| SC 13G/A | 2018-02-09 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 2,796,021 | 8.6% | EDGAR |
| SC 13G/A | 2018-02-08 | VANGUARD GROUP INC | Aegion Corp | 3,062,798 | 9.4% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | Aegion Corp | 4,360,885 | 13.4% | EDGAR |
| SC 13G/A | 2017-02-09 | VANGUARD GROUP INC | Aegion Corp | 2,921,912 | 8.6% | EDGAR |
| SC 13G/A | 2017-02-09 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 3,014,375 | 8.9% | EDGAR |
| SC 13G/A | 2017-02-06 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 2,774,290 | 8.1% | EDGAR |
| SC 13G/A | 2017-01-12 | BlackRock Inc. | Aegion Corp | 4,311,920 | 12.7% | EDGAR |
| SC 13G/A | 2016-05-10 | BlackRock Inc. | Aegion Corp | 3,594,028 | 10.1% | EDGAR |
| SC 13G/A | 2016-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 2,111,120 | 5.8% | EDGAR |
| SC 13G/A | 2016-02-10 | VANGUARD GROUP INC | Aegion Corp | 2,719,814 | 7.5% | EDGAR |
| SC 13G/A | 2016-02-09 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 3,088,467 | 8.5% | EDGAR |
| SC 13G/A | 2016-01-25 | BlackRock Inc. | Aegion Corp | 3,527,200 | 9.7% | EDGAR |
| SC 13G/A | 2015-04-09 | Invesco Ltd. | Aegion Corp | 1,436,863 | 3.8% | EDGAR |
| SC 13G/A | 2015-02-17 | GUGGENHEIM CAPITAL LLC | Aegion Corp | 1,522,568 | 4.1% | EDGAR |
| SC 13G/A | 2015-02-13 | PRICE T ROWE ASSOCIATES INC /MD/ | Aegion Corp | 2,530,810 | 6.7% | EDGAR |
| SC 13G/A | 2015-02-13 | Kleinwort Benson Investors Dublin Ltd | Aegion Corp | 1,631,716 | 4.4% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | Aegion Corp | 2,465,307 | 6.6% | EDGAR |
| SC 13G | 2015-02-09 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | Aegion Corp | 10 | 12.0% | EDGAR |
| SC 13G/A | 2015-02-05 | DIMENSIONAL FUND ADVISORS LP | Aegion Corp | 3,129,733 | 8.4% | EDGAR |
| SC 13G/A | 2015-01-29 | Invesco Ltd. | Aegion Corp | 2,137,618 | 5.7% | EDGAR |