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

MERCURY SYSTEMS INC

MRCY · Nasdaq · CIK 0001049521 · Technology · Aerospace & Defense

INSIDER SIGNAL

No active buy signal

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

51 Form 4 transaction lines observed in the same window
35 sales · 16 option, withholding, award, gift or other lines

Last qualifying purchase2024-08-27 · JANA Partners Management, LP · $506.6K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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
Ballhaus William LChairman, President & CEO
○▼▼▼▼○▼○▼○▼○▼
Ratner StevenEVP, CHRO
○○▼▼▼▼▼▼
KUPINSKY STUARTEVP, CLO & Corp Sec
○○▼▼▼▼▼
Farnsworth David E.EVP, CFO
○○▼▼▼▼
Munro DouglasSVP, CAO
○▼▼▼
Nearhos Barry RDirector
○○
● Purchase▼ Sale○ Other

—

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: 2024-08-27 · JANA Partners Management, LP.

Recent Form 4 activity

0Purchases
46Sales
27Other Form 4 lines
50SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING35 sale line(s) · context only
OTHER16 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 has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

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

Shares short
5,013,538
Previous report
5,032,343
Avg daily volume
678,670
Days to cover
7.4

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
2024-08-27JANA Partners Management, LPPurchase (P)Common Stock13,600USD 37.25USD 506,600SEC filing ↗
2024-02-28JANA Partners Management, LPPurchase (P)Common Stock75,000USD 29.63USD 2,222,250SEC filing ↗
2024-02-27JANA Partners Management, LPPurchase (P)Common Stock284,295USD 29.21USD 8,304,257SEC filing ↗
2024-02-26JANA Partners Management, LPPurchase (P)Common Stock18,618USD 28.53USD 531,172SEC filing ↗
2024-02-12Ballhaus William LPurchase (P)Common Stock3,413USD 29.30USD 100,000SEC filing ↗
2024-02-09JANA Partners Management, LPPurchase (P)Common Stock1,335,848USD 27.90USD 37,270,159SEC filing ↗
2024-02-09Ballhaus William LPurchase (P)Common Stock3,653USD 28.22USD 103,093SEC filing ↗
2024-02-09Nearhos Barry RPurchase (P)Common Stock3,500USD 27.15USD 95,025SEC filing ↗
2024-02-09LANCE HOWARD LPurchase (P)Common Stock7,485USD 26.77USD 200,373SEC filing ↗
2024-02-09Farnsworth David E.Purchase (P)Common Stock3,567USD 28.09USD 100,197SEC filing ↗
2023-11-30JANA Partners Management, LPPurchase (P)Common Stock63,648USD 34.22USD 2,178,035SEC filing ↗
2023-11-29JANA Partners Management, LPPurchase (P)Common Stock117,881USD 33.22USD 3,916,007SEC filing ↗
2023-11-28JANA Partners Management, LPPurchase (P)Common Stock64,435USD 33.14USD 2,135,376SEC filing ↗
2023-11-20JANA Partners Management, LPPurchase (P)Common Stock315USD 34.05USD 10,726SEC filing ↗
2023-11-17JANA Partners Management, LPPurchase (P)Common Stock44,057USD 34.08USD 1,501,463SEC filing ↗

Form 4 evidence

73 transaction lines in the latest 365-day window; 424 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Nearhos Barry RAward / grant (A)Common Stock235USD 0.00USD 0SEC filing ↗
2026-09-21KUPINSKY STUARTSale (S)Common Stock1,000USD 86.52USD 86,520SEC filing ↗
2026-09-03Ratner StevenSale (S)Common Stock4,000USD 84.51USD 338,040SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Nearhos Barry RAward / grant (A)Common Stock235USD 0.00USD 0SEC filing ↗
2026-09-21KUPINSKY STUARTSale (S)Common Stock1,000USD 86.52USD 86,520SEC filing ↗
2026-09-03Ratner StevenSale (S)Common Stock4,000USD 84.51USD 338,040SEC filing ↗
2026-08-26Ballhaus William LSale (S)Common Stock49,090USD 89.09USD 4,373,568SEC filing ↗
2026-08-26Ballhaus William LOption exercise / conversion (M)Common Stock68,476USD 43.00USD 2,944,468SEC filing ↗
2026-08-25Ballhaus William LSale (S)Common Stock111,076USD 87.12USD 9,676,712SEC filing ↗
2026-08-25Ballhaus William LOption exercise / conversion (M)Common Stock153,676USD 43.00USD 6,608,068SEC filing ↗
2026-08-24Ballhaus William LSale (S)Common Stock108,209USD 89.50USD 9,684,553SEC filing ↗
2026-08-24Ballhaus William LOption exercise / conversion (M)Common Stock151,998USD 42.07USD 6,395,264SEC filing ↗
2026-08-21Ratner StevenSale (S)Common Stock356USD 91.36USD 32,524SEC filing ↗
2026-08-21KUPINSKY STUARTSale (S)Common Stock1,000USD 95.23USD 95,230SEC filing ↗
2026-08-21Ballhaus William LSale (S)Common Stock65,000USD 92.40USD 6,006,226SEC filing ↗
2026-08-21Ballhaus William LOption exercise / conversion (M)Common Stock92,850USD 42.00USD 3,899,700SEC filing ↗
2026-08-20Ratner StevenSale (S)Common Stock1,026USD 97.67USD 100,209SEC filing ↗
2026-08-20Munro DouglasSale (S)Common Stock109USD 97.67USD 10,646SEC filing ↗
2026-08-20Farnsworth David E.Sale (S)Common Stock6,612USD 97.67USD 645,794SEC filing ↗
2026-08-20Ballhaus William LSale (S)Common Stock22,010USD 97.67USD 2,149,717SEC filing ↗
2026-08-19Ratner StevenSale (S)Common Stock2,187USD 100.31USD 219,378SEC filing ↗
2026-08-19Munro DouglasSale (S)Common Stock548USD 100.31USD 54,970SEC filing ↗
2026-08-19KUPINSKY STUARTSale (S)Common Stock1,308USD 100.31USD 131,205SEC filing ↗
2026-08-19Farnsworth David E.Sale (S)Common Stock8,155USD 100.31USD 818,028SEC filing ↗
2026-08-19Ballhaus William LSale (S)Common Stock26,802USD 100.31USD 2,688,509SEC filing ↗
2026-08-18Ratner StevenSale (S)Common Stock1,971USD 111.36USD 219,491SEC filing ↗
2026-08-18Munro DouglasSale (S)Common Stock494USD 111.36USD 55,012SEC filing ↗
2026-08-18KUPINSKY STUARTSale (S)Common Stock1,178USD 111.36USD 131,182SEC filing ↗
2026-08-18Farnsworth David E.Sale (S)Common Stock7,347USD 111.36USD 818,162SEC filing ↗
2026-08-18Ballhaus William LSale (S)Common Stock24,144USD 111.36USD 2,688,676SEC filing ↗
2026-08-17Ratner StevenAward / grant (A)Common Stock5,187USD 0.00USD 0SEC filing ↗
2026-08-17Munro DouglasAward / grant (A)Common Stock2,882USD 0.00USD 0SEC filing ↗
2026-08-17KUPINSKY STUARTAward / grant (A)Common Stock5,619USD 0.00USD 0SEC 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 · —
TickerMRCY
CIK0001049521
SectorTechnology
IndustryAerospace & Defense Yahoo Finance
SEC SIC3670 Electronic Components & Accessories
ExchangeNasdaq

Data coverage

Local Form 4 history424 transaction lines from 2020-01-14 to 2026-10-15
23 P purchase lines · 220 S sale lines · 181 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.