Allegro MicroSystems, Inc.
MX ˙ BMV ˙ US01749D1054
SecurityMX:ALGM / Allegro MicroSystems, Inc.
InstitutionRaymond James Financial Inc
Latest Disclosed Ownership995,753 shares
Latest Disclosed Value $ 31,396,089
Raymond James Financial Inc reports 9.61% increase in ownership of ALGM / Allegro MicroSystems, Inc.

On May 14, 2026 - Raymond James Financial Inc filed a 13F-HR form disclosing ownership of 995,753 shares of Allegro MicroSystems, Inc. (MX:ALGM) valued at $31,396,089 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 908,441 shares of Allegro MicroSystems, Inc.. This represents a change in shares of 9.61% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 995,753 87,312 9.61 31,396 31.01 0.0097
2026-02-17 2025-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 908,441 -17,917 -1.93 23,965 -11.41 0.0075
2025-11-14 2025-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 926,358 -328,824 -26.20 27,050 -36.97 0.0087
2025-08-14 2025-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,255,182 261,842 26.36 42,915 71.92 0.0148
2025-05-13 2025-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 993,340 300,505 43.37 24,963 64.82 0.0094
2025-04-23 2024-12-31 13F/A-2 ALLEGRO MICROSYSTEMS COM 01749D105 692,835 692,835 15,145 0.0056
2025-02-13 2024-12-31 13F/A-1 ALLEGRO MICROSYSTEMS COM 01749D105 692,835 692,835 15,145 0.0056
2025-02-06 2024-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 692,835 692,835 15,145 0.0056
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.