R. David Rosato - 01 Apr 2022 Form 4 Insider Report for People's United Financial, Inc.

Footnote F1

On April 1, 2022, pursuant to an Agreement and Plan of Merger (the "Merger Agreement"), Bridge Merger Corp. ("Merger Sub"), a direct, wholly owned subsidiary of M&T Bank Corporation ("M&T"), merged with and into People's United Financial, Inc., a Delaware corporation ("People's United") with People's United as the surviving entity (the "Merger") and People's United then merged with and into M&T, with M&T as the surviving entity. Pursuant to the Merger Agreement, each issued and outstanding share of People's United common stock was converted into the right to receive 0.118 of a share of M&T (the "exchange ratio").

Footnote F10

These options vest in annual increments on 3/1/18 (33 1/3%); 3/1/19 (33 1/3%); and 3/1/20 (33 1/3%).

Footnote F11

These options vest in annual increments on 3/1/19 (33 1/3%); 3/1/20 (33 1/3%); and 3/1/21 (33 1/3%).

Footnote F12

These options vest in annual increments on 3/1/20 (33 1/3%); 3/1/21 (33 1/3%); and 3/1/22 (33 1/3%).

Footnote F13

These options vest in annual increments on 3/1/21 (33 1/3%); 3/1/22 (33 1/3%); and 3/1/23 (33 1/3%).

Footnote F14

These options vest in annual increments on 3/1/22 (33 1/3%); 3/1/23 (33 1/3%); and 3/1/24 (33 1/3%).

Footnote F15

These options vest in annual increments on 3/1/23 (33 1/3%); 3/1/24 (33 1/3%); and 3/1/25 (33 1/3%).

Footnote F2

Includes 30,449 shares of People's United restricted stock subject to time-based vesting conditions. Pursuant to the Merger Agreement, at the effective time of the Merger, such People's United restricted shares were converted into restricted shares of M&T common stock equal to the number of People's United restricted shares multiplied by the exchange ratio (rounded up or down to the nearest whole share). Except as provided in the Merger Agreement, all shares of M&T common stock received in respect of such shares of People's United restricted stock will remain subject to the same time-based vesting conditions applicable to the original award.

Footnote F3

Includes 5,324 shares owned indirectly through the People's United Financial, Inc. Employee Stock Ownership Plan (including 46 shares acquired through dividend reinvestment). Information is based on 3/31/2022 Plan statement.

Footnote F4

The reporting person was previously granted People's United performance share units which provided for delivery of shares of People's United's common stock upon the achievement of specified performance criteria. Pursuant to the Merger Agreement, at the effective time of the Merger, the People's United outstanding performance share units were deemed earned based on the greater of target and actual level of performance through the effective time of the Merger (as reasonably determined by the compensation committee of the People's United board of directors), and each such performance share unit was cancelled and the reporting person became entitled to receive time-vesting restricted share units denominated in shares of M&T common stock, as set forth in the Merger Agreement, in an amount calculated by multiplying the number of earned performance share units (including any applicable dividend equivalents) by the exchange ratio (rounded up or down to the nearest whole number).

Footnote F5

Pursuant to the Merger Agreement, at the effective time of the Merger, each outstanding share of Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series A, of People's United, was converted into the right to receive a share of M&T's Perpetual Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series H.

Footnote F6

At the effective time of the Merger, each outstanding option to purchase shares of People's United common stock (a "People's United Option") ceased to represent an option to purchase shares of People's United common stock and was converted into an option to purchase a number of shares of M&T common stock (an "M&T Option") equal to the product (rounded down to the nearest whole number) of (1) the number of shares of People's United common stock subject to such People's United Option immediately prior to the effective time of the Merger and (2) the exchange ratio, at an exercise price per share (rounded up to the nearest whole cent) equal to (a) the exercise price per share of People's United common stock of such People's United Option immediately prior to the effective time of the Merger divided by (b) the exchange ratio.

Footnote F7

These options vest in annual increments on 6/1/15 (33 1/3%); 6/1/16 (33 1/3%); and 6/1/17 (33 1/3%).

Footnote F8

These options vest in annual increments on 3/1/16 (33 1/3%); 3/1/17 (33 1/3%); and 3/1/18 (33 1/3%).

Footnote F9

These options vest in annual increments on 3/1/17 (33 1/3%); 3/1/18 (33 1/3%); and 3/1/19 (33 1/3%).