Shares of Global Self Storage, Inc. (SELF) have lost 0.5% since the company reported its earnings for the quarter ended June 30, 2025, underperforming the S&P 500 Index’s 1.8% gain over the same period. Over the past month, the stock fell 1.6%, while the S&P 500 rose 3.2%.SELF’s Earnings SnapshotGlobal Self Storage posted total revenues of $3.2 million in the second quarter of 2025, up 2.7% from the year-ago period’s $3.1 million. Net income rose to $0.7 million, or $0.06 per diluted share, from $0.6 millio ...