STATE OF MICHIGAN RETIREMENT SYSTEM

Pension

Position in BRK-B — Berkshire Hathaway Inc

CIK 762152 EAST LANSING, MI

Back to BRK-B Full portfolio

Position in BRK-B

as of Jun 30, 2026 · filed Jul 30, 2026 Compact

Position Value

$164,792,938

-$81,261,518 QoQ

Shares Held

329,329

-3.1% QoQ

Ownership

0.023%

of shares outstanding

% of Portfolio

0.80%

of 13F equity value

Holder Rank

#248

of 4,965 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in BRK-B Over Time

Shares Held

Position Value (USD)

Position in Insurance - Diversified

Financial Services · as of Jun 30, 2026

STATE OF MICHIGAN RETIREMENT SYSTEM holds $195,896,156 across 4 Insurance - Diversified names. BRK-B ranks #1 (84.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BRK-B	Berkshire Hathaway Inc This page	329,329	$164,792,938
2	AIG	American International Group, Inc.	150,867	$11,244,117
3	HIG	Hartford Insurance Group, Inc.	77,641	$10,288,985
4	ACGL	Arch Capital Group Ltd.	98,600	$9,570,116

All Filings in BRK-B

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50 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$164,792,938	329,329	-3.0%	Shares	Sole	2026-07-30
2026-03-31 BRK-A	$83,304,240	116	0.0%	Shares	Sole	2026-05-04
2026-03-31	$162,750,216	339,629	-0.0%	Shares	Sole	2026-05-04
2025-12-31 BRK-A	$87,556,800	116	0.0%	Shares	Sole	2026-01-29
2025-12-31	$170,764,781	339,729	-1.2%	Shares	Sole	2026-01-29
2025-09-30 BRK-A	$87,487,200	116	0.0%	Shares	Sole	2025-11-05
2025-09-30	$172,957,139	344,029	-0.7%	Shares	Sole	2025-11-05
2025-06-30 BRK-A	$84,540,800	116	0.0%	Shares	Sole	2025-08-05
2025-06-30	$168,333,392	346,529	+0.3%	Shares	Sole	2025-08-05
2025-03-31 BRK-A	$92,619,272	116	0.0%	Shares	Sole	2025-04-30
2025-03-31	$183,915,318	345,329	+0.0%	Shares	Sole	2025-04-30
2024-12-31 BRK-A	$78,986,720	116	0.0%	Shares	Sole	2025-02-06
2024-12-31	$156,485,401	345,229	-1.9%	Shares	Sole	2025-02-06
2024-09-30 BRK-A	$80,176,880	116	0.0%	Shares	Sole	2024-11-04
2024-09-30	$161,932,815	351,829	+1.1%	Shares	Sole	2024-11-04
2024-06-30 BRK-A	$71,019,956	116	0.0%	Shares	Sole	2024-07-26
2024-06-30	$141,618,877	348,129	-5.6%	Shares	Sole	2024-07-26
2024-03-31 BRK-A	$73,595,040	116	0.0%	Shares	Sole	2024-04-18
2024-03-31	$155,024,277	368,649	+1.0%	Shares	Sole	2024-04-18
2023-12-31 BRK-A	$62,944,500	116	0.0%	Shares	Sole	2024-01-23
2023-12-31	$130,127,044	364,849	-0.8%	Shares	Sole	2024-01-23
2023-09-30 BRK-A	$61,651,332	116	0.0%	Shares	Sole	2023-10-27
2023-09-30	$128,892,534	367,949	+2.9%	Shares	Sole	2023-10-27
2023-06-30 BRK-A	$60,065,960	116	0.0%	Shares	Sole	2023-07-26
2023-06-30	$121,992,409	357,749	-1.6%	Shares	Sole	2023-07-26
2023-03-31 BRK-A	$54,009,600	116	0.0%	Shares	Sole	2023-04-28
2023-03-31	$112,283,901	363,649	+1.4%	Shares	Sole	2023-04-28
2022-12-31 BRK-A	$54,370,476	116	0.0%	Shares	Sole	2023-01-27
2022-12-31	$110,755,786	358,549	+0.1%	Shares	Sole	2023-01-27
2022-09-30 BRK-A	$47,150,520	116	0.0%	Shares	Sole	2022-10-24
2022-09-30	$95,659,647	358,249	-0.2%	Shares	Sole	2022-10-24
2022-06-30 BRK-A	$47,438,200	116	0.0%	Shares	Sole	2022-08-08
2022-06-30	$98,027,557	359,049	+10.3%	Shares	Sole	2022-08-08
2022-03-31 BRK-A	$61,354,836	116	0.0%	Shares	Sole	2022-05-04
2022-03-31	$114,924,788	325,649	+0.7%	Shares	Sole	2022-05-04
2021-12-31 BRK-A	$52,276,792	116	0.0%	Shares	Sole	2022-01-27
2021-12-31	$96,685,238	323,362	-6.5%	Shares	Sole	2022-01-27
2021-09-30 BRK-A	$47,719,964	116	0.0%	Shares	Sole	2021-10-27
2021-09-30	$94,344,986	345,662	-3.2%	Shares	Sole	2021-10-27
2021-06-30 BRK-A	$48,557,716	116	0.0%	Shares	Sole	2021-07-27
2021-06-30	$99,234,671	357,062	-44.5%	Shares	Sole	2021-07-27
2021-03-31 BRK-A	$44,741,432	116	0.0%	Shares	Sole	2021-07-27
2021-03-31	$164,436,331	643,662	+0.0%	Shares	Sole	2021-07-27
2020-12-31 BRK-A	$40,346,540	116	0.0%	Shares	Sole	2021-07-27
2020-12-31	$149,199,533	643,462	-8.2%	Shares	Sole	2021-07-27
2020-09-30 BRK-A	$37,120,116	116	0.0%	Shares	Sole	2020-10-26
2020-09-30	$149,258,589	700,942	+1.3%	Shares	Sole	2020-10-26
2020-06-30 BRK-A	$31,006,800	116	0.0%	Shares	Sole	2020-07-29
2020-06-30	$123,518,566	691,942	—	Shares	Sole	2020-07-29
2020-03-31 BRK-A	$31,552,000	116	—	Shares	Sole	2020-05-01
No filing history on record for this holder in this stock.