Rhumbline Advisers reports 0.12% decrease in ownership of 4RB / Blue Bird Corporation

Blue Bird Corporation

DE ˙ DB ˙ US0953061068

60,60 € ↓ -0,48 (-0,79%)

2026-06-05
DEL PRIS

Security	DE:4RB / Blue Bird Corporation
Institution	Rhumbline Advisers
Latest Disclosed Ownership	39,635 shares
Latest Disclosed Value	$ 2,250,859

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 39,635 shares of Blue Bird Corporation (DE:4RB) valued at $1,846,991 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 39,682 shares of Blue Bird Corporation. This represents a change in shares of -0.12% during the quarter. The current value of the position is $2,401,881 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-12	2026-03-31	13F	BLUE BIRD CORP COM	COM	095306106	39,635	-47	-0.12	2,251	20.64	0.0019
2026-02-13	2025-12-31	13F	BLUE BIRD CORP COM	COM	095306106	39,682	-6,930	-14.87	1,865	-30.46	0.0015
2025-11-06	2025-09-30	13F	BLUE BIRD CORP COM	COM	095306106	46,612	-1,667	-3.45	2,683	28.76	0.0022
2025-08-12	2025-06-30	13F	BLUE BIRD CORP COM	COM	095306106	48,279	3,277	7.28	2,084	43.06	0.0018
2025-05-29	2025-03-31	13F/A-1	BLUE BIRD CORP COM	COM	095306106	45,002	1,589	3.66	1,457	-13.18	0.0014
2025-04-08	2025-03-31	13F	BLUE BIRD CORP COM	COM	095306106	45,002	1,589		1,457		0.0014
2025-05-29	2024-12-31	13F/A-1	BLUE BIRD CORP COM	COM	095306106	43,413	817	1.92	1,677	-17.87	0.0015
2025-01-30	2024-12-31	13F	BLUE BIRD CORP COM	COM	095306106	43,413	817		1,677		0.0015
2024-11-12	2024-09-30	13F	BLUE BIRD CORP COM	COM	095306106	42,596	-525	-1.22	2,043	-12.06	0.0018
2024-08-01	2024-06-30	13F	BLUE BIRD CORP COM	COM	095306106	43,121	4,528	11.73	2,322	57.00	0.0022
2024-05-09	2024-03-31	13F	BLUE BIRD CORP COM	COM	095306106	38,593	3,045	8.57	1,480	54.38	0.0014
2024-02-08	2023-12-31	13F	BLUE BIRD CORP COM	COM	095306106	35,548	8,531	31.58	958	66.32	0.0010
2023-11-09	2023-09-30	13F	BLUE BIRD CORP COM	COM	095306106	27,017	850	3.25	577	-2.04	0.0007
2023-08-08	2023-06-30	13F	BLUE BIRD CORP COM	COM	095306106	26,167	3,703	16.48	588		0.0007
2023-05-11	2023-03-31	13F	BLUE BIRD CORP COM	COM	095306106	22,464	633	2.90	0	-100.00	0.0006
2023-02-14	2022-12-31	13F	BLUE BIRD CORP COM	COM	095306106	21,831	736	3.49	234	32.95	0.0003
2022-11-10	2022-09-30	13F	BLUE BIRD CORP COM	COM	095306106	21,095	1,416	7.20	176	-2.76	0.0003
2022-08-11	2022-06-30	13F	BLUE BIRD CORP COM	COM	095306106	19,679	518	2.70	181	-49.86	0.0003
2022-05-12	2022-03-31	13F	BLUE BIRD CORP COM	COM	095306106	19,161	-514	-2.61	361	17.21	0.0005
2022-02-10	2021-12-31	13F	BLUE BIRD CORP COM	COM	095306106	19,675	-431	-2.14	308	-26.49	0.0004
2021-11-12	2021-09-30	13F	BLUE BIRD CORP COM	COM	095306106	20,106	517	2.64	419	-13.96	0.0006
2021-08-05	2021-06-30	13F	BLUE BIRD CORP COM	COM	095306106	19,589	-1,800	-8.42	487	-8.97	0.0006
2021-05-06	2021-03-31	13F	BLUE BIRD CORP COM	COM	095306106	21,389	-1,140	-5.06	535	30.17	0.0007
2021-02-10	2020-12-31	13F	BLUE BIRD CORP COM	COM	095306106	22,529	2,519	12.59	411	69.14	0.0006
2020-11-12	2020-09-30	13F	BLUE BIRD CORP COM	COM	095306106	20,010	-3,023	-13.12	243	-29.57	0.0004
2020-08-13	2020-06-30	13F	BLUE BIRD CORP COM	COM	095306106	23,033	1,925	9.12	345	49.35	0.0006
2020-05-06	2020-03-31	13F	BLUE BIRD CORP COM	COM	095306106	21,108	0	0.00	231	-52.27	0.0005
2020-02-05	2019-12-31	13F	BLUE BIRD CORP COM	COM	095306106	21,108	50	0.24	484	20.70	0.0008
2019-10-23	2019-09-30	13F	BLUE BIRD CORP COM	COM	095306106	21,058	1,066	5.33	401	1.78	0.0007
2019-08-14	2019-06-30	13F	BLUE BIRD CORP COM	COM	095306106	19,992	647	3.34	394	20.12	0.0007
2019-05-01	2019-03-31	13F	BLUE BIRD CORP COM	COM	095306106	19,345	677	3.63	328	-3.53	0.0006
2019-01-31	2018-12-31	13F	BLUE BIRD CORP COM	COM	095306106	18,668	5,652	43.42	340	6.58	0.0007
2018-11-07	2018-09-30	13F	BLUE BIRD CORP COM	COM	095306106	13,016	-286	-2.15	319	7.41	0.0006
2018-08-06	2018-06-30	13F	BLUE BIRD CORP COM	COM	095306106	13,302	13,302		297		0.0006

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.