Biotech and Research Stocks

$Bristol-Myers Squibb (BMY.US)$ $Takeda Pharmaceutical (TAK.US)$ $PPD Inc (PPD.US)$ $Icon PLC (ICLR.US)$ Anyone have any input on some of these Biotech and Research stocks below. Some of them are trading at pretty high prices. Yet a few of them are priced low and was wondering if now would be a good time to get in and hold for a long time. Thank you for any input or discussion.

Bristol-Myers Squibb Company (BMY)

Takeda Pharmaceutical Company (TAK)

PPD Inc (PPD)

ICON Public Limited Company (ICLR)

Charles Rivers Laboratories International (CRL)

Laboratory Corporation of America (LH)

IDEXX Laboratories Inc (IDXX)

Bio-Rad Laboratories Inc (BIO)