ALGMNasdaqSemiconductors & Related DevicesFiscal year ends March 31
ALLEGRO MICROSYSTEMS, INC.
Financials through Q1 FY2027, quarter ended Jun 26, 2026Last filing: 10-Q on Jul 31, 2026
$33.17+1.55 (+4.90%)
Close on Oct 19, 2026
- Market cap
- $6.23B
- P/E (TTM)
- 552.8
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
79.5%
148M of 186M shares
Institutional holders
374
101 new, 43 sold out
Net institutional buying
10M
In Q2 2026
Insider trades, 12 months
0 buys · 13 sales
Net sold $5.22M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Abigail P. Johnson | 9,913,112 | 5.30% | 13G (passive) amendment | Sep 30, 2026 |
| Sanken Electric Co., Ltd. | 59,732,782 | 30.80% | 13G (passive) amendment | Jul 23, 2024 |
| FMR LLC | 25,581,021 | 13.70% | 13G (passive) amendment | Jun 30, 2026 |
| Invesco Ltd. | 13,678,393 | 7.30% | 13G (passive) | Jun 30, 2026 |
| Capital Research Global Investors | 13,111,292 | 7.10% | 13G (passive) amendment | Dec 31, 2025 |
| BlackRock, Inc. | 12,814,040 | 6.90% | 13G (passive) amendment | Jun 30, 2026 |
| JPMorgan Chase & Co | 12,729,473 | 6.80% | 13G (passive) | Jun 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of ALGM | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| FMR LLC | 25,581,021 | 13.72% | $1.78B | −1,840,185 | 0.08% |
| BlackRock, Inc. | 13,889,324 | 7.45% | $966.97M | +1,394,456 | 0.01% |
| Invesco Ltd. | 13,678,393 | 7.34% | $952.29M | +4,926,912 | 0.08% |
| JPMorgan Chase & Co | 12,723,790 | 6.83% | $844.87M | +4,071,722 | 0.05% |
| Capital Research Global Investors | 12,006,396 | 6.44% | $835.89M | −429,162 | 0.12% |
| Vanguard Portfolio Management LLC | 7,668,472 | 4.11% | $533.88M | −251,570 | 0.02% |
| State Street Corp | 5,676,421 | 3.05% | $395.19M | +448,317 | 0.01% |
| Vanguard Capital Management LLC | 5,508,806 | 2.96% | $383.52M | +44,088 | 0.01% |
| Price T Rowe Associates Inc /Md/ | 3,710,288 | 1.99% | $258.31K | +3,596,489 | 0.03% |
| Clearbridge Investments, LLC | 2,946,239 | 1.58% | $205.12M | +82,529 | 0.17% |
| Geode Capital Management, LLC | 2,644,929 | 1.42% | $184.18M | +188,109 | 0.01% |
| Dimensional Fund Advisors LP | 2,123,963 | 1.14% | $147.85M | −46,524 | 0.03% |
| Morgan Stanley | 1,809,335 | 0.97% | $125.97M | −465,950 | 0.01% |
| Loomis Sayles & Co L P | 1,619,931 | 0.87% | $112.78M | −54,177 | 0.14% |
| Goldman Sachs Group Inc | 1,575,057 | 0.84% | $109.66M | +137,842 | 0.01% |
| Principal Financial Group Inc | 1,489,791 | 0.80% | $103.72M | −300,675 | 0.05% |
| Massachusetts Financial Services Co /Ma/ | 1,443,495 | 0.77% | $100.49M | +1,374,198 | 0.03% |
| Charles Schwab Investment Management Inc | 1,360,525 | 0.73% | $94.72M | −30,081 | 0.01% |
| Norges Bank | 1,294,958 | 0.69% | $90.15M | New | 0.01% |
| Alliancebernstein L.P. | 1,201,203 | 0.64% | $37.87M | −522,167 | 0.01% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 374 | 148M | 79.5% | 101 / 117 | 107 / 43 | 23M | 13M |
| Q1 2026 | 322 | 138M | 74.2% | 69 / 126 | 86 / 37 | 31M | 15M |
| Q4 2025 | 294 | 137M | 73.4% | 56 / 79 | 122 / 51 | 18M | 24M |
| Q3 2025 | 296 | 144M | 77.1% | 67 / 79 | 107 / 42 | 14M | 18M |
| Q2 2025 | 273 | 147M | 78.8% | 53 / 94 | 104 / 68 | 14M | 24M |
| Q1 2025 | 291 | 158M | 84.9% | 70 / 105 | 81 / 33 | 37M | 21M |
| Q4 2024 | 256 | 142M | 76.2% | 51 / 79 | 107 / 41 | 19M | 30M |
| Q3 2024 | 248 | 154M | 82.5% | 43 / 115 | 69 / 60 | 58M | 14M |
| Q2 2024 | 268 | 116M | 62.4% | 40 / 111 | 84 / 45 | 23M | 23M |
| Q1 2024 | 277 | 117M | 62.6% | 43 / 105 | 93 / 52 | 31M | 17M |
| Q4 2023 | 288 | 102M | 54.7% | 57 / 108 | 96 / 75 | 19M | 16M |
| Q3 2023 | 311 | 99M | 53.2% | 42 / 140 | 96 / 79 | 10M | 10M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of ALGM | Value | % of fund | As of |
|---|---|---|---|---|---|
| Select Semiconductors Portfolio | 16,739,387 | 8.98% | $801.31M | 1.56% | May 31, 2026 |
| Capital World Growth & Income Fund | 5,926,903 | 3.18% | $283.72M | 0.18% | May 31, 2026 |
| SMALLCAP World Fund Inc | 5,503,804 | 2.95% | $383.17M | 0.41% | Jun 30, 2026 |
| Invesco Small Cap Value Fund | 4,439,786 | 2.38% | $184.25M | 1.66% | Jul 31, 2026 |
| iShares Core S&P Mid-Cap ETF | 4,248,752 | 2.28% | $295.80M | 0.24% | Jun 30, 2026 |
| Vanguard Total Stock Market Index Fund | 3,841,201 | 2.06% | $267.42M | 0.01% | Jun 30, 2026 |
| Vanguard Information Technology Index Fund | 3,119,629 | 1.67% | $149.34M | 0.09% | May 31, 2026 |
| Vanguard Small-Cap Index Fund | 2,777,063 | 1.49% | $193.34M | 0.10% | Jun 30, 2026 |
| Fidelity Advisor Semiconductors Fund | 2,424,390 | 1.30% | $100.61M | 1.40% | Jul 31, 2026 |
| Invesco Discovery Fund | 2,111,037 | 1.13% | $101.06M | 1.29% | May 31, 2026 |
| JPMorgan Growth Advantage Fund | 1,957,811 | 1.05% | $136.30M | 0.61% | Jun 30, 2026 |
| T. Rowe Price New Horizons Fund, Inc. | 1,646,100 | 0.88% | $114.60M | 0.78% | Jun 30, 2026 |
| State Street(R) SPDR(R) S&P(R) Semiconductor ETF | 1,645,105 | 0.88% | $114.53M | 3.29% | Jun 30, 2026 |
| JPMorgan Mid Cap Growth Fund | 1,623,917 | 0.87% | $113.06M | 0.85% | Jun 30, 2026 |
| Vanguard Small-Cap Growth Index Fund | 1,601,262 | 0.86% | $111.48M | 0.24% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Michael Doogue | President and CEO, Director | 531,873 | 0.29% | May 19, 2026 |
| Vineet A. Nargolwala | President and CEO, Director | 355,913 | 0.19% | Nov 6, 2024 |
| Erin Hagen | SVP, CHRO | 31,052 | 0.02% | Aug 12, 2026 |
| Richard Madormo | SVP, Worldwide Sales | 69,687 | 0.04% | Jun 4, 2026 |
| Troy Coleman | SVP, General Manager, Products | 77,476 | 0.04% | May 26, 2026 |
| Roald Graham Webster | VP, Chief Accounting Officer | 13,106 | 0.01% | May 22, 2026 |
| Ian Kent | SVP, Global Operations | 25,392 | 0.01% | May 19, 2026 |
| Sharon Briansky | SVP, GC and Secretary | 79,753 | 0.04% | May 19, 2026 |
| Derek D'Antilio | EVP, CFO & Treasurer | 238,813 | 0.13% | May 19, 2026 |
| Max R. Glover | SVP of Worldwide Sales | 266,339 | 0.14% | Nov 19, 2024 |
| Jennie Raubacher | Director | 13,976 | 0.01% | Aug 18, 2026 |
| Yoshihiro Suzuki | Director | 217,811 | 0.12% | Aug 7, 2026 |
| Mary G. Puma | Director | 21,734 | 0.01% | Aug 7, 2026 |
| Robert Willett | Director | 1,094 | 0.00% | Aug 7, 2026 |
| Krishna G. Palepu | Director | 14,762 | 0.01% | Aug 7, 2026 |
| Brian C. White | Director | 594 | 0.00% | Aug 7, 2026 |
| Joseph R. Martin | Director | 39,430 | 0.02% | Aug 7, 2026 |
| Susan D. Lynch | Director | 12,805 | 0.01% | May 15, 2026 |
| Richard R. Lury | Director | 18,857 | 0.01% | Aug 13, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Jennie Raubacher Director | Aug 17, 2026 | Sale(10b5-1 plan) | −1,000 | $45.32 | $45.32K | 13,976 |
| Erin Hagen SVP, CHRO | Aug 10, 2026 | Sale(10b5-1 plan) | −2,285 | $44.39 | $101.43K | 31,052 |
| Krishna G. Palepu Director | Aug 5, 2026 | Award | +4,251 | – | – | 14,212 |
| Yoshihiro Suzuki Director | Aug 5, 2026 | Award | +4,251 | – | – | 217,811 |
| Mary G. Puma Director | Aug 5, 2026 | Award | +4,251 | – | – | 21,734 |
| Joseph R. Martin Director | Aug 5, 2026 | Award | +4,251 | – | – | 39,430 |
| Brian C. White Director | Jun 17, 2026 | Award | +594 | – | – | 594 |
| Richard Madormo SVP, Worldwide Sales | Jun 3, 2026 | Sale | −5,000 | $52.72 | $263.60K | 69,687 |
| Troy Coleman SVP, General Manager, Products | May 22, 2026 | Sale | −4,500 | $45.72 | $205.74K | 77,476 |
| Roald Graham Webster VP, Chief Accounting Officer | May 21, 2026 | Sale | −5,217 | $44.89 | $234.19K | 13,106 |
| Ian Kent SVP, Global Operations | May 18, 2026 | Sale | −2,642 | $41.56 | $109.80K | 25,392 |
| Derek D'Antilio EVP, CFO & Treasurer | May 16, 2026 | Tax withholding | −37,840 | $43.10 | $1.63M | 238,813 |
| Michael Doogue President and CEO, Director | May 16, 2026 | Tax withholding | −60,508 | $43.10 | $2.61M | 279,076 |
| Sharon Briansky SVP, GC and Secretary | May 16, 2026 | Tax withholding | −13,942 | $43.10 | $600.90K | 79,753 |
| Roald Graham Webster VP, Chief Accounting Officer | May 16, 2026 | Tax withholding | −4,277 | $43.10 | $184.34K | 18,323 |
| Erin Hagen SVP, CHRO | May 16, 2026 | Tax withholding | −5,815 | $43.10 | $250.63K | 33,337 |
| Richard Madormo SVP, Worldwide Sales | May 16, 2026 | Tax withholding | −5,439 | $43.10 | $234.42K | 74,687 |
| Troy Coleman SVP, General Manager, Products | May 16, 2026 | Tax withholding | −9,670 | $43.10 | $416.78K | 81,976 |
| Ian Kent SVP, Global Operations | May 16, 2026 | Tax withholding | −2,345 | $43.10 | $101.07K | 28,034 |
| Susan D. Lynch Director | May 14, 2026 | Sale | −16,711 | $45.46 | $759.68K | 12,805 |
| Sharon Briansky SVP, GC and Secretary | May 13, 2026 | Award | +15,852 | – | – | 91,084 |
| Sharon Briansky SVP, GC and Secretary | May 13, 2026 | Award | +2,611 | – | – | 93,695 |
| Derek D'Antilio EVP, CFO & Treasurer | May 13, 2026 | Award | +29,439 | – | – | 246,215 |
| Derek D'Antilio EVP, CFO & Treasurer | May 13, 2026 | Award | +30,438 | – | – | 276,653 |
| Robert Willett Director | May 13, 2026 | Award | +1,094 | – | – | 1,094 |
| Erin Hagen SVP, CHRO | May 13, 2026 | Award | +9,058 | – | – | 39,152 |
| Troy Coleman SVP, General Manager, Products | May 13, 2026 | Award | +18,116 | – | – | 91,646 |
| Roald Graham Webster VP, Chief Accounting Officer | May 13, 2026 | Award | +4,756 | – | – | 22,056 |
| Roald Graham Webster VP, Chief Accounting Officer | May 13, 2026 | Award | +544 | – | – | 22,600 |
| Richard Madormo SVP, Worldwide Sales | May 13, 2026 | Award | +19,815 | – | – | 80,126 |
| Ian Kent SVP, Global Operations | May 13, 2026 | Award | +8,492 | – | – | 30,379 |
| Michael Doogue President and CEO, Director | May 13, 2026 | Award | +77,135 | – | – | 255,884 |
| Michael Doogue President and CEO, Director | May 13, 2026 | Award | +83,700 | – | – | 339,584 |
| Sharon Briansky SVP, GC and Secretary | May 11, 2026 | Sale | −8,948 | $47.54 | $425.39K | 75,232 |
| Michael Doogue President and CEO, Director | May 11, 2026 | Sale | −30,089 | $47.23 | $1.42M | 252,797 |
| Richard Madormo SVP, Worldwide Sales | Mar 24, 2026 | Returned to company | −6,498 | $32.58 | $211.70K | 60,311 |
| Sharon Briansky SVP, GC and Secretary | Mar 2, 2026 | Sale(10b5-1 plan) | −9,727 | $35.00 | $340.45K | 84,180 |
| Erin Hagen SVP, CHRO | Mar 2, 2026 | Sale | −2,598 | $35.00 | $90.93K | 30,094 |
| Derek D'Antilio EVP, CFO & Treasurer | Feb 27, 2026 | Tax withholding | −9,995 | $36.47 | $364.52K | 216,776 |
| Sharon Briansky SVP, GC and Secretary | Feb 27, 2026 | Tax withholding | −9,107 | $36.47 | $332.13K | 93,907 |
| Erin Hagen SVP, CHRO | Feb 27, 2026 | Tax withholding | −1,996 | $36.47 | $72.79K | 32,692 |
| Sharon Briansky SVP, GC and Secretary | Feb 17, 2026 | Sale(10b5-1 plan) | −9,258 | $41.56 | $384.76K | 103,014 |
| Sharon Briansky SVP, GC and Secretary | Feb 13, 2026 | Tax withholding | −8,991 | $42.38 | $381.04K | 112,272 |
| Derek D'Antilio EVP, CFO & Treasurer | Feb 13, 2026 | Tax withholding | −17,808 | $42.38 | $754.70K | 226,771 |
| Ian Kent SVP, Global Operations | Feb 2, 2026 | Award | +9,183 | – | – | 21,887 |
| Sharon Briansky SVP, GC and Secretary | Dec 10, 2025 | Sale(10b5-1 plan) | −27,873 | $30.00 | $836.19K | 121,263 |
| Troy Coleman SVP, General Manager, Products | Nov 11, 2025 | Award | +73,530 | – | – | 73,530 |
| Roald Graham Webster VP, Chief Accounting Officer | Aug 22, 2025 | Sale | −8,266 | $32.81 | $271.21K | 17,300 |
| Richard R. Lury Director | Aug 12, 2025 | Sale | −7,000 | $31.81 | $222.67K | 18,857 |
| Jennie Raubacher Director | Aug 7, 2025 | Award | +5,932 | – | – | 14,976 |
| Yoshihiro Suzuki Director | Aug 7, 2025 | Award | +5,932 | – | – | 213,560 |
| Mary G. Puma Director | Aug 7, 2025 | Award | +5,932 | – | – | 17,483 |
| Joseph R. Martin Director | Aug 7, 2025 | Award | +5,932 | – | – | 35,179 |
| Richard R. Lury Director | Aug 7, 2025 | Award | +5,932 | – | – | 25,857 |
| Susan D. Lynch Director | Aug 7, 2025 | Award | +5,932 | – | – | 29,516 |
| Krishna G. Palepu Director | Aug 7, 2025 | Award | +5,932 | – | – | 9,961 |
| Erin Hagen SVP, CHRO | Aug 4, 2025 | Sale | −5,043 | $31.18 | $157.24K | 34,688 |
| Richard R. Lury Director | Jun 11, 2025 | Sale | −3,100 | $30.45 | $94.40K | 19,925 |
| Richard R. Lury Director | Jun 4, 2025 | Sale | −6,849 | $27.60 | $189.03K | 23,025 |
| Roald Graham Webster VP, Chief Accounting Officer | May 16, 2025 | Tax withholding | −4,948 | $27.51 | $136.12K | 25,566 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Jennie Raubacher Director | Aug 17, 2026 | 1,000 | $45.32K | Aug 17, 2026 | Restricted Stock Vesting |
| Erin Hagen Officer | Aug 10, 2026 | 2,285 | $101.43K | Aug 10, 2026 | Restricted Stock Vesting |
| Richard Madormo Officer | Jun 3, 2026 | 5,000 | $263.60K | Jun 3, 2026 | Restricted Stock Vesting |
| Troy Coleman Officer | May 22, 2026 | 4,500 | $205.74K | May 22, 2026 | Restricted Stock Vesting |
| Ian Kent Officer | May 18, 2026 | 2,642 | $109.80K | May 18, 2026 | Restricted Stock Vesting |
| Susan D. Lynch Director | May 14, 2026 | 16,711 | $759.62K | May 14, 2026 | Restricted Stock Vesting |
| Sharon Briansky Officer | May 11, 2026 | 8,948 | $425.38K | May 11, 2026 | Restricted Stock Vesting |
| Michael Doogue Officer, Director | May 11, 2026 | 30,089 | $1.42M | May 11, 2026 | Restricted Stock Vesting |
| Sharon Briansky Officer | Mar 2, 2026 | 9,727 | $340.45K | Mar 2, 2026 | Restricted Stock Vesting |
| Erin Hagen Officer | Mar 2, 2026 | 2,598 | $90.93K | Mar 2, 2026 | Restricted Stock Vesting |
| Sharon Briansky Officer | Feb 17, 2026 | 9,258 | $384.76K | Feb 17, 2026 | Restricted Stock Vesting |
| Sharon Briansky Officer | Dec 10, 2025 | 27,873 | $836.19K | Dec 10, 2025 | Restricted Stock Vesting |
| Richard R. Lury Director | Aug 12, 2025 | 7,000 | $222.67K | Aug 12, 2025 | Restricted Stock Vesting |
| Erin Hagen Officer | Aug 4, 2025 | 5,043 | $157.24K | Aug 4, 2025 | Restricted Stock Vesting |
| Richard R. Lury Director | Jun 11, 2025 | 3,100 | $94.40K | Jun 11, 2025 | Restricted Stock Vesting |