As a HQ L11, I do believe it’s anonymous. However, your writing style can give you away so comments need to be carefully worded to maintain anonymity. I do believe that senior leaders are likely “highly encouraged” by HR to get their employees to fill out the survey. If the only people who fill out the survey are new, somewhat happy, recently promoted, etc, then HR and leadership get a message that all is good and no improvements are needed. But if everyone fills out the survey (even if you leave open ended questions blank or put No Comment) then your area gets a more realistic picture of how things are actually going. Leadership then assigns a group of employees to come up with solutions. Leadership reviews the solutions and approves them. Employees attempt to implement solutions. If things improve, leadership takes credit for improvement. If they don’t, leadership asks the group of employees for better ideas. Either way, at least a group of employees is trying hard to make life at work better for everyone. I think we would all be better off with ideas put in place by other employees than by senior leadership, so honestly, coming from a person not in HR, I would recommend filling out future surveys. I have been brutally honest on surveys for years and was not laid off.