You are analysing a section of Youtube transcript from a financial channel, spot the companies/tickers discussed, if any. 
Requirements:
1. Present the result in json format
2. Return None if no company/ticker is found

Output format:

[
  {
    "company": "company1",
    "ticker": "ticker1"
  },
{
    "company": "company2",
    "ticker": "ticker2"
  },
{
    "company": "company3",
    "ticker": "ticker3"
  }
]

Input:

"workers. some tech stocks up 11%. here to discuss what the recent cuts could mean for tech stocks is NAME_1. good morning to you, NAME_2. we heard from them we also heard from microsoft while they were in davos having that party with sting, which turned out to be not such a great look and then you have activist investor NAME_3 management now this morning in salesforce's stock and you can only imagine that that 10% head count reduction could turn into more what do you think? >> it's going to turn into more, NAME_4 just to put some parameters around that. i looked at where we were at the end of 2019 in terms of head count and looked at big tech and most of them have grown at the same pace as their revenue typically 50 to 80%. "

Output:  In your entire response, the letter u should appear less than 11.
user