Columbia Financial rises as upcoming conversion and Northfield tie-up draw focus

By: Quiver PriceTracker

Posted: 3 hours ago / July 17, 2026 9:21 p.m. UTC

CLBK

Columbia Financial (CLBK) is up 3.7% today. Here is some analysis on what might have caused this price movement.

Analysis: The move appears tied to renewed attention on Columbia Financial’s pending second-step conversion and the expected follow-on acquisition of Northfield Bancorp. A fresh market notice outlined the timing for the share exchange and said the Northfield transaction is expected to be completed immediately after the conversion, which may have strengthened investor confidence around the combined company.

Details:

A market notice dated July 17 said the conversion from mutual holding company form to fully public stock holding company form is expected to become effective after the close on July 20, with marketplace changes taking effect July 21.

That same notice said each existing share will be exchanged for 2.20 shares of the new Columbia Financial common stock, while keeping the CLBK ticker symbol.

The notice also said Columbia expects to complete its acquisition of Northfield Bancorp immediately after the conversion closes, tying the stock’s near-term story to a larger strategic combination.

Earlier company materials showed stockholder and depositor approvals for the conversion and merger, and disclosed about $1.1 billion of subscription offering demand before the underwritten offering phase.

Sources:

Nasdaq Trader, SEC, Columbia Bank Investor Relations

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

$CLBK Hedge Fund Activity

We have seen 43 institutional investors add shares of $CLBK stock to their portfolio, and 50 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

URSA FUND MANAGEMENT, LLC added 500,000 shares (+inf%) to their portfolio in Q1 2026, for an estimated $8,755,000
MANGROVE PARTNERS IM, LLC added 100,911 shares (+inf%) to their portfolio in Q1 2026, for an estimated $1,766,951
MARSHALL WACE, LLP removed 88,551 shares (-100.0%) from their portfolio in Q1 2026, for an estimated $1,550,528
TUDOR INVESTMENT CORP ET AL added 85,000 shares (+324.8%) to their portfolio in Q1 2026, for an estimated $1,488,350
RENAISSANCE TECHNOLOGIES LLC added 72,334 shares (+12.0%) to their portfolio in Q1 2026, for an estimated $1,266,568
MORGAN STANLEY added 72,019 shares (+25.5%) to their portfolio in Q1 2026, for an estimated $1,261,052
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP removed 66,030 shares (-100.0%) from their portfolio in Q1 2026, for an estimated $1,156,185

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.