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MASS — 908 Devices Inc.

Health Care · Laboratory Analytical Instruments · Nasdaq

CIK 0001555279 · FYE 1231 · All Form 4 filings on EDGAR ↗

2Insiders filing

3Transactions

+$0Reported buys

−$655kReported sells

0Cluster events

Window in data: 2026-08-20 → 2026-08-25 · Data as of 2026-08-28

Insiders

Insider	Role	Txns	Reported value
AWM Investment Company, Inc.	10% Owner	2	$530k
Griffith Joseph H. IV	Chief Financial Officer	1	$125k

Transaction history

Filing date	Trade date	Ticker	Insider	Type	Shares	Price	Value	Cluster
2026-08-27	2026-08-25	MASS	Griffith Joseph H. IV Chief Financial Officer 10b5-1	S	11,459	$10.95	−$125k	—
2026-08-24	2026-08-21	MASS	AWM Investment Company, Inc. 10% Owner	S	41,578	$10.61	−$441k	—
2026-08-24	2026-08-20	MASS	AWM Investment Company, Inc. 10% Owner	S	8,422	$10.52	−$89k	—

Known data limitations

Form 4 lag: insiders have 2 business days to file after a trade (weekends and holidays extend this), and this site re-ingests once daily — a transaction can appear here roughly three business days after it happened.
13F lag: quarterly 13F-HR holdings cover the prior quarter-end and are due 45 days after it — every institutional position shown here is at least 45 days old by construction, often more.
CUSIP→ticker gaps: 13F positions are reported by CUSIP; some holdings cannot be matched to a current ticker (delistings, corporate actions, thin metadata) and appear without one or are omitted from ticker-level views.
EDGAR timing variability: institutions file at different hours and days within their windows; amended filings (4/A, 13F-HR/A) can restate earlier periods, so historical aggregates may change between batches.

Insider Atlas is a descriptive research site, not investment advice — see the methodology for the full provenance chain.