ALLEGRO MICROSYSTEMS INC ALGM
COM · Common Stock · CUSIP 01749D105 · ISIN US01749D1054
- SectorTechnology
- IndustrySemiconductors & Related Devices
- HeadquartersManchester, NH
- Founded1979
- Websiteallegromicro.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.9m this quarter). Holder counts are more reliable. Shares outstanding: 184.1m as of 2025-01-27, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $25.14. Options: 20 managers hold calls ($38.2m notional), 15 hold puts ($78.8m).
Trends to Q1 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 170 |
| Q4 2022 | 219 |
| Q1 2023 | 313 |
| Q2 2023 | 353 |
| Q3 2023 | 312 |
| Q4 2023 | 289 |
| Q1 2024 | 278 |
| Q2 2024 | 269 |
| Q3 2024 | 249 |
| Q4 2024 | 257 |
| Q1 2025 | 293 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2023 | 211 | 142 |
| Q3 2023 | 178 | 175 |
| Q4 2023 | 151 | 171 |
| Q1 2024 | 146 | 145 |
| Q2 2024 | 147 | 129 |
| Q3 2024 | 156 | 129 |
| Q4 2024 | 111 | 148 |
| Q1 2025 | 170 | 112 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $40.8m | $16.9m | 0.41 |
| Q3 2024 | $24.4m | $62.5m | 2.56 |
| Q4 2024 | $29.9m | $17.1m | 0.57 |
| Q1 2025 | $38.2m | $78.8m | 2.06 |
Biggest buyers
| Capital Research Global Investors | Added | +5.3m |
| FMR LLC | Added | +4.1m |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Added | +2.8m |
| CITADEL ADVISORS LLC | Added | +2.8m |
| Invesco Ltd. | Added | +2.7m |
| Balyasny Asset Management L.P. | Added | +1.8m |
| Kodai Capital Management LP | New | +1.7m |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | Added | +1.4m |
| VOYA INVESTMENT MANAGEMENT LLC | Added | +1.3m |
| SEGALL BRYANT & HAMILL, LLC | New | +1.3m |
Biggest sellers
| WESTFIELD CAPITAL MANAGEMENT CO LP | Reduced | -1.9m |
| Woodline Partners LP | Reduced | -1.8m |
| JPMORGAN CHASE & CO | Reduced | -1.5m |
| Artisan Partners Limited Partnership | Sold out | -1.4m |
| Paloma Partners Management Co | Reduced | -1.4m |
| TWO SIGMA INVESTMENTS, LP | Reduced | -1.3m |
| Meridiem Capital Partners LP | Reduced | -900.1k |
| STATE STREET CORP | Reduced | -792.9k |
| T. Rowe Price Investment Management, Inc. | Reduced | -785.6k |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -744.8k |
Biggest calls
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | Added | $13.1m520.0k shares |
| Balyasny Asset Management L.P. | New | $6.9m275.0k shares |
| TIG Advisors, LLC | New | $5.0m200.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.6m103.1k shares |
| Cinctive Capital Management LP | New | $2.0m80.0k shares |
| Cubist Systematic Strategies, LLC | Reduced | $1.3m50.6k shares |
| IMC-Chicago, LLC | Reduced | $947.4k37.7k shares |
| CITADEL ADVISORS LLC | Reduced | $887.1k35.3k shares |
| UBS Group AG | Reduced | $789.1k31.4k shares |
| Walleye Capital LLC | Added | $771.5k30.7k shares |
Biggest puts
| BANK OF AMERICA CORP /DE/ | New | $53.4m2.1m shares |
| JANE STREET GROUP, LLC | New | $14.0m557.0k shares |
| CITADEL ADVISORS LLC | Reduced | $2.3m92.6k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $1.9m76.6k shares |
| GROUP ONE TRADING LLC | Added | $1.9m75.1k shares |
| Cubist Systematic Strategies, LLC | Reduced | $1.6m65.6k shares |
| UBS Group AG | Unchanged | $879.5k35.0k shares |
| TIG Advisors, LLC | New | $869.5k34.6k shares |
| WOLVERINE TRADING, LLC | Added | $541.9k21.8k shares |
| IMC-Chicago, LLC | Added | $527.7k21.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Invesco Ltd. 13G · institution new · filed 2026-08-13 | 7.3% |
| Capital Research Global Investors 13G · institution -1.5 pts · filed 2026-02-12 | 7.1% |
| BlackRock, Inc. 13G · institution filed 2026-07-27 | 6.9% |
| JPMORGAN CHASE & CO 13G · institution +2.0 pts · filed 2026-07-16 | 6.8% |
| FMR LLC 13G · institution -8.4 pts · filed 2026-10-07 | 5.3% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26)
Insider purchases and sales in Q1 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 2 | $243.4k | 1 | $658.4k | — |
| Q4 2023 | 2 | $37.4k | 0 | — | — |
| Q1 2024 | 0 | — | 1 | $476.6k | $476.6k |
| Q2 2024 | 0 | — | 1 | $255.0k | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 2 | $384.4k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
None reported in Q1 2025.
Holders, Q1 2025
| Manager | Shares | Change |
|---|---|---|
| FMR LLC 0.04% of their portfolio | 26.9m $676.5m | Added +4.1m |
| VANGUARD GROUP INC 0.01% of their portfolio | 14.1m $354.3m | Added +17.1k |
| BlackRock, Inc. 0.01% of their portfolio | 11.7m $293.3m | Reduced -86.0k |
| Capital Research Global Investors 0.06% of their portfolio | 11.1m $278.0m | Added +5.3m |
| JPMORGAN CHASE & CO 0.02% of their portfolio | 9.0m $226.1m | Reduced -1.5m |
| STATE STREET CORP 0.01% of their portfolio | 5.1m $127.8m | Reduced -792.9k |
| Invesco Ltd. 0.02% of their portfolio | 4.8m $121.5m | Added +2.7m |
| CITADEL ADVISORS LLC 0.11% of their portfolio | 4.3m $108.9m | Added +2.8m |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 3.2m $81.6m | Reduced -744.8k |
| Clearbridge Investments, LLC 0.07% of their portfolio | 3.2m $79.5m | Reduced -223.4k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.80% of their portfolio | 2.9m $73.1m | Added +2.8m |
| MORGAN STANLEY 0.00% of their portfolio | 2.6m $66.6m | Reduced -8.4k |
| MACQUARIE GROUP LTD 0.08% of their portfolio | 2.6m $66.2m | Added +1.2m |
| PRINCIPAL FINANCIAL GROUP INC 0.03% of their portfolio | 2.4m $60.7m | Added +144.8k |
| MILLENNIUM MANAGEMENT LLC 0.06% of their portfolio | 2.4m $60.4m | Added +1.1m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.4m $60.0m | Added +23.5k |
| Balyasny Asset Management L.P. 0.15% of their portfolio | 2.3m $58.5m | Added +1.8m |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 2.74% of their portfolio | 2.3m $57.1m | Added +1.4m |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.10% of their portfolio | 2.1m $53.0m | Reduced -625.1k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 2.0m $49.5m | Added +248.8k |
| Analog Century Management LP 3.93% of their portfolio | 1.9m $48.6m | Reduced -69.3k |
| Kodai Capital Management LP 1.65% of their portfolio | 1.7m $41.6m | New |
| Freestone Grove Partners LP 0.42% of their portfolio | 1.6m $40.3m | Added +1.2m |
| UBS Group AG 0.01% of their portfolio | 1.5m $36.7m | Added +118.7k |
| VOYA INVESTMENT MANAGEMENT LLC 0.02% of their portfolio | 1.3m $33.6m | Added +1.3m |
| SEGALL BRYANT & HAMILL, LLC 0.51% of their portfolio | 1.3m $33.0m | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.3m $32.5m | Added +953.8k |
| T. Rowe Price Investment Management, Inc. 0.02% of their portfolio | 1.3m $32.2m | Reduced -785.6k |
| NORGES BANK 0.00% of their portfolio | 1.3m $31.8m | Added +34.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.2m $29.3m | Added +31.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.1m $27.4m | Added +15.3k |
| GW&K Investment Management, LLC 0.25% of their portfolio | 1.1m $26.5m | Added +24.4k |
| LOOMIS SAYLES & CO L P 0.04% of their portfolio | 1.0m $26.1m | Added +167.1k |
| Schonfeld Strategic Advisors LLC 0.18% of their portfolio | 1.0m $26.0m | Reduced -584.5k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 996.6k $25.0m | Reduced -63.6k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 993.3k $25.0m | Added +300.5k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 953.7k $24.0m | Added +425.5k |
| Cinctive Capital Management LP 1.89% of their portfolio | 942.7k $23.7m | New |
| Paloma Partners Management Co 3.34% of their portfolio | 709.0k $17.8m | Reduced -1.4m |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.12% of their portfolio | 659.4k $16.6m | Added +21.8k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 610.2k $15.3m | Reduced -462.8k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 546.9k $13.7m | Reduced -251.1k |
| Oasis Management Co Ltd. 4.36% of their portfolio | 530.2k $13.3m | New |
| FIFTHDELTA Ltd 3.18% of their portfolio | 505.6k $12.7m | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 503.2k $12.6m | Added +142.7k |
| Walleye Capital LLC 0.14% of their portfolio | 489.3k $12.3m | Reduced -226.1k |
| Alyeska Investment Group, L.P. 0.05% of their portfolio | 469.6k $11.8m | Added +44.6k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 457.8k $11.5m | New |
| Talos Eurisko Asset Management LP 4.79% of their portfolio | 449.6k $11.3m | Reduced -293.5k |
| S SQUARED TECHNOLOGY, LLC 5.11% of their portfolio | 397.5k $10.0m | Added +30.0k |
| Allspring Global Investments Holdings, LLC 0.02% of their portfolio | 394.6k $10.3m | Added +372.0k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 382.7k $9.6m | Added +9.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 354.6k $8.9m | Added +85.6k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 330.3k $8.3m | Added +4.4k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 327.2k $8.1m | Added +269.9k |
| TRILLIUM ASSET MANAGEMENT, LLC 0.24% of their portfolio | 326.6k $8.2m | Added +69.8k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.04% of their portfolio | 303.7k $7.6m | Reduced -1.9m |
| ArrowMark Colorado Holdings LLC 0.12% of their portfolio | 288.4k $7.2m | Added +21.1k |
| Jain Global LLC 0.15% of their portfolio | 285.0k $7.2m | Added +95.0k |
| Pier Capital, LLC 1.20% of their portfolio | 284.8k $7.2m | Reduced -158.1k |
| COMERICA BANK 0.03% of their portfolio | 273.2k $6.9m | Reduced -376.6k |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.22% of their portfolio | 268.4k $6.7m | New |
| LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio | 264.6k $6.7m | Reduced -140.1k |
| Meridiem Capital Partners LP 0.69% of their portfolio | 249.9k $6.3m | Reduced -900.1k |
| Swiss National Bank 0.00% of their portfolio | 249.5k $6.3m | Reduced -3.7k |
| Polar Asset Management Partners Inc. 0.19% of their portfolio | 232.1k $5.8m | Reduced -146.6k |
| Retirement Systems of Alabama 0.02% of their portfolio | 200.1k $5.0m | Added +279 |
| Legal & General Group Plc 0.00% of their portfolio | 195.8k $4.9m | Added +6.4k |
| Lightrock Netherlands B.V. 1.28% of their portfolio | 192.8k $4.9m | Reduced -10.7k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 189.9k $4.8m | Reduced -22.1k |
| OSTERWEIS CAPITAL MANAGEMENT INC 0.22% of their portfolio | 179.3k $4.5m | New |
| TIG Advisors, LLC 0.26% of their portfolio | 161.3k $4.1m | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 161.0k $4.0m | Added +23.2k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.01% of their portfolio | 157.2k $4.0m | Added +17.0k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 155.4k $3.9m | Added +35.4k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 152.0k $3.8m | Added +36.2k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 150.6k $3.8m | First filing |
| Corebridge Financial, Inc. 0.02% of their portfolio | 144.3k $3.6m | Reduced -3.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 138.8k $3.5m | Added +71.2k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 132.1k $3.3m | Reduced -124.8k |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio | 131.2k $3.3m | Added +102.4k |
| BARCLAYS PLC 0.00% of their portfolio | 124.2k $3.1m | Reduced -32.1k |
| Nuveen, LLC 0.00% of their portfolio | 123.7k $4.1m | First filing |
| Polymer Capital Management (US) LLC 0.93% of their portfolio | 122.8k $3.1m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.07% of their portfolio | 119.5k $3.0m | Reduced -43.3k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 117.9k $3.0m | Added +48.6k |
| Verition Fund Management LLC 0.02% of their portfolio | 114.9k $2.9m | Reduced -4.7k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 109.0k $2.7m | Reduced -1.3m |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 105.7k $2.7m | Added +64.9k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 105.0k $2.6m | Added +28.2k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 101.6k $2.6m | Reduced -646 |
| CITIGROUP INC 0.00% of their portfolio | 99.0k $2.5m | Reduced -34.2k |
| Holocene Advisors, LP 0.01% of their portfolio | 93.4k $2.3m | Reduced -116.8k |
| KETTLE HILL CAPITAL MANAGEMENT, LLC 0.64% of their portfolio | 93.4k $2.3m | Reduced -729.6k |
| State of Tennessee, Department of Treasury 0.01% of their portfolio | 93.4k $2.3m | Unchanged |
| Squarepoint Ops LLC 0.01% of their portfolio | 87.6k $2.2m | Added +74.8k |
| New Age Alpha Advisors, LLC 0.10% of their portfolio | 85.1k $2.1m | Reduced -35.6k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 84.4k $2.1m | Added +4.5k |
| Lisanti Capital Growth, LLC 0.59% of their portfolio | 79.1k $2.0m | New |
| ROYCE & ASSOCIATES LP 0.02% of their portfolio | 78.2k $2.0m | New |