13F reference period
Q2 2026
Security Snapshot
ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM) Institutional Ownership
CUSIP: 01749D105
13F Institutional Holders and Ownership History from Q4 2020 to Q3 2026
Institutions Reporting
375
Shares (Excl. Options)
147.02M
Full value: 147,020,352 · shares · 30 Jun 2026Price
$69.62
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- ALGM on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 147,020,352
- Total 13F value
- $10,189,070,650
- Portfolio coverage rank
- 0%
- Share change
- +10,428,183
- Value change
- +$780,428,866
- Number of holders
- 375
- Shares outstanding
- 187,039,843
- SEC-reported price per share
- $36.35
- Insider filing price
- $36.35
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK is tracked under CUSIP 01749D105.
- 375 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 320 to 375 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$4.32B
Full value: $4,323,319,972 · USD · 31 Mar 2026.$10.19B
Full value: $10,189,070,650 · USD · 30 Jun 2026
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 375 institutions filings for Q2 2026.
Security key
01749D105
13F reference period
Q2 2026
13F holders
375
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
ALGM full holder history
ALLEGRO MICROSYSTEMS, INC. SEC filings
ALLEGRO MICROSYSTEMS, INC. company facts
ALLEGRO MICROSYSTEMS, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 01749D105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
ALGM
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Invesco Ltd. | 7.3% | $773,649,908 | 13,678,393 | Invesco Ltd. | 30 Jun 2026 | |||
| Capital Research Global Investors | 7.1% | -17% | $410,252,327 | -$87,395,004 | 13,111,292 | -18% | Capital Research Global Investors | 31 Dec 2025 |
| BlackRock, Inc. | 6.9% | $892,113,465 | 12,814,040 | BlackRock, Inc. | 30 Jun 2026 | |||
| JPMORGAN CHASE & CO | 6.8% | +40% | $886,228,456 | +$259,984,105 | 12,729,473 | +42% | JPMORGAN CHASE & CO | 30 Jun 2026 |
| FMR LLC | 5.3% | -60% | $360,331,697 | -$569,512,861 | 9,913,112 | -61% | FMR LLC | 30 Sep 2026 |
As of 30 Jun 2026,
375
institutional investors reported holding
shares of
ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM).
This represents
79%
of the company’s total
outstanding shares.
147.02M
Full value: 147,020,352 · shares · 30 Jun 2026187.04M
Full value: 187,039,843 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
67%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 14% | 25,581,021 | -6.7% | 0.08% | $1,780,950,716 |
| BlackRock, Inc. | 7.4% | 13,889,324 | +11% | 0.01% | $966,974,743 |
| Invesco Ltd. | 7.3% | 13,678,393 | +56% | 0.08% | $952,289,720 |
| JPMORGAN CHASE & CO | 6.8% | 12,723,790 | +47% | 0.05% | $844,865,142 |
| Capital Research Global Investors | 6.4% | 12,006,396 | -3.5% | 0.12% | $835,885,290 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.1% | 7,668,472 | -3.2% | 0.02% | $533,879,021 |
| STATE STREET CORP | 3% | 5,676,421 | +8.6% | 0.01% | $395,192,430 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.9% | 5,508,806 | +0.81% | 0.01% | $383,523,074 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2% | 3,710,288 | +3160% | 0.03% | $258,311,000 |
| Clearbridge Investments, LLC | 1.6% | 2,946,239 | +2.9% | 0.17% | $205,117,173 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4% | 2,644,929 | +7.7% | 0.01% | $184,178,667 |
| DIMENSIONAL FUND ADVISORS LP | 1.1% | 2,123,963 | -2.1% | 0.03% | $147,846,925 |
| MORGAN STANLEY | 0.97% | 1,809,335 | -20% | 0.01% | $125,966,099 |
| LOOMIS SAYLES & CO L P | 0.87% | 1,619,931 | -3.2% | 0.14% | $112,779,596 |
| GOLDMAN SACHS GROUP INC | 0.84% | 1,575,057 | +9.6% | 0.01% | $109,655,469 |
| PRINCIPAL FINANCIAL GROUP INC | 0.8% | 1,489,791 | -17% | 0.05% | $103,719,251 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 0.77% | 1,443,495 | +1983% | 0.03% | $100,487,390 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.73% | 1,360,525 | -2.2% | 0.01% | $94,719,751 |
| NORGES BANK | 0.69% | 1,294,958 | 0.01% | $90,154,976 | |
| NORTHERN TRUST CORP | 0.62% | 1,167,135 | +12% | 0.01% | $81,255,938 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 0.62% | 1,159,503 | -44% | 0.12% | $80,725,000 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 0.6% | 1,121,950 | -23% | 0.11% | $78,110,159 |
| VOYA INVESTMENT MANAGEMENT LLC | 0.52% | 966,871 | -34% | 0.06% | $67,313,558 |
| RAYMOND JAMES FINANCIAL INC | 0.5% | 928,060 | -6.8% | 0.02% | $64,611,536 |
| BANK OF AMERICA CORP /DE/ | 0.49% | 921,728 | +7.7% | 0% | $64,170,703 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
24
Headline period
Q2 2026
Rows shown
1-24 of 24
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 1,072,546 | $38,985,392 | -$6,088,008 | $36.35 | 64 |
| 2026 Q2 | 147,020,352 | $10,189,070,650 | +$780,428,866 | $69.62 | 375 |
| 2026 Q1 | 138,349,033 | $4,323,319,972 | +$80,356,571 | $31.53 | 320 |
| 2025 Q4 | 136,544,024 | $3,603,604,368 | -$37,898,347 | $26.38 | 294 |
| 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 |