In a regulatory filing, Northrop Grumman corporate VP of government relations Lesley A. Kalan disclosed the sale of 4,312 common shares of the company at a price of $286.70 per share.

Technical Comm Corp announced that the company received notice from the Nasdaq listing qualifications department of Nasdaq that, because the company had not yet filed its Form 10-Q for the period ended December 29, 2018 and because the company remains delinquent in filing its Form 10-K for the period ended September 29, 2018, the company was not in compliance with Nasdaq continued listing Rule 5250, which rule requires companies with securities listed on Nasdaq to timely file all required periodic reports with the U.S. Securities and Exchange Commission. Pursuant to such notice, the company will have until March 4 to submit a plan to Nasdaq to regain compliance; if the plan is accepted, Nasdaq can grant an exception of up to 180 days from the due date of the filing, or until July 15, to regain compliance. The company's failure to timely file its quarterly report on Form 10-Q for the fiscal quarter ended December 29, 2018 and annual report on Form 10-K for fiscal year ended September 29, 2018 is primarily due to certain changes to the company's revenue recognition which have impacted the filing of its 2018 Form 10-K, Q1 Form 10-Q and related financial statements, and the reliance on certain other previously issued financial statements. The company will complete the required filings as soon as practical after its current and former independent public accounting firms review and complete the audits of such financial statements. TCC is currently working with its current and former independent registered public accounting firms to complete such audits and restatements, and will provide information to Nasdaq in its plan to regain compliance as to the expected filing date of the annual report, although at this time the company does not have an estimate as to the date such filing will be made.

Kaiser Aluminum announced the appointment of Neal E. West as Senior Vice President and Chief Financial and Accounting Officer, effective today. Daniel J. Rinkenberger will serve as an advisor to the company through his planned retirement on March 31, 2019. Mr. West joined the company in 2008 and has served as the Vice President and Chief Accounting Officer since that time.

Bristol-Myers Squibb Company (BMY) announced that it has filed definitive proxy materials with the SEC in connection with the company's pending merger with Celgene Corporation (CELG). Bristol-Myers Squibb will commence mailing the joint proxy statement / prospectus to its stockholders on or about February 22. The Bristol-Myers Squibb Special Meeting of Stockholders is scheduled to take place on April 12. All stockholders of record of Bristol-Myers Squibb common stock as of the close of business on March 1 will be entitled to vote their shares either in person or by proxy at the stockholder meeting. The Bristol-Myers Squibb board believes this combination is in the best interests of the company and its stockholders, and recommends that stockholders vote "FOR" the approval of the issuance of shares of Bristol-Myers Squibb common stock in the merger, as well as all other proposals included on the enclosed WHITE proxy card. As previously announced on January 3, the combination of Bristol-Myers Squibb and Celgene will create a leading focused specialty biopharma company that is well positioned to address the needs of patients with cancer, inflammatory and immunologic disease and cardiovascular disease through high-value innovative medicines and leading scientific capabilities.

On February 22, 2019, Twitter announced that one of its co-founders, Evan Williams, has decided to step down as a member of its board of directors, effective at the end of the month. Mr. Williams said in a statement, "It's been an incredible 13 years, and I'm proud of what Twitter has accomplished during my time with the company. I will continue rooting for the team as I focus my time on other projects."