MANCHESTER, NH
ALLEGRO MICROSYSTEMS, INC.ALGM— Latest position per institution from SEC 13F filings
15
Institutional holders
139.74M
Total shares held
8.30B
Estimated value
6.99M
Avg. position size
FMR LLC
CIK 315066
Shares
25.58M
Value
1.78B
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
14.20M
Value
374.66M
Filed
Dec 31, 2025
BLACKROCK, INC.
CIK 2012383
Shares
13.89M
Value
966.97M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
13.68M
Value
952.29M
Filed
Jun 30, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
12.72M
Value
844.87M
Filed
Jun 30, 2026
CAPITAL RESEARCH GLOBAL INVESTORS
CIK 1422848
Shares
12.01M
Value
835.89M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
7.67M
Value
533.88M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
6.63M
Value
187.36M
Filed
Jun 30, 2024
STATE STREET CORP
CIK 93751
Shares
5.68M
Value
395.19M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
5.51M
Value
383.52M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
3.71M
Value
258.31K
Filed
Jun 30, 2026
CLEARBRIDGE INVESTMENTS, LLC
CIK 1348883
Shares
2.95M
Value
205.12M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.64M
Value
184.18M
Filed
Jun 30, 2026
MACQUARIE GROUP LTD
CIK 1418333
Shares
2.20M
Value
64.16M
Filed
Sep 30, 2025
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
2.12M
Value
147.85M
Filed
Jun 30, 2026
ANALOG CENTURY MANAGEMENT LP
CIK 1753384
Shares
1.89M
Value
49.86M
Filed
Dec 31, 2025
MORGAN STANLEY
CIK 895421
Shares
1.81M
Value
125.97M
Filed
Jun 30, 2026
KODAI CAPITAL MANAGEMENT LP
CIK 1999612
Shares
1.66M
Value
41.61M
Filed
Mar 31, 2025
LOOMIS SAYLES & CO L P
CIK 312348
Shares
1.62M
Value
112.78M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.58M
Value
109.66M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FMR LLC | 315066 | 25.58M | 1.78B | Jun 30, 2026 |
| 2 | VANGUARD GROUP INC | 102909 | 14.20M | 374.66M | Dec 31, 2025 |
| 3 | BLACKROCK, INC. | 2012383 | 13.89M | 966.97M | Jun 30, 2026 |
| 4 | INVESCO LTD. | 914208 | 13.68M | 952.29M | Jun 30, 2026 |
| 5 | JPMORGAN CHASE & CO | 19617 | 12.72M | 844.87M | Jun 30, 2026 |
| 6 | CAPITAL RESEARCH GLOBAL INVESTORS | 1422848 | 12.01M | 835.89M | Jun 30, 2026 |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 7.67M | 533.88M | Jun 30, 2026 |
| 8 | BLACKROCK FINANCE, INC. | 1364742 | 6.63M | 187.36M | Jun 30, 2024 |
| 9 | STATE STREET CORP | 93751 | 5.68M | 395.19M | Jun 30, 2026 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 5.51M | 383.52M | Jun 30, 2026 |
| 11 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 3.71M | 258.31K | Jun 30, 2026 |
| 12 | CLEARBRIDGE INVESTMENTS, LLC | 1348883 | 2.95M | 205.12M | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.64M | 184.18M | Jun 30, 2026 |
| 14 | MACQUARIE GROUP LTD | 1418333 | 2.20M | 64.16M | Sep 30, 2025 |
| 15 | DIMENSIONAL FUND ADVISORS LP | 354204 | 2.12M | 147.85M | Jun 30, 2026 |
| 16 | ANALOG CENTURY MANAGEMENT LP | 1753384 | 1.89M | 49.86M | Dec 31, 2025 |
| 17 | MORGAN STANLEY | 895421 | 1.81M | 125.97M | Jun 30, 2026 |
| 18 | KODAI CAPITAL MANAGEMENT LP | 1999612 | 1.66M | 41.61M | Mar 31, 2025 |
| 19 | LOOMIS SAYLES & CO L P | 312348 | 1.62M | 112.78M | Jun 30, 2026 |
| 20 | GOLDMAN SACHS GROUP INC | 886982 | 1.58M | 109.66M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.