International Bancshares Crp (IBOC) — Who's Buying and Selling (13F, Q2 2026)

IBOC ranks #2106 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.

IBOC is a top-conviction position for Tamar Securities, LLC — at 5.1% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.

The largest dollar stake in IBOC belongs to BlackRock, Inc., but the position matters far more to Tamar Securities, LLC, who has 5.1% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.

Bailard, Inc. has added to its IBOC position for two straight quarters, increasing it by $106.6K to reach $321.9K today.

IBOC is down 0.2% today, but institutions show net buying of $507.7M this quarter — a divergence between today's price move and the underlying institutional flow.

IBOC closed its latest fiscal year with net income of $412.3M, and currently trades at a P/E of 10.2.

• Profitable — net income of $412.3M in the latest fiscal year
• Revenue grew 0.7% year over year
• Net income improved year over year, from $409.2M to $412.3M
• Generated $491.1M in positive operating cash flow
• Liabilities run 3.61x equity — a highly leveraged balance sheet worth noting