INTERNATIONAL BANCSHARES CRP (IBOC) Top Institutional Shareholders
INTERNATIONAL BANCSHARES CRP (IBOC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $2.71B in IBOC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of IBOC tracked by InsiderSet, reporting ownership valued at approximately $447.15M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $489.01M, representing an estimated gain of +9.36% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 66% of the total disclosed IBOC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, American Century Companies Inc, and several other long-term asset managers with concentrated positions in INTERNATIONAL BANCSHARES CRP (IBOC).
This page ranks the largest institutional IBOC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
287
Total Reported Value
$2.71B
Largest Holder
Blackrock, Inc.
Largest Position
$447.15M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
108
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 6,645,092 | $447,148,257 | $489,012,320 | +$41,864,063 | +9.36% | |
| Vanguard Portfolio Management Llc | 0.01% | 3,401,609 | $228,894,270 | $250,324,406 | +$21,430,136 | +9.36% | |
| American Century Companies Inc | 0.11% | 3,228,578 | $217,251,014 | $237,591,055 | +$20,340,041 | +9.36% | |
| Dimensional Fund Advisors Lp | 0.04% | 3,186,820 | $214,441,903 | $234,518,084 | +$20,076,181 | +9.36% | |
| State Street Corp | 0.01% | 2,624,894 | $176,629,117 | $193,165,949 | +$16,536,832 | +9.36% | |
| Vanguard Capital Management Llc | 0.00% | 2,474,514 | $166,510,047 | $182,099,485 | +$15,589,438 | +9.36% | |
| Geode Capital Management, Llc | 0.01% | 1,490,897 | $100,338,003 | $109,715,110 | +$9,377,107 | +9.35% | |
| Azora Capital Lp | 5.81% | 1,312,674 | $88,329,833 | $96,599,680 | +$8,269,847 | +9.36% | |
| First Trust Advisors Lp | 0.05% | 1,137,572 | $76,547,219 | $83,713,923 | +$7,166,704 | +9.36% | |
| Boston Trust Walden Corp | 0.60% | 1,087,661 | $73,188,722 | $80,040,973 | +$6,852,251 | +9.36% | |
| Goldman Sachs Group Inc | 0.01% | 923,919 | $62,170,492 | $67,991,199 | +$5,820,707 | +9.36% | |
| Tamar Securities, Llc | 5.46% | 756,940 | $50,934,512 | $55,703,215 | +$4,768,703 | +9.36% | |
| Reinhart Partners, Llc. | 1.44% | 745,696 | $50,178,978 | $54,875,769 | +$4,696,791 | +9.36% | |
| Millennium Management Llc | 0.04% | 712,435 | $47,939,751 | $52,428,092 | +$4,488,341 | +9.36% | |
| Charles Schwab Investment Management Inc | 0.01% | 704,033 | $47,374,381 | $51,809,788 | +$4,435,407 | +9.36% | |
| Northern Trust Corp | 0.01% | 666,974 | $44,880,680 | $49,082,617 | +$4,201,937 | +9.36% | |
| Aqr Capital Management Llc | 0.02% | 495,866 | $33,366,852 | $36,490,779 | +$3,123,927 | +9.36% | |
| Polaris Capital Management, Llc | 2.55% | 463,004 | $31,155,539 | $34,072,464 | +$2,916,925 | +9.36% | |
| Bank Of New York Mellon Corp | 0.01% | 448,252 | $30,162,883 | $32,986,865 | +$2,823,982 | +9.36% | |
| Panagora Asset Management Inc | 0.10% | 385,948 | $25,970,441 | $28,401,913 | +$2,431,472 | +9.36% | |
| Invesco Ltd. | 0.00% | 385,648 | $25,950,254 | $28,379,836 | +$2,429,582 | +9.36% | |
| Proshare Advisors Llc | 0.04% | 367,119 | $24,703,437 | $27,016,287 | +$2,312,850 | +9.36% | |
| Vanguard Fiduciary Trust Co | 0.01% | 355,996 | $23,954,971 | $26,197,746 | +$2,242,775 | +9.36% | |
| Morgan Stanley | 0.00% | 296,181 | $19,930,077 | $21,795,960 | +$1,865,883 | +9.36% | |
| Alliancebernstein L.P. | 0.00% | 219,967 | $14,614,607 | $16,187,372 | +$1,572,765 | +10.76% | |
| Cerity Partners Llc | 0.02% | 196,860 | $13,246,337 | $14,486,927 | +$1,240,590 | +9.37% | |
| Bank Of America Corp | 0.00% | 194,541 | $13,090,665 | $14,316,272 | +$1,225,607 | +9.36% | |
| Ubs Group Ag | 0.00% | 172,694 | $11,620,579 | $12,708,551 | +$1,087,972 | +9.36% | |
| Two Sigma Investments, Lp | 0.01% | 168,582 | $11,343,883 | $12,405,949 | +$1,062,066 | +9.36% | |
| Rhumbline Advisers | 0.01% | 168,247 | $11,321,315 | $12,381,297 | +$1,059,982 | +9.36% | |
| Kovack Advisors, Inc. | 0.51% | 140,193 | $9,514,899 | $10,316,803 | +$801,904 | +8.43% | |
| Qube Research & Technologies Ltd | 0.01% | 138,113 | $9,293,624 | $10,163,736 | +$870,112 | +9.36% | |
| Citadel Advisors Llc | 0.01% | 135,445 | $9,114,095 | $9,967,398 | +$853,303 | +9.36% | |
| Franklin Resources Inc | 0.00% | 132,676 | $8,927,769 | $9,763,627 | +$835,858 | +9.36% | |
| Maltese Capital Management Llc | 1.75% | 131,739 | $8,864,717 | $9,694,673 | +$829,956 | +9.36% | |
| Bridgewater Associates, Lp | 0.04% | 131,636 | $8,857,786 | $9,687,093 | +$829,307 | +9.36% | |
| Eldred Rock Partners, Llc | 2.18% | 127,460 | $8,576,783 | $9,379,781 | +$802,998 | +9.36% | |
| Nuveen, Llc | 0.00% | 125,865 | $8,469,456 | $9,262,405 | +$792,949 | +9.36% | |
| Principal Financial Group Inc | 0.00% | 121,768 | $8,193,768 | $8,960,907 | +$767,139 | +9.36% | |
| Jane Street Group, Llc | 0.01% | 121,076 | $8,147,204 | $8,909,983 | +$762,779 | +9.36% | |
| Denali Advisors Llc | 0.88% | 117,217 | $7,887,532 | $8,625,999 | +$738,467 | +9.36% | |
| Swiss National Bank | 0.00% | 110,700 | $7,449,003 | $8,146,413 | +$697,410 | +9.36% | |
| Voloridge Investment Management, Llc | 0.03% | 108,350 | $7,290,872 | $7,973,477 | +$682,605 | +9.36% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 107,679 | $7,245,720 | $7,924,098 | +$678,378 | +9.36% | |
| Squarepoint Ops Llc | 0.01% | 93,371 | $6,282,935 | $6,871,172 | +$588,237 | +9.36% | |
| Point72 Asset Management, L.P. | 0.01% | 90,186 | $6,068,616 | $6,636,788 | +$568,172 | +9.36% | |
| Bw Gestao De Investimentos Ltda. | 0.27% | 90,000 | $6,056,100 | $6,623,100 | +$567,000 | +9.36% | |
| Edgestream Partners, L.P. | 0.18% | 80,144 | $5,392,890 | $5,897,797 | +$504,907 | +9.36% | |
| Victory Capital Management Inc | 0.00% | 77,384 | $5,207,169 | $5,694,689 | +$487,520 | +9.36% | |
| Vest Financial, Llc | 0.06% | 75,115 | $5,054,488 | $5,527,713 | +$473,225 | +9.36% |
Frequently asked questions about IBOC
Who owns the most IBOC stock?
The largest holders of IBOC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for INTERNATIONAL BANCSHARES CRP (IBOC).
Is IBOC widely held by superinvestors?
Many widely followed stocks like IBOC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly IBOC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.