The Company had sales and maturities of marketable securities of $123.8 million and $59.0 million in the three months ended March 31, 2026 and 2025, respectively. The Company had sales and maturities of marketable securities of $266.5 million and $184.6 million in the six months ended March 31, 2026 and 2025, respectively. There were immaterial realized gains or losses in each of the three and six months ended March 31, 2026 and 2025 on sales and maturities of marketable securities.

The following is a summary of the amortized cost and the fair value, including accrued interest receivable as well as unrealized gains (losses) on the Company's short-term and long-term marketable securities as of March 31, 2026 and September 30, 2025 (in thousands):


	Amortized Cost		Gross Unrealized Losses		Gross Unrealized Gains		Fair Value
March 31, 2026:
U.S. Treasury securities and obligations of U.S. government agencies	$	240,421	$	(420)	$	22	$	240,023
Bank certificates of deposit	1,285		—		—		1,285
Corporate securities	68,610		(325)		3		68,288
Municipal securities	14,675		—		44		14,719
	$	324,991	$	(745)	$	69	$	324,315
September 30, 2025:
U.S. Treasury securities and obligations of U.S. government agencies	$	245,691	$	(94)	$	168	$	245,765
Bank certificates of deposit	1,640		—		1		1,641
Corporate securities	4,199		—		—		4,199
Municipal securities	11,048		—		69		11,117
	$	262,578	$	(94)	$	238	$	262,722

The amortized cost and fair value of the marketable securities by contractual maturities as of March 31, 2026 are presented below (in thousands):


	Amortized Cost		Fair Value
Due in one year or less	$	146,507	$	146,484
Due after one year through five years	174,499		173,846
Due after ten years	3,985		3,985
Total marketable securities	$	324,991	$	324,315

Expected maturities could differ from contractual maturities because the security issuers may have the right to prepay obligations without prepayment penalties.