13F

Stock

Allegro Microsystems, Inc.

ALGM · held by 317 managers

Reported value

$4.24B

Holders

317

+60 new · −39 exited

Holders’ est. mark

$510M

Price effect on 199 books still in the name

Largest holder

$864.6M

Fidelity

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Fidelity27.4M$864.6M$121.7MAdded$241.1M
BlackRock, Inc.12.5M$394M$62.8MAdded$72.1M
Capital Research Global Investors12.4M$392.1M$64MAdded$46.2M
Invesco Ltd.8.75M$275.9M$39.4MAdded$74.1M
VANGUARD PORTFOLIO MANAGEMENT LLC7.92M$249.7MHeld
JPMORGAN CHASE & CO8.65M$242.6M$12.2MAdded$48.8M
VANGUARD CAPITAL MANAGEMENT LLC5.46M$172.3MHeld
State Street5.23M$164.8M$26.9MAdded$23.5M
Clearbridge Investments, LLC2.86M$90.3M$14.7MAdded$13.3M
GEODE CAPITAL MANAGEMENT, LLC2.46M$77.5M$12.3MAdded$14.3M
MORGAN STANLEY2.28M$71.7M$11.5MAdded$12.8M
DIMENSIONAL FUND ADVISORS LP2.17M$68.4M$11MAdded$11.9M
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.2.08M$65.6M$10.5MAdded$11.9M
PRINCIPAL FINANCIAL GROUP INC1.79M$56.5M$8.97MAdded$10.5M
LOOMIS SAYLES & CO L P1.67M$52.8M$4.27MAdded$30.9M
ADAGE CAPITAL PARTNERS GP, L.L.C.1.46M$46.2M$7.54MCut−$27.8M
VOYA INVESTMENT MANAGEMENT LLC1.46M$46M$4.84MAdded$21.2M
ALLIANCEBERNSTEIN L.P.1.72M$45.5M$0Added$15.2M
GOLDMAN SACHS GROUP INC1.44M$45.3M$4.1MAdded$24.3M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC1.39M$43.8M$7.02MAdded$7.91M
NORTHERN TRUST CORP1.05M$33M$5.23MAdded$6.19M
SEGALL BRYANT & HAMILL, LLC1.04M$32.9M$5.38MAdded$17.9K
RAYMOND JAMES FINANCIAL INC995.8K$31.4M$4.68MAdded$7.43M
Nuveen, LLC947.5K$29.9M$1.25MAdded$23.5M
KENNEDY CAPITAL MANAGEMENT LLC910K$28.7M$231KAdded$27.5M
BANK OF AMERICA CORP /DE/855.5K$27M$2.97MAdded$11.8M
VANGUARD FIDUCIARY TRUST CO765.9K$24.1MHeld
Bank of New York Mellon Corp743.3K$23.4M$3.83MAdded$3.64M
MARSHALL WACE, LLP739.8K$23.3M$3.68MAdded$4.47M
Aperture Investors, LLC709.7K$22.4MNew
SILVERCREST ASSET MANAGEMENT GROUP LLC707.9K$22.3M$3.48MAdded$4.49M
WELLINGTON MANAGEMENT GROUP LLP673.1K$21.2M$3.47MCut−$7.96M
TWO SIGMA INVESTMENTS, LP639.8K$20.2M$1.6MAdded$12M
Lightrock Netherlands B.V.508K$16M$1.83MAdded$6.67M
Talos Eurisko Asset Management LP493.2K$15.5M$2.54MAdded$771.7K
S Squared Technology, LLC457.5K$14.4M$2.36MAdded$2.36M
UBS Group AG435.4K$13.7M$1.41MAdded$6.49M
FIRST TRUST ADVISORS LP414.9K$13.1M$2.14MAdded$1.24M
Citadel399.4K$12.6M$2.06MCut−$55M
AMERIPRISE FINANCIAL INC359.3K$11.3M$1.85MAdded$1.48M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC345.1K$10.9M$1.7MAdded$2.16M
Icahn Capital345.1K$10.3M$1.17MAdded$1.68M
Allspring Global Investments Holdings, LLC307.6K$10.2M$1.97MAdded$663.2K
Gotham Asset Management, LLC312.2K$9.85M$376.4KAdded$7.92M
RHUMBLINE ADVISERS308.4K$9.72M$1.55MAdded$1.8M
JACOBS LEVY EQUITY MANAGEMENT, INC308.1K$9.71MNew
Man Group plc306.3K$9.66M$1.58MCut−$552.6K
SIRIOS CAPITAL MANAGEMENT L P298.4K$9.41MNew
FRONTIER CAPITAL MANAGEMENT CO LLC264K$8.32M$1.36MCut−$5.52M
PEREGRINE CAPITAL MANAGEMENT LLC259.8K$8.19M$1.34MAdded$1.04M
Swiss National Bank256.4K$8.08M$1.32MAdded$1.35M
Balyasny Asset Management L.P.245.9K$7.75M$1.27MCut−$13.6M
Pier Capital, LLC226.6K$7.14M$1.17MAdded$1.04M
SEI INVESTMENTS CO219K$6.9M$499.1KAdded$4.35M
Granahan Investment Management, LLC215K$6.78M$462.8KAdded$4.41M
G2 Investment Partners Management LLC208.6K$6.58MNew
Retirement Systems of Alabama193.2K$6.09M$977.8KAdded$1.08M
KETTLE HILL CAPITAL MANAGEMENT, LLC181.5K$5.72MNew
Roubaix Capital, LLC170K$5.36MNew
Legal & General Group Plc164.7K$5.19M$848KAdded$294.7K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM149.8K$4.72M$633.4KAdded$1.48M
CASTLEARK MANAGEMENT LLC147.4K$4.65MNew
TRILLIUM ASSET MANAGEMENT, LLC127.6K$4.44M$935.3KAdded$703K
Quantinno Capital Management LP133.9K$4.22M$336.6KAdded$2.5M
Trexquant Investment LP133.8K$4.22M$409.4KAdded$2.12M
Walleye Capital LLC130.7K$4.12M$18.6KAdded$4.02M
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.127.4K$4.02M$431.6KAdded$1.81M
Renaissance Technologies123.9K$3.91M$638.1KCut−$7.6M
CANADA PENSION PLAN INVESTMENT BOARD122K$3.85M$92.7KAdded$3.37M
ArrowMark Colorado Holdings LLC120.8K$3.81M$622KAdded$121.4K
VANGUARD ASSET MANAGEMENT, Ltd116.1K$3.66MHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP115.4K$3.64M$594.2KAdded$95.7K
CITIGROUP INC106.2K$3.35M$546.7KAdded$542.8K
Russell Investments Group, Ltd.96.1K$3.03M$109.4KAdded$2.47M
Brevan Howard Capital Management LP95.1K$3MNew
STATE OF WISCONSIN INVESTMENT BOARD95K$2.99M$489KAdded$418.9K
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM92.8K$2.93M$477.9KAdded$477.9K
Candriam S.C.A.86.1K$2.71M$443.2KAdded$395.3K
MANUFACTURERS LIFE INSURANCE COMPANY, THE81.1K$2.56M$417.5KAdded$386.4K
State of Tennessee, Department of Treasury79.2K$2.5M−$426.3KCut−$426.3K
WELLS FARGO & COMPANY/MN73.5K$2.32M$336.6KAdded$591.7K
Mitsubishi UFJ Asset Management Co., Ltd.71K$2.24M$327.8KAdded$236.1K
MASSACHUSETTS FINANCIAL SERVICES CO /MA/69.3K$2.18M$356.9KAdded$70.4K
XTX Topco Ltd68.6K$2.16M$132KAdded$1.49M
Entropy Technologies, LP67.7K$2.14M$184.9KAdded$1.19M
State of New Jersey Common Pension Fund D62K$1.96M$319.4KCut−$495.9K
MetLife Investment Management, LLC61.1K$1.92M$312KAdded$326.6K
NEUBERGER BERMAN GROUP LLC58K$1.83M$298.6KCut−$1.33M
JANUS HENDERSON GROUP PLC57.3K$1.81M$295.2KAdded$295.2K
Sphera Management Technology Funds Ltd57.1K$1.8M$206KAdded$746.7K
NEEDHAM INVESTMENT MANAGEMENT LLC55K$1.73M$206KAdded$679K
BW Gestao de Investimentos Ltda.55K$1.73MNew
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC54K$1.7MNew
GUGGENHEIM CAPITAL LLC53.7K$1.69M$234.7KAdded$490.7K
Police & Firemen's Retirement System of New Jersey53.3K$1.68M$269.2KAdded$302.2K
BOOTHBAY FUND MANAGEMENT, LLC51.4K$1.62MNew
Vanguard Global Advisers, LLC50.7K$1.6MHeld
Summit Trail Advisors, LLC50.2K$1.58M$258.6KCut−$856.8K
Zurcher Kantonalbank (Zurich Cantonalbank)48.6K$1.53M$220.1KAdded$405.2K
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC47.6K$1.5M$245KAdded$138.4K
NEW YORK STATE COMMON RETIREMENT FUND46.3K$1.46M$238.6KAdded$117.3K
Y-Intercept (Hong Kong) Ltd45.1K$1.42MNew
ENVESTNET ASSET MANAGEMENT INC44.9K$1.42M$189.5KAdded$445.9K
ExodusPoint Capital Management, LP44.9K$1.42MNew
MAVERICK CAPITAL LTD42.2K$1.33MNew
BARCLAYS PLC40.3K$1.27M$207.8KCut−$1.06M
JONES FINANCIAL COMPANIES LLLP39.9K$1.2M$1.41KAdded$1.19M
TUDOR INVESTMENT CORP ET AL37.1K$1.17M$132.2KAdded$493.6K
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO36.6K$1.15M$188.6KAdded$154.9K
Engineers Gate Manager LP36.5K$1.15M$188.2KCut−$9.92M
YOUSIF CAPITAL MANAGEMENT, LLC36.2K$1.14M−$52.2KCut−$119.5K
LPL Financial LLC36.1K$1.14M$167.2KAdded$280.9K
Louisiana State Employees Retirement System36K$1.14M$176.6KAdded$230.2K
ARIZONA STATE RETIREMENT SYSTEM35.6K$1.12M$183.3KAdded$171.5K
Creative Planning32.6K$1.03M$130.8KAdded$356.2K
Vanguard Investments Australia, Ltd.31.8K$1MHeld
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS31.1K$980.7K$159.8KAdded$162K
Universal- Beteiligungs- und Servicegesellschaft mbH30.9K$973.1K$88KAdded$522.4K
ROYAL BANK OF CANADA30.3K$957K$156.8KCut−$33K
STATE OF MICHIGAN RETIREMENT SYSTEM29.9K$942.7K$150.9KAdded$169.8K
FIFTH THIRD BANCORP29.1K$916.4K$6.04KAdded$885.4K
LECAP ASSET MANAGEMENT LTD28.5K$899.3K$146.9KAdded$115.9K
KLP KAPITALFORVALTNING AS28.5K$898.6K$141.6KAdded$173.2K
Tidal Investments LLC28.5K$897.4K$119.1KAdded$287.1K
ALTFEST L J & CO INC28.2K$888.1K$83.9KAdded$458.5K
MILLENNIUM MANAGEMENT LLC28.1K$886.8K$144.9KCut−$34.5M
Pinnacle Financial Partners, Inc.28.1K$886.5K$144.8KAdded$29.8K
NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC27.8K$876.9K$142.9KAdded$144.9K
OREGON PUBLIC EMPLOYEES RETIREMENT FUND25.4K$802K$127.4KAdded$149.5K
FOX RUN MANAGEMENT, L.L.C.28K$784.8K$46.5KCut−$79.1K
Advisors Asset Management, Inc.24.6K$775.8K$122.3KAdded$149.4K
Pathstone Holdings, LLC24.4K$767.9K$60.8KAdded$456.3K
PRENTISS SMITH & CO INC24.3K$765.7K$125.1KAdded$104.6K
DEUTSCHE BANK AG\24.1K$760.5K$103.9KAdded$228.1K
Sumitomo Mitsui Trust Group, Inc.23.7K$747.6K$122.1KAdded$122.1K
LAZARD ASSET MANAGEMENT LLC23.7K$747.6K$122.1KAdded$122.1K
Ameritas Investment Partners, Inc.22.7K$716.7K$117.1KAdded$117.1K
ALPS ADVISORS INC22.6K$712.3K$116.3KCut−$73.5K
Pictet Asset Management Holding SA22.4K$705.5K$107.1KAdded$157.2K
MOODY NATIONAL BANK TRUST DIVISION22.4K$704.9K$115.1KCut−$309.9K
CenterBook Partners LP21.8K$688.8KNew
BNP PARIBAS FINANCIAL MARKETS20.8K$655K$107KCut−$4.59M
VICTORY CAPITAL MANAGEMENT INC19.8K$624.7K$96.4KAdded$130.9K
Circle Wealth Management, LLC19.8K$624.7K$72.1KAdded$255.4K
Vontobel Holding Ltd.19.3K$609.5K$84.5KAdded$176.6K
Vestmark Advisory Solutions, Inc.18.8K$592.6KNew
Ethic Inc.18.6K$587.2K$95.9KAdded$84.1K
HSBC HOLDINGS PLC18.4K$575K$89.8KCut−$477.5K
Integrated Wealth Concepts LLC17.4K$548.3K$89.6KAdded$74.1K
TSG Advice Partners, LLC17.2K$542.1K$88.4KAdded$89.2K
Rockefeller Capital Management L.P.17.1K$539.9K$86.9KAdded$94.7K
MIRABELLA FINANCIAL SERVICES LLP17.1K$538.6KNew
Graham Capital Management, L.P.17K$534.6K$87.3KCut−$59.8K
Bridgewater16.6K$524.8KNew
XPONANCE LLC16.3K$515.1K$65.6KAdded$179.1K
ProShare Advisors LLC16.3K$514.9K$84.1KCut−$33.1K
COMMERCE BANK15.6K$493.3K$52.8KAdded$222.8K
AMERICAN CENTURY COMPANIES INC15.6K$491.8K$52.9KAdded$220.8K
PEAK6 LLC15.5K$488.8K$79.8KCut−$237.7K
Vanguard Personalized Indexing Management, LLC15.5K$488.7K$73.5KAdded$112.3K
JANE STREET GROUP, LLC15.5K$488.1K$79.7KCut−$4.29M
Mirae Asset Global Investments Co., Ltd.15.2K$480.3K$61.3KAdded$166.5K
PNC Financial Services Group, Inc.13.9K$439.8K$60.9KAdded$128K
Corient Private Wealth LLC13.9K$438.2K$46.4KAdded$30.6K
CWM, LLC13.9K$437K$436.6KAdded$436.6K
State of Wyoming13.8K$436.2K$54.9KAdded$154.7K
Catalyst Funds Management Pty Ltd13.5K$425.7KNew
Brooklyn Investment Group13.2K$416.4KNew
BANK OF MONTREAL /CAN/13.1K$414.4K$67.7KAdded$43.1K
Alpine Global Management, LLC12.6K$398.2KNew
KEYBANK NATIONAL ASSOCIATION/OH12.4K$390.3K$63.8KAdded$32.5K
Schonfeld Strategic Advisors LLC11.7K$368.9K$60.2KCut−$19.5M
Cetera Investment Advisers11.7K$367.5K$60KAdded$53.6K
Vident Advisory, LLC11.4K$359.7K$58.7KCut−$15.5K
MERCER GLOBAL ADVISORS INC /ADV11.3K$357.9K$54.1KAdded$80.8K
Yorktown Management & Research Co Inc11.3K$356.3K$58.2KAdded$58.2K
MML INVESTORS SERVICES, LLC11K$346K$56.5KCut−$468.9K
CAPTRUST FINANCIAL ADVISORS10.9K$343.9KNew
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC10.1K$330.3K$10.8KCut−$19.1K
Fieldview Capital Management, LLC10.3K$323.2KNew
Caitong International Asset Management Co., Ltd9.89K$311.7K$93Added$311.2K
FEDERATED HERMES, INC.9.87K$311.1K$50.8KAdded$48K
GILDER GAGNON HOWE & CO LLC9.49K$299.3KNew
GROUP ONE TRADING LLC9.41K$296.8KNew
EVERGREEN CAPITAL MANAGEMENT LLC9.34K$294.4K$41.4KAdded$82.1K
SECURIAN ASSET MANAGEMENT, INC9.15K$288.5K$46.5KAdded$50.4K
PROFUND ADVISORS LLC8.24K$259.7K$42.4KAdded$15.8K
BAILARD, INC.8.1K$255.4KNew
Swiss Life Asset Management Ltd8.01K$252.5KNew
SEB Asset Management AB7.8K$245.9KHeld
ELEVATION POINT WEALTH PARTNERS, LLC7.69K$242.5KNew
Jefferies Financial Group Inc.7.65K$241.3KNew
PRUDENTIAL FINANCIAL INC7.39K$233.2K$38.1KAdded$17.9K
DNB Asset Management AS6.92K$218.3KNew
SIH Partners, LLLP6.87K$216.7KNew
Machina Capital S.A.S.6.85K$215.9KNew
Maryland State Retirement & Pension System6.8K$214.3KNew
Headlands Technologies LLC6.68K$210.8KNew
Utah Retirement Systems6.5K$205.1KNew
Freestone Grove Partners LP6.43K$202.8KNew
Arax Advisory Partners6.37K$200.9K$2.02KAdded$190.6K
Ensign Peak Advisors, Inc6.37K$200.7K$32.8KAdded$32.8K
ASSETMARK, INC6.34K$199.8K$29KAdded$51.2K
Tower Research Capital LLC (TRC)5.72K$180.2K$16.7KAdded$94.5K
Sterling Capital Management LLC4.13K$130.2K$21.3KCut−$61.9K
Larson Financial Group LLC3.94K$124.2K$31Added$124K
Walleye Trading LLC3.52K$110.8K$18.1KCut−$255.2K
1620 INVESTMENT ADVISORS, INC.3.42K$107.7K$17.6KCut−$13.1K
GAMMA Investing LLC3.37K$106.2K$15.3KAdded$28K
STRS OHIO2.94K$92.8K$15.2KAdded$15.1K
TD Waterhouse Canada Inc.2.46K$81.7K$16.9KAdded$16.9K
NISA INVESTMENT ADVISORS, LLC2.55K$80.4K$13.1KAdded$9.88K
Quantbot Technologies LP2.43K$76.6KNew
OSAIC HOLDINGS, INC.2.38K$75.2K$12.3KCut−$10.8K
Farther Finance Advisors, LLC2.19K$72.8K$14.8KAdded$16.3K
Eurizon Capital SGR S.p.A.2.52K$70.7KNew
BNP PARIBAS ASSET MANAGEMENT Holding S.A.2.18K$68.8KNew
US BANCORP \DE\2.06K$65K$10.3KAdded$12.2K
SBI Securities Co., Ltd.1.83K$57.6K$9.41KCut−$3.1K
Rakuten Securities, Inc.1.8K$56.8K$566Added$53.9K
UMB Bank, n.a.1.77K$55.7K$8.7KAdded$11.1K
Federation des caisses Desjardins du Quebec1.65K$51.9K$8.48KCut−$5.5K
Quent Capital, LLC1.35K$42.4K$5.13KAdded$16.1K
Allworth Financial LP1.34K$42.4K$4.21KAdded$20.8K
LOS ANGELES CAPITAL MANAGEMENT LLC1.25K$39.3K$776Added$20.6K
QUADRANT CAPITAL GROUP LLC1.1K$34.6K$3.36KAdded$17.4K
Parallel Advisors, LLC1.01K$31.8K$3.63KAdded$13.2K
EXCHANGE TRADED CONCEPTS, LLC910$28.7KNew
CoreCap Advisors, LLC900$28.4K$4.64KAdded$4.63K
Hurley Capital, LLC756$23.8K$3.11KAdded$7.93K
SIGNATUREFD, LLC694$21.9K$3.36KAdded$4.66K
GW&K Investment Management, LLC659.6K$20.8K$3.4KAdded$3.15K
Kemnay Advisory Services Inc.634$20KNew
ROTHSCHILD INVESTMENT LLC578$18.2K$2.98KAdded$2.98K
T. Rowe Price Investment Management, Inc.561.3K$17.7K$1.8KAdded$8.48K
EverSource Wealth Advisors, LLC552$17.4K$2.84KAdded$2.87K
Parkside Financial Bank & Trust547$17.2K$1.37KAdded$10.2K
LORD, ABBETT & CO. LLC530.5K$16.7KNew
Global X Japan Co., Ltd.492$15.5K$1.62KAdded$7.2K
MAI Capital Management429$13.5K$360Added$11.7K
Advisory Services Network, LLC394$12.4KNew
Activest Wealth Management385$12.1K$1.98KAdded$1.98K
HARBOUR INVESTMENTS, INC.306$9.65KNew
HRT FINANCIAL LP261.8K$8.25K$465Added$5.87K
Spire Wealth Management233$7.35K$1.2KAdded$1.2K
HUNTINGTON NATIONAL BANK231$7.28K$1.19KAdded$1.19K
MassMutual Private Wealth & Trust, FSB196$6.18K$1.01KAdded$1.01K
Smartleaf Asset Management LLC220$6.17K$266Added$186
Sunbelt Securities, Inc.185$5.83K$953Added$953
Truvestments Capital LLC154$4.86K$793Added$793

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.