The largest holder of Heico stock is BlackRock Advisors LLC, with 8.1 million shares (14.61% of the company), worth about $2.67 billion as of September 25, 2026. The 10 largest holders together own 67.1%.
In Q2 2026, 805 institutional holdings reports listed 69.6 million shares worth $15.50 billion.
Insiders reported 28 transactions in the last two years: 6 sales worth $40.83 million and 10 purchases. The newest one on file is from October 31, 2025 (Mendelson Victor H, Chief Executive Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through October 31, 2025.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 8.1 million | 14.61% | $2.7B |
| Fidelity Management & Research Co. LLC | 6.2 million | 11.30% | $2.1B |
| Herbert Wertheim7.441 % | 4.1 million | 7.44% | $1.4B |
| Estate of Laurans A. Mendelson | 4.0 million | 7.15% | $1.3B |
| T. Rowe Price International Ltd. | 3.3 million | 5.95% | $1.1B |
| Capital Research & Management Co. (International Investors) | 2.9 million | 5.23% | $956.0M |
| Vanguard Portfolio Management LLC | 2.2 million | 4.06% | $742.0M |
| Eric Mendelson4.028 % | 2.2 million | 4.03% | $737.0M |
| Victor Mendelson3.891 % | 2.1 million | 3.89% | $712.0M |
| Eaton Vance Management | 1.9 million | 3.49% | $638.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 805 | 69.6 million | $15.5B |
| Q1 2026 | 764 | 41.0 million | $11.0B |
| Q4 2025 | 785 | 40.3 million | $13.0B |
| Q3 2025 | 747 | 39.6 million | $12.7B |
| Q2 2025 | 737 | 39.5 million | $12.9B |
| Q1 2025 | 672 | 38.6 million | $10.3B |
| Q4 2024 | 642 | 39.2 million | $9.3B |
| Q3 2024 | 617 | 37.9 million | $9.9B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Mendelson Victor H | Oct 31, 2025 | Chief Executive Officer | Conversion of Exercise of derivative security at price 44.96 per share. | $3.6M |
| Mendelson Eric A | Oct 31, 2025 | Chief Executive Officer | Conversion of Exercise of derivative security at price 44.96 per share. | $3.6M |
| Mendelson Laurans A | Jul 15, 2025 | Officer, Director and Beneficial Owner | Sale at price 319.45 per share. | $18.0M |
| Mendelson Laurans A | Jun 5, 2025 | Officer and Director | Stock Gift at price 0.00 per share. | – |
| Schriesheim Alan | Jun 3, 2025 | Director | Sale at price 298.36 per share. | $10.4M |
| Schwitter Frank J | Jun 3, 2025 | Director | Sale at price 299.10 per share. | $106,481 |
| Neitzel Julie | Apr 24, 2025 | Director | Sale at price 246.23 per share. | $172,363 |
| Mendelson Laurans A | Apr 22, 2025 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
| Schriesheim Alan | Apr 22, 2025 | Director | Sale at price 239.57 per share. | $12.0M |
| Schwitter Frank J | Apr 22, 2025 | Director | Sale at price 238.02 per share. | $142,815 |
| Mendelson Laurans A | Apr 15, 2025 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
| Mendelson Laurans A | Mar 4, 2025 | Chief Executive Officer | Stock Gift at price 0.00 per share. | – |
Newest 12 of 28 insider transactions in the last two years.
BlackRock Advisors LLC, with 14.61% of the company (as of September 25, 2026). Next: Fidelity Management & Research Co. LLC (11.30%) and Herbert Wertheim7.441 % (7.44%).
805 institutional holdings reports listed Heico shares in Q2 2026, 69.6 million shares in all worth $15.50 billion.
In the last two years insiders reported 6 sales and 10 purchases (28 transactions in all); the newest on file is from October 31, 2025.