Hi, can you please explain - some insider "purchase" actions are marked with the additional "Acquisition" specifier, and some are not? **What's the difference?**
In example below [screenshots](https://imgur.com/a/xqU7gNA), note the difference:
[ALB](https://www.marketwatch.com/investing/stock/alb/company-profile):
* Nov 7, 2023 Purchase
* Kristin M. Coleman EVP, General Counsel
* **Acquisition** $121.86 PER SHARE
* 1,373 $167,314
[SU](https://www.marketwatch.com/investing/stock/su/company-profile):
* Dec 20, 2023 Purchase
* Shelley Powell
* $22.63 PER SHARE
* 13,940 $315,462
