Atwell

Legal name, DBA and former names

• Atwell, LLC.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Identifiers (UEI, state registrations)

• SAM UEI EXCGPEYB37N9 (as shown on the USAspending recipient record) and Texas TBPELS firm no. 12242.Source: usaspending.gov/recipient/0a2a7e5f-4d61-e93f-dc… · As of 2026-10-05

Ownership type

• PE-backed: Advent International announced on 2026-03-27 that it agreed, in partnership with management, to make a significant investment in Atwell, LLC.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Sponsor, parent or transaction

• Sponsor Advent International; the announcement said closing was expected in the second quarter of 2026 subject to regulatory approvals and closing conditions.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Employee count or band

• About 2,000 professionals, per Advent's announcement.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Services and markets

• Engineering, consulting and construction services for critical infrastructure across power and energy, community development, and commercial and digital infrastructure.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Leaders

• Matthew Bissett, President and Chief Executive Officer (named on the sponsor's announcement)Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Deals

• 2026-03-27: Advent International agreed to invest in Atwell (see ownership)Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Licences (board records)

• Texas TBPELS roster lists Atwell, LLC (firm no. 12242, type NS, expires 2027-07-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip · As of 2026-10-04

DOT prequalification

• TxDOT Active Precertified Firms lists ATWELL, LLC with 4 areas of certification, renewal status DECEMBER 13, 2023 ( ACTIVE )Source: dot.state.tx.us/des/precert/precrt1.htm · As of 2026-10-05

Federal awards (contracts)

• USAspending recipient record ATWELL LLC (Southfield, MI), contract award obligations: FY2021 $0, FY2022 $0, FY2023 $0, FY2024 $0, FY2025 $0 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/0a2a7e5f-4d61-e93f-dc… · As of 2026-10-05

Public filings

• DOL Form 5500 filings, plan year beginning 2025-01-01, NAICS 541330: Banks Engineering 401(k) Savings Plan (ACK_ID 20251029122540NAL0001192048001, 0 active participants); Atwell, Llc Savings And Profit Sharing Plan (ACK_ID 20251105091919NAL0021151714001, 1,357 active participants)Source: dol.gov/agencies/ebsa/about-ebsa/our-ac… · As of 2025-10-29

Rankings and awards

• Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi… · As of 2026-10-05

News timeline

• 2026-03-27: Advent International and Atwell announce partnership.Source: adventinternational.com/news/atwell-partners-with-adven… · As of 2026-03-27

Sources of record

1. https://www.adventinternational.com/news/atwell-partners-with-advent-international-to-accelerate-next-phase-of-growth/
2. https://www.usaspending.gov/recipient/0a2a7e5f-4d61-e93f-dca0-d12f8657e2c6-P/latest
3. https://www.milbank.com/en/news/milbank-advises-on-financing-supporting-advents-acquisition-of-atwell.html
4. https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
5. https://www.dot.state.tx.us/des/precert/precrt1.htm
6. https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/public-disclosure/foia/form-5500-datasets
7. https://www.enr.com/toplists/2026-top-500-design-firms-1