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ALGM — ALLEGRO MICROSYSTEMS INC

Reported value held$7.08B
Funds holding (latest)48
SectorTechnology
Funds holding (Q2 2026)34
Institutional value$6.64B · 99.68M sh
New / Add / Cut / Exit2 / 18 / 12 / 4
Top-5 / Top-10 concentration81.0% / 90.4%
Institutional holdings change Accumulating +28.3% (+21.97M sh)
Institutional value change Up +171.5%

As of Q2 2026, 34 SEC-registered investment managers reported holding ALGM (ALLEGRO MICROSYSTEMS INC) in their latest 13F filings, with a combined reported value of $6.64B across 99.68M shares. That is +28.3% by share count (+21.97M shares) versus the previous quarter, while reported value moved +171.5%. Ownership is concentrated: the five largest holders account for 81.0% of reported value and the top ten for 90.4%.

Compared with the prior quarter, 2 opened new positions, 18 added to existing stakes, 12 trimmed, 4 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

ALGM is classified in the Technology sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
Fidelity Management & Research (FMR) history Q2 2026 25.58M $1.78B 0.09% Reduce
BlackRock Inc history Q2 2026 13.89M $966.97M 0.01% Add
Invesco Ltd history Q2 2026 13.68M $952.29M 0.08% Add
JPMorgan Chase & Co history Q2 2026 12.72M $844.87M 0.10% New
Capital Research Global Investors history Q2 2026 12.01M $835.89M 0.12% Reduce
Vanguard Group history Q4 2025 14.20M $374.66M 0.01% Reduce
Geode Capital Management history Q2 2026 2.64M $184.18M 0.01% Add
Morgan Stanley history Q2 2026 1.81M $125.97M 0.01% Reduce
Goldman Sachs Group history Q2 2026 1.58M $109.66M 0.01% Add
Principal Global Investors history Q2 2026 1.49M $103.72M 0.05% Reduce
MFS Investment Management history Q2 2026 1.44M $100.49M 0.03% Add
Charles Schwab Investment Management history Q2 2026 1.36M $94.72M 0.01% Reduce
Norges Bank Investment Management history Q2 2026 1.29M $90.15M 0.01% Reduce
Northern Trust Corp history Q2 2026 1.17M $81.26M 0.01% Add
Bank of America Corp history Q2 2026 921.73K $64.17M 0.00% Add
Wellington Management Group history Q2 2026 814.94K $56.74M 0.01% Add
UBS Group AG history Q2 2026 780.95K $54.37M 0.01% Add
BNY Mellon history Q2 2026 716.95K $49.91M 0.01% Reduce
AQR Capital Management history Q2 2026 493.75K $33.42M 0.01% Add
Point72 Asset Management history Q4 2025 1.15M $30.34M 0.04% Add

View all 48 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
Fidelity Management & Research (FMR) 89.60K 3.84M 4.68M 3.55M 3.50M 5.62M 8.06M 8.11M 9.23M 10.45M 17.54M 19.72M 28.25M 22.77M 26.92M 27.25M 27.47M 23.64M 27.42M 25.58M
BlackRock Inc — — — — — — — — — — — — 12.84M 11.76M 11.67M 11.79M 11.38M 12.20M 12.49M 13.89M
Invesco Ltd 3.80M 3.98M 4.15M 3.30M 3.35M 3.91M 4.63M 2.86M 3.21M 4.15M 4.08M 5.92M 3.26M 2.09M 4.84M 6.25M 5.31M 7.65M 8.75M 13.68M
JPMorgan Chase & Co 3.30M 3.59M 3.89M 3.97M 4.12M 3.04M 3.02M 3.32M 4.05M 4.49M 5.65M 9.14M 11.02M 10.53M 9.00M 8.01M 7.73M 7.35M — 12.72M
Capital Research Global Investors — — — — — — — — — — — — 5.41M 5.77M 11.06M 15.90M 16.82M 13.11M 12.44M 12.01M
Geode Capital Management 776.83K 892.15K 824.57K 937.78K 1.12M 1.15M 1.07M 1.14M 1.26M 1.31M 1.35M 1.37M 2.56M 2.36M 2.39M 2.41M 2.37M 2.39M 2.46M 2.64M
Morgan Stanley 589.50K 712.84K 389.10K 615.58K 664.41K 617.67K 867.85K 1.32M 1.09M 1.14M 3.51M 2.08M 2.04M 2.66M 2.65M 2.08M 1.94M 2.23M 2.28M 1.81M
Goldman Sachs Group 1.52M 1.48M 1.74M 1.65M 1.59M 1.45M 1.25M 1.08M 1.05M 978.90K 902.36K 1.15M 229.31K 212.01K 189.91K 237.56K 345.35K 796.33K 1.44M 1.58M
Principal Global Investors 1.78M 1.80M 1.95M 2.44M 2.43M 2.74M 2.57M 2.43M 2.13M 2.13M 2.18M 2.19M 2.50M 2.27M 2.42M 2.16M 1.91M 1.74M 1.79M 1.49M
MFS Investment Management — — — — — — 390.54K 1.07M 1.06M 1.08M 958.80K 984.30K 1.45M 1.07M 610.17K 513.04K 40.39K 80.16K 69.30K 1.44M
Charles Schwab Investment Management 414.51K 424.45K 436.69K 432.95K 541.52K 561.25K 561.90K 564.45K 635.26K 651.79K 683.75K 677.77K 1.37M 1.14M 1.17M 1.24M 1.29M 1.36M 1.39M 1.36M
Norges Bank Investment Management — — — — — 638.70K — — — 521.67K — 787.64K — 1.23M — 1.41M — 1.46M — 1.29M
Northern Trust Corp 213.01K 220.78K 216.79K 226.22K 276.79K 476.96K 509.11K 489.13K 523.40K 521.77K 458.48K 521.12K 945.71K 1.07M 1.09M 1.06M 1.01M 1.01M 1.05M 1.17M
Bank of America Corp 347.42K 351.53K 381.37K 904.45K 403.23K 289.82K 523.67K 320.56K 1.37M 1.11M 572.80K 500.40K 647.92K 339.45K 3.42M 3.52M 952.68K 576.65K 855.45K 921.73K
Wellington Management Group — — 1.39M 1.55M 1.50M 1.24M — — — — — — 3.06M 3.99M 3.25M 2.64M 1.16M 1.11M 673.10K 814.94K
UBS Group AG 7.93K 15.06K 14.38K 626 500 39.47K 40.02K 47.70K 28.28K 1.08K 660.12K 313.43K 456.42K 1.51M 1.53M 713.54K 633.18K 328.20K 435.38K 780.95K
BNY Mellon 187.17K 183.02K 175.50K 186.84K 398.85K 714.58K 676.95K 637.18K 789.28K 701.55K 677.99K 805.08K 1.18M 1.06M 996.57K 1.04M 793.51K 750.59K 743.29K 716.95K
AQR Capital Management — — 201.05K 233.51K 204.56K 118.64K 203.45K 381.88K 304.71K 350.75K 93.70K 39.05K — — 13.76K 20.73K 250.38K 327.97K 345.13K 493.75K
Two Sigma Investments 23.70K — — 24.00K — — 244.41K 894.19K 516.69K 418.26K 488.93K 865.60K 1.38M 1.43M 108.99K 346.81K 161.35K 310.93K 639.84K 347.29K
Balyasny Asset Management 329.47K 131.59K — — 207.99K 88.91K 249.21K 19.44K 28.42K — 1.16M 168.51K 653.70K 567.12K 2.60M 1.47M 498.33K 810.46K 245.91K 267.28K

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