The all-time high Principal Financial stock closing price was 75.04 on January 26, 2018. The Principal Financial 52-week high stock price is 60.81, which is 107.5% above the current share price. The Principal Financial 52-week low stock price is 29.17, which is 0.5% below the current share price. Principal Financial historical price data and PFG charts. Free real-time prices, trades, and chat. Principal Financial (PFG) stock price, charts, trades & the US's most popular discussion forums. Principal Financial Group (PFG) has the following price history information. Looking back at PFG historical stock prices for the last five trading days, on August 30, 2019, PFG opened at $53.58, traded as high as $53.98 and as low as $53.11, and closed at $53.22. Trading volume was a total of 1.20M shares.