It depends on the share class of the fund. The I class is the low cost class (0.46%) and its ticker is PTTRX. There is also an Adm class (0.71%) which is PTRAX. There are at least a couple of other share classes too, but those are the two most popular share classes. The only difference in the two funds is the expense ratio, so the I class performs a little better.
The symbol you are speaking of is also their logo. Prudential core plus bond pimco fund also does 401ks too.
PIMCO Dynamic Income Fund (PDI)had its IPO in 2012.
Pimco High Income Fund (PHK)had its IPO in 2003.
As of July 2014, the market cap for Pimco High Income Fund (PHK) is $1,677,284,670.95.
As of July 2014, the market cap for Pimco Global Stocksplus & Income Fund (PGP) is $275,056,978.60.
The symbol for PIMCO Dynamic Income Fund in the NYSE is: PDI.
The symbol for Pimco Income Opportunity Fund in the NYSE is: PKO.
The symbol for PIMCO Income Strategy Fund in the NYSE is: PFL.
The symbol for PIMCO Municipal Income Fund in the NYSE is: PMF.
The symbol for Pimco High Income Fund in the NYSE is: PHK.
The symbol for PIMCO California Municipal Income Fund in the NYSE is: PCQ.
The symbol for Pimco Corporate & Income Opportunity Fund in the NYSE is: PTY.
The symbol for Pimco Corporate & Income Stategy Fund in the NYSE is: PCN.
The symbol for PIMCO Dynamic Credit Income Fund in the NYSE is: PCI.
The symbol for Pimco Global Stocksplus & Income Fund in the NYSE is: PGP.
The symbol for PIMCO Income Strategy Fund II in the NYSE is: PFN.
The symbol for Pimco Municipal Income Fund II in the NYSE is: PML.