Companies / Allegro Microsystems Inc
Allegro Microsystems Inc
Nasdaq: ALGMCIK 866291MANCHESTER, NH
Financials · FY2026
Ownership
186.4M shares outstanding · as of Jul 27, 2026
Ownership
| Insiders | 0.22% | 413,248 |
| 10%+ / strategic | 12.68% | 23,635,746 |
| Institutions | 61.08% | 113,845,035 |
| Public float | 26.02% | 48,508,017 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 5
View all →| Insider | % of shares | Shares |
|---|---|---|
D'Antilio DerekEVP, CFO & Treasurer | 0.12% | 216,776 |
Briansky SharonSVP, GC and Secretary | 0.05% | 84,180 |
Madormo RichardSVP, Worldwide Sales | 0.03% | 60,311 |
Hagen ErinSVP, CHRO | 0.02% | 30,094 |
Kent IanSVP, Global Operations | 0.01% | 21,887 |
Institutional holders 308
View all →| Holder | Value | % of shares |
|---|---|---|
| $966.97M | 7.45% | |
| $623.51M | 12.68% | |
| $395.19M | 3.05% | |
| $374.66M | 7.62% | |
| $345.88M | 7.03% | |
| $201.83M | 4.10% | |
| $193.83M | 3.94% | |
| $90.29M | 1.54% | |
| $77.48M | 1.32% | |
| $67.55M | 1.37% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $117.51M | +1.7M +13.83% | 13,889,324 7.45% of shares | high |
| Q1 2026 as of | Adage Capital Partners Gp, L.L.C. 13F manager | Trim | Common stock | $-42.23M | -1.3M -47.76% | 1,464,737 0.79% of shares | medium |
| Q1 2026 as of | Millennium Management LLC 13F manager | Trim | Common stock | $-41.42M | -1.3M -97.90% | 28,127 0.02% of shares | medium |
| Q1 2026 as of | Norges Bank 13F manager | Exit | Common stock | $-38.46M | -1.5M -100.00% | 0 | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common stock | $22.06M | +317K +5.91% | 5,676,421 3.05% of shares | medium |
| Q1 2026 as of | Balyasny Asset Management L.P. 13F manager | Trim | Common stock | $-17.80M | -565K -69.66% | 245,910 0.13% of shares | medium |
| Q1 2026 as of | Voya Investment Management LLC 13F manager | Add | Common stock | $16.36M | +519K +55.18% | 1,459,271 0.78% of shares | medium |
| Q1 2026 as of | AllianceBernstein L.P. 13F manager | Add | Common stock | $15.16M | +575K +50.03% | 1,723,370 0.92% of shares | medium |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Capital Research Global Investors | Passive13G/A | — |
| Fmr LLC | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| ALGM | — | 01749D105 |