MASS Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 23.70%

Insider Buying (Last 12 Months): $42,900.00

Insider Selling (Last 12 Months): $360,970.92

908 Devices Insider Trading History Chart

908 Devices Share Price & Price History

^$6.65

▲ +0.43 (6.91%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

908 Devices Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
10/3/2025	Joseph H. Griffith, IV	CFO	Sell	4,292	$9.05	$38,842.60	92,930
10/2/2025	Joseph H. Griffith, IV	CFO	Sell	708	$9.04	$6,400.32	97,222
9/19/2025	Joseph H. Griffith, IV	CFO	Sell	5,000	$7.07	$35,350.00	97,930
6/18/2025	Michael S. Turner	insider	Sell	1,373	$7.50	$10,297.50
6/17/2025	Michael S Turner	Insider	Sell	7,148	$7.51	$53,681.48	1,373
6/16/2025	Michael S Turner	Insider	Sell	16,082	$7.51	$120,775.82	8,521
6/4/2025	Joseph H. Griffith, IV	CFO	Sell	6,940	$7.08	$49,135.20	102,930
5/14/2025	Mark Spoto	Director	Buy	10,000	$4.29	$42,900.00	62,971
2/3/2025	Joseph H. Griffith, IV	CFO	Sell	10,236	$2.34	$23,952.24	109,870
2/3/2025	Michael S Turner	Insider	Sell	9,672	$2.33	$22,535.76	24,603
5/13/2024	Kevin J. Knopp	CEO	Buy	10,000	$6.42	$64,200.00	508,981
5/9/2024	Kevin J. Knopp	CEO	Buy	10,000	$5.83	$58,300.00	488,981
5/7/2024	Kevin J. Knopp	CEO	Buy	10,000	$5.60	$56,000.00	468,981
2/1/2024	Joseph H. Griffith, IV	CFO	Sell	5,698	$7.00	$39,886.00	89,711
2/1/2024	Kevin J. Knopp	CEO	Sell	9,071	$7.00	$63,497.00	411,981
2/1/2024	Michael S Turner	Insider	Sell	5,232	$6.99	$36,571.68	9,105
12/21/2023	Christopher D Brown	Insider	Sell	7,370	$9.12	$67,214.40	877,905
12/19/2023	Christopher D Brown	Insider	Sell	7,395	$9.08	$67,146.60	890,510
12/19/2023	Joseph H. Griffith, IV	CFO	Sell	5,580	$9.08	$50,666.40	86,000
2/15/2023	Kevin J. Knopp	CEO	Sell	15,158	$10.29	$155,975.82	432,690
2/1/2023	Joseph H. Griffith, IV	CFO	Sell	1,836	$9.17	$16,836.12	94,846
2/1/2023	Kevin J. Knopp	CEO	Sell	4,049	$9.36	$37,898.64	487,848
2/1/2023	Michael S Turner	VP	Sell	1,579	$9.17	$14,479.43	2,848

SEC Filings (Institutional Ownership Changes) for 908 Devices (NASDAQ:MASS)

88.06% of 908 Devices stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

908 Devices Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/19/2025	GM Advisory Group LLC	678,086	$5.94M	0.3%	-41.8%	1.874%
11/17/2025	Susquehanna International Group LLP	23,778	$0.21M	0.0%	-45.4%	0.066%
11/17/2025	Millennium Management LLC	31,063	$0.27M	0.0%	-62.4%	0.086%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	12,700	$0.11M	0.0%	-15.2%	0.035%
11/17/2025	Granahan Investment Management LLC	64,338	$0.56M	0.0%	N/A	0.178%
11/17/2025	First Light Asset Management LLC	2,510,496	$21.99M	2.1%	+135.2%	6.937%
11/17/2025	Brevan Howard Capital Management LP	11,600	$0.10M	0.0%	N/A	0.032%
11/17/2025	Bank of America Corp DE	270,069	$2.37M	0.0%	-25.6%	0.746%
11/17/2025	Alliancebernstein L.P.	45,850	$0.40M	0.0%	-17.8%	0.127%
11/14/2025	Schonfeld Strategic Advisors LLC	103,025	$0.90M	0.0%	-56.4%	0.285%
11/14/2025	Raymond James Financial Inc.	183,282	$1.61M	0.0%	+2,649.5%	0.506%
11/14/2025	Brooklyn Investment Group	65,631	$0.58M	0.0%	N/A	0.181%
11/14/2025	Squarepoint Ops LLC	133,774	$1.17M	0.0%	N/A	0.370%
11/13/2025	BNP Paribas Financial Markets	5,374	$47K	0.0%	-74.8%	0.015%
11/13/2025	FourThought Financial Partners LLC	37,334	$0.33M	0.0%	N/A	0.103%
11/13/2025	Russell Investments Group Ltd.	10,640	$93K	0.0%	N/A	0.029%
11/12/2025	Amova Asset Management Americas Inc.	318,350	$2.79M	0.0%	-19.3%	0.888%
11/12/2025	ARK Investment Management LLC	1,953,772	$17.12M	0.1%	-26.2%	5.448%
11/12/2025	Dimensional Fund Advisors LP	324,788	$2.84M	0.0%	-10.5%	0.906%
11/12/2025	Cresset Asset Management LLC	16,100	$0.14M	0.0%	+37.1%	0.045%
11/12/2025	First Eagle Investment Management LLC	603,962	$5.29M	0.0%	+125.9%	1.684%
11/12/2025	Mitsubishi UFJ Asset Management Co. Ltd.	202,175	$1.77M	0.0%	-4.9%	0.564%
11/12/2025	Intech Investment Management LLC	13,236	$0.12M	0.0%	-23.0%	0.037%
11/10/2025	AXQ Capital LP	13,045	$0.11M	0.0%	N/A	0.036%
11/7/2025	Cassaday & Co Wealth Management LLC	71,629	$0.63M	0.0%	N/A	0.200%
11/7/2025	Vanguard Group Inc.	1,421,732	$12.45M	0.0%	-0.7%	3.965%
11/7/2025	JPMorgan Chase & Co.	11,238	$98K	0.0%	-15.2%	0.031%
11/6/2025	Essex Investment Management Co. LLC	493,949	$4.33M	0.7%	+3.5%	1.377%
11/5/2025	IQ EQ FUND MANAGEMENT IRELAND Ltd	52,787	$0.46M	0.0%	+38.2%	0.147%
10/30/2025	Strs Ohio	12,900	$0.11M	0.0%	N/A	0.036%
10/28/2025	Campbell & CO Investment Adviser LLC	66,481	$0.58M	0.0%	-38.8%	0.185%
10/27/2025	Sumitomo Mitsui Trust Group Inc.	318,350	$2.79M	0.0%	-20.1%	0.888%
10/23/2025	SG Americas Securities LLC	17,651	$0.16M	0.0%	-26.0%	0.049%
10/14/2025	Farther Finance Advisors LLC	3,233	$28K	0.0%	N/A	0.009%
10/6/2025	Old Port Advisors	38,629	$0.34M	0.1%	-47.5%	0.108%
8/16/2025	Nikko Asset Management Americas Inc.	394,375	$2.81M	0.0%	-4.4%	1.100%
8/15/2025	Manatuck Hill Partners LLC	80,000	$0.57M	0.2%	N/A	0.223%
8/15/2025	BNP Paribas Financial Markets	21,290	$0.15M	0.0%	-12.1%	0.059%
8/15/2025	Bank of America Corp DE	363,217	$2.59M	0.0%	+221.7%	1.013%
8/14/2025	First Light Asset Management LLC	1,067,613	$7.61M	1.0%	-37.2%	2.977%
8/14/2025	Jane Street Group LLC	47,850	$0.34M	0.0%	N/A	0.133%
8/14/2025	Raymond James Financial Inc.	6,666	$48K	0.0%	N/A	0.019%
8/14/2025	The Manufacturers Life Insurance Company	10,869	$77K	0.0%	N/A	0.030%
8/14/2025	Daiwa Securities Group Inc.	8,490	$61K	0.0%	N/A	0.024%
8/13/2025	Marshall Wace LLP	648,796	$4.63M	0.0%	+359.4%	1.809%
8/13/2025	Walleye Capital LLC	11,504	$82K	0.0%	N/A	0.032%
8/13/2025	Invesco Ltd.	92,896	$0.66M	0.0%	-85.7%	0.259%
8/13/2025	GM Advisory Group LLC	1,165,291	$8.31M	0.4%	N/A	3.250%
8/12/2025	American Century Companies Inc.	56,296	$0.40M	0.0%	+22.9%	0.157%
8/12/2025	Rhumbline Advisers	36,416	$0.26M	0.0%	+5.5%	0.102%
8/12/2025	Dynamic Technology Lab Private Ltd	18,537	$0.13M	0.0%	N/A	0.052%
8/12/2025	Catalyst Funds Management Pty Ltd	11,400	$81K	0.0%	N/A	0.032%
8/8/2025	Intech Investment Management LLC	17,187	$0.12M	0.0%	N/A	0.048%
8/8/2025	Geode Capital Management LLC	658,603	$4.70M	0.0%	+11.7%	1.837%
8/7/2025	49 Wealth Management LLC	19,188	$0.14M	0.0%	-58.0%	0.054%
8/7/2025	Campbell & CO Investment Adviser LLC	108,689	$0.78M	0.0%	N/A	0.303%
8/7/2025	Mitsubishi UFJ Asset Management Co. Ltd.	212,514	$1.52M	0.0%	N/A	0.593%
8/6/2025	First Eagle Investment Management LLC	267,378	$1.91M	0.0%	N/A	0.746%
8/5/2025	ANTIPODES PARTNERS Ltd	6,558	$47K	0.0%	+49.7%	0.018%
8/1/2025	IQ EQ FUND MANAGEMENT IRELAND Ltd	38,186	$0.27M	0.0%	+67.0%	0.106%
7/31/2025	Nisa Investment Advisors LLC	3,784	$27K	0.0%	+453.2%	0.011%
7/31/2025	Sumitomo Mitsui Trust Group Inc.	398,256	$2.84M	0.0%	-3.5%	1.111%
7/30/2025	ARK Investment Management LLC	2,648,278	$18.88M	0.1%	-8.7%	7.385%
7/16/2025	Old Port Advisors	73,629	$0.53M	0.1%	N/A	0.205%
6/27/2025	Goldman Sachs Group Inc.	74,656	$0.33M	0.0%	-71.7%	0.208%
5/29/2025	Rhumbline Advisers	34,522	$0.16M	0.0%	-4.8%	0.096%
5/16/2025	Goldman Sachs Group Inc.	74,656	$0.33M	0.0%	-71.7%	0.209%
5/16/2025	AQR Capital Management LLC	81,558	$0.37M	0.0%	N/A	0.228%
5/16/2025	AWM Investment Company Inc.	5,199,924	$23.30M	3.2%	+210.6%	14.549%
5/15/2025	First Light Asset Management LLC	1,701,095	$7.62M	0.9%	N/A	4.760%
5/15/2025	PDT Partners LLC	41,600	$0.19M	0.0%	N/A	0.116%
5/13/2025	American Century Companies Inc.	45,814	$0.21M	0.0%	+10.8%	0.128%
5/12/2025	Nuveen LLC	106,951	$0.48M	0.0%	N/A	0.299%
5/12/2025	Invesco Ltd.	649,630	$2.91M	0.0%	N/A	1.818%
5/9/2025	Deutsche Bank AG	20,670	$93K	0.0%	-79.2%	0.058%
5/9/2025	Charles Schwab Investment Management Inc.	212,230	$0.95M	0.0%	+5.2%	0.594%
5/9/2025	IQ EQ FUND MANAGEMENT IRELAND Ltd	22,862	$0.10M	0.0%	+115.6%	0.064%
5/8/2025	XTX Topco Ltd	38,208	$0.17M	0.0%	-26.8%	0.107%
5/7/2025	Essex Investment Management Co. LLC	480,549	$2.15M	0.4%	N/A	1.345%
5/7/2025	ARK Investment Management LLC	2,899,347	$12.99M	0.1%	+4.0%	8.112%
5/7/2025	Nikko Asset Management Americas Inc.	412,574	$1.83M	0.0%	-11.7%	1.154%
5/7/2025	Prescott Group Capital Management L.L.C.	190,005	$0.85M	0.1%	+26.7%	0.532%
5/6/2025	Legato Capital Management LLC	142,442	$0.64M	0.1%	N/A	0.399%
5/1/2025	CWM LLC	6,963	$31K	0.0%	+541.2%	0.020%
4/30/2025	49 Wealth Management LLC	45,738	$0.21M	0.0%	-7.9%	0.129%
4/29/2025	Bank of New York Mellon Corp	51,915	$0.23M	0.0%	+4.0%	0.147%
4/25/2025	Sumitomo Mitsui Trust Group Inc.	412,574	$1.85M	0.0%	-11.7%	1.168%
4/22/2025	Cambridge Investment Research Advisors Inc.	10,000	$45K	0.0%	N/A	0.028%
4/17/2025	FNY Investment Advisers LLC	75,489	$0.34M	0.2%	N/A	0.214%
2/18/2025	49 Wealth Management LLC	49,670	$0.11M	0.0%	+59.7%	0.143%
2/18/2025	AWM Investment Company Inc.	1,673,924	$3.68M	0.4%	+6.3%	4.807%
2/17/2025	Two Sigma Investments LP	19,000	$42K	0.0%	N/A	0.055%
2/17/2025	Two Sigma Advisers LP	13,500	$30K	0.0%	N/A	0.039%
2/17/2025	Nuveen Asset Management LLC	106,951	$0.24M	0.0%	-47.7%	0.307%
2/17/2025	Occudo Quantitative Strategies LP	16,376	$36K	0.0%	N/A	0.047%
2/17/2025	Needham Investment Management LLC	200,000	$0.44M	0.0%	+100.0%	0.574%
2/17/2025	Millennium Management LLC	116,358	$0.26M	0.0%	-11.5%	0.334%
2/17/2025	Granahan Investment Management LLC	522,786	$1.15M	0.0%	-39.3%	1.501%
2/17/2025	Deutsche Bank AG	99,239	$0.22M	0.0%	+1,159.4%	0.285%
2/17/2025	D. E. Shaw & Co. Inc.	85,860	$0.19M	0.0%	+49.1%	0.247%

Data available starting January 2016

908 Devices Inc., a commercial-stage technology company, provides various purpose-built handheld and desktop mass spectrometry devices to interrogate unknown and invisible materials in life sciences research, bioprocessing, pharma/biopharma, forensics, and adjacent markets. The company's products include MX908, a handheld, battery-powered, and Mass Spec device that is designed for rapid analysis of solid, liquid, vapor, and aerosol materials of unknown identity; Rebel, a small desktop analyzer that provides real-time information on the extracellular environment in bioprocesses; and Maverick, an optical in-line analyzer that offers real-time monitoring and control of multiple bioprocess parameters, including glucose, lactate, and total biomass in mammalian cell cultures, as well as provides process fingerprint data to support large-scale efforts in predictive bioprocess modeling. Its products also comprise Maven and Trace C2, an online device for bioprocess monitoring and control; and ZipChip solution, a plug-and-play, high-resolution separation platform that optimizes Mass Spec sample analysis. The company operates in the United States, Europe, the Middle East, Africa, the Asia Pacific, and rest of the Americas. 908 Devices Inc. was incorporated in 2012 and is headquartered in Boston, Massachusetts.

Today's Range

Now: $6.65

$6.01

$6.65

50 Day Range

MA: $7.46

$5.35

$9.15

52 Week Range

Now: $6.65

$1.81

$9.34

Volume

340,398 shs

Average Volume

411,201 shs

Market Capitalization

$240.66 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.47

Who are the company insiders with the largest holdings of 908 Devices?: 908 Devices' top insider investors include:
Christopher D Brown (Insider)
Kevin J Knopp (CEO)
Joseph H Iv Griffith (CFO)
Mark Spoto (Director)
Michael S Turner (Insider)
Michael S Turner (Insider)
Learn More about top insider investors at 908 Devices.
Who are the major institutional investors of 908 Devices?: 908 Devices' top institutional investors include:
First Light Asset Management LLC — 6.94%
ARK Investment Management LLC — 5.45%
Vanguard Group Inc. — 3.96%
GM Advisory Group LLC — 1.87%
First Eagle Investment Management LLC — 1.68%
Essex Investment Management Co. LLC — 1.38%
Learn More about top institutional investors of 908 Devices stock.
Which institutional investors are selling 908 Devices stock?: During the previous quarter, MASS stock was sold by these institutional investors:
ARK Investment Management LLC
GM Advisory Group LLC
Schonfeld Strategic Advisors LLC
Bank of America Corp DE
Sumitomo Mitsui Trust Group Inc.
Amova Asset Management Americas Inc.
Millennium Management LLC
Campbell & CO Investment Adviser LLC
In the last year, company insiders that have sold 908 Devices company stock include:
Christopher D Brown (Insider)
Kevin J Knopp (CEO)
Joseph H Iv Griffith (CFO)
Learn More investors selling 908 Devices stock.
Which institutional investors are buying 908 Devices stock?: During the last quarter, MASS stock was acquired by institutional investors including:
First Light Asset Management LLC
First Eagle Investment Management LLC
Raymond James Financial Inc.
Squarepoint Ops LLC
Cassaday & Co Wealth Management LLC
Brooklyn Investment Group
Granahan Investment Management LLC
FourThought Financial Partners LLC
During the last year, these company insiders have bought 908 Devices stock:
Christopher D Brown (Insider)
Kevin J Knopp (CEO)
Learn More investors buying 908 Devices stock.