Conversation so far:
What was the strike of 1913-14 in relation to John D. Rockefeller?
The strike of 1913-1914 was spurred by a unionization effort against John D. Rockefeller's Colorado Fuel and Iron Company's working conditions.
What was the result of the stike of 1913-1914 in Colorado?
The strike of 1913-1914 resulted in miners being displaced and living in tent cities adjacent to mining towns.
What was the Ludlow Massacre?
The Ludlow Massacre was a massacre by the Colorado National Guard and Colorado Fuel and Iron Company guards attacking a tent colony of 1,200 striking coal miners and their families.
Why did the Ludlow Massacre happen?
On April 20, 1914, a general fire-fight occurred between strikers and troops, which was antagonized by the troops and mine guards.
Who was responsible for the Ludlow Massacre?
Colorado National Guard and Colorado Fuel and Iron Company guards perpetrated the Ludlow Massacre
What was the result of all of the Ludlow Massacre happening?
Twenty-one people, including miners' wives and children, were killed in the Ludlow Massacre.
What was being said about Colorado because of the Ludlow Massacre?
The strike of 1913-1914 and Ludlow Massacre brought unwanted national attention to Colorado.
Was John D. Rockefeller able to recover after the Ludlow Massacre ?
John D. Rockefeller, Jr. hired public relations expert Ivy Lee, who developed a public relations strategy that Rockefeller, Jr.  followed to repair public sentiment.
What happened to John D. Rockefeller after the Ludlow Massacre?
John D. Rockefeller testified at the Walsh Commission that he wouldn't have prevent his guards from attacking strikers.
Was John D. Rockefeller ever jailed or fined for the Ludlow Massacre?
Lamont Montgomery Bowers, a Rockefellers' operative was relieved of his duties of managing Colorado Fuel and Iron Company's relations and Jesse F. Welborn was put into his role.
Did John D. Rockefeller just retire after the Ludlow Massacre?
Amid expansion into the Midwest for iron ore and ore transportation, Rockefeller began to think of retirement at age 63, and earned over $58 million in investments in 1902.

Question: Did he ever sell his company?
Self-contained rewrite: Did John D. Rockefeller ever sell the Standard Oil company?