American Airlines Group, AAL 02376RAE2 US02376RAE27, rated B1 qualifies for this since their HY paper is held by HYG.
Probably a great time to write malware hack and steal money from these companies listed in IG and HY ETF's since they'll be made whole apparently now no matter what malfeasance they were up to before hand.
However, lets keep in mind that since the announcement on March 23, frbny via loans through blackrock has yet to buy any corporate bonds in the secondary market as of April 8th ("Loans" > "Secondary credit") : https://www.federalreserve.gov/releases/h41/current/
Several IG airlines could have issued over the past few weeks but haven't for a reason. We have had a flood of IG new issuance and not a single airline or adjacent industry. CCL which basically has the same problems as airlines right now (gov basically making business illegal) was able to raise quite a bit of money. Difference is, they know that they aren't going to get bailed out.
And as of today my initial comment is out of date since DAL got downgraded.