ALGM

Allegro Microsystems, INC.

Insider trading activity for Allegro Microsystems, INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$146.8K

net selling

Bought(0 · 0 insiders): $0
Sold(2 · 2 insiders): $146.8K

Past 6 months

-$3.6M

net selling

Bought(0 · 0 insiders): $0
Sold(9 · 9 insiders): $3.6M

Past 12 months

-$5.2M

net selling

Bought(0 · 0 insiders): $0
Sold(13 · 9 insiders): $5.2M

Transaction history

The 78 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 17	Raubacher Jennie	Director	SSELL◷?	1,000	$45.32	$45.3K	-6.7%	Open the original filing on SEC.gov
Aug 10	Hagen Erin	SVP, CHRO	SSELL◷?	2,285	$44.39	$101.4K	-6.9%	Open the original filing on SEC.gov
Aug 5	Suzuki Yoshihiro	Director	AGRANT	4,251	—	—	+2.0%	Open the original filing on SEC.gov
Aug 5	Martin Joseph R	Director	AGRANT	4,251	—	—	+12.1%	Open the original filing on SEC.gov
Aug 5	Puma Mary G	Director	AGRANT	4,251	—	—	+24.3%	Open the original filing on SEC.gov
Aug 5	Palepu Krishna G.	Director	AGRANT	4,251	—	—	+42.7%	Open the original filing on SEC.gov
Aug 5	Raubacher Jennie	Director	AGRANT◆	4,251	—	—	—	Open the original filing on SEC.gov
Aug 5	Willett Robert	Director	AGRANT◆	4,251	—	—	—	Open the original filing on SEC.gov
Aug 5	White Brian C	Director	AGRANT◆	4,251	—	—	—	Open the original filing on SEC.gov
Jun 17	White Brian C	Director	AGRANT	594	—	—	—	Open the original filing on SEC.gov
Jun 3	Madormo Richard	SVP, Worldwide Sales	SSELL	5,000	$52.72	$263.6K	-6.7%	Open the original filing on SEC.gov
May 22	Coleman Troy	SVP, General Manager,…	SSELL	4,500	$45.72	$205.7K	-5.5%	Open the original filing on SEC.gov
May 21	Webster Roald Graham	VP, Chief Accounting…	SSELL	5,217	$44.89	$234.2K	-28.5%	Open the original filing on SEC.gov
May 18	Kent Ian	SVP, Global Operations	SSELL	2,642	$41.56	$109.8K	-9.4%	Open the original filing on SEC.gov
May 16	Kent Ian	SVP, Global Operations	FTAX	2,345	$43.10	$101.1K	-7.7%	Open the original filing on SEC.gov
May 16	Hagen Erin	SVP, CHRO	FTAX	5,815	$43.10	$250.6K	-14.8%	Open the original filing on SEC.gov
May 16	D'Antilio Derek	EVP, CFO & Treasurer	FTAX	37,840	$43.10	$1.6M	-13.7%	Open the original filing on SEC.gov
May 16	Madormo Richard	SVP, Worldwide Sales	FTAX	5,439	$43.10	$234.4K	-6.8%	Open the original filing on SEC.gov
May 16	Webster Roald Graham	VP, Chief Accounting…	FTAX	4,277	$43.10	$184.3K	-18.9%	Open the original filing on SEC.gov
May 16	Doogue Michael	President and CEO	FTAX	60,508	$43.10	$2.6M	-17.8%	Open the original filing on SEC.gov
May 16	Briansky Sharon	SVP, GC and Secretary	FTAX	13,942	$43.10	$600.9K	-14.9%	Open the original filing on SEC.gov
May 16	Coleman Troy	SVP, General Manager,…	FTAX	9,670	$43.10	$416.8K	-10.5%	Open the original filing on SEC.gov
May 14	Lynch Susan D	Director	SSELL	16,711	$45.46	$759.6K	-56.6%	Open the original filing on SEC.gov
May 13	Willett Robert	Director	AGRANT	1,094	—	—	—	Open the original filing on SEC.gov
May 13	Kent Ian	SVP, Global Operations	AGRANT	8,492	—	—	+38.8%	Open the original filing on SEC.gov
May 13	D'Antilio Derek	EVP, CFO & Treasurer	AGRANT	30,438	—	—	+12.4%	Open the original filing on SEC.gov
May 13	D'Antilio Derek	EVP, CFO & Treasurer	AGRANT	29,439	—	—	+13.6%	Open the original filing on SEC.gov
May 13	Madormo Richard	SVP, Worldwide Sales	AGRANT	19,815	—	—	+32.9%	Open the original filing on SEC.gov
May 13	Briansky Sharon	SVP, GC and Secretary	AGRANT	2,611	—	—	+2.9%	Open the original filing on SEC.gov
May 13	Briansky Sharon	SVP, GC and Secretary	AGRANT	15,852	—	—	+21.1%	Open the original filing on SEC.gov
May 13	Coleman Troy	SVP, General Manager,…	AGRANT	18,116	—	—	+24.6%	Open the original filing on SEC.gov
May 13	Doogue Michael	President and CEO	AGRANT	83,700	—	—	+32.7%	Open the original filing on SEC.gov
May 13	Doogue Michael	President and CEO	AGRANT	77,135	—	—	+43.1%	Open the original filing on SEC.gov
May 13	Hagen Erin	SVP, CHRO	AGRANT	9,058	—	—	+30.1%	Open the original filing on SEC.gov
May 13	Webster Roald Graham	VP, Chief Accounting…	AGRANT	544	—	—	+2.5%	Open the original filing on SEC.gov
May 13	Webster Roald Graham	VP, Chief Accounting…	AGRANT	4,756	—	—	+27.5%	Open the original filing on SEC.gov
May 11	Briansky Sharon	SVP, GC and Secretary	SSELL	8,948	$47.54	$425.4K	-10.6%	Open the original filing on SEC.gov
May 11	Doogue Michael	President and CEO	SSELL	30,089	$47.23	$1.4M	-10.6%	Open the original filing on SEC.gov
Mar 24	Madormo Richard	SVP, Worldwide Sales	DTOISS	6,498	$32.58	$211.7K	-9.7%	Open the original filing on SEC.gov
Mar 2	Briansky Sharon	SVP, GC and Secretary	SSELL◷?	9,727	$35.00	$340.4K	-10.4%	Open the original filing on SEC.gov
Mar 2	Hagen Erin	SVP, CHRO	SSELL	2,598	$35.00	$90.9K	-8.0%	Open the original filing on SEC.gov
Feb 27	Briansky Sharon	SVP, GC and Secretary	FTAX	9,107	$36.47	$332.1K	-8.8%	Open the original filing on SEC.gov
Feb 27	D'Antilio Derek	EVP, CFO & Treasurer	FTAX	9,995	$36.47	$364.5K	-4.4%	Open the original filing on SEC.gov
Feb 27	Hagen Erin	SVP, CHRO	FTAX	1,996	$36.47	$72.8K	-5.8%	Open the original filing on SEC.gov
Feb 17	Briansky Sharon	SVP, GC and Secretary	SSELL◷?	9,258	$41.56	$384.8K	-8.3%	Open the original filing on SEC.gov
Feb 13	Briansky Sharon	SVP, GC and Secretary	FTAX	8,991	$42.38	$381K	-7.4%	Open the original filing on SEC.gov
Feb 13	D'Antilio Derek	EVP, CFO & Treasurer	FTAX	17,808	$42.38	$754.7K	-7.3%	Open the original filing on SEC.gov
Feb 2	Kent Ian	SVP, Global Operations	AGRANT	9,183	—	—	+72.3%	Open the original filing on SEC.gov
Dec 10, 2025	Briansky Sharon	SVP, GC and Secretary	SSELL◷?	27,873	$30.00	$836.2K	-18.7%	Open the original filing on SEC.gov
Nov 11, 2025	Coleman Troy	SVP, General Manager,…	AGRANT	73,530	—	—	—	Open the original filing on SEC.gov
Aug 22, 2025	Webster Roald Graham	VP, Chief Accounting…	SSELL	8,266	$32.81	$271.2K	-32.3%	Open the original filing on SEC.gov
Aug 12, 2025	Lury Richard R.	Director	SSELL	7,000	$31.81	$222.7K	-27.1%	Open the original filing on SEC.gov
Aug 7, 2025	Raubacher Jennie	Director	AGRANT	5,932	—	—	+65.6%	Open the original filing on SEC.gov
Aug 7, 2025	Lury Richard R.	Director	AGRANT	5,932	—	—	+29.8%	Open the original filing on SEC.gov
Aug 7, 2025	Lynch Susan D	Director	AGRANT	5,932	—	—	+25.1%	Open the original filing on SEC.gov
Aug 7, 2025	Palepu Krishna G.	Director	AGRANT	5,932	—	—	+147.2%	Open the original filing on SEC.gov
Aug 7, 2025	Martin Joseph R	Director	AGRANT	5,932	—	—	+20.3%	Open the original filing on SEC.gov
Aug 7, 2025	Puma Mary G	Director	AGRANT	5,932	—	—	+51.3%	Open the original filing on SEC.gov
Aug 7, 2025	Suzuki Yoshihiro	Director	AGRANT	5,932	—	—	+2.9%	Open the original filing on SEC.gov
Aug 4, 2025	Hagen Erin	SVP, CHRO	SSELL	5,043	$31.18	$157.2K	-12.7%	Open the original filing on SEC.gov
Jun 11, 2025	Lury Richard R.	Director	SSELL	3,100	$30.45	$94.4K	-13.5%	Open the original filing on SEC.gov
Jun 4, 2025	Lury Richard R.	Director	SSELL	6,849	$27.60	$189K	-22.9%	Open the original filing on SEC.gov
May 16, 2025	Doogue Michael	President and CEO	FTAX	21,730	$27.51	$597.8K	-9.2%	Open the original filing on SEC.gov
May 16, 2025	Webster Roald Graham	VP, Chief Accounting…	FTAX	4,948	$27.51	$136.1K	-16.2%	Open the original filing on SEC.gov
May 16, 2025	Hagen Erin	SVP, CHRO	FTAX	4,899	$27.51	$134.8K	-11.0%	Open the original filing on SEC.gov
May 16, 2025	Briansky Sharon	SVP, GC and Secretary	FTAX	18,712	$27.51	$514.8K	-11.2%	Open the original filing on SEC.gov
May 16, 2025	D'Antilio Derek	EVP, CFO & Treasurer	FTAX	29,911	$27.51	$822.9K	-10.9%	Open the original filing on SEC.gov
May 15, 2025	Doogue Michael	President and CEO	AGRANT	150,226	—	—	+172.6%	Open the original filing on SEC.gov
May 15, 2025	Webster Roald Graham	VP, Chief Accounting…	AGRANT	9,765	—	—	+47.1%	Open the original filing on SEC.gov
May 15, 2025	Madormo Richard	SVP, Worldwide Sales	AGRANT	37,557	—	—	+128.4%	Open the original filing on SEC.gov
May 15, 2025	Hagen Erin	SVP, CHRO	AGRANT	18,153	—	—	+68.6%	Open the original filing on SEC.gov
May 15, 2025	Briansky Sharon	SVP, GC and Secretary	AGRANT	35,053	—	—	+26.4%	Open the original filing on SEC.gov
May 15, 2025	D'Antilio Derek	EVP, CFO & Treasurer	AGRANT	65,098	—	—	+31.1%	Open the original filing on SEC.gov
May 13, 2025	Doogue Michael	President and CEO	AGRANT	18,489	—	—	+27.0%	Open the original filing on SEC.gov
May 13, 2025	D'Antilio Derek	EVP, CFO & Treasurer	AGRANT	21,295	—	—	+11.3%	Open the original filing on SEC.gov
May 13, 2025	Webster Roald Graham	VP, Chief Accounting…	AGRANT	1,002	—	—	+5.1%	Open the original filing on SEC.gov
May 13, 2025	Hagen Erin	SVP, CHRO	AGRANT	1,222	—	—	+4.8%	Open the original filing on SEC.gov
May 13, 2025	Briansky Sharon	SVP, GC and Secretary	AGRANT	14,656	—	—	+12.4%	Open the original filing on SEC.gov

SSELL◷?$45.3K

Raubacher Jennie · DirectorAug 17

1,000 sh @ $45.32 · -6.7% own

SSELL◷?$101.4K

Hagen Erin · SVP, CHROAug 10

2,285 sh @ $44.39 · -6.9% own

AGRANT—

Suzuki Yoshihiro · DirectorAug 5

4,251 sh · +2.0% own

AGRANT—

Martin Joseph R · DirectorAug 5

4,251 sh · +12.1% own

AGRANT—

Puma Mary G · DirectorAug 5

4,251 sh · +24.3% own

AGRANT—

Palepu Krishna G. · DirectorAug 5

4,251 sh · +42.7% own

AGRANT◆—

Raubacher Jennie · DirectorAug 5

4,251 sh

AGRANT◆—

Willett Robert · DirectorAug 5

4,251 sh

AGRANT◆—

White Brian C · DirectorAug 5

4,251 sh

AGRANT—

White Brian C · DirectorJun 17

594 sh

SSELL$263.6K

Madormo Richard · SVP, Worldwide…Jun 3

5,000 sh @ $52.72 · -6.7% own

SSELL$205.7K

Coleman Troy · SVP, General…May 22

4,500 sh @ $45.72 · -5.5% own

SSELL$234.2K

Webster Roald Graham · VP, Chief Accounti…May 21

5,217 sh @ $44.89 · -28.5% own

SSELL$109.8K

Kent Ian · SVP, Global…May 18

2,642 sh @ $41.56 · -9.4% own

FTAX$101.1K

Kent Ian · SVP, Global…May 16

2,345 sh @ $43.10 · -7.7% own

FTAX$250.6K

Hagen Erin · SVP, CHROMay 16

5,815 sh @ $43.10 · -14.8% own

FTAX$1.6M

D'Antilio Derek · EVP, CFO & Treasur…May 16

37,840 sh @ $43.10 · -13.7% own

FTAX$234.4K

Madormo Richard · SVP, Worldwide…May 16

5,439 sh @ $43.10 · -6.8% own

FTAX$184.3K

Webster Roald Graham · VP, Chief Accounti…May 16

4,277 sh @ $43.10 · -18.9% own

FTAX$2.6M

Doogue Michael · President and CEOMay 16

60,508 sh @ $43.10 · -17.8% own

FTAX$600.9K

Briansky Sharon · SVP, GC and…May 16

13,942 sh @ $43.10 · -14.9% own

FTAX$416.8K

Coleman Troy · SVP, General…May 16

9,670 sh @ $43.10 · -10.5% own

SSELL$759.6K

Lynch Susan D · DirectorMay 14

16,711 sh @ $45.46 · -56.6% own

AGRANT—

Willett Robert · DirectorMay 13

1,094 sh

AGRANT—

Kent Ian · SVP, Global…May 13

8,492 sh · +38.8% own

AGRANT—

D'Antilio Derek · EVP, CFO & Treasur…May 13

30,438 sh · +12.4% own

AGRANT—

D'Antilio Derek · EVP, CFO & Treasur…May 13

29,439 sh · +13.6% own

AGRANT—

Madormo Richard · SVP, Worldwide…May 13

19,815 sh · +32.9% own

AGRANT—

Briansky Sharon · SVP, GC and…May 13

2,611 sh · +2.9% own

AGRANT—

Briansky Sharon · SVP, GC and…May 13

15,852 sh · +21.1% own

AGRANT—

Coleman Troy · SVP, General…May 13

18,116 sh · +24.6% own

AGRANT—

Doogue Michael · President and CEOMay 13

83,700 sh · +32.7% own

AGRANT—

Doogue Michael · President and CEOMay 13

77,135 sh · +43.1% own

AGRANT—

Hagen Erin · SVP, CHROMay 13

9,058 sh · +30.1% own

AGRANT—

Webster Roald Graham · VP, Chief Accounti…May 13

544 sh · +2.5% own

AGRANT—

Webster Roald Graham · VP, Chief Accounti…May 13

4,756 sh · +27.5% own

SSELL$425.4K

Briansky Sharon · SVP, GC and…May 11

8,948 sh @ $47.54 · -10.6% own

SSELL$1.4M

Doogue Michael · President and CEOMay 11

30,089 sh @ $47.23 · -10.6% own

DTOISS$211.7K

Madormo Richard · SVP, Worldwide…Mar 24

6,498 sh @ $32.58 · -9.7% own

SSELL◷?$340.4K

Briansky Sharon · SVP, GC and…Mar 2

9,727 sh @ $35.00 · -10.4% own

SSELL$90.9K

Hagen Erin · SVP, CHROMar 2

2,598 sh @ $35.00 · -8.0% own

FTAX$332.1K

Briansky Sharon · SVP, GC and…Feb 27

9,107 sh @ $36.47 · -8.8% own

FTAX$364.5K

D'Antilio Derek · EVP, CFO & Treasur…Feb 27

9,995 sh @ $36.47 · -4.4% own

FTAX$72.8K

Hagen Erin · SVP, CHROFeb 27

1,996 sh @ $36.47 · -5.8% own

SSELL◷?$384.8K

Briansky Sharon · SVP, GC and…Feb 17

9,258 sh @ $41.56 · -8.3% own

FTAX$381K

Briansky Sharon · SVP, GC and…Feb 13

8,991 sh @ $42.38 · -7.4% own

FTAX$754.7K

D'Antilio Derek · EVP, CFO & Treasur…Feb 13

17,808 sh @ $42.38 · -7.3% own

AGRANT—

Kent Ian · SVP, Global…Feb 2

9,183 sh · +72.3% own

SSELL◷?$836.2K

Briansky Sharon · SVP, GC and…Dec 10, 2025

27,873 sh @ $30.00 · -18.7% own

AGRANT—

Coleman Troy · SVP, General…Nov 11, 2025

73,530 sh

SSELL$271.2K

Webster Roald Graham · VP, Chief Accounti…Aug 22, 2025

8,266 sh @ $32.81 · -32.3% own

SSELL$222.7K

Lury Richard R. · DirectorAug 12, 2025

7,000 sh @ $31.81 · -27.1% own

AGRANT—

Raubacher Jennie · DirectorAug 7, 2025

5,932 sh · +65.6% own

AGRANT—

Lury Richard R. · DirectorAug 7, 2025

5,932 sh · +29.8% own

AGRANT—

Lynch Susan D · DirectorAug 7, 2025

5,932 sh · +25.1% own

AGRANT—

Palepu Krishna G. · DirectorAug 7, 2025

5,932 sh · +147.2% own

AGRANT—

Martin Joseph R · DirectorAug 7, 2025

5,932 sh · +20.3% own

AGRANT—

Puma Mary G · DirectorAug 7, 2025

5,932 sh · +51.3% own

AGRANT—

Suzuki Yoshihiro · DirectorAug 7, 2025

5,932 sh · +2.9% own

SSELL$157.2K

Hagen Erin · SVP, CHROAug 4, 2025

5,043 sh @ $31.18 · -12.7% own

SSELL$94.4K

Lury Richard R. · DirectorJun 11, 2025

3,100 sh @ $30.45 · -13.5% own

SSELL$189K

Lury Richard R. · DirectorJun 4, 2025

6,849 sh @ $27.60 · -22.9% own

FTAX$597.8K

Doogue Michael · President and CEOMay 16, 2025

21,730 sh @ $27.51 · -9.2% own

FTAX$136.1K

Webster Roald Graham · VP, Chief Accounti…May 16, 2025

4,948 sh @ $27.51 · -16.2% own

FTAX$134.8K

Hagen Erin · SVP, CHROMay 16, 2025

4,899 sh @ $27.51 · -11.0% own

FTAX$514.8K

Briansky Sharon · SVP, GC and…May 16, 2025

18,712 sh @ $27.51 · -11.2% own

FTAX$822.9K

D'Antilio Derek · EVP, CFO & Treasur…May 16, 2025

29,911 sh @ $27.51 · -10.9% own

AGRANT—

Doogue Michael · President and CEOMay 15, 2025

150,226 sh · +172.6% own

AGRANT—

Webster Roald Graham · VP, Chief Accounti…May 15, 2025

9,765 sh · +47.1% own

AGRANT—

Madormo Richard · SVP, Worldwide…May 15, 2025

37,557 sh · +128.4% own

AGRANT—

Hagen Erin · SVP, CHROMay 15, 2025

18,153 sh · +68.6% own

AGRANT—

Briansky Sharon · SVP, GC and…May 15, 2025

35,053 sh · +26.4% own

AGRANT—

D'Antilio Derek · EVP, CFO & Treasur…May 15, 2025

65,098 sh · +31.1% own

AGRANT—

Doogue Michael · President and CEOMay 13, 2025

18,489 sh · +27.0% own

AGRANT—

D'Antilio Derek · EVP, CFO & Treasur…May 13, 2025

21,295 sh · +11.3% own

AGRANT—

Webster Roald Graham · VP, Chief Accounti…May 13, 2025

1,002 sh · +5.1% own

AGRANT—

Hagen Erin · SVP, CHROMay 13, 2025

1,222 sh · +4.8% own

AGRANT—

Briansky Sharon · SVP, GC and…May 13, 2025

14,656 sh · +12.4% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 65 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 18 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Feb 2	Mar 3	Kent IanSVP, Global Operations	18days	—	Filing ↗

Kent IanSVP, Global Operations

18days

Traded Feb 2 · filed Mar 3Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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