Here is a copy of the preprinted form which is
showing the number of shares owned per account. It can be completed on the paper forms they mailed me and I mail back or I can go online to my accounts and pull up the offer for each account and fill out instantly and submit as shown below.
So I don't think you need to submit all of your shares, since the form itself states how many shares that account owns. There is always a chance, due to them making this deal so complex and confusing it is undersubscribed and one could potentially sell more than 4% of their shares. However my guess it is oversubscribed and they will buy less than 4% of your shares on a pro rata basis.
( Just F'ing with you on my number of shares owned, it is cut and paste so I can change that number here but not on the actual tender form which has my actual number of shares I own in this account}
I assume doing nothing is the same as officially declining the offer as shown below.
Submit Instructions for the FRONTERA ENERGY CORP F Tender Offer
Now that you have read the , you may submit your instructions below: You have total of 1,000,000 share(s) eligible for this offer. Please make your selection(s) below.