Allegro MicroSystems, Inc.
MX ˙ BMV ˙ US01749D1054
SecurityMX:ALGM / Allegro MicroSystems, Inc.
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership1,790,466 shares
Latest Disclosed Value $ 56,453,393
Principal Financial Group Inc reports 2.76% increase in ownership of ALGM / Allegro MicroSystems, Inc.

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 1,790,466 shares of Allegro MicroSystems, Inc. (MX:ALGM) valued at $56,453,393 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,742,296 shares of Allegro MicroSystems, Inc.. This represents a change in shares of 2.76% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-04 2026-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,790,466 48,170 2.76 56,453 22.83 0.0154
2026-02-02 2025-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,742,296 -171,778 -8.97 45,962 -17.77 0.0235
2025-11-04 2025-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,914,074 -243,263 -11.28 55,891 -24.23 0.0282
2025-08-08 2025-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,157,337 -258,765 -10.71 73,759 21.48 0.0390
2025-04-28 2025-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,416,102 144,824 6.38 60,717 22.29 0.0341
2025-01-31 2024-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,271,278 -228,482 -9.14 49,651 -14.75 0.0271
2024-10-31 2024-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,499,760 308,943 14.10 58,244 -5.86 0.0321
2024-07-29 2024-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,190,817 11,230 0.52 61,869 5.29 0.0367
2024-04-29 2024-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,179,587 44,641 2.09 58,762 -9.07 0.0345
2024-02-07 2023-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,134,946 7,993 0.38 64,625 -4.87 0.0412
2023-11-02 2023-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,126,953 -300,331 -12.37 67,935 -38.00 0.0488
2023-08-07 2023-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,427,284 -146,320 -5.69 109,568 -11.29 0.0749
2023-05-09 2023-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,573,604 -162,107 -5.93 123,507 50.39 0.0883
2023-02-09 2022-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,735,711 304,560 12.53 82,126 54.60 0.0618
2022-11-09 2022-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,431,151 -7,530 -0.31 53,121 5.28 0.0422
2022-08-10 2022-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 2,438,681 484,197 24.77 50,456 -9.10 0.0373
2022-05-09 2022-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,954,484 149,498 8.28 55,507 -15.00 0.0220
2022-02-09 2021-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,804,986 23,104 1.30 65,305 14.67 0.0390
2021-11-09 2021-09-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,781,882 56,275 3.26 56,949 19.14 0.0371
2021-08-10 2021-06-30 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,725,607 340,911 24.62 47,799 36.17 0.0309
2021-05-10 2021-03-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,384,696 325,894 30.78 35,102 24.35 0.0248
2021-02-23 2020-12-31 13F/A-1 ALLEGRO MICROSYSTEMS COM 01749D105 1,058,802 1,058,802 28,228 0.0209
2021-02-08 2020-12-31 13F ALLEGRO MICROSYSTEMS COM 01749D105 1,058,802 1,058,802 28,228 0.0194
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.