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Allegro Microsystems, Inc. 13F holders

Of the 44 funds followed here, 6 reported a position in Allegro Microsystems, Inc. in a 13F for the quarter ended 30 June 2026. The largest: FMR LLC, 25.6 million shares worth $1.78 billion, 0.1% of its reported book. Sold out: Renaissance Technologies, Millennium Management, Bridgewater Associates.

FundSharesValueOf its bookChange on the quarterStatusQuarter endedFiling
FMR LLC25,581,021$1.78 billion0.1%-1,840,185trimmed30 June 202613F
Capital Research Global Investors12,006,396$835.9 million0.1%-429,162trimmed30 June 202613F
Geode Capital Management2,644,929$184.2 million0.0%+188,109added30 June 202613F
Norges Bank1,294,958$90.2 million0.0%held30 June 202613F
Two Sigma Investments347,294$24.2 million0.0%-292,547trimmed30 June 202613F
Citadel Advisors196,100$13.7 million0.0%-270,844trimmed30 June 202613F
Renaissance Technologies0$00.0%-123,900exited30 June 202613F
Millennium Management0$00.0%-28,127exited30 June 202613F
Bridgewater Associates0$00.0%-16,645exited30 June 202613F
Value is what the fund reported.
Read moreChange is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.

Schedule 13D and 13G filed on the name, last twelve months

FiledScheduleWhoHoldingOf the classEvent dateRule or purposeFiling
7 October 202613G/AFmr Llc and 3 others9.9 million5.3%30 September 2026passive, institutional (13d-1(b))EDGAR
13 August 202613GInvesco Ltd. and 1 other13.7 million7.3%30 June 2026passive, institutional (13d-1(b))EDGAR
6 August 202613G/AFmr Llc and 3 others25.6 million13.7%30 June 2026passive, institutional (13d-1(b))EDGAR
27 July 202613G/ABlackRock, Inc. and 1 other12.8 million6.9%30 June 2026passive, institutional (13d-1(b))EDGAR
16 July 202613GJpmorgan Chase & Co and 1 other12.7 million6.8%30 June 2026passive, institutional (13d-1(b))EDGAR
6 May 202613G/AFmr Llc and 3 others27.4 million14.8%31 March 2026passive, institutional (13d-1(b))EDGAR
26 March 202613G/AThe Vanguard Group and 1 other00.0%13 March 2026passive, institutional (13d-1(b))EDGAR
12 February 202613G/ACapital Research Global Investors and 1 other13.1 million7.1%31 December 2025passive, institutional (13d-1(b))EDGAR
5 February 202613G/AFmr Llc and 3 others23.6 million12.8%31 December 2025passive, institutional (13d-1(b))EDGAR
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read moreAmendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.

Fails to deliver

Settlement dateShares failedPriceFile
14 September 20267,097$36.31SEC
3 September 2026102$35.47SEC
2 September 202621,600$35.47SEC
28 August 20261,919$37.59SEC
27 August 202659$36.89SEC
25 August 202637$35.63SEC
24 August 20264,298$37.16SEC
19 August 2026167,420$39.39SEC
18 August 2026101$44.25SEC
17 August 20262,103$44.39SEC
12 August 202610,252$42.52SEC
11 August 2026133$42.46SEC
6 August 20265,926$41.80SEC
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
Read moreLargest in the window: 167,420 on 19 August 2026. A fail is an operational fact about settlement, not a position.

Source

Each fund's 13F-HR on EDGAR, linked per row; positions matched to ALGM by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.

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