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

908 Devices Inc.

MASS · Nasdaq · CIK 0001555279 · Healthcare · Medical Devices

INSIDER SIGNAL

No active buy signal

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

62 Form 4 transaction lines observed in the same window
49 sales · 13 option, withholding, award, gift or other lines

Last qualifying purchase2025-05-15 · Knopp Kevin J. · $66.6K

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
AWM Investment Company, Inc.TenPercentOwner
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Brown Christopher D.Director
▼▼▼▼▼▼▼▼▼▼○▼
Knopp Kevin J.President and CEO
▼▼▼▼▼▼▼▼▼▼
Kenneweg JohnSVP, Sales & Product Marketing
▼○▼○▼○▼
Griffith Joseph H. IVChief Financial Officer
▼▼▼
Leonhart Michele M.Director
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 6 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: 2025-05-15 · Knopp Kevin J..

Recent Form 4 activity

0Purchases
59Sales
29Other Form 4 lines
48SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING49 sale line(s) · context only
OTHER13 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
2,727,932
Previous report
2,746,771
Avg daily volume
421,862
Days to cover
6.5

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
2025-05-15Knopp Kevin J.Purchase (P)Common Stock15,000USD 4.44USD 66,600SEC filing ↗
2025-05-14Spoto MarkPurchase (P)Common Stock10,000USD 4.29USD 42,850SEC filing ↗
2025-05-14Knopp Kevin J.Purchase (P)Common Stock15,000USD 4.32USD 64,800SEC filing ↗
2024-05-13Knopp Kevin J.Purchase (P)Common Stock10,000USD 6.42USD 64,200SEC filing ↗
2024-05-10Knopp Kevin J.Purchase (P)Common Stock10,000USD 5.77USD 57,700SEC filing ↗
2024-05-09Knopp Kevin J.Purchase (P)Common Stock10,000USD 5.83USD 58,300SEC filing ↗
2024-05-08Knopp Kevin J.Purchase (P)Common Stock10,000USD 5.72USD 57,200SEC filing ↗
2024-05-07Knopp Kevin J.Purchase (P)Common Stock10,000USD 5.60USD 56,000SEC filing ↗
2022-11-22Spoto MarkPurchase (P)Common Stock, par value $0.0012,585USD 9.65USD 24,945SEC filing ↗
2020-12-22Turner Michael S.Purchase (P)Common Stock, par value $0.0015,000USD 20.00USD 100,000SEC filing ↗
2020-12-22Spoto MarkPurchase (P)Common Stock, par value $0.0011,000USD 20.00USD 20,000SEC filing ↗
2020-12-22Kedar SharonPurchase (P)Common Stock, par value $0.001100,000USD 20.00USD 2,000,000SEC filing ↗
2020-12-22HRUSOVSKY E KEVINPurchase (P)Common Stock, par value $0.00150,000USD 20.00USD 1,000,000SEC filing ↗
2020-12-22CRANDELL KEITHPurchase (P)Common Stock, par value $0.001300,000USD 20.00USD 6,000,000SEC filing ↗
2020-12-22Basarsky Trent A.Purchase (P)Common Stock, par value $0.0015,000USD 20.00USD 100,000SEC filing ↗

Form 4 evidence

88 transaction lines in the latest 365-day window; 430 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-07Brown Christopher D.Sale (S)Common Stock30,000USD 11.89USD 356,700SEC filing ↗
2026-10-07Brown Christopher D.Option exercise / conversion (M)Common Stock60,000USD 1.75USD 105,000SEC filing ↗
2026-10-06Griffith Joseph H. IVSale (S)Common Stock5,000USD 13.03USD 65,150SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-07Brown Christopher D.Sale (S)Common Stock30,000USD 11.89USD 356,700SEC filing ↗
2026-10-07Brown Christopher D.Option exercise / conversion (M)Common Stock60,000USD 1.75USD 105,000SEC filing ↗
2026-10-06Griffith Joseph H. IVSale (S)Common Stock5,000USD 13.03USD 65,150SEC filing ↗
2026-09-29AWM Investment Company, Inc.Sale (S)Common Stock18,000USD 11.52USD 207,322SEC filing ↗
2026-09-24AWM Investment Company, Inc.Sale (S)Common Stock24,000USD 11.36USD 272,640SEC filing ↗
2026-09-23AWM Investment Company, Inc.Sale (S)Common Stock1,000USD 11.25USD 11,250SEC filing ↗
2026-09-17Kenneweg JohnSale (S)Common Stock5,257USD 10.22USD 53,727SEC filing ↗
2026-09-17Kenneweg JohnOption exercise / conversion (M)Common Stock5,257USD 0.96USD 5,047SEC filing ↗
2026-09-16Kenneweg JohnSale (S)Common Stock21,399USD 10.11USD 216,344SEC filing ↗
2026-09-16Kenneweg JohnOption exercise / conversion (M)Common Stock21,399USD 0.96USD 20,543SEC filing ↗
2026-09-15Kenneweg JohnSale (S)Common Stock1,000USD 10.00USD 10,000SEC filing ↗
2026-09-15Kenneweg JohnOption exercise / conversion (M)Common Stock1,000USD 0.96USD 960SEC filing ↗
2026-09-02Brown Christopher D.Sale (S)Common Stock30,000USD 10.58USD 317,400SEC filing ↗
2026-08-25Griffith Joseph H. IVSale (S)Common Stock11,459USD 10.95USD 125,476SEC filing ↗
2026-08-21AWM Investment Company, Inc.Sale (S)Common Stock41,578USD 10.61USD 441,143SEC filing ↗
2026-08-20AWM Investment Company, Inc.Sale (S)Common Stock8,422USD 10.52USD 88,599SEC filing ↗
2026-08-17Knopp Kevin J.Sale (S)Common Stock20,000USD 10.35USD 207,000SEC filing ↗
2026-08-13Knopp Kevin J.Sale (S)Common Stock7,622USD 10.06USD 76,677SEC filing ↗
2026-08-12Knopp Kevin J.Sale (S)Common Stock2,747USD 10.07USD 27,662SEC filing ↗
2026-08-11Knopp Kevin J.Sale (S)Common Stock145,918USD 9.90USD 1,444,330SEC filing ↗
2026-08-11Brown Christopher D.Sale (S)Common Stock8,358USD 9.23USD 77,144SEC filing ↗
2026-08-10Knopp Kevin J.Sale (S)Common Stock348USD 9.06USD 3,153SEC filing ↗
2026-08-10Brown Christopher D.Sale (S)Common Stock9,442USD 9.03USD 85,261SEC filing ↗
2026-08-05Brown Christopher D.Sale (S)Common Stock20,000USD 8.49USD 169,800SEC filing ↗
2026-08-04AWM Investment Company, Inc.Sale (S)Common Stock50,000USD 8.36USD 418,000SEC filing ↗
2026-08-01Vann Brandi COption exercise / conversion (M)Common Stock5,192USD —USD —SEC filing ↗
2026-07-02Knopp Kevin J.Sale (S)Common Stock222USD 9.07USD 2,014SEC filing ↗
2026-07-02Brown Christopher D.Sale (S)Common Stock2,200USD 9.02USD 19,844SEC filing ↗
2026-06-30Brown Christopher D.Sale (S)Common Stock20,000USD 8.84USD 176,800SEC filing ↗
2026-06-26Knopp Kevin J.Sale (S)Common Stock2,798USD 9.09USD 25,434SEC 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 · —
TickerMASS
CIK0001555279
SectorHealthcare
IndustryMedical Devices Yahoo Finance
SEC SIC3826 Laboratory Analytical Instruments
ExchangeNasdaq

Data coverage

Local Form 4 history430 transaction lines from 2020-12-22 to 2026-10-07
18 P purchase lines · 232 S sale lines · 180 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.