X0306 4 2019-11-30 1 0000713671 DNB FINANCIAL CORP /PA/ DNBF 0001668004 Latoff Mary Demetor 1110 DEBRA'S WAY WEST CHESTER PA 19382 1 0 0 0 DNBF Common Stock $1 Par Value 2019-11-30 4 D 0 28281 D 0 D DNBF Common Stock $1 Par Value 2019-11-30 4 D 0 45286 D 0 I by Trust Disposed of pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and between Issuer and S&T Bancorp, Inc. ("S&T"). Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each award of restricted shares of Issuer common stock vested in full, all restrictions thereon lapsed, and each such award was converted into the right to receive 1.22 shares of common stock, par value $2.50 per share, of S&T having a market value of $37.72 per share on the effective time of the Merger. Shares held in the name of Marital Trust Under Will of William S. Latoff on which the filer is a trustee and life beneficiary. The reporting person's status as an insider terminated 11/30/2019 and therefore is no longer subject to Section 16. /s/ Gerald F Sopp for Mary D Latoff 2019-12-03