Allegro MicroSystems, Inc. (ALGM)
Nasdaq: ALGM · Semiconductors & Related Devices · Manchester, NH · filing with the SEC since 2007
Grade5.1
◀ Past 5.7● Present 5.0▶ Future 4.8
Who owns Allegro MicroSystems, Inc.
As filed with the SECHolders of 5% or more
5
Invesco LTD holds 7.3% of Common Stock, as its SCHEDULE 13G filed Aug 13, 2026 says.
Directors and officers
17
report now, of 34 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Invesco LTD
SCHEDULE 13G · filed Aug 13, 2026 · Common Stock
Capital Research Global Investors
SCHEDULE 13G/A · filed Feb 12, 2026 · Common Stock · 8.6% in Aug 13, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 27, 2026 · Common Stock
JPMorgan Chase & Co.
SCHEDULE 13G · filed Jul 16, 2026 · Common Stock, par value $0.01 per share · 4.8% in Apr 15, 2025
Fmr LLC
SCHEDULE 13G/A · filed Oct 7, 2026 · COMMON STOCK · 13.7% in Aug 6, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
What ALGM reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Polar Semiconductor, LLC
An entity · legal entity · owns, named in the 10-K filed May 21, 2026
Crocus
A company bought · acquisition · Aug 2023 · owns, named in the 10-K filed May 21, 2026
Voxtel, Inc.
A company bought · acquisition · owns, named in the 10-K filed May 21, 2026
16 subsidiaries in 11 countries, from the list filed with the 10-K filed May 21, 2026.
Insider tradesForm 4
13sales
0purchases
0sales on a scheduled plan
9people selling
$5.2Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 1, 2025 to Oct 1, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 1, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window9 of 39 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Briansky Sharon | SVP, GC and Secretary | 4 | $2.0M | 0 | 0 | $0 |
| Doogue Michael | President and CEO | 1 | $1.4M | 0 | 0 | $0 |
| Lynch Susan D | director | 1 | $800,000 | 0 | 0 | $0 |
| Madormo Richard | SVP, Worldwide Sales | 1 | $300,000 | 0 | 0 | $0 |
| Webster Roald Graham | VP, Chief Accounting Officer | 1 | $200,000 | 0 | 0 | $0 |
| Hagen Erin | SVP, CHRO | 2 | $200,000 | 0 | 0 | $0 |
| Coleman Troy | SVP, General Manager, Products | 1 | $200,000 | 0 | 0 | $0 |
| Kent Ian | SVP, Global Operations | 1 | $100,000 | 0 | 0 | $0 |
| Raubacher Jennie | director | 1 | $0 | 0 | 0 | $0 |