Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

ALLEGRO MICROSYSTEMS, INC.

ALGM · Nasdaq · CIK 0000866291 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

35 Form 4 transaction lines observed in the same window
9 sales · 26 option, withholding, award, gift or other lines

Last qualifying purchase2024-11-18 · Doogue Michael · $285.0K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Madormo RichardSVP, Worldwide Sales
○○▼
Coleman TroySVP, General Manager, Products
○○▼
Webster Roald GrahamVP, Chief Accounting Officer
○○▼
Kent IanSVP, Global Operations
○○▼
Hagen ErinSVP, CHRO
○○▼
Doogue MichaelPresident and CEO
▼○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 10 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-11-18 · Doogue Michael.

Recent Form 4 activity

0Purchases
13Sales
34Other Form 4 lines
39SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING9 sale line(s) · context only
OTHER26 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+11.3%
3M
-30.2%
6M
+21.1%
12M
—

Volatility & liquidity

Volatility
67.1%
Beta
—
Avg daily value
—

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
-1.6%
ROE
-1.5%
Industry
Semiconductors

Market data

Price data up to: 2026-10-02 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2026-03-27 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
11,385,558
Previous report
10,439,912
Avg daily volume
2,585,039
Days to cover
4.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-11-18Doogue MichaelPurchase (P)Common Stock15,000USD 19.00USD 285,000SEC filing ↗
2024-11-05Nargolwala Vineet APurchase (P)Common Stock5,000USD 19.89USD 99,446SEC filing ↗
2023-11-17Nargolwala Vineet APurchase (P)Common Stock1,000USD 27.84USD 27,840SEC filing ↗
2023-11-14Lynch Susan DPurchase (P)Common Stock350USD 27.37USD 9,580SEC filing ↗
2023-09-15D'Antilio DerekPurchase (P)Common Stock1,488USD 33.63USD 50,041SEC filing ↗
2023-08-16Nargolwala Vineet APurchase (P)Common Stock5,000USD 38.67USD 193,350SEC filing ↗
2023-02-03Lynch Susan DPurchase (P)Common Stock240USD 41.53USD 9,967SEC filing ↗

Form 4 evidence

47 transaction lines in the latest 365-day window; 408 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Raubacher JennieSale (S)Common Stock1,000USD 45.32USD 45,320SEC filing ↗
2026-08-10Hagen ErinSale (S)Common Stock2,285USD 44.39USD 101,431SEC filing ↗
2026-08-05Suzuki YoshihiroAward / grant (A)Common Stock4,251USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Raubacher JennieSale (S)Common Stock1,000USD 45.32USD 45,320SEC filing ↗
2026-08-10Hagen ErinSale (S)Common Stock2,285USD 44.39USD 101,431SEC filing ↗
2026-08-05Suzuki YoshihiroAward / grant (A)Common Stock4,251USD 0.00USD 0SEC filing ↗
2026-08-05Palepu Krishna G.Award / grant (A)Common Stock4,251USD 0.00USD 0SEC filing ↗
2026-08-05PUMA MARY GAward / grant (A)Common Stock4,251USD 0.00USD 0SEC filing ↗
2026-08-05MARTIN JOSEPH RAward / grant (A)Common Stock4,251USD 0.00USD 0SEC filing ↗
2026-06-17WHITE BRIAN CAward / grant (A)Common Stock594USD 0.00USD 0SEC filing ↗
2026-06-03Madormo RichardSale (S)Common Stock5,000USD 52.72USD 263,600SEC filing ↗
2026-05-22Coleman TroySale (S)Common Stock4,500USD 45.72USD 205,740SEC filing ↗
2026-05-21Webster Roald GrahamSale (S)Common Stock5,217USD 44.89USD 234,191SEC filing ↗
2026-05-18Kent IanSale (S)Common Stock2,642USD 41.56USD 109,802SEC filing ↗
2026-05-16Webster Roald GrahamTax withholding (F)Common Stock4,277USD 43.10USD 184,339SEC filing ↗
2026-05-16Madormo RichardTax withholding (F)Common Stock5,439USD 43.10USD 234,421SEC filing ↗
2026-05-16Kent IanTax withholding (F)Common Stock2,345USD 43.10USD 101,070SEC filing ↗
2026-05-16Hagen ErinTax withholding (F)Common Stock5,815USD 43.10USD 250,626SEC filing ↗
2026-05-16Doogue MichaelTax withholding (F)Common Stock60,508USD 43.10USD 2,607,895SEC filing ↗
2026-05-16D'Antilio DerekTax withholding (F)Common Stock37,840USD 43.10USD 1,630,904SEC filing ↗
2026-05-16Coleman TroyTax withholding (F)Common Stock9,670USD 43.10USD 416,777SEC filing ↗
2026-05-16Briansky SharonTax withholding (F)Common Stock13,942USD 43.10USD 600,900SEC filing ↗
2026-05-14Lynch Susan DSale (S)Common Stock16,711USD 45.46USD 759,682SEC filing ↗
2026-05-13Willett RobertAward / grant (A)Common Stock1,094USD 0.00USD 0SEC filing ↗
2026-05-13Webster Roald GrahamAward / grant (A)Common Stock5,300USD 0.00USD 0SEC filing ↗
2026-05-13Madormo RichardAward / grant (A)Common Stock19,815USD 0.00USD 0SEC filing ↗
2026-05-13Kent IanAward / grant (A)Common Stock8,492USD 0.00USD 0SEC filing ↗
2026-05-13Hagen ErinAward / grant (A)Common Stock9,058USD 0.00USD 0SEC filing ↗
2026-05-13Doogue MichaelAward / grant (A)Common Stock160,835USD 0.00USD 0SEC filing ↗
2026-05-13D'Antilio DerekAward / grant (A)Common Stock59,877USD 0.00USD 0SEC filing ↗
2026-05-13Coleman TroyAward / grant (A)Common Stock18,116USD 0.00USD 0SEC filing ↗
2026-05-13Briansky SharonAward / grant (A)Common Stock18,463USD 0.00USD 0SEC filing ↗
2026-05-11Doogue MichaelSale (S)Common Stock30,089USD 47.23USD 1,421,103SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerALGM
CIK0000866291
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history408 transaction lines from 2020-10-28 to 2026-08-17
8 P purchase lines · 160 S sale lines · 240 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.