v3.26.3
STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Sep. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Weighted Average Assumptions for all Options Granted Estimated at Grant Date Using Black-Scholes-Merton Option-Pricing Model
The fair value of the Company’s employee stock options was estimated at the date of grant using a Black-Scholes option-pricing model with the following weighted average assumptions for all options granted during the periods presented in the table below:
Fiscal Years Ended September 30,
202620252024
Risk-free interest rate
3.9% to 4.5%
4.0% to 4.5%
4.1% to 4.7%
Expected life of options
6.5 years
6.5 years
6.5 years
Expected dividend yield of stock
—
—
—
Expected volatility of stock
32.5%
32.5%
33.5%
Summary of Activity, Pricing and Other Information for Performance Vested Stock-Based Award Activity The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2026:
Number of
Options		Weighted-Average
Exercise Price Per
Option		Weighted-Average
Remaining
Contractual  Term		Aggregate
Intrinsic Value
Outstanding at September 30, 2025759,608 $1,020.20 
Granted631,757 1,256.82 
Exercised(19,970)729.42 
Forfeited(127,777)1,153.67 
Expired(2,394)1,305.54 
Outstanding at September 30, 20261,241,224 $1,131.02 
8.3 years
$111,598,907 
Expected to vest747,635 $1,170.62 
8.6 years
$41,596,994 
Exercisable at September 30, 2026174,374 $866.87 
6.8 years
$47,466,690 
The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2026:
Number of
Options		Weighted-Average
Exercise Price Per
Option		Weighted-Average
Remaining
Contractual  Term		Aggregate
Intrinsic Value
Outstanding at September 30, 20253,230,926 $487.45 
Granted— — 
Exercised(495,226)281.30 
Forfeited(73,165)616.14 
Expired— — 
Outstanding at September 30, 20262,662,535 $522.25 
3.5 years
$1,676,206,812 
Expected to vest191,041 $670.36 
6.4 years
$79,803,044 
Exercisable at September 30, 20262,207,899 $422.39 
3.0 years
$1,459,127,942