ALLEGRO MICROSYSTEMS, INC. - Common Stock, par value $0.01 per share (ALGM)

CUSIP: 01749D105

Q4 2025 13F Holders as of 31 Dec 2025

Security type / class
Equity / Common Stock, par value $0.01 per share
Total 13F shares
136,544,024
Total 13F value
$3,603,604,368
Holder snapshot 6 visible 7 signals
Share change
-1,072,060
Put/Call ratio
270%
SEC-reported price per share
$26.38
Number of holders
294
Value change
-$37,898,347
Number of buys
126
Open additional details 1 more signal available
Number of sells
173
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
187,198,132

Security key

01749D105

Report period

Q4 2025

Institutions

294

Top holders

10

ALGM full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2026 Previous quarter: Q3 2025 ALLEGRO MICROSYSTEMS, INC. SEC filings ALLEGRO MICROSYSTEMS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of ALGM - ALLEGRO MICROSYSTEMS, INC. - Common Stock, par value $0.01 per share (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
Capital Research Global I...
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Sep 2025
13F 13D/G 3/4/5 Lead comparable stake: 7.1% 13D/G row: Capital Research Global Investors Showing 1-6 of 15 holder rows.

Quick read

Capital Research Global Investors leads the comparable SEC ownership view at 7.1%.

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 Capital Research Global Investors's linked filing trail.
Comparable ownership Top 5
Capital Research Global Investors 7.1%
Yoshihiro Suzuki 0.11%
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
Capital Research Global Investors
13F 13D/G
Company
13F 13D/G
7.1%
from 13D/G
$491,281,882
16,824,722 shares
 — 30 Sep 2025
Yoshihiro Suzuki
3/4/5
Director
3/4/5
0.11%
$7,850,465
213,560 shares
 — 07 Aug 2025
Joseph R. Martin
3/4/5
Director
3/4/5
0.02%
$1,293,180
35,179 shares
 — 07 Aug 2025
Richard R. Lury
3/4/5
Director
3/4/5
0.01%
$599,848
18,857 shares
 -$222,673 12 Aug 2025
Mary G. Puma
3/4/5
Director
3/4/5
0.01%
$642,675
17,483 shares
 — 07 Aug 2025
Jennie M. Raubacher
3/4/5
Director
3/4/5
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 Q4 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
294
Shares
136,544,024
Rows available
294
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 Q4 2025 vs Q3 2025 Across Filers

Q3 2025 holders
292
Q4 2025 holders
294
Holder diff
2
Investor Q3 2025 Shares Q4 2025 Shares Share Diff Share Chg % Q3 2025 value Q4 2025 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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