Security key
01749D105
ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM)
CUSIP: 01749D105
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 135,898,311
- Total 13F value
- $3,967,944,504
- Share change
- -10,260,799
- Put/Call ratio
- 771%
- SEC-reported price per share
- $29.20
- Number of holders
- 292
- Value change
- -$317,495,658
- Number of buys
- 141
- Number of sells
- 149
- Shares outstanding
- 185,278,416
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
292
Top holders
10
ALGM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
ALLEGRO MICROSYSTEMS, INC. SEC filings
ALLEGRO MICROSYSTEMS, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 01749D105
Recent filing periods:
Ownership snapshot
Top reported holders of ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
JPMORGAN CHASE & CO
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
12 Aug 2025
13F
13D/G
3/4/5
Lead comparable stake: 4.8%
13D/G row: JPMORGAN CHASE & CO
Showing 1-6 of 15 holder rows.
Quick read
JPMORGAN CHASE & CO leads the comparable SEC ownership view at 4.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens JPMORGAN CHASE & CO's linked filing trail.
Comparable ownership
Top 5
JPMORGAN CHASE & CO
4.8%
Yoshihiro Suzuki
0.12%
Joseph R. Martin
0.02%
Richard R. Lury
0.01%
Mary G. Puma
0.01%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| JPMORGAN CHASE & CO |
13F
13D/G
Company
|
4.8%
from 13D/G
|
$273,981,506
8,013,498 shares
|
— | 30 Jun 2025 |
| Yoshihiro Suzuki |
3/4/5
Director
|
0.12%
|
$7,850,465
213,560 shares
|
— | 07 Aug 2025 |
| Joseph R. Martin |
3/4/5
Director
|
0.02%
|
$1,293,180
35,179 shares
|
— | 07 Aug 2025 |
| Richard R. Lury |
3/4/5
Director
|
0.01%
|
$599,848
18,857 shares
|
-$222,673 | 12 Aug 2025 |
| Mary G. Puma |
3/4/5
Director
|
0.01%
|
$642,675
17,483 shares
|
— | 07 Aug 2025 |
| Jennie M. Raubacher |
3/4/5
Director
|
0.01%
|
$550,517
14,976 shares
|
— | 07 Aug 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
292
Shares
135,898,311
Rows available
292
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
270
Q3 2025 holders
292
Holder diff
22
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend