The following table presents our fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of December 31, 2025 and 2024, respectively:


	December 31, 2025
	Level 1		Level 2		NAV		Total
Corporate bond funds	$	88,307,169	$	—	$	—	$	88,307,169
Mutual funds	904,752,560		—		—		904,752,560
Common stock	—		19,393,850		—		19,393,850
Employer common stock	—		183,487,465		—		183,487,465
Common/collective trust funds measured at net asset value	—		—		2,092,518,755		2,092,518,755
Total investments	$	993,059,729	$	202,881,315	$	2,092,518,755	$	3,288,459,799


	December 31, 2024
	Level 1		Level 2		NAV		Total

Corporate bond funds	$	77,049,458	$	—	$	—	$	77,049,458
Mutual funds	834,381,730		—		—		834,381,730
Common stock	—		18,928,923		—		18,928,923
Employer common stock	—		188,134,992		—		188,134,992
Common/collective trust funds measured at net asset value	—		—		1,842,094,695		1,842,094,695
Total investments	$	911,431,188	$	207,063,915	$	1,842,094,695	$	2,960,589,798

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Tabular disclosure of fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

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+ Details