| 2011-09-26 | National Gallery of Art | | $1.9M | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2015-08-05 | National Gallery of Art | | $1.4M | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2014-09-26 | National Gallery of Art | | $654K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2014-09-24 | National Gallery of Art | | $639K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2024-09-27 | National Gallery of Art | | $571K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2012-04-03 | National Gallery of Art | | $401K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2022-09-12 | National Gallery of Art | | $364K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2015-09-08 | National Gallery of Art | | $328K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2020-04-22 | National Gallery of Art | | $309K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2026-01-05 | National Gallery of Art | | $306K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2009-05-11 | National Gallery of Art | | $248K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2013-04-02 | National Gallery of Art | | $163K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2015-09-30 | National Gallery of Art | | $149K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2022-09-26 | National Gallery of Art | | $133K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2018-06-13 | National Gallery of Art | | $88K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2008-01-01 | National Gallery of Art | | $76K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2021-03-30 | National Gallery of Art | | $64K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2008-05-19 | National Gallery of Art | | $52K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2010-09-27 | National Gallery of Art | | $49K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2016-09-21 | National Gallery of Art | | $48K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2010-02-22 | National Gallery of Art | | $35K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2009-09-28 | National Gallery of Art | | $35K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2010-05-18 | National Gallery of Art | | $30K | PLUMBING, HEATING, AND AIR-CONDITIONING CONTRACTORS |
| 2013-09-27 | National Gallery of Art | | $29K | INDUSTRIAL AND COMMERCIAL FAN AND BLOWER AND AIR PURIFICATION EQUIPMENT MANUFACTURING |
| 2009-09-14 | National Gallery of Art | | $28K | OTHER AUTOMOTIVE MECHANICAL AND ELECTRICAL REPAIR AND MAINTENANCE |