UNITIL Corporation
Ownership
Ownership Structure
Who owns UNITIL Corporation (UTL)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.7% of the shares are freely tradable; institutional investors hold 83.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.54 | 2,833,535 | -13.2 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.44 | 810,144 | +0.0 | 03/31/2026 |
| State Street Corp | 4.03 | 734,927 | +1.9 | 03/31/2026 |
| Frontier Capital Management CO Inc | 3.03 | 553,320 | +0.8 | 06/30/2026 |
| Manufacturers Life Insurance Co | 2.80 | 511,033 | -2.9 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.78 | 507,782 | +0.0 | 03/31/2026 |
| Wellington Management Company LLP | 2.70 | 491,474 | -18.4 | 06/30/2026 |
| Renaissance Technologies Corp | 2.69 | 490,041 | +23.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.03 | 1,099,064 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.21 | 584,682 | +1.5 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.