Allegro MicrosystemsALGM
13F holders, Q3 2024 (September 30)248holders −20
41new positions
60sold out
2famous investors
$23.29avg. 13F price*
At the end of Q3 2024, 248 institutions reported holding Allegro Microsystems Inc. (ALGM) in their 13F filings, down 20 from Q2 2024. 41 opened new positions and 60 sold out. The largest holders were FMR LLC ($658.3M), Vanguard Group Inc. ($343.0M) and BlackRock, Inc. ($299.3M). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Allegro Microsystems Inc.
- CUSIP
- 01749D105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2024 → Q3 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 41 | $268.3M |
| Exits | 60 | $117.0M |
All 13F filers, Q2 2024 → Q3 2024: 43,290,646 shares bought and 13,936,049 shares sold, net +29,354,597 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 248 holders
| FMR LLC | 0.04% | Add +43.3% | 28,253,811 | $658.3M |
| Vanguard Group Inc. | 0.01% | Add +69.7% | 14,719,541 | $343.0M |
| BlackRock, Inc. | 0.01% | — | 12,843,406 | $299.3M |
| JPMorgan Chase & Co. | 0.02% | Add +20.6% | 11,023,628 | $256.9M |
| State Street Corp. | 0.01% | Add +41.7% | 5,486,289 | $127.8M |
| Capital Research Global Investors | 0.03% | New | 5,414,432 | $126.2M |
| Clearbridge Investments, LLC | 0.07% | Add +6.9% | 3,932,071 | $91.6M |
| Invesco Ltd. | 0.01% | Reduce -45.0% | 3,255,275 | $75.8M |
| Wellington Management Group LLP | 0.01% | New | 3,059,634 | $71.3M |
| Geode Capital Management, LLC | 0.00% | Add +86.5% | 2,561,482 | $59.7M |
| Principal Financial Group Inc. | 0.03% | Add +14.1% | 2,499,760 | $58.2M |
| Manufacturers Life Insurance Company, The | 0.04% | Add +0.2% | 2,152,922 | $50.2M |
| Morgan Stanley | 0.00% | Reduce -2.0% | 2,036,894 | $47.5M |
| Westfield Capital Management Co. LP | 0.21% | Add +54.6% | 2,014,481 | $46.9M |
| Ameriprise Financial Inc. | 0.01% | Reduce -7.0% | 1,950,527 | $45.4M |
| Adage Capital Partners Gp, L.L.C. | 0.07% | Add +21.7% | 1,821,567 | $42.4M |
| Analog Century Management LP | 2.71% | Add +80.4% | 1,709,448 | $39.8M |
| T. Rowe Price Investment Management, Inc. | 0.02% | Reduce -44.8% | 1,574,706 | $36.7M |
| Woodline Partners LP | 0.30% | Add +7.2% | 1,548,132 | $36.1M |
| Artisan Partners Limited Partnership | 0.05% | Reduce -5.5% | 1,518,095 | $35.4M |
| Massachusetts Financial Services Co. | 0.01% | Add +47.6% | 1,453,004 | $33.9M |
| Macquarie Group Ltd. | 0.04% | Add +236126.1% | 1,410,270 | $32.9M |
| Two Sigma Investments, LP | 0.08% | Add +59.4% | 1,379,703 | $32.1M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +101.6% | 1,366,308 | $31.8M |
| Citadel Advisors | 0.03% | Add +1094.6% | 1,340,032 | $31.2M |
| Dimensional Fund Advisors LP | 0.01% | Add +2.5% | 1,314,513 | $30.6M |
| Norges Bank | 0.00% | Add +66.2% | 1,309,066 | $30.5M |
| Bank of New York Mellon Corp | 0.01% | Add +46.8% | 1,181,581 | $27.5M |
| GW&K Investment Management, LLC | 0.22% | Reduce -0.2% | 1,084,147 | $25.3M |
| First Trust Advisors LP | 0.02% | Add +1.8% | 1,056,688 | $24.6M |
| Federated Hermes, Inc. | 0.05% | Add +44.8% | 1,017,116 | $23.7M |
| Northern Trust Corp. | 0.00% | Add +81.5% | 945,707 | $22.0M |
| Loomis Sayles & Co. L P | 0.02% | New | 784,111 | $18.3M |
| Millennium Management | 0.01% | Reduce -33.5% | 673,070 | $15.7M |
| Balyasny Asset Management L.P. | 0.04% | Add +287.9% | 653,695 | $15.2M |
| Bank of America Corp. | 0.00% | Add +29.5% | 647,918 | $15.1M |
| Two Sigma Advisers, LP | 0.03% | Add +21.8% | 627,000 | $14.6M |
| New York State Common Retirement Fund | 0.02% | Reduce -17.8% | 601,679 | $14.0M |
| Comerica Bank | 0.05% | Add +75.8% | 580,631 | $13.5M |
| Alyeska Investment Group, L.P. | 0.07% | Add +187.5% | 575,001 | $13.4M |
| Silvercrest Asset Management Group LLC | 0.08% | Reduce -3.0% | 523,095 | $12.2M |
| Paloma Partners Management Co | 0.82% | New | 509,630 | $11.9M |
| Scout Investments, Inc. | 0.31% | Add +42.8% | 555,902 | $11.8M |
| Ghisallo Capital Management LLC | 0.63% | New | 500,000 | $11.7M |
| Schroder Investment Management Group | 0.01% | Reduce -22.6% | 431,468 | $10.5M |
| Sei Investments Co. | 0.01% | Add +129.4% | 380,555 | $8.9M |
| S Squared Technology, LLC | 3.65% | Add +8.9% | 367,451 | $8.6M |
| Rhumbline Advisers | 0.01% | Add +82.2% | 363,114 | $8.5M |
| Susquehanna International Group, LLP | 0.01% | Add +2913.9% | 350,452 | $8.2M |
| Lazard Asset Management LLC | 0.01% | Add +90.2% | 331,263 | $7.7M |
| UBS Group AG | 0.00% | Add +4.9% | 328,724 | $7.7M |
| Pier Capital, LLC | 1.06% | New | 322,495 | $7.5M |
| Granahan Investment Management, LLC | 0.26% | Add +29.1% | 283,275 | $6.6M |
| Trillium Asset Management, LLC | 0.16% | Reduce -2.6% | 277,557 | $6.5M |
| Penn Capital Management Company, LLC | 0.59% | Reduce -51.2% | 271,358 | $6.3M |
| Polar Asset Management Partners Inc. | 0.21% | New | 257,404 | $6.0M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.01% | Add +4.7% | 254,069 | $5.9M |
| ArrowMark Colorado Holdings LLC | 0.07% | Add +28.6% | 248,561 | $5.8M |
| Nuveen Asset Management, LLC | 0.00% | Add +25.5% | 246,131 | $5.7M |
| Swiss National Bank | 0.00% | Add +37.4% | 235,000 | $5.5M |
| Wells Fargo & Company | 0.00% | Add +21.3% | 234,672 | $5.5M |
| Retirement Systems of Alabama | 0.02% | Add +77.9% | 229,815 | $5.4M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -80.1% | 229,314 | $5.3M |
| Kennedy Capital Management LLC | 0.12% | Reduce -25.6% | 227,235 | $5.3M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Add +8.9% | 223,183 | $5.2M |
| Holocene Advisors, LP | 0.02% | Add +152.3% | 196,831 | $4.6M |
| Legal & General Group Plc | 0.00% | Add +65.2% | 195,063 | $4.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +7.8% | 194,322 | $4.5M |
| Alliancebernstein L.P. | 0.00% | Add +68.8% | 186,546 | $4.3M |
| Corebridge Financial, Inc. | 0.02% | Add +103.0% | 183,563 | $4.3M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.01% | New | 161,690 | $3.8M |
| State of Wisconsin Investment Board | 0.01% | Add +1.8% | 159,644 | $3.7M |
| Allianz Asset Management GmbH | 0.00% | No change | 120,454 | $2.8M |
| State of Alaska, Department of Revenue | 0.03% | Add +9.4% | 120,110 | $2.8M |
| Robbins Farley | 1.39% | Add +8.5% | 118,058 | $2.8M |
| California State Teachers Retirement System | 0.00% | Add +35.8% | 114,072 | $2.7M |
| Squarepoint Ops LLC | 0.01% | New | 94,669 | $2.2M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -14.8% | 86,455 | $2.0M |
| Mutual of America Capital Management LLC | 0.02% | Add +105.3% | 84,003 | $2.0M |
| State of New Jersey Common Pension Fund D | 0.01% | New | 81,095 | $1.9M |
| MetLife Investment Management, LLC | 0.01% | Add +111.6% | 79,763 | $1.9M |
| Raymond James & Associates | 0.00% | Reduce -8.7% | 77,236 | $1.8M |
| Barclays PLC | 0.00% | Add +88.1% | 75,620 | $1.8M |
| Royal Bank of Canada | 0.00% | Add +70.4% | 75,452 | $1.8M |
| Russell Investments Group, Ltd. | 0.00% | Add +38.1% | 74,819 | $1.7M |
| Needham Investment Management LLC | 0.13% | Add +42.2% | 72,500 | $1.7M |
| Amalgamated Bank | 0.01% | Add +99.1% | 72,399 | $1.7M |
| Man Group plc | 0.00% | Reduce -24.0% | 72,206 | $1.7M |
| Neuberger Berman Group LLC | 0.00% | New | 67,927 | $1.6M |
| Danske Bank A/S | 0.00% | Add +51.0% | 61,330 | $1.4M |
| Aurora Investment Counsel | 0.77% | Add +8.6% | 60,806 | $1.4M |
| T. Rowe Price Associates Inc. | 0.00% | Add +47.7% | 59,128 | $1.4M |
| Yousif Capital Management, LLC | 0.01% | Add +88.0% | 56,218 | $1.3M |
| Ecofi Investissements SA | 0.86% | Reduce -12.3% | 71,400 | $1.3M |
| Verition Fund Management LLC | 0.01% | Add +34.6% | 55,532 | $1.3M |
| Bayesian Capital Management, LP | 0.15% | Add +241.1% | 54,892 | $1.3M |
| Treasurer of the State of North Carolina | 0.01% | Add +64.0% | 53,668 | $1.3M |
| Amundi | 0.00% | Reduce -91.9% | 58,347 | $1.2M |
| Pacer Advisors, Inc. | 0.00% | Add +55.9% | 51,852 | $1.2M |
| Janus Henderson Group PLC | 0.00% | Add +42.1% | 51,229 | $1.2M |
| Crestline Management, L.P. | 0.06% | Reduce -66.5% | 48,554 | $1.1M |
| State of Tennessee, Department of Treasury | 0.00% | Add +37.1% | 48,000 | $1.1M |
| Atom Investors LP | 0.11% | Reduce -61.7% | 47,115 | $1.1M |
| LPL Financial LLC | 0.00% | Reduce -12.1% | 46,129 | $1.1M |
| Public Employees Retirement System of Ohio | 0.00% | Add +55.6% | 44,936 | $1.0M |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 43,823 | $1.0M |
| Louisiana State Employees Retirement System | 0.02% | Add +113.4% | 43,100 | $1.0M |
| Alps Advisors Inc. | 0.01% | Add +29.6% | 42,477 | $990K |
| Monashee Investment Management LLC | 0.10% | New | 40,000 | $932K |
| Citigroup Inc. | 0.00% | Reduce -58.7% | 38,691 | $902K |
| Guggenheim Capital LLC | 0.01% | Add +34.0% | 37,952 | $884K |
| State of Michigan Retirement System | 0.00% | Add +114.5% | 36,900 | $860K |
| Thrivent Financial for Lutherans | 0.00% | Add +111.5% | 36,516 | $851K |
| Arizona State Retirement System | 0.01% | Add +42.4% | 34,648 | $807K |
| Northwestern Mutual Investment Management Company, LLC | 0.02% | Add +116.2% | 34,485 | $804K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.01% | Add +116.3% | 34,263 | $798K |
| Sherbrooke Park Advisers LLC | 0.18% | New | 34,158 | $796K |
| M&T Bank Corp | 0.00% | Add +49.0% | 32,774 | $763K |
| Ameritas Investment Partners, Inc. | 0.02% | Add +109.8% | 31,889 | $743K |
| Victory Capital Management Inc. | 0.00% | Add +90.3% | 31,461 | $733K |
| Oregon Public Employees Retirement Fund | 0.01% | Add +112.5% | 31,437 | $732K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +58.5% | 31,292 | $729K |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | Reduce -15.8% | 30,691 | $715K |
| Natixis Advisors, LLC | 0.00% | Add +5.7% | 30,062 | $700K |
| ProShare Advisors LLC | 0.00% | Add +105.6% | 27,306 | $636K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Reduce -91.4% | 23,823 | $579K |
| Prelude Capital Management, LLC | 0.04% | Add +135.3% | 23,863 | $556K |
| Allspring Global Investments Holdings, LLC | 0.00% | Reduce -98.9% | 23,480 | $547K |
| Ensign Peak Advisors, Inc | 0.00% | No change | 23,466 | $547K |
| New York State Teachers Retirement System | 0.00% | Add +97.4% | 22,900 | $534K |
| SG Americas Securities, LLC | 0.00% | Reduce -16.9% | 22,783 | $531K |
| Teachers Retirement System of the State of Kentucky | 0.00% | No change | 22,733 | $530K |
| Circle Wealth Management, LLC | 0.01% | Add +204.1% | 22,561 | $525K |
| Virtu Financial LLC | 0.03% | New | 22,152 | $516K |
| Illinois Municipal Retirement Fund | 0.01% | No change | 22,032 | $513K |
| Bank of Montreal | 0.00% | New | 20,607 | $501K |
| Pathstone Holdings, LLC | 0.00% | Reduce -9.1% | 21,280 | $496K |
| Cresset Asset Management, LLC | 0.00% | Reduce -16.3% | 19,589 | $456K |
| HSBC Holdings PLC | 0.00% | Add +16.3% | 19,388 | $452K |
| American Century Companies Inc. | 0.00% | Add +15.7% | 19,237 | $448K |
| Canada Pension Plan Investment Board | 0.00% | New | 18,500 | $431K |
| Handelsbanken Fonder AB | 0.00% | No change | 18,500 | $431K |
| Advisors Asset Management, Inc. | 0.01% | Add +50.9% | 18,441 | $430K |
| Vanguard Personalized Indexing Management, LLC | 0.01% | Add +39.8% | 18,403 | $429K |
| Mackenzie Financial Corp. | 0.00% | Add +0.6% | 17,701 | $412K |
| Voya Investment Management LLC | 0.00% | Add +50.6% | 15,968 | $372K |
| Pictet Asset Management Holding SA | 0.00% | Add +70.9% | 15,966 | $372K |
| Toronto Dominion Bank | 0.00% | Add +49.4% | 15,832 | $369K |
| Readystate Asset Management LP | 0.05% | New | 15,761 | $367K |
| Quantinno Capital Management LP | 0.00% | Reduce -62.9% | 15,575 | $363K |
| Xponance LLC | 0.00% | Add +99.8% | 15,549 | $362K |
| PNC Financial Services Group, Inc. | 0.00% | Add +12.9% | 15,249 | $355K |
| Cetera Investment Advisers | 0.00% | Reduce -5.6% | 14,658 | $342K |
| Avior Wealth Management, LLC | 0.01% | Add +51.3% | 13,954 | $325K |
| Profund Advisors LLC | 0.01% | New | 13,326 | $310K |
| New Mexico Educational Retirement Board | 0.01% | No change | 13,300 | $310K |
| Prudential Financial Inc. | 0.00% | New | 12,899 | $301K |
| Creative Planning | 0.00% | Reduce -28.3% | 12,433 | $290K |
| Securian Asset Management, Inc. | 0.01% | Add +112.1% | 12,086 | $282K |
| Yorktown Management & Research Co Inc | 0.27% | New | 11,300 | $263K |
| Choreo, LLC | 0.00% | Reduce -35.5% | 11,894 | $262K |
| Commerce Bank | 0.00% | Reduce -3.3% | 11,115 | $259K |
| Prosperity Financial Group, Inc. | 0.14% | Add +7.9% | 10,657 | $248K |
| Keybank National Association | 0.00% | New | 10,238 | $239K |
| nVerses Capital, LLC | 0.11% | New | 9,900 | $231K |
| Osaic Holdings, Inc. | 0.00% | Reduce -29.6% | 9,744 | $227K |
| Teza Capital Management LLC | 0.02% | New | 9,679 | $226K |
| Intech Investment Management LLC | 0.00% | New | 9,191 | $214K |
| Simplex Trading, LLC | 0.01% | New | 8,802 | $205K |
| Public Employees Retirement Association of Colorado | 0.00% | No change | 7,635 | $178K |
| Assetmark, Inc. | 0.00% | Reduce -3.0% | 7,635 | $178K |
| Deutsche Bank AG | 0.00% | Reduce -96.3% | 6,628 | $154K |
| Van Eck Associates Corp. | 0.00% | New | 7,376 | $153K |
| Walleye Trading LLC | 0.00% | New | 5,531 | $129K |
| Sandia Investment Management LP | 0.19% | New | 5,000 | $117K |
| US Bancorp \de | 0.00% | Reduce -31.6% | 4,969 | $116K |
| Sterling Capital Management LLC | 0.00% | — | 4,606 | $107K |
| Mendota Financial Group, LLC | 0.05% | No change | 4,473 | $104K |
| Cwm, LLC | 0.00% | Reduce -13.1% | 3,684 | $86K |
| Walleye Capital LLC | 0.00% | New | 3,636 | $85K |
| KBC Group NV | 0.00% | Add +40.9% | 3,590 | $84K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -85.7% | 2,921 | $68K |
| State of Wyoming | 0.01% | Add +9.5% | 2,762 | $64K |
| GAMMA Investing LLC | 0.00% | Add +21.1% | 2,131 | $50K |
| Natixis | 0.00% | New | 2,090 | $49K |
| Clearstead Advisors, LLC | 0.00% | Add +47.5% | 1,895 | $44K |
| Fifth Third Bancorp | 0.00% | Reduce -88.7% | 1,385 | $32K |
| Quent Capital, LLC | 0.00% | Reduce -11.2% | 1,023 | $24K |
| CoreCap Advisors, LLC | 0.00% | Reduce -34.5% | 1,001 | $23K |
| Huntington National Bank | 0.00% | Reduce -20.5% | 933 | $22K |
| Signaturefd, LLC | 0.00% | Add +1.1% | 914 | $21K |
| Covestor Ltd | 0.01% | Reduce -71.5% | 888 | $21K |
| Quadrant Capital Group LLC | 0.00% | Reduce -50.3% | 820 | $19K |
| Riverview Trust Co | 0.02% | No change | 808 | $19K |
| UMB Bank, n.a. | 0.00% | Add +1675.0% | 639 | $15K |
| Nisa Investment Advisors, LLC | 0.00% | Add +1135.3% | 630 | $15K |
| Blue Trust, Inc. | 0.00% | Add +198.3% | 510 | $14K |
| Parallel Advisors, LLC | 0.00% | Reduce -16.1% | 556 | $13K |
| Global X Japan Co., Ltd. | 0.00% | Reduce -97.8% | 502 | $12K |
| Brooklyn Investment Group | 0.00% | New | 318 | $7K |
| Principal Securities, Inc. | 0.00% | Reduce -49.1% | 317 | $7K |
| Coppell Advisory Solutions LLC | 0.00% | No change | 303 | $7K |
| Leonteq Securities AG | 0.00% | Add +343.5% | 306 | $7K |
| First Horizon Advisors, Inc. | 0.00% | No change | 293 | $7K |
| Jaffetilchin Investment Partners, LLC | 0.00% | New | 275 | $6K |
| Farther Finance Advisors, LLC | 0.00% | Reduce -63.2% | 243 | $6K |
| Smartleaf Asset Management LLC | 0.00% | Add +152.3% | 217 | $5K |
| Spire Wealth Management | 0.00% | Add +3.7% | 226 | $5K |
| Lindbrook Capital, LLC | 0.00% | Reduce -52.1% | 218 | $5K |
| Allworth Financial LP | 0.00% | Reduce -52.9% | 193 | $4K |
| Brown Brothers Harriman & Co. | 0.00% | New | 182 | $4K |
| Householder Group Estate & Retirement Specialist, LLC | 0.00% | No change | 200 | $4K |
| Bessemer Group Inc. | 0.00% | Reduce -32.2% | 181 | $4K |
| Johnson Financial Group, Inc. | 0.00% | New | 168 | $4K |
| Global Retirement Partners, LLC | 0.00% | Add +100.0% | 150 | $3K |
| HM Payson & Co. | 0.00% | New | 147 | $3K |
| CI Investments Inc. | 0.00% | Reduce -0.9% | 108 | $3K |
| Parkside Financial Bank & Trust | 0.00% | Reduce -68.5% | 123 | $3K |
| Concord Wealth Partners | 0.00% | No change | 120 | $3K |
| Northwestern Mutual Wealth Management Co. | 0.00% | New | 120 | $3K |
| Private Wealth Management Group, LLC | 0.00% | Add +89.4% | 89 | $2K |
| Pineridge Advisors LLC | 0.00% | No change | 85 | $2K |
| IFP Advisors, Inc | 0.00% | Reduce -83.8% | 74 | $2K |
| Creekmur Asset Management LLC | 0.00% | Reduce -72.5% | 70 | $2K |
| Jones Financial Companies LLLP | 0.00% | New | 66 | $2K |
| St. Johns Investment Management Company, LLC | 0.00% | No change | 50 | $1K |
| AdvisorNet Financial, Inc | 0.00% | Add +614.3% | 50 | $1K |
| CENTRAL TRUST Co | 0.00% | No change | 50 | $1K |
| Bell Investment Advisors, Inc | 0.00% | Reduce -27.3% | 48 | $1K |
| Twin Tree Management, LP | 0.00% | Reduce -99.9% | 47 | $1K |
| Lanark Financial, Inc. | 0.00% | New | 46 | $1K |
| Arax Advisory Partners | 0.00% | Reduce -26.9% | 38 | $886 |
| Farmers & Merchants Investments Inc. | 0.00% | No change | 25 | $583 |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -69.5% | 25 | $583 |
| Rakuten Securities, Inc. | 0.00% | Reduce -26.7% | 22 | $513 |
| MassMutual Private Wealth & Trust, FSB | 0.00% | Reduce -47.6% | 22 | $513 |
| JFS Wealth Advisors, LLC | 0.00% | Reduce -8.3% | 22 | $513 |
| NewEdge Advisors, LLC | 0.00% | No change | 20 | $466 |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 19 | $443 |
| Raleigh Capital Management Inc. | 0.00% | No change | 15 | $350 |
| SJS Investment Consulting Inc. | 0.00% | Reduce -12.5% | 7 | $164 |
| DiNuzzo Private Wealth, Inc. | 0.00% | Reduce -16.7% | 5 | $117 |
| MV Capital Management, Inc. | 0.00% | Reduce -92.3% | 2 | $47 |
| Claris Advisors, LLC / Mo / | 0.00% | New | 2 | $47 |
| TFC Financial Management, Inc. | 0.00% | New | 1 | $24 |
| Capital Advisors, Ltd. LLC | 0.00% | Reduce -75.6% | 10 | $0 |
| Avion Wealth | 0.00% | Reduce -46.0% | 20 | $0 |
| Hemington Wealth Management | 0.00% | New | 1 | $0 |
"% of holder's portfolio" is ALGM's weight in each manager's 13F, not the share of Allegro Microsystems Inc. the manager owns.