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Disclosery

ALGM ALLEGRO MICROSYSTEMS INC

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COM (common), issuer CIK 866291

313 managers (322 13F filers) reported a position in ALGM shares at 2026-03-31, 138,349,065 shares in all. 61 filers opened a position and 37 filers sold out during the quarter.

Managers
313
13F filers
322
New
61
Added
126
Reduced
86
Sold out
37
Shares held by filers
138,349,065

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…8,007$252K<0.01%new13F-HRTimelineGroup
SEB Asset Management AB7,798$246K<0.01%13F-HRTimeline
ELEVATION POINT WEALTH PARTNERS, LLC7,690$242K0.01%new13F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.7,652$241K<0.01%new13F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…7,635$241K<0.01%013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC7,395$233K<0.01%-76513F-HRTimelineGroup
DNB Asset Management ASin group DNB Asset Management AS6,923$218K<0.01%new13F-HRTimelineGroup
SIH Partners, LLLPin group SIH Partners, LLLP6,872$217K0.01%new13F-HRTimelineGroup
Machina Capital S.A.S.6,847$216K0.04%new13F-HRTimeline
Maryland State Retirement & Pension Sys…6,797$214K<0.01%new13F-HRTimeline
ALGERT GLOBAL LLC6,740$213K<0.01%new13F-HR/ATimeline
Claret Asset Management Corp6,695$211K0.03%new13F-HRTimeline
Headlands Technologies LLC6,685$211K0.02%new13F-HRTimeline
PRAXIS INVESTMENT MANAGEMENT INC6,590$208K0.01%new13F-HRTimeline
Utah Retirement Systems6,505$205K<0.01%new13F-HRTimeline
Freestone Grove Partners LP6,433$203K<0.01%new13F-HRTimeline
Arax Advisory Partners6,373$201K0.01%+5,98013F-HRTimeline
Ensign Peak Advisors, Inc6,366$201K<0.01%013F-HR/ATimeline
ASSETMARK, INCin group ASSETMARK, INC6,338$200K<0.01%+70513F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…5,716$180K<0.01%+2,46613F-HRTimelineGroup
SG Americas Securities, LLC5,245$165K<0.01%-9,50913F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.4,718$149K<0.01%+1,05113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
KBC Group NVin group KBC Group NV4,581$144K<0.01%+88713F-HRTimelineGroup
Sterling Capital Management LLC4,129$130K<0.01%-3,15213F-HRTimeline
Larson Financial Group LLC3,939$124K<0.01%+3,93313F-HRTimeline
1620 INVESTMENT ADVISORS, INC.3,415$108K0.07%-1,16313F-HRTimeline
GAMMA Investing LLC3,368$106K<0.01%+40513F-HRTimeline
STRS OHIO2,944$92.8K<0.01%-413F-HRTimeline
TD Waterhouse Canada Inc.2,459$81.7K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC2,549$80.4K<0.01%-12313F-HRTimeline
Quantbot Technologies LP2,430$76.6K<0.01%new13F-HRTimeline
NewEdge Advisors, LLC2,414$76.1K<0.01%+1313F-HR/ATimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.2,385$75.2K<0.01%-87613F-HRTimelineGroup
Farther Finance Advisors, LLC2,185$72.8K<0.01%+4313F-HRTimeline
Eurizon Capital SGR S.p.A.2,523$70.7K<0.01%new13F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …2,182$68.8K<0.01%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\2,063$65K<0.01%+5813F-HRTimelineGroup
SBI Securities Co., Ltd.1,827$57.6K<0.01%-47413F-HRTimeline
Rakuten Securities, Inc.in group Rakuten Group, Inc.1,802$56.8K0.02%+1,69213F-HRTimelineGroup
UMB Bank, n.a.1,766$55.7K<0.01%+7613F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Federation des caisses Desjardins du Qu…1,646$51.9K<0.01%-53013F-HRTimeline
Quent Capital, LLC1,346$42.4K<0.01%+34913F-HRTimeline
Allworth Financial LP1,345$42.4K<0.01%+52713F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC1,246$39.3K<0.01%+63013F-HRTimeline
QUADRANT CAPITAL GROUP LLC1,097$34.6K<0.01%+44413F-HR/ATimeline
Parallel Advisors, LLC1,008$31.8K<0.01%+30213F-HR/ATimeline
EXCHANGE TRADED CONCEPTS, LLC910$28.7K<0.01%new13F-HRTimeline
CoreCap Advisors, LLC900$28.4K<0.01%013F-HRTimeline
Hurley Capital, LLC756$23.8K0.01%+15313F-HRTimeline
SIGNATUREFD, LLC694$21.9K<0.01%+4113F-HRTimeline
Kemnay Advisory Services Inc.634$20K<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC578$18.2K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…552$17.4K<0.01%+113F-HR/ATimelineGroup
Parkside Financial Bank & Trust547$17.2K<0.01%+28113F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC509$16K<0.01%+15213F-HRTimelineGroup
Global X Japan Co., Ltd.492$15.5K<0.01%+17713F-HRTimeline
MAI Capital Management429$13.5K<0.01%+35913F-HRTimeline
Advisory Services Network, LLC394$12.4K<0.01%new13F-HRTimeline
Activest Wealth Management385$12.1K<0.01%013F-HRTimeline
Covestor Ltd319$10K0.01%-14113F-HRTimeline
HARBOUR INVESTMENTS, INC.306$9.65K<0.01%new13F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management233$7.35K<0.01%013F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK231$7.28K<0.01%013F-HRTimelineGroup
MassMutual Private Wealth & Trust, FSB196$6.18K<0.01%013F-HRTimeline
Smartleaf Asset Management LLC220$6.17K<0.01%-313F-HRTimeline
Sunbelt Securities, Inc.185$5.83K<0.01%013F-HRTimeline
Truvestments Capital LLC154$4.86K<0.01%013F-HRTimeline
SIMPLEX TRADING, LLC154$4.86K<0.01%new13F-HRTimeline
TWIN PEAKS WEALTH ADVISORS, LLC149$4.7K<0.01%new13F-HRTimeline
Owl Creek Wealth Partners LLC145$4.57K<0.01%13F-HRTimeline
Versant Capital Management, Inc140$4.41K<0.01%+13313F-HRTimeline
SJS Investment Consulting Inc.137$4.32K<0.01%013F-HRTimeline
Hilton Head Capital Partners, LLC125$3.94K<0.01%013F-HRTimeline
Essential Partners LLC123$3.88K<0.01%013F-HRTimeline
LRI Investments, LLC109$3.44K<0.01%new13F-HRTimeline
Bell Investment Advisors, Inc101$3.19K<0.01%013F-HRTimeline
Root Financial Partners, LLC98$3.09K<0.01%+5613F-HRTimeline
Investors Research Corp93$2.93K<0.01%new13F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…85$2.68K<0.01%013F-HRTimelineGroup
WHITTIER TRUST CO OF NEVADA INC75$2.46K<0.01%013F-HRTimeline
Pinnacle Wealth Planning Services, Inc.62$1.96K<0.01%+513F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…55$1.73K<0.01%+1413F-HRTimeline
ATLAS CAPITAL ADVISORS INC.54$1.7K<0.01%new13F-HRTimeline
Keating Financial Advisory Services, In…52$1.64K<0.01%+1513F-HRTimeline
MCF Advisors LLC50$1.58K<0.01%new13F-HRTimeline
Blue Trust, Inc.46$1.45K<0.01%013F-HRTimeline
Rossby Financial, LCC38$1.26K<0.01%+1513F-HRTimeline
TOTH FINANCIAL ADVISORY CORP40$1.26K<0.01%new13F-HRTimeline
Kilter Group LLC40$1.26K<0.01%-2113F-HRTimeline
Golden State Wealth Management, LLC36$1.14K<0.01%013F-HRTimeline
SHP Wealth Management36$1.14K<0.01%+2413F-HRTimeline
Clearstead Advisors, LLC33$1.04K<0.01%-35513F-HRTimeline
North Star Investment Management Corp.33$1.04K<0.01%new13F-HRTimeline
Copia Wealth Management27$851<0.01%013F-HRTimeline
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…26$819<0.01%+2013F-HRTimelineGroup
Cornerstone Planning Group LLC15$746<0.01%013F-HRTimeline
Bogart Wealth, LLC23$725<0.01%013F-HRTimeline
Cromwell Holdings LLC19$599<0.01%013F-HRTimeline
Principia Wealth Advisory, LLC17$536<0.01%+813F-HRTimeline
ATWOOD & PALMER INC15$473<0.01%new13F-HRTimeline
MV CAPITAL MANAGEMENT, INC.14$442<0.01%013F-HRTimeline
Basecamp Wealth Advisors LLC14$441<0.01%new13F-HRTimeline
KAYNE ANDERSON RUDNICK INVESTMENT MANAG…9$284<0.01%013F-HRTimeline
IMA Advisory Services, Inc.8$252<0.01%013F-HRTimeline
IFP Advisors, Inc8$252<0.01%-4613F-HRTimeline
Rachor Investment Advisory Services, LLC7$221<0.01%new13F-HRTimeline
CREATIVE FINANCIAL DESIGNS INC /ADV5$158<0.01%013F-HRTimeline
Atlantic Union Bankshares Corpin group Atlantic Union Bankshares Corp5$158<0.01%013F-HRTimelineGroup
Dunhill Financial, LLC2$85<0.01%-113F-HRTimeline
Quaker Wealth Management, LLC2$64<0.01%new13F-HRTimeline
Wealth Enhancement Trust Services, Inc.2$63<0.01%013F-HRTimeline
TFC Financial Management, Inc.1$32<0.01%013F-HRTimeline
Avion Wealth17$00%013F-HRTimelineValue filed as zero, left out of ratios.

Events

  • FMR LLC and 1 other reporting person reported 9,913,112 ALGM shares, 5.3% of the class, as of 2026-09-30, in a 13G/A filed 2026-10-07. 0000315066-26-002338

    Accepted , ingested