If you sort this list by revenues you will find ExxonMobil in the third place and Chevron in the 7th. First and second place taking into account only US companies. Therefore the impact on a market that already sees a strong concentration is relevant.
Did the anti-trust authorities make any comment on the announcements? What did US politicians say on the issue?
This question asked if the anti-trust authorities or any politician (actually I meant an elected official) expressed an opinion. It did not ask for the opinion of an anonimous user. Furthermore an opinion backed up by dressed up data is utterly useless. Please stick to the question, if none among anti-trust or elected politicians expressed any opinion an answer mentioning it is acceptable. It may be a sign that they are turning a blind eye.
BTW According to the data gathered from here the first four US companies account for more than 50% of the total revenue. In a such a big market which includes the US and a big chunk of the international market it is a sign that there is already a strong concentration. There is room to ask questions.