Allegro Microsystems, Inc.
ALGM- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0000866291
In the last 90 days, Allegro Microsystems, Inc. insiders filed 0 open-market purchases and 1 sale; 376 institutions reported holding it in 13F filings for Q2 2026, worth $10.2B in total; Maverick Capital is the only superinvestor holding it.
Key figures
- Market capClose on Nov 10, 2026
- $5.73B
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $45.3K in total
- 1
- 13F holdersQ2 2026, +58 vs. previous quarter
- 376
- 13F valueReported value at the end of Q2 2026
- $10.2B
- Superinvestors holdingAt the end of Q2 2026
- 1
Price chart
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2026
- $890.1M
- +22.8% year over year
- Net income, FY2026
- -$14.9M
- No comparable prior period
- Free cash flow, FY2026
- $124.9M
- +468.8% year over year
- Revenue, Q2 FY2027
- $276.9M
- +29.2% year over year
Revenue flow, FY2026
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Net loss for FY2026: $14.9M (1.7% of revenue).
Short interest
See short dataFrom FINRA, settlement date Oct 30, 2026.
- Short interest
- 10.6M
- Shares sold short
- Change
- +183.9K
- +1.8% vs. previous
- Days to cover
- 2.75
- At average daily volume
Superinvestors holding ALGM, Q2 2026
Go to the superinvestors tab1 superinvestor reports holding Allegro Microsystems, Inc. on Form 13F. Percentages are the stock's share of each portfolio.
Maverick Capital
Lee Ainslie
<0.1%
Allegro Microsystems, Inc.'s share of the portfolio
- Shares
- 10,094
- Value
- $702.7K
Latest insider trades
See all insider tradesOpen-market purchases and sales by Allegro Microsystems, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 18, 2026 (view filing)4:15 PM ET | Aug 17 | 1 day | Raubacher JennieDirector | SSale | −1.00K | $45.32 | −$45.3K | −6.7%14.0K after | |
| Aug 12, 2026 (view filing)4:16 PM ET | Aug 10 | 2 days | Hagen ErinSVP, CHRO | SSale | −2.29K | $44.39 | −$101.4K | −6.9%31.1K after | |
| Jun 4, 2026 (view filing) | Jun 3 | 1 day | Madormo RichardSVP, Worldwide Sales | SSale | −5.00K | $52.72 | −$263.6K | −6.7%69.7K after | |
| May 26, 2026 (view filing) | May 22 | 4 days | Coleman TroySVP, General Manager, Products | SSale | −4.50K | $45.72 | −$205.7K | −5.5%77.5K after | |
| May 22, 2026 (view filing) | May 21 | 1 day | Webster Roald GrahamVP, Chief Accounting Officer | SSale | −5.22K | $44.89 | −$234.2K | −28.5%13.1K after | |
| May 19, 2026 (view filing) | May 18 | 1 day | Kent IanSVP, Global Operations | SSale | −2.64K | $41.56 | −$109.8K | −9.4%25.4K after | |
| May 15, 2026 (view filing) | May 14 | 1 day | Lynch Susan DDirector | SSale | −16.7K | $45.46 | −$759.7K | −56.6%12.8K after | |
| May 13, 2026 (view filing) | May 11 | 2 days | Briansky SharonSVP, GC and Secretary | SSale | −8.95K | $47.54 | −$425.4K | −10.6%75.2K after | |
| May 13, 2026 (view filing) | May 11 | 2 days | Doogue MichaelPresident and CEO | SSale | −30.1K | $47.23 | −$1.42M | −10.6%252.8K after | |
| Mar 3, 2026 (view filing) | Mar 2 | 1 day | Briansky SharonSVP, GC and Secretary | SSale | −9.73K | $35.00 | −$340.4K | −10.4%84.2K after |
Top 10 13F holders, Q2 2026
See all 376 holdersThe largest institutional positions in Allegro Microsystems, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 25,581,021 | $1.78B | 0.08% | −1,840,185−6.7% | Reduced |
| BlackRock, Inc. | 13,889,324 | $967.0M | 0.01% | +1,394,456+11.2% | Added |
| Invesco Ltd. | 13,678,393 | $952.3M | 0.08% | +4,926,912+56.3% | Added |
| JPMorgan Chase & Co | 12,723,790 | $844.9M | 0.05% | +4,071,722+47.1% | Added |
| Capital Research Global Investors | 12,006,396 | $835.9M | 0.12% | −429,162−3.5% | Reduced |
| Vanguard Portfolio Management LLC | 7,668,472 | $533.9M | 0.02% | −251,570−3.2% | Reduced |
| State Street Corp | 5,676,421 | $395.2M | 0.01% | +448,317+8.6% | Added |
| Vanguard Capital Management LLC | 5,508,806 | $383.5M | 0.01% | +44,088+0.8% | Added |
| Price T Rowe Associates Inc | 3,710,288 | $258.3M | 0.03% | +3,596,489+3,160.4% | Added |
| Clearbridge Investments, LLC | 2,946,239 | $205.1M | 0.17% | +82,529+2.9% | Added |
Holders of 5% or more of ALGM
See all 4 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of Allegro Microsystems, Inc..
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Invesco Ltd. | 13G | 7.30%13.7M shares | New | Aug 13, 20261 filing | Aug 13, 2026 | SEC |
| Capital Research Global Investors | 13G/A | 7.10%13.1M shares | −1.50 ppfrom 8.60% | May 13, 20253 filings | Feb 12, 2026 | SEC |
| BlackRock, Inc. | 13G/A | 6.90%12.8M shares | – | Oct 24, 20243 filings | Jul 27, 2026 | SEC |
| FMR LLC | 13G/A | 5.30%9.91M shares | −8.40 ppfrom 13.70% | Feb 9, 20249 filings | Oct 7, 2026 | SEC |
Politician trades
All politician trades in ALGM4 members of Congress reported 11 trades in Allegro Microsystems, Inc. since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Oct 12, 2026 |  Gilbert Ray Cisneros, Jr. House · CA | Buy | $1K-$15K |
| Nov 6, 2024 |  Josh Gottheimer House · NJ | Buy | $1K-$15K |
| Oct 3, 2024 | Josh Gottheimer House · NJ | Sell | $1K-$15K |
| Feb 15, 2024 | Josh Gottheimer House · NJ | Buy | $1K-$15K |
| Jan 7, 2024 | Josh Gottheimer House · NJ | Sell (partial) | $1K-$15K |
House · CA · Oct 12, 2026
Buy$1K-$15K
House · NJ · Nov 6, 2024
Buy$1K-$15K
House · NJ · Oct 3, 2024
Sell$1K-$15K
House · NJ · Feb 15, 2024
Buy$1K-$15K
House · NJ · Jan 7, 2024
Sell (partial)$1K-$15K