This is a yellow stock certificate from the Transitron Electronic Corporation, issued in 1969. It has not been cancelled, sold as a collectable. 

Transitron Electronic Corporation was a semiconductor company founded in 1952 by brothers David and Leo Bakalar in Wakefield, Massachusetts. The company was early in the semiconductor industry, becoming one of the top producers of diodes, rectifiers, and transistors by the mid-1950s. 

One of Transitron's most important innovations was the gold-bonded germanium diode, which became widely used in computers and military equipment. The company was also at the forefront of silicon technology, claiming to have produced the world's first silicon rectifiers. These early successes in both germanium and silicon devices positioned Transitron as a major competitor to established electronics giants like General Electric, RCA, and Raytheon.

Transitron's rapid growth led to a highly anticipated initial public offering (IPO) on December 10, 1959.

The IPO was a resounding success, with 1,000,000 shares offered at $36 each being snapped up by investors in just 30 minutes. The IPO netted the Bakalar brothers $34.4 million for part of their interest in the company. They were dubbed "The Transistor Tycoon" by TIME Magazine in 1959

David Bakalar, received a Ph.D. in physical metallurgy from MIT, served as the president of Transitron from 1952 to 1984. Leo Bakalar, David's brother, acted as treasurer and chairman, with both brothers sharing equal decision-making power in the company's operations.

Transitron faced challenges in the 1960s as the semiconductor industry evolved. The company struggled to keep pace with the transition from germanium to silicon technology and later to integrated circuits. Although Transitron did produce integrated circuits and even developed a bipolar microprocessor, these efforts were not enough to maintain its competitive edge.

Transitron's decline continued through the 1970s and early 1980s. The company ultimately ceased operations in 1986, unable to adapt to the rapidly changing semiconductor landscape. Despite its eventual downfall, Transitron Electronic Corporation played a significant role in the early days of the semiconductor industry, contributing to the technological foundation that would shape the future of electronics.