Latest Period
Q4 2025
Security Snapshot
ALLEGRO MICROSYSTEMS, INC. - Common Stock (ALGM) Institutional Ownership
CUSIP: 01749D105
13F Institutional Holders and Ownership History from Q4 2020 to Q1 2026
Institutions Reporting
293
Shares (Excl. Options)
136,543,901
Price
$26.38
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- Type / Class
- Equity / Common Stock
- Symbol
- ALGM on Nasdaq
- Shares outstanding
- 184,666,085
- Price per share
- $31.53
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 136,543,901
- Total reported value
- $3,603,601,123
- % of total 13F portfolios
- 0%
- Share change
- -1,070,983
- Value change
- -$37,869,933
- Number of holders
- 293
- Price from insider filings
- $31.53
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- ALGM - ALLEGRO MICROSYSTEMS, INC. - Common Stock is tracked under CUSIP 01749D105.
- 293 institutions reported positions in Q4 2025.
- 3 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 293 to 59 between Q4 2025 and Q1 2026.
- Reported value moved from $3,603,601,123 to $33,352,255.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 293 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 01749D105?
CUSIP 01749D105 identifies ALGM - ALLEGRO MICROSYSTEMS, INC. - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 01749D105:
Significant Owners of ALLEGRO MICROSYSTEMS, INC. - Common Stock (ALGM) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| FMR LLC | 13% | -12% | $623,510,987 | -$86,668,061 | 23,635,746 | -12% | FMR LLC | 31 Dec 2025 |
| Capital Research Global Investors | 7.1% | -17% | $410,252,327 | -$87,395,004 | 13,111,292 | -18% | Capital Research Global Investors | 31 Dec 2025 |
| JPMORGAN CHASE & CO | 4.8% | $172,976,792 | 8,995,153 | JPMORGAN CHASE & CO. | 31 Mar 2025 |
As of 31 Dec 2025, 293 institutional investors reported holding 136,543,901 shares of ALLEGRO MICROSYSTEMS, INC. - Common Stock (ALGM). This represents 74% of the company’s total 184,666,085 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of ALLEGRO MICROSYSTEMS, INC. - Common Stock (ALGM) together control 62% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 13% | 23,635,746 | -14% | 0.03% | $623,510,987 |
| VANGUARD GROUP INC | 7.7% | 14,202,528 | -0.64% | 0.01% | $374,662,689 |
| Capital Research Global Investors | 7.1% | 13,111,292 | -22% | 0.06% | $345,875,883 |
| BlackRock, Inc. | 6.6% | 12,201,457 | +7.2% | 0.01% | $321,874,446 |
| Invesco Ltd. | 4.1% | 7,651,051 | +44% | 0.03% | $201,834,725 |
| JPMORGAN CHASE & CO | 4% | 7,347,422 | -5% | 0.01% | $193,825,019 |
| STATE STREET CORP | 2.9% | 5,359,488 | +1.5% | 0% | $141,383,293 |
| Clearbridge Investments, LLC | 1.6% | 2,916,785 | -0.55% | 0.06% | $76,944,799 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.5% | 2,803,944 | +78% | 0.11% | $73,968,043 |
| CITADEL ADVISORS LLC | 1.4% | 2,560,520 | +672% | 0.05% | $67,546,518 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.3% | 2,393,968 | +1% | 0% | $63,165,468 |
| MORGAN STANLEY | 1.2% | 2,233,136 | +15% | 0% | $58,910,171 |
| DIMENSIONAL FUND ADVISORS LP | 1.2% | 2,140,147 | +8.6% | 0.01% | $56,461,794 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.1% | 2,036,212 | 0% | 0.08% | $53,715,000 |
| Analog Century Management LP | 1% | 1,890,072 | +61% | 2.5% | $49,860,099 |
| PRINCIPAL FINANCIAL GROUP INC | 0.94% | 1,742,296 | -9% | 0.02% | $45,961,768 |
| NORGES BANK | 0.79% | 1,457,805 | 0% | $38,456,896 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.74% | 1,362,418 | +5.2% | 0.01% | $35,940,587 |
| MILLENNIUM MANAGEMENT LLC | 0.73% | 1,341,739 | +67% | 0.03% | $35,395,075 |
| SEGALL BRYANT & HAMILL, LLC | 0.68% | 1,248,310 | -5.7% | 0.45% | $32,930,418 |
| ALLIANCEBERNSTEIN L.P. | 0.62% | 1,148,652 | -57% | 0.01% | $30,301,440 |
| Point72 Asset Management, L.P. | 0.61% | 1,119,265 | +13% | 0.05% | $29,526,211 |
| WELLINGTON MANAGEMENT GROUP LLP | 0.6% | 1,106,337 | -4.7% | 0.01% | $29,185,170 |
| NORTHERN TRUST CORP | 0.55% | 1,014,999 | +0.41% | 0% | $26,775,673 |
| VOYA INVESTMENT MANAGEMENT LLC | 0.51% | 940,358 | -0.18% | 0.02% | $24,806,644 |
Institutional Holders of ALLEGRO MICROSYSTEMS, INC. - Common Stock (ALGM) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 1,057,377 | $33,352,255 | +$2,729,473 | $31.53 | 59 |
| 2025 Q4 | 136,543,901 | $3,603,601,123 | -$37,869,933 | $26.38 | 293 |
| 2025 Q3 | 135,898,311 | $3,967,944,504 | -$317,495,658 | $29.20 | 292 |
| 2025 Q2 | 146,056,579 | $4,992,929,892 | -$219,199,122 | $34.19 | 270 |
| 2025 Q1 | 156,311,335 | $3,927,728,563 | +$388,307,479 | $25.13 | 288 |
| 2024 Q4 | 142,070,976 | $3,106,108,365 | -$93,131,573 | $21.86 | 252 |
| 2024 Q3 | 142,653,950 | $3,322,662,692 | +$662,040,174 | $23.30 | 243 |
| 2024 Q2 | 107,229,247 | $3,029,954,806 | +$94,075,184 | $28.24 | 266 |
| 2024 Q1 | 103,930,579 | $2,801,496,390 | +$196,028,499 | $26.96 | 272 |
| 2023 Q4 | 96,322,663 | $2,913,583,833 | +$74,962,541 | $30.27 | 286 |
| 2023 Q3 | 80,834,492 | $2,581,507,429 | -$9,857,061 | $31.94 | 305 |
| 2023 Q2 | 97,600,191 | $4,405,747,760 | +$855,781 | $45.14 | 347 |
| 2023 Q1 | 97,246,444 | $4,665,848,181 | +$97,194,449 | $47.99 | 306 |
| 2022 Q4 | 96,526,699 | $2,897,890,986 | +$193,662,088 | $30.02 | 217 |
| 2022 Q3 | 90,508,830 | $1,977,725,120 | +$37,072,148 | $21.85 | 168 |
| 2022 Q2 | 88,493,474 | $1,831,183,026 | -$24,643,454 | $20.69 | 161 |
| 2022 Q1 | 89,244,064 | $2,536,743,300 | +$71,940,131 | $28.40 | 168 |
| 2021 Q4 | 87,969,961 | $3,182,089,446 | -$39,880,903 | $36.18 | 162 |
| 2021 Q3 | 84,674,887 | $2,706,520,358 | +$151,110,004 | $31.96 | 149 |
| 2021 Q2 | 80,009,678 | $2,216,241,164 | +$115,088,327 | $27.70 | 124 |
| 2021 Q1 | 77,963,176 | $1,976,368,423 | +$421,333,763 | $25.35 | 120 |
| 2020 Q4 | 29,935,709 | $798,095,898 | +$794,627,864 | $26.66 | 91 |