United States Semiconductors & Semiconductor Equipment

Allegro Microsystems Inc (ALGM)

Track

Over the past 90 days, Allegro Microsystems Inc. insiders have engaged in 13 transactions, all of which were sales, totaling approximately $3.42 million in net value. Key executives, including the CEO, have offloaded shares following the company's recent earnings report, which showed a 6.25% EPS beat. No insider purchases were recorded during this period.
Ticker: ALGM Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Top insiders
Trades
Madormo Richard
SVP, Worldwide Sales
2 sales — total 527,201 USD
Sale 3 Jun 2026
Value US$3,966,691.11 | Price 381.56 | Shares 27,126
Proposed sale 3 Jun 2026
Value US$245,594.59 | Price 350.75 | Shares 11,012
Sale 22 May 2026
Value US$284,375.25 | Price 104.67 | Shares 17,269
Proposed sale 22 May 2026
Value US$4,614,180.33 | Price 451.61 | Shares 78,415
Sale 21 May 2026
Value US$234,165.04 | Price 44.89 | Shares 5,217
Sale 18 May 2026
Value US$109,801.52 | Price 41.56 | Shares 2,642
Proposed sale 18 May 2026
Value US$109,801.52 | Price 41.56 | Shares 2,642
Sale 14 May 2026
Value US$759,625.24 | Price 45.46 | Shares 16,711
Proposed sale 14 May 2026
Value US$759,624.79 | Price 45.46 | Shares 16,711
Sale 11 May 2026
Value US$425,379.87 | Price 47.54 | Shares 8,948
Proposed sale 11 May 2026
Value US$425,380.00 | Price 47.54 | Shares 8,948
Sale 11 May 2026
Value US$1,421,250.91 | Price 47.23 | Shares 30,089
Proposed sale 11 May 2026
Value US$1,421,251.25 | Price 47.23 | Shares 30,089
Planned sale 2 Mar 2026
Value US$340,445.00 | Price 35.00 | Shares 9,727
Proposed sale 2 Mar 2026
Value US$340,445.00 | Price 35.00 | Shares 9,727
Sale 2 Mar 2026
Value US$90,930.00 | Price 35.00 | Shares 2,598
Proposed sale 2 Mar 2026
Value US$90,930.00 | Price 35.00 | Shares 2,598
Planned sale 17 Feb 2026
Value US$384,762.48 | Price 41.56 | Shares 9,258
Proposed sale 17 Feb 2026
Value US$384,762.48 | Price 41.56 | Shares 9,258
Planned sale 10 Dec 2025
Value US$836,190.00 | Price 30.00 | Shares 27,873
Proposed sale 10 Dec 2025
Value US$836,190.00 | Price 30.00 | Shares 27,873
Sale 22 Aug 2025
Value US$271,192.58 | Price 32.81 | Shares 8,266
Sale 12 Aug 2025
Value US$222,672.80 | Price 31.81 | Shares 7,000
Proposed sale 12 Aug 2025
Value US$222,672.93 | Price 31.81 | Shares 7,000
Sale 4 Aug 2025
Value US$157,240.74 | Price 31.18 | Shares 5,043
Proposed sale 4 Aug 2025
Value US$157,240.74 | Price 31.18 | Shares 5,043
Sale 11 Jun 2025
Value US$94,395.00 | Price 30.45 | Shares 3,100
Proposed sale 11 Jun 2025
Value US$94,395.00 | Price 30.45 | Shares 3,100
Sale 4 Jun 2025
Value US$189,035.82 | Price 27.60 | Shares 6,849
Proposed sale 4 Jun 2025
Value US$186,635.23 | Price 27.25 | Shares 6,849
Buy 18 Nov 2024
Value US$285,000.00 | Price 19.00 | Shares 15,000
Buy 5 Nov 2024
Value US$3,974.00 | Price 19.87 | Shares 200
Buy 5 Nov 2024
Value US$95,472.00 | Price 19.89 | Shares 4,800
Sale 7 Aug 2024
Value US$232,001,015.40 | Price 23.16 | Shares 10,017,315
Sale 29 Jul 2024
Value US$665,850,000.00 | Price 23.16 | Shares 28,750,000
Proposed sale 11 Jun 2024
Value US$123,236,709.00 | Price 28.90 | Shares 4,264,246
Sale 30 May 2024
Value US$255,000.00 | Price 30.00 | Shares 8,500
Proposed sale 30 May 2024
Value US$255,000.00 | Price 30.00 | Shares 8,500
Planned sale 8 Mar 2024
Value US$476,485.50 | Price 31.77 | Shares 15,000
Proposed sale 8 Mar 2024
Value US$472,500.00 | Price 31.50 | Shares 15,000
Proposed sale 4 Mar 2024
Value US$78,750,000.00 | Price 31.50 | Shares 2,500,000
Proposed sale 27 Feb 2024
Value US$93,000,000.00 | Price 31.00 | Shares 3,000,000
Proposed sale 15 Feb 2024
Value US$86,925,000.00 | Price 30.50 | Shares 2,850,000
Buy 17 Nov 2023
Value US$27,840.00 | Price 27.84 | Shares 1,000
Buy 14 Nov 2023
Value US$9,579.50 | Price 27.37 | Shares 350
Buy 15 Sep 2023
Value US$50,041.44 | Price 33.63 | Shares 1,488
Proposed sale 6 Sep 2023
Value US$189,300,000.00 | Price 37.86 | Shares 5,000,000
Sale 23 Aug 2023
Value US$658,376.00 | Price 38.73 | Shares 17,000
Proposed sale 23 Aug 2023
Value US$653,206.49 | Price 38.42 | Shares 17,000
Buy 16 Aug 2023
Value US$193,349.50 | Price 38.67 | Shares 5,000
Sale 8 Feb 2023
Value US$255,480.00 | Price 42.58 | Shares 6,000
Buy 3 Feb 2023
Value US$9,967.20 | Price 41.53 | Shares 240
Planned sale 2 Feb 2023
Value US$1,605,148.00 | Price 40.13 | Shares 40,000
Sale 2 Feb 2023
Value US$188,044,800.00 | Price 37.76 | Shares 4,980,000
Planned sale 17 Jan 2023
Value US$855,340.00 | Price 34.21 | Shares 25,000
Planned sale 11 Jan 2023
Value US$480,936.00 | Price 32.06 | Shares 15,000
Planned sale 6 Jan 2023
Value US$41,314.96 | Price 30.00 | Shares 1,377
Planned sale 4 Jan 2023
Value US$33,767.71 | Price 30.07 | Shares 1,123
Planned sale 3 Jan 2023
Value US$75,683.50 | Price 30.27 | Shares 2,500
Planned sale 30 Dec 2022
Value US$150,046.00 | Price 30.01 | Shares 5,000
Planned sale 5 Dec 2022
Value US$2,484,697.50 | Price 33.13 | Shares 75,000
Planned sale 1 Dec 2022
Value US$232,486.50 | Price 31.00 | Shares 7,500
Planned sale 15 Nov 2022
Value US$710,070.57 | Price 29.25 | Shares 24,276
Planned sale 14 Nov 2022
Value US$260,528.69 | Price 28.76 | Shares 9,059
Planned sale 11 Nov 2022
Value US$768,285.31 | Price 28.81 | Shares 26,665
Sale 4 Nov 2022
Value US$423,769.35 | Price 25.92 | Shares 16,349
Sale 23 May 2022
Value US$200,079.26 | Price 24.17 | Shares 8,278
Planned sale 18 Mar 2022
Value US$217,800.00 | Price 29.04 | Shares 7,500
Planned sale 21 Dec 2021
Value US$1,671,000.00 | Price 33.42 | Shares 50,000
Planned sale 7 Dec 2021
Value US$2,544,000.00 | Price 33.92 | Shares 75,000
Sale 23 Nov 2021
Value US$397,930.00 | Price 30.61 | Shares 13,000
Planned sale 23 Nov 2021
Value US$1,537,500.00 | Price 30.75 | Shares 50,000
Planned sale 19 Nov 2021
Value US$68,471.59 | Price 32.59 | Shares 2,101
Planned sale 19 Nov 2021
Value US$69,481.88 | Price 32.59 | Shares 2,132
Planned sale 19 Nov 2021
Value US$57,130.27 | Price 32.59 | Shares 1,753
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-04 2026-06-03 S Sale
Madormo Richard

SVP, Worldwide Sales

Officer
27,126 -38.6%
381.56
US$3,966,691 		27,126 -38.6% 381.56 US$3,966,691
2026-06-03 2026-06-03 PrS Proposed sale
Madormo Richard

Officer

Officer
11,012
350.75
US$245,595 		11,012 350.75 US$245,595
2026-05-26 2026-05-22 S Sale
Coleman Troy

SVP, General Manager, Products

Officer
17,269 -4.9%
104.67
US$284,375 		17,269 -4.9% 104.67 US$284,375
2026-05-22 2026-05-22 PrS Proposed sale
Coleman Troy

Officer

Officer
4,500
45.72
US$205,740 		4,500 45.72 US$205,740
2026-05-22 2026-05-21 S Sale
2.7
Webster Roald Graham

VP, Chief Accounting Officer

Officer
5,217 -28.5%
44.89
US$234,165 		5,217 -28.5% 44.89 US$234,165
2026-05-19 2026-05-18 S Sale
1.1
Kent Ian

SVP, Global Operations

Officer
2,642 -9.4%
41.56
US$109,802 		2,642 -9.4% 41.56 US$109,802
2026-05-18 2026-05-18 PrS Proposed sale
1.1
Kent Ian

Officer

Officer
2,642
41.56
US$109,802 		2,642 41.56 US$109,802
2026-05-15 2026-05-14 S Sale
2.6
Lynch Susan D
Non-Executive Director
16,711 -56.6%
45.46
US$759,625 		16,711 -56.6% 45.46 US$759,625
2026-05-14 2026-05-14 PrS Proposed sale
2.6
Lynch Susan D

Director

Non-Executive Director
16,711
45.46
US$759,625 		16,711 45.46 US$759,625
2026-05-13 2026-05-11 S Sale
Briansky Sharon

SVP, GC and Secretary

Officer
8,948 -10.6%
47.54
US$425,380 		8,948 -10.6% 47.54 US$425,380
2026-05-13 2026-05-11 S Sale
3.4
Doogue Michael

President and CEO

Executive Director
30,089 -10.6%
47.23
US$1,421,251 		30,089 -10.6% 47.23 US$1,421,251
2026-05-11 2026-05-11 PrS Proposed sale
3.4
Doogue Michael

Officer; Director

Executive Director
30,089
47.23
US$1,421,251 		30,089 47.23 US$1,421,251
2026-05-11 2026-05-11 PrS Proposed sale
Briansky Sharon

Officer

Officer
8,948
47.54
US$425,380 		8,948 47.54 US$425,380
2026-03-03 2026-03-02 PlS Planned sale
Briansky Sharon

SVP, GC and Secretary

Officer
9,727 -10.4%
35.00
US$340,445 		9,727 -10.4% 35.00 US$340,445
2026-03-03 2026-03-02 S Sale
2.4
Hagen Erin

SVP, CHRO

Officer
2,598 -7.9%
35.00
US$90,930 		2,598 -7.9% 35.00 US$90,930
2026-03-02 2026-03-02 PrS Proposed sale
Briansky Sharon

Officer

Officer
9,727
35.00
US$340,445 		9,727 35.00 US$340,445
2026-03-02 2026-03-02 PrS Proposed sale
2.4
Hagen Erin

Officer

Officer
2,598
35.00
US$90,930 		2,598 35.00 US$90,930
2026-02-18 2026-02-17 PlS Planned sale
Briansky Sharon

SVP, GC and Secretary

Officer
9,258 -8.2%
41.56
US$384,762 		9,258 -8.2% 41.56 US$384,762
2026-02-17 2026-02-17 PrS Proposed sale
Briansky Sharon

Officer

Officer
9,258
41.56
US$384,762 		9,258 41.56 US$384,762
2025-12-12 2025-12-10 PlS Planned sale
Briansky Sharon

SVP, GC and Secretary

Officer
27,873 -18.7%
30.00
US$836,190 		27,873 -18.7% 30.00 US$836,190
2025-12-10 2025-12-10 PrS Proposed sale
Briansky Sharon

Officer

Officer
27,873
30.00
US$836,190 		27,873 30.00 US$836,190
2025-08-25 2025-08-22 S Sale
2.7
Webster Roald Graham

VP, Chief Accounting Officer

Officer
8,266 -32.3%
32.81
US$271,193 		8,266 -32.3% 32.81 US$271,193
2025-08-13 2025-08-12 S Sale
3.4
Lury Richard R.
Non-Executive Director
7,000 -27.1%
31.81
US$222,673 		7,000 -27.1% 31.81 US$222,673
2025-08-12 2025-08-12 PrS Proposed sale
3.4
Lury Richard R.

Director

Non-Executive Director
7,000
31.81
US$222,673 		7,000 31.81 US$222,673
2025-08-05 2025-08-04 S Sale
2.4
Hagen Erin

SVP, CHRO

Officer
5,043 -12.7%
31.18
US$157,241 		5,043 -12.7% 31.18 US$157,241
2025-08-04 2025-08-04 PrS Proposed sale
2.4
Hagen Erin

Officer

Officer
5,043
31.18
US$157,241 		5,043 31.18 US$157,241
2025-06-12 2025-06-11 S Sale
3.4
Lury Richard R.
Non-Executive Director
3,100 -13.5%
30.45
US$94,395 		3,100 -13.5% 30.45 US$94,395
2025-06-11 2025-06-11 PrS Proposed sale
3.4
Lury Richard R.

Director

Non-Executive Director
3,100
30.45
US$94,395 		3,100 30.45 US$94,395
2025-06-06 2025-06-04 S Sale
3.4
Lury Richard R.
Non-Executive Director
6,849 -22.9%
27.60
US$189,036 		6,849 -22.9% 27.60 US$189,036
2025-06-04 2025-06-04 PrS Proposed sale
3.4
Richard Lury

Officer

Officer
6,849
27.25
US$186,635 		6,849 27.25 US$186,635
2024-11-19 2024-11-18 B Purchase
3.4
Doogue Michael

SVP, CTO

Officer
15,000 +6.5%
19.00
US$285,000 		15,000 +6.5% 19.00 US$285,000
2024-11-06 2024-11-05 B Purchase
2.6
Nargolwala Vineet A

President and CEO

Executive Director
200 +0.1%
19.87
US$3,974 		200 +0.1% 19.87 US$3,974
2024-11-06 2024-11-05 B Purchase
2.6
Nargolwala Vineet A

President and CEO

Executive Director
4,800 +1.4%
19.89
US$95,472 		4,800 +1.4% 19.89 US$95,472
2024-08-09 2024-08-07 S Sale
2.8
Sanken Electric Co., Ltd.
Large shareholder
10,017,315 -14.4%
23.16
US$232,001,015 		10,017,315 -14.4% 23.16 US$232,001,015
2024-07-31 2024-07-29 S Sale
2.8
Sanken Electric Co., Ltd.
Large shareholder
28,750,000 -29.2%
23.16
US$665,850,000 		28,750,000 -29.2% 23.16 US$665,850,000
2024-06-11 2024-06-11 PrS Proposed sale
3.0
OEP SKNA, L.P.

Stockholder

Large shareholder
4,264,246
28.90
US$123,236,709 		4,264,246 28.90 US$123,236,709
2024-05-31 2024-05-30 S Sale
3.4
Lury Richard R.
Non-Executive Director
8,500 -27.0%
30.00
US$255,000 		8,500 -27.0% 30.00 US$255,000
2024-05-30 2024-05-30 PrS Proposed sale
3.4
Lury Richard R.

Director

Non-Executive Director
8,500
30.00
US$255,000 		8,500 30.00 US$255,000
2024-03-11 2024-03-08 PlS Planned sale
3.0
Glover Max R.

SVP of Worldwide Sales

Officer
15,000 -5.8%
31.77
US$476,486 		15,000 -5.8% 31.77 US$476,486
2024-03-08 2024-03-08 PrS Proposed sale
3.0
Glover Max R.

Officer

Officer
15,000
31.50
US$472,500 		15,000 31.50 US$472,500
2024-03-04 2024-03-04 PrS Proposed sale
3.0
OEP SKNA, L.P.

Stockholder

Large shareholder
2,500,000
31.50
US$78,750,000 		2,500,000 31.50 US$78,750,000
2024-02-27 2024-02-27 PrS Proposed sale
3.0
OEP SKNA, L.P.

Stockholder

Large shareholder
3,000,000
31.00
US$93,000,000 		3,000,000 31.00 US$93,000,000
2024-02-15 2024-02-15 PrS Proposed sale
3.0
OEP SKNA, L.P.

Stockholder

Large shareholder
2,850,000
30.50
US$86,925,000 		2,850,000 30.50 US$86,925,000
2023-11-20 2023-11-17 B Purchase
2.6
Nargolwala Vineet A

President and CEO

Executive Director
1,000 +0.3%
27.84
US$27,840 		1,000 +0.3% 27.84 US$27,840
2023-11-15 2023-11-14 B Purchase
2.6
Lynch Susan D
Non-Executive Director
350 +2.1%
27.37
US$9,580 		350 +2.1% 27.37 US$9,580
2023-09-18 2023-09-15 B Purchase
0.7
D'Antilio Derek

SVP, CFO & Treasurer

Officer
1,488 +1.1%
33.63
US$50,041 		1,488 +1.1% 33.63 US$50,041
2023-09-06 2023-09-06 PrS Proposed sale
3.0
OEP SKNA, L.P.

Stockholder

Large shareholder
5,000,000
37.86
US$189,300,000 		5,000,000 37.86 US$189,300,000
2023-08-24 2023-08-23 S Sale
3.2
MARTIN JOSEPH R
Non-Executive Director
17,000 -43.2%
38.73
US$658,376 		17,000 -43.2% 38.73 US$658,376
2023-08-23 2023-08-23 PrS Proposed sale
3.2
MARTIN JOSEPH R

Affiliate
17,000
38.42
US$653,206 		17,000 38.42 US$653,206
2023-08-17 2023-08-16 B Purchase
2.6
Nargolwala Vineet A

President and CEO

Executive Director
5,000 +1.7%
38.67
US$193,350 		5,000 +1.7% 38.67 US$193,350
2023-02-10 2023-02-08 S Sale
3.4
Lury Richard R.
Non-Executive Director
6,000 -17.8%
42.58
US$255,480 		6,000 -17.8% 42.58 US$255,480
2023-02-06 2023-02-03 B Purchase
2.6
Lynch Susan D
Non-Executive Director
240 +2.0%
41.53
US$9,967 		240 +2.0% 41.53 US$9,967
2023-02-06 2023-02-02 PlS Planned sale
3.0
Glover Max R.

SVP of Worldwide Sales

Officer
40,000 -17.0%
40.13
US$1,605,148 		40,000 -17.0% 40.13 US$1,605,148
2023-02-06 2023-02-02 S Sale
3.0
OEP SKNA, L.P.
Large shareholder
4,980,000 -22.0%
37.76
US$188,044,800 		4,980,000 -22.0% 37.76 US$188,044,800
2023-01-19 2023-01-17 PlS Planned sale
3.0
Glover Max R.

SVP of Worldwide Sales

Officer
25,000 -9.6%
34.21
US$855,340 		25,000 -9.6% 34.21 US$855,340
2023-01-13 2023-01-11 PlS Planned sale
3.0
Glover Max R.

SVP of Worldwide Sales

Officer
15,000 -5.5%
32.06
US$480,936 		15,000 -5.5% 32.06 US$480,936
2023-01-09 2023-01-06 PlS Planned sale
Valente Joanne

SVP, CHRO

Officer
1,377 -1.4%
30.00
US$41,315 		1,377 -1.4% 30.00 US$41,315
2023-01-06 2023-01-04 PlS Planned sale
Valente Joanne

SVP, CHRO

Officer
1,123 -1.1%
30.07
US$33,768 		1,123 -1.1% 30.07 US$33,768
2023-01-04 2023-01-03 PlS Planned sale
Valente Joanne

SVP, CHRO

Officer
2,500 -2.5%
30.27
US$75,684 		2,500 -2.5% 30.27 US$75,684
2023-01-04 2022-12-30 PlS Planned sale
Valente Joanne

SVP, CHRO

Officer
5,000 -4.7%
30.01
US$150,046 		5,000 -4.7% 30.01 US$150,046
2022-12-06 2022-12-05 PlS Planned sale
3.4
Doogue Michael

SVP, CTO

Officer
75,000 -49.6%
33.13
US$2,484,698 		75,000 -49.6% 33.13 US$2,484,698
2022-12-05 2022-12-01 PlS Planned sale
3.4
Doogue Michael

SVP, CTO

Officer
7,500 -4.7%
31.00
US$232,486 		7,500 -4.7% 31.00 US$232,486
2022-11-17 2022-11-15 PlS Planned sale
3.4
Doogue Michael

SVP, CTO

Officer
24,276 -13.3%
29.25
US$710,071 		24,276 -13.3% 29.25 US$710,071
2022-11-15 2022-11-14 PlS Planned sale
3.4
Doogue Michael

SVP, CTO

Officer
9,059 -4.7%
28.76
US$260,529 		9,059 -4.7% 28.76 US$260,529
2022-11-15 2022-11-11 PlS Planned sale
3.4
Doogue Michael

SVP, CTO

Officer
26,665 -12.2%
28.81
US$768,285 		26,665 -12.2% 28.81 US$768,285
2022-11-07 2022-11-04 S Sale
3.2
MARTIN JOSEPH R
Non-Executive Director
16,349 -31.5%
25.92
US$423,769 		16,349 -31.5% 25.92 US$423,769
2022-05-25 2022-05-23 S Sale
3.2
MARTIN JOSEPH R
Non-Executive Director
8,278 -16.0%
24.17
US$200,079 		8,278 -16.0% 24.17 US$200,079
2022-03-21 2022-03-18 PlS Planned sale
3.4
Doogue Michael

SVP of Technology and Products

Officer
7,500 -3.3%
29.04
US$217,800 		7,500 -3.3% 29.04 US$217,800
2021-12-23 2021-12-21 PlS Planned sale
2.9
Walsh Paul V Jr

SVP, CFO & Treasurer

Officer
50,000 -6.8%
33.42
US$1,671,000 		50,000 -6.8% 33.42 US$1,671,000
2021-12-08 2021-12-07 PlS Planned sale
2.9
Walsh Paul V Jr

SVP, CFO & Treasurer

Officer
75,000 -9.0%
33.92
US$2,544,000 		75,000 -9.0% 33.92 US$2,544,000
2021-11-24 2021-11-23 S Sale
3.2
MARTIN JOSEPH R
Non-Executive Director
13,000 -20.1%
30.61
US$397,930 		13,000 -20.1% 30.61 US$397,930
2021-11-24 2021-11-23 PlS Planned sale
2.9
Walsh Paul V Jr

SVP, CFO & Treasurer

Officer
50,000 -5.7%
30.75
US$1,537,500 		50,000 -5.7% 30.75 US$1,537,500
2021-11-23 2021-11-19 PlS Planned sale
3.0
Teebagy Thomas C. Jr.

SVP of Operations and Quality

Officer
2,101 -3.2%
32.59
US$68,472 		2,101 -3.2% 32.59 US$68,472
2021-11-23 2021-11-19 PlS Planned sale
3.0
Brown Christopher

SVP and General Counsel

Officer
2,132 -1.4%
32.59
US$69,482 		2,132 -1.4% 32.59 US$69,482
2021-11-23 2021-11-19 PlS Planned sale
3.0
Glover Max R.

SVP of Worldwide Sales

Officer
1,753 -0.7%
32.59
US$57,130 		1,753 -0.7% 32.59 US$57,130
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