The mark consists of a stylized "W" resembling a DNA ladder to the left of the literal "The Welch Foundation." The stylized "W" is formed by a series of parallel, vertical lines of different lengths, all with rounded tops and bottom. From left to right, the first, seventh, and ninth lines are connected to a circle above each line by an hourglass-shaped design. From left to right, the second and third lines are connected to circles above and below each line by an hourglass-shaped design. From left to right, the fifth and eighth lines are connected to a circle below each line by an hourglass-shaped design. From left to right, smaller circles appear below the first, second, fourth, fifth, sixth, eighth, and ninth lines. From left to right, smaller circles appear above the second, third, fifth, sixth, seventh, and eighth lines.