.50, up 56% from a year earlier, while adjusted EBITDA rose 41% to $353.7 million.

Assets under management reached a record $973.9 billion at September 30, 2026, and net client cash flows were $20.7 billion in the quarter, helped by record alternative net inflows of more than $31 billion.

The company repurchased about $400 million of stock during the quarter, bringing year-to-date buybacks to roughly $775 million, which can support earnings per share and signal management confidence.

AMG’s fourth-quarter guidance called for adjusted EBITDA of $405 million to $475 million and economic earnings per share of $11.37 to $13.43, suggesting momentum may continue into year-end.

Sources:

Affiliated Managers Group Investor Relations, SEC, Yahoo Finance

Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.

$AMG Insider Trading Activity

$AMG insiders have traded $AMG stock on the open market 2 times in the past 6 months. Of those trades, 1 have been purchases and 1 have been sales.

Here’s a breakdown of recent trading of $AMG stock by insiders over the last 6 months:

JAY C. HORGEN (President and CEO) sold 17,500 shares for an estimated $5,919,725
ANNETTE FRANQUI purchased 750 shares for an estimated $228,660

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

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$AMG Hedge Fund Activity

We have seen 274 institutional investors add shares of $AMG stock to their portfolio, and 265 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

MILLENNIUM MANAGEMENT LLC added 869,748 shares (+16202.5%) to their portfolio in Q2 2026, for an estimated $294,322,723
SIXTH STREET PARTNERS MANAGEMENT COMPANY, L.P. added 287,795 shares (+inf%) to their portfolio in Q2 2026, for an estimated $97,389,828
MORGAN STANLEY removed 245,293 shares (-14.2%) from their portfolio in Q2 2026, for an estimated $83,007,151
ARTISAN PARTNERS LIMITED PARTNERSHIP removed 173,595 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $58,744,547
WOODLINE PARTNERS LP removed 145,879 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $49,365,453
JPMORGAN CHASE & CO added 129,402 shares (+inf%) to their portfolio in Q2 2026, for an estimated $43,789,636
QUBE RESEARCH & TECHNOLOGIES LTD added 114,504 shares (+74.2%) to their portfolio in Q2 2026, for an estimated $38,748,153

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.