Exhibit 4

Months to Lease by Size of Space

How many months office space took to lease, by the size of the block offered, over the three years to October 15, 2026.

Central LoopChicago office market
0 to 9,999 sf
13.6
11.1
10,000 to 19,999 sf
17.0
16.2
20,000 to 49,999 sf
13.8
16.1
50,000 to 99,999 sf
15.5
17.4
100,000+ sf
Central Loop: no reading
19.8
05101520

Months to lease

Source: CoStar, office market analytics, months to lease by block size over the three years to October 15, 2026, Central Loop and Chicago office market.

In the Central Loop, space took 13.6 to 17.0 months to lease across the block sizes measured. Across Chicago, blocks of 100,000 square feet or more took the longest, 19.8 months.
Months to Lease by Size of Space. How many months office space took to lease, by the size of the block offered, over the three years to October 15, 2026.
Block sizeCentral Loop, months to leaseChicago office market, months to lease
0 to 9,999 sf13.611.1
10,000 to 19,999 sf17.016.2
20,000 to 49,999 sf13.816.1
50,000 to 99,999 sf15.517.4
100,000+ sfno reading19.8
Horwath HTL — The New Floor 2026