SCHEDULE: Neuberger Berman Discloses 5.2% Stake in White Mountains Insurance

Neuberger Berman Group LLC and its affiliates have reported beneficial ownership of 5.2% of White Mountains Insurance Group Ltd. common stock as of September 30, 2026.

Summary

• Neuberger Berman Group LLC and its affiliates, including Neuberger Berman Investment Advisers LLC, have filed a Schedule 13G.
• As of September 30, 2026, these entities collectively beneficially own 124,677 shares of White Mountains Insurance Group Ltd. common stock.
• This represents approximately 5.2% of the class of securities.
• The filing indicates shared voting power for 117,386 shares and shared disposition power for 124,677 shares.
• Sole voting and disposition power for all reporting entities is reported as zero.
• The filing clarifies that these entities may be deemed beneficial owners in their fiduciary capacities, but disclaim beneficial ownership for themselves, asserting clients have sole rights to dividends and sale proceeds.
• The reporting entities are identified as investment advisers and holding companies organized in Delaware.

Sentiment

Score: 7

Explanation: StockSavvy.ai views this filing as neutral to slightly positive, indicating a significant but not overwhelming stake by a major investment manager, with no immediate red flags.

Positives

• Significant institutional ownership by a reputable investment manager (Neuberger Berman Group LLC).
• The filing is a routine Schedule 13G, indicating a passive investment approach rather than an activist one.
• The company's shares are held across various fiduciary capacities, suggesting a diversified client base.

Negatives

• The filing does not provide specific details on the investment strategy or rationale behind acquiring the stake.
• The disclaimer of beneficial ownership, while standard, can create ambiguity regarding ultimate control or influence.

Risks

• Potential for future changes in beneficial ownership, which could impact share price if the stake is significantly increased or decreased.
• Market perception of institutional investor activity, even if passive, can influence stock performance.

Future Outlook

The filing itself does not contain forward-looking statements or specific future guidance from the company. It reports on current beneficial ownership as of a past date.

Management Comments

• "This report is not an admission that any of these entities are the beneficial owner of the securities covered by this report and each of Neuberger Berman Group LLC, Neuberger Berman Investment Advisers Holdings LLC, Neuber Trust Holdings LLC, Neuberger Berman Trust Co. N.A., Neuberger Berman Asia Ltd., Neuberger Berman Canada ULC, Neuberger Berman Trust Co. of Delaware N.A. and Neuberger Berman Investment Advisers LLC and certain affiliated persons disclaim beneficial ownership of the securities covered by this statement pursuant to Exchange Act Rule 13d-4."
• "Neuberger Berman Group LLC and its affiliates may be deemed to be beneficial owners of securities for purposes of Exchange Act Rule 13d-3 because they or certain affiliated persons have shared power to retain, dispose of or vote the securities of unrelated clients."
• "Neuberger Berman Group LLC or its affiliated persons do not, however, have any economic interest in the securities of those clients. The clients have the sole right to receive and the power to direct the receipt of dividends from or proceeds from the sale of such securities."

Industry Context

StockSavvy.ai notes that Schedule 13G filings are common for large investment managers accumulating stakes in publicly traded companies. This filing indicates Neuberger Berman's ongoing investment activity within the insurance sector, a segment White Mountains Insurance Group operates within.

Comparison to Industry Standards

• The 5.2% stake is a significant holding for a Schedule 13G filer, often indicating a substantial investment by an institutional asset manager.
• Standard practice for investment advisers like Neuberger Berman is to manage portfolios across various sectors, including financial services and insurance.
• The disclaimer of beneficial ownership is a standard legal practice for fiduciaries managing assets for multiple clients, aligning with industry norms for such filings.

Stakeholder Impact

• Shareholders: May view the increased institutional ownership positively, potentially leading to greater liquidity or market interest. However, the passive nature of the filing suggests no immediate impact on control.
• Company Management: The filing does not directly impact company operations but signifies a notable investor's presence.
• Creditors: No direct impact is indicated by this filing.

Next Steps

• Monitor future filings from Neuberger Berman Group LLC and its affiliates for any changes in their beneficial ownership of White Mountains Insurance Group Ltd. stock.
• Observe any potential strategic implications or market reactions to this disclosure.

Key Dates

Keywords

White Mountains Insurance Group, Neuberger Berman, Schedule 13G, Institutional Ownership, Beneficial Ownership, Investment Management, Common Stock, SEC Filing