| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2017-02-09 | STATE STREET CORP | NATIONAL FUEL GAS CO | - | 6.1% | EDGAR |
| SC 13G/A | 2017-01-25 | BlackRock Inc. | NATIONAL FUEL GAS CO | 6,596,217 | 7.7% | EDGAR |
| SC 13D/A | 2016-11-28 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,367,400 | 4.0% | EDGAR |
| SC 13D/A | 2016-11-10 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,369,400 | 4.0% | EDGAR |
| SC 13D/A | 2016-02-29 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,492,500 | 4.1% | EDGAR |
| SC 13G | 2016-02-16 | STATE STREET CORP | NATIONAL FUEL GAS CO | - | 6.8% | EDGAR |
| SC 13G/A | 2016-02-10 | VANGUARD GROUP INC | NATIONAL FUEL GAS CO | 6,046,654 | 7.1% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | NATIONAL FUEL GAS CO | 5,978,862 | 7.1% | EDGAR |
| SC 13G | 2015-02-12 | STATE STREET CORP | NATIONAL FUEL GAS CO | - | 5.2% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | NATIONAL FUEL GAS CO | 5,549,058 | 6.6% | EDGAR |
| SC 13G/A | 2015-01-30 | BlackRock Inc. | NATIONAL FUEL GAS CO | 5,243,078 | 6.2% | EDGAR |
| SC 13D/A | 2014-09-12 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,795,942 | 4.5% | EDGAR |
| SC 13D/A | 2014-05-09 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,787,042 | 4.5% | EDGAR |
| SC 13D/A | 2014-04-22 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,795,042 | 4.5% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | NATIONAL FUEL GAS CO | 5,102,566 | 6.1% | EDGAR |
| SC 13G/A | 2014-01-30 | BlackRock Inc. | NATIONAL FUEL GAS CO | 4,839,721 | 5.8% | EDGAR |
| SC 13G | 2013-02-12 | VANGUARD GROUP INC | NATIONAL FUEL GAS CO | 4,191,484 | 5.0% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | NATIONAL FUEL GAS CO | 4,241,076 | 5.1% | EDGAR |
| SC 13G/A | 2012-08-09 | BlackRock Inc. | NATIONAL FUEL GAS CO | 4,034,086 | 4.8% | EDGAR |
| SC 13D/A | 2012-07-10 | GAMCO INVESTORS, INC. ET AL | NATIONAL FUEL GAS CO | 3,714,674 | 4.5% | EDGAR |