VANGUARD GROUP INC: MTRN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of VANGUARD GROUP INC on MTRN, newest first. How the timeline and the estimate are built.

VANGUARD GROUP INC held 2,517,580 MTRN shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

period ended2026-06-30
13F 2,517,580 shares
Change vs previous 13F +70,158 shares
0.01% of the 13F portfolio, value $748,703,117.
13F-HR 0002100121-26-001018 filed by VANGUARD PORTFOLIO MANAGEMENT LLC
Filed 2026-08-13 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC
- VANGUARD FIDUCIARY TRUST CO: 149,106 shares
- Vanguard Investments Australia, Ltd.: 5,215 shares
- VANGUARD ASSET MANAGEMENT, Ltd: 16,351 shares
- Vanguard Personalized Indexing Management, LLC: 3,928 shares
- Vanguard Global Advisers, LLC: 8,868 shares
- VANGUARD CAPITAL MANAGEMENT LLC: 937,553 shares
- VANGUARD PORTFOLIO MANAGEMENT LLC: 1,396,559 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2026-03-31
13F/A 2,447,422 shares
Change vs previous 13F +100,489 shares
0.01% of the 13F portfolio, value $354,019,592.
13F-HR 0002100121-26-000861 filed by VANGUARD PORTFOLIO MANAGEMENT LLC
Filed 2026-05-08 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC
- VANGUARD FIDUCIARY TRUST CO: 136,358 shares
- Vanguard Investments Australia, Ltd.: 4,873 shares
- VANGUARD ASSET MANAGEMENT, Ltd: 15,774 shares
- Vanguard Personalized Indexing Management, LLC: 3,817 shares
- Vanguard Global Advisers, LLC: 8,809 shares
- VANGUARD CAPITAL MANAGEMENT LLC: 927,858 shares
- VANGUARD PORTFOLIO MANAGEMENT LLC: 1,349,933 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-12-31
13F 2,346,933 shares
Change vs previous 13F -11,817 shares
<0.01% of the 13F portfolio, value $291,770,710.
13F-HR 0000102909-26-000031 filed by VANGUARD GROUP INC
Filed 2026-01-29 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC
- VANGUARD GROUP INC: 2,344,101 shares
- Vanguard Personalized Indexing Management, LLC: 2,832 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-09-30
13F 2,358,750 shares
Change vs previous 13F -27,104 shares
<0.01% of the 13F portfolio, value $284,960,587.
13F-HR 0000102909-25-000353 filed by VANGUARD GROUP INC
Filed 2025-11-07 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC
- VANGUARD GROUP INC: 2,355,979 shares
- Vanguard Personalized Indexing Management, LLC: 2,771 shares
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-06-30
13F 2,385,854 shares
Change vs previous 13F -91,517 shares
<0.01% of the 13F portfolio, value $189,365,231.
13F-HR 0001752724-25-185843 filed by VANGUARD GROUP INC
Filed 2025-08-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-03-31
13F 2,477,371 shares
Change vs previous 13F -45,770 shares
<0.01% of the 13F portfolio, value $202,153,473.
13F-HR 0001752724-25-099331 filed by VANGUARD GROUP INC
Filed 2025-05-09 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-12-31
13F 2,523,141 shares
Change vs previous 13F +25,888 shares
<0.01% of the 13F portfolio, value $249,488,182.
13F-HR 0001752724-25-022205 filed by VANGUARD GROUP INC
Filed 2025-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-09-30
13F 2,497,253 shares
Change vs previous 13F not available
0.01% of the 13F portfolio, value $279,342,720.
13F-HR 0001752724-24-248565 filed by VANGUARD GROUP INC
Filed 2024-11-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC
Acceptance time not in the bulk data set (spec §4.2).