Allegro Microsystems (ALGM): which funds own it
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Sections with a free account
2 concentrated managers hold it with a median weight of 3.7%.
Who owns Allegro Microsystems?
Holders reporting more than 5% of the shares to the SEC (Schedules 13D/13G): Invesco, 7.3% (13G filed Aug 13, 2026), Capital Research Global Investors, 7.1% (13G/A filed Feb 12, 2026), BlackRock, 6.9% (13G/A filed Jul 27, 2026), JPMorgan Chase, 6.8% (13G filed Jul 16, 2026) and FMR, 5.3% (13G/A filed Oct 7, 2026). As of Jun 30, 2026, the largest holders reported on Form 13F were FMR (13.7% of the shares), BlackRock (7.5%) and Invesco (7.3%).
Which institutions hold the most Allegro Microsystems shares?
Per Form 13F filings as of Jun 30, 2026, as a share of all shares outstanding:
- 1. FMR: 13.7%
- 2. BlackRock: 7.5%
- 3. Invesco: 7.3%
- 4. JPMorgan Chase: 6.8%
- 5. Capital Research Global Investors: 6.4%
- 6. Vanguard Portfolio Management: 4.1%
- 7. State Street: 3.0%
- 8. Vanguard Capital Management: 3.0%
- 9. Price T Rowe Associates: 2.0%
- 10. Clearbridge Investments: 1.6%
How much of Allegro Microsystems do institutions own?
The 376 institutions that file 13F reported 79.6% of the shares as of Jun 30, 2026 (not counting 2 positions with implausible figures).
Sources:13G by Invesco (Aug 13, 2026) ↗13G/A by Capital Research Global Investors (Feb 12, 2026) ↗13G/A by BlackRock (Jul 27, 2026) ↗13G by JPMorgan Chase (Jul 16, 2026) ↗13G/A by FMR (Oct 7, 2026) ↗All of the company's proxy statements on EDGAR ↗
13F percentages divide the shares each institution reports by the shares outstanding on the cover of the company's latest report before the quarter end (May 18, 2026). Entities of the same group file separately and are not added up. We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.
Allegro Microsystems revenue
Allegro Microsystems reported annual revenue of $890.1 million for fiscal year 2026 (year ended March 27, 2026), according to its Form 10-K filed with the SEC (XBRL data).
Quarter flow (concentrated managers)
Change in managers (2 → 2): 0 opened · 0 exited = 0
Net flow in the quarter: −$27.8M (−400 K shares) · bought $0 and sold $27.8MShares concentrated managers added minus those they cut, valued at the 13F quarter-end implied price, not each trade's price. It is a different measure from the change in managers: the two can have opposite signs.
Concentrated managers holding it
- S Squared TechnologyReduced$23.1M7.2%−2.7 pp
- Sirios Capital ManagementReduced$1.6M0.2%−1.1 pp
Up to 15, sorted by position value. The percentage is the weight in each manager's portfolio.
Largest holders of ALGM (all 13F filers)
- FMR25.6 MInvestment firm · 13.72% of the company−1.8 M
- BlackRock13.9 MIndex manager · 7.45% of the company+1.4 M
- Invesco13.7 MInvestment firm · 7.33% of the company+4.9 M
- JPMorgan Chase12.7 MBank or trading desk · 6.82% of the company+4.1 M
- Capital Research Global Investors12.0 MInvestment firm · 6.44% of the company−429 K
- Vanguard Portfolio Management7.7 MIndex manager · 4.11% of the company−252 K
- State Street5.7 MIndex manager · 3.04% of the company+448 K
- Vanguard Capital Management5.5 MIndex manager · 2.95% of the company+44 K
- Price T Rowe Associates3.7 MInvestment firm · 1.99% of the company+3.6 M
- Clearbridge Investments2.9 MInvestment firm · 1.58% of the company+83 K
- Shares
- 25.6 M
- Change
- −1.8 M
- % of the company
- 13.72%
See more
- Type
- Investment firm
- Value
- $1.8 bn
- Shares
- 13.9 M
- Change
- +1.4 M
- % of the company
- 7.45%
See more
- Type
- Index manager
- Value
- $967M
- Shares
- 13.7 M
- Change
- +4.9 M
- % of the company
- 7.33%
See more
- Type
- Investment firm
- Value
- $952M
- Shares
- 12.7 M
- Change
- +4.1 M
- % of the company
- 6.82%
See more
- Type
- Bank or trading desk
- Value
- $845M
- Shares
- 12.0 M
- Change
- −429 K
- % of the company
- 6.44%
See more
- Type
- Investment firm
- Value
- $836M
- Shares
- 7.7 M
- Change
- −252 K
- % of the company
- 4.11%
See more
- Type
- Index manager
- Value
- $534M
- Shares
- 5.7 M
- Change
- +448 K
- % of the company
- 3.04%
See more
- Type
- Index manager
- Value
- $395M
- Shares
- 5.5 M
- Change
- +44 K
- % of the company
- 2.95%
See more
- Type
- Index manager
- Value
- $384M
- Shares
- 3.7 M
- Change
- +3.6 M
- % of the company
- 1.99%
See more
- Type
- Investment firm
- Value
- $258M
- Shares
- 2.9 M
- Change
- +83 K
- % of the company
- 1.58%
See more
- Type
- Investment firm
- Value
- $205M
The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.
Held by institutions (13F)
Institutions (13F): 79.6% of the shares · top 10: 55.5% · in index firms: 28.1% of the institutional total
Q2 2026: 79.6%
Shares reported by the 376 13F filers as of Jun 30, 2026 (not counting 2 positions with implausible figures), divided by the shares outstanding on the cover of the company's latest report (May 18, 2026). It is not all institutional ownership: only managers above $100M file a 13F, and it excludes short positions. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. We only publish it where the figure is credible: not for ADRs, companies with more than one share class or stale shares-outstanding data.
Fundamentals
12-month figures to Sep 25, 2026 · balance sheet as of Sep 25, 2026.
- Operating margin
- 7.5%
- Net margin
- 3.1%
- ROE
- 3.1%
- Revenue (TTM)
- $1.0 bn
- Revenue growth
- 27.9%
- Net income (TTM)
- $30.9M
- Net debt / EBITDA
- 0.7x
- Free cash flow (TTM)
- $104M
- Quality vs sector
- —
This company's sector comes from its SIC code, unreviewed, or has too few comparable companies: we do not compare it with its sector.
Figures from the statements the company filed with the SEC (10-K, 10-Q). Free cash flow = operating cash flow − capital expenditures; empty if the company does not report capex. “Quality vs sector”: 0 to 100, the average of its percentiles in ROE, operating margin, free-cash-flow margin, revenue and earnings growth and net debt / EBITDA (at least 3 needed) against companies in its sector above $300M. How each figure is calculated
Shares outstanding: buybacks and dilution
2026: 185.0 M
- 1 year
- −1.4%
- 3 years
- −4.5%
- 5 years
- +4.9%
- Buybacks (FY 2026)
- $0
- Share issuance
- $0
- Stock-based compensation
- $47.9M5.4% of revenue
- Dividends paid
- no data
From the statements the company filed with the SEC (10-K). The change compares average diluted shares of each fiscal year, on today's basis: negative = it bought back more than it issued; positive = dilution. “No data” = the company does not report that item under a tag we can read; it does not mean zero.
Earnings quality and debt
- Operating cash flow ÷ net income (12 months)
- 4.52
- Interest coverage (operating income ÷ interest)
- 0.8 timesfiscal 2026
- Debt due within 12 months
- $1.5M0.01 times cash and investments
From the figures the company filed with the SEC. Cash flow over net income near or above 1 means earnings are collected in cash; far below, that part is accounting. Coverage says how many times operating income pays the latest fiscal year's interest. Maturities come from the debt note of the latest annual report, counted from its closing date. “No data” never means zero.
Insiders (Form 4)
10% owners who bought (6 m): 0
Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.
Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →
Above 5% (13D/13G)
Disclosed stakes, with their amendments. A filing is not always a purchase: there are also reductions and changes of filing entity.
This list may be incomplete: we hold 13D and 13G filings made since Dec 23, 2024. A holder above 5% that has not filed anything since then is not shown here.
Above 5% over time (13D/13G)
Each holder with its filings in order. History since December 2024.
Flagged material events (8-K)
Change in directors or officers (Item 5.02)
«Allegro MicroSystems Appoints Brian White to its Board of Directors»
Change in directors or officers (Item 5.02)
«Allegro MicroSystems Appoints Robert Willett to its Board of Directors»
Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.
All material events (8-K)
Earnings, agreements, financing, management changes and announcements from the last year, with a filter by type and a link to each filing.
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