GOODWILL AND INTANGIBLE ASSETS
Goodwill - The carrying amount of goodwill by reportable segment is as follows:
(Amounts in thousands)PipeInfiltrator International 
Allied Products
& Other
 Total
Balance at March 31, 2023
$68,797 $495,841 $10,420 $45,135 $620,193 
Disposal(3,031)— — — (3,031)
Currency translation— — 21 — 21 
Balance at March 31, 2024
65,766 495,841 10,441 45,135 617,183 
Acquisition— 103,676 — — 103,676 
Currency translation— — (636)— (636)
Balance at March 31, 2025
$65,766 $599,517 $9,805 $45,135 $720,223 
Intangible Assets - Intangible assets as of March 31, 2025 and 2024 consisted of the following:
 2025 2024
(Amounts in thousands)
Gross
Intangible
 Accumulated
Amortization
 
Net
Intangible
 
Gross
Intangible
 
Accumulated
Amortization
 
Net
Intangible
Definite-lived intangible assets           
Developed technology$212,200 $(93,783)$118,417 $170,200 $(75,554)$94,646 
Supplier and customer relationships481,100 (220,047)261,053 382,100 (189,853)192,247 
Patents and non-compete agreements3,738 (2,687)1,051 9,425 (7,873)1,552 
Trademarks and tradenames74,960 (19,260)55,700 67,977 (15,632)52,345 
Total definite lived intangible assets771,998 (335,777)436,221 629,702 (288,912)340,790 
Indefinite-lived intangible assets (a)
Trademarks11,839 — 11,839 11,862 — 11,862 
Total Intangible assets$783,837 $(335,777)$448,060 $641,564 $(288,912)$352,652 
(a)Indefinite-lived intangible assets may fluctuate as a result of foreign currency translation.
The following table presents the amortization expense and weighted average amortization period for definite-lived intangible assets at March 31, 2025:
 Amortization expense (in thousands) 
 Weighted Average
Amortization Period
(in years)
 202520242023 
Developed technology$18,230 $16,480 $16,390 6.3
Supplier and customer relationships30,207 30,460 34,523 9.7
Patents and non-compete agreements487 560 646 4.0
Trademarks and tradenames3,645 3,969 3,638 14.7
Total$52,569 $51,469 $55,197 
Future intangible asset amortization expense based on existing intangible assets at March 31, 2025 is:
 Fiscal Year    
(Amounts in thousands)2026 2027 2028 2029 2030 Thereafter Total
Amortization expense$53,840 $50,607 $48,675 $47,179 $34,959 $200,961 $436,221 

Historical Timeline

Fiscal YearFiled
2025May 15, 2025Showing above
2017May 30, 2017

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.