City contract vendors / Who gets the city's money
Aor Transit — City of Chicago contracts
Every contract the City of Chicago has on file with this vendor: what was awarded, which departments issued it, and how the awards were procured. Figures are computed live from the city's official contracts dataset.
Recorded in city contract data as AOR TRANSIT.
$1,902,435,065
Total awarded
Net of revisions and de-obligations
30
Contracts on file
Earliest approved Jul 18, 1994
$1,050,000,000
Largest single award
Jul 13, 2026
Most recent approval
A note on the totals: the city files revisions and de-obligations as their own records with negative award amounts, so the total above is the net of awards and adjustments. An awarded amount is also not money paid — it is the ceiling the city agreed to, and actual spending can come in lower.
Departments, by total awarded
- Chicago Department Of Aviation$1,853,245,663
Largest individual contracts
- (Spec 1318223) Operation and Maintenance of the Airport Transit System (ATS) at Chi… — 2026$1,050,000,000
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2018$115,300,000
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2011$115,000,000
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2020$112,000,000
- T0929550101 OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM — 2006$93,181,283
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2025$86,400,000
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2024$85,819,813
- OPERATION AND MAINTENANCE OF AIRPORT TRANSIT SYSTEM (ATS) at O'HARE, Spec# 92543, R… — 2023$55,000,000
How the work was procured
- RFQ13 contracts
- SOLE SOURCE1 contracts
Contract types
- PRO SERV CONSULTING $250,000orABOVE20 contracts
- Construction1 contracts
- PRO SERV-AVIATION1 contracts
Aor Transit contracts most heavily with Chicago Department Of Aviation, which accounts for $1,853,245,663 across 22 contract records.
Aor Transit contracts FAQ
- How much has Chicago awarded to Aor Transit?
- City of Chicago contract records show $1,902,435,065 awarded to Aor Transit across 30 contract records approved since Jul 18, 1994. That figure is the net of awards and later adjustments, and an award is not the same as money actually paid out.
- Which city departments contract with Aor Transit?
- By total award amount, the departments contracting with Aor Transit are: Chicago Department Of Aviation ($1,853,245,663).
- What is the largest Aor Transit contract?
- The largest single award on file is $1,050,000,000, described by the city as "(Spec 1318223) Operation and Maintenance of the Airport Transit System (ATS) at Chicago O'Hare International Airport", approved Jul 13, 2026, through Chicago Department Of Aviation.
- Why can a contract amount be negative?
- The city records revisions and de-obligations as separate rows with negative award amounts. That means a vendor total is the net of original awards plus every later adjustment, not a running tally of payments. Awarded dollars are also not the same as dollars spent — a contract can be awarded and only partly drawn down.
Source
- City Contractsupdated dailyofficial portal ↗
Contracts are matched on the vendor name exactly as the city records it, so a company filed under more than one spelling may appear on more than one page. Award amounts can be negative on revisions and de-obligations; totals are the net of awards and adjustments, not payments made.