KeyCorp, Philips 66 fall; Seagen, Insulet rise

Stocks that traded heavily or had substantial price changes Monday:

Seagen Inc. up $25.04 to $197.65.

Pfizer is buying the biotechnology company for $43 billion.

KeyCorp, down $4.28 to $11.38.

Regional banks fell amid fears over their strength following the collapse of Silicon Valley Bank and Signature Bank.

Illumina Inc., up $32.93 to $226.94.

Activist investor Carl Icahn is reportedly launching a proxy fight at the genetic testing tools company.

Insulet Corp., up $23.08 to $303.44.

The medical device company will replace SVB Financial Group in the S&P 500.

Qualtrics International Inc., up $1.13 to $17.68.

Silver Lake is buying the software company for about $12.5 billion.

Provention Bio Inc., up $17.40 to $24.10.

Pharmaceutical giant Sanofi is buying the biopharmaceutical company.

Newmont Corp., up $2.96 to $45.12.

The gold producer rose along with a jump in prices for the precious metal.

Phillips 66, down $5.70 to $95.52.

Energy companies slipped along with crude oil prices.

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