908 Devices (MASS) insider trading activity: Get Latest News Today

MASS Stock Outstanding Shares

Making an investment decision in the stock market involves a certain amount of risk, so it's important to thoroughly review a company's stock before making any decisions. Stock float, number of short positions and outstanding shares are among the many factors an investor should take into account.

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares5.51

Short Percent Of Float8.75

Shares Outstanding34.82M

Shares Float26.41M

Shares Short1.92M

Short Ratio1.79

8.75%

Short % of Float

5.51%

Short % of Shares Outstanding

Market Insider MASS

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

8.2% Percentage of Shares held by All Insiders

67.79% Percentage of Shares held by All Institutions

73.84% Percentage of Float held by Institutions

124

Number of Institutions Holding Shares

Institutional Ownership

About 67.79% of MASS shares are held by financial institutions. VALUES FIRST ADVISORS, INC. is the top corporate investor, holding 12.58K shares valued at $94.94K. A 0.04% stake in 908 Devices Inc. is owned by the company. GRANAHAN INVESTMENT MANAGEMENT, LLC owns 1.73M shares valued at $13.09M, which translates its holding of 5.35% of the stake in the company.

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
2024-03-31	VALUES FIRST ADVISORS, INC.	0.04%	12.58K	94.94K	-4.43K	-26.04%
2024-03-31	GRANAHAN INVESTMENT MANAGEMENT, LLC	5.35%	1.73M	13.09M	-304.29K	-14.93%
2024-03-31	EVENTIDE ASSET MANAGEMENT, LLC	4.41%	1.43M	10.8M	0	0
2024-03-31	PLATINUM INVESTMENT MANAGEMENT LTD	1.15%	372.3K	2.81M	-409.57K	-52.38%
2024-03-31	SANDS CAPITAL VENTURES, LLC	0.73%	237.26K	1.79M	0	0
2024-03-31	RENAISSANCE TECHNOLOGIES LLC	0.34%	109K	823K	12.1K	+12.49%
2024-03-31	PRIMECAP MANAGEMENT CO/CA/	0.08%	26.87K	202.87K	0	0
2024-03-31	ZURCHER KANTONALBANK (ZURICH CANTONALBANK)	0.01%	3.64K	27.48K	-279	-7.12%
2024-03-31	SIGNATUREFD, LLC	0.01%	2.5K	18.88K	0	0
2024-03-31	NISA INVESTMENT ADVISORS, LLC	0.01%	2.44K	18.4K	25	+1.04%
2024-03-31	LEGAL & GENERAL GROUP PLC	0.01%	1.82K	13.72M	0	0
2024-03-31	FMR LLC	0%	1.45K	10.92K	108	+8.07%
2024-03-31	AMERITAS INVESTMENT PARTNERS, INC.	0%	1.44K	10.89M	0	0
2024-03-31	METROPOLITAN LIFE INSURANCE CO/NY	0%	1.44K	10.87K	0	0
2024-03-31	AMALGAMATED BANK	0%	766	6K	-994	-56.48%
2024-03-31	GPS WEALTH STRATEGIES GROUP, LLC	0%	275	2.08K	0	0
2024-03-31	NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC	0%	5	37	5	+100.00%
2024-03-31	VANGUARD GROUP INC	5.4%	1.75M	13.22M	6.77K	+0.39%
2024-03-31	BLACKROCK INC.	5.34%	1.73M	13.09M	-53.63K	-3.00%
2024-03-31	TAO CAPITAL MANAGEMENT LP	1.75%	568.98K	4.3M	0	0
2024-03-31	SUMITOMO MITSUI TRUST HOLDINGS, INC.	1.73%	562.29K	4.25M	-19.74K	-3.39%
2024-03-31	NIKKO ASSET MANAGEMENT AMERICAS, INC.	1.73%	562.29K	4.23M	-19.74K	-3.39%
2024-03-31	IRON TRIANGLE PARTNERS LP	3.21%	1.04M	7.86M	-244.18K	-19.00%
2024-03-31	FRED ALGER MANAGEMENT, LLC	3.13%	1.02M	7.67M	-194.02K	-16.03%
2024-03-31	AWM INVESTMENT COMPANY, INC.	2.06%	668.53K	5.05M	15.06K	+2.30%
2024-03-31	GEODE CAPITAL MANAGEMENT, LLC	1.63%	527.26K	3.98M	8.67K	+1.67%
2024-03-31	MILLENNIUM MANAGEMENT LLC	1.41%	456.39K	3.45M	431.91K	+1,764.48%
2024-03-31	STATE STREET CORP	1.34%	436.04K	3.29M	28.73K	+7.05%
2024-03-31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.6%	193.88K	1.46M	13.22K	+7.32%
2024-03-31	NORTHERN TRUST CORP	0.56%	183.03K	1.38M	2.1K	+1.16%
2024-03-31	DIMENSIONAL FUND ADVISORS LP	0.4%	130.19K	982.93K	19.23K	+17.34%
2024-03-31	NUVEEN ASSET MANAGEMENT, LLC	0.31%	101.64K	767.35K	0	0
2024-03-31	NEW YORK STATE COMMON RETIREMENT FUND	0.24%	76.68K	579K	2.65K	+3.58%
2024-03-31	BRUCE & CO., INC.	0.21%	68.29K	515.56K	0	0
2024-03-31	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.2%	65.5K	494.53K	0	0
2024-03-31	BANK OF NEW YORK MELLON CORP	0.2%	65.34K	493.3K	-26.86K	-29.13%
2024-03-31	LPL FINANCIAL LLC	0.16%	51.21K	386.61K	-1.25K	-2.38%
2024-03-31	RHUMBLINE ADVISERS	0.12%	38.07K	287.42K	1.04K	+2.81%
2024-03-31	MORGAN STANLEY	0.12%	38.01K	286.98K	-32.31K	-45.95%
2024-03-31	JANE STREET GROUP, LLC	0.11%	36.2K	273.27K	22.7K	+168.11%
2024-03-31	ENVESTNET ASSET MANAGEMENT INC	0.09%	29.99K	226.45K	1.06K	+3.67%
2024-03-31	ARETE WEALTH ADVISORS, LLC	0.09%	29.53K	222.96K	1.57K	+5.63%
2024-03-31	AMERICAN CENTURY COMPANIES INC	0.09%	28.42K	214.59K	8.45K	+42.31%
2024-03-31	ALLIANCEBERNSTEIN L.P.	0.08%	26.03K	196.53K	0	0
2024-03-31	49 WEALTH MANAGEMENT, LLC	0.08%	25.77K	177.82K	-490	-1.87%
2024-03-31	PEAK6 INVESTMENTS LLC	0.05%	16.5K	124.61K	16.5K	+100.00%
2024-03-31	THRIVENT FINANCIAL FOR LUTHERANS	0.07%	23.47K	177K	0	0
2024-03-31	HARBOR CAPITAL ADVISORS, INC.	0.07%	22.75K	172K	22.75K	+100.00%
2024-03-31	UBS GROUP AG	0.06%	20.43K	154.22K	-2.32K	-10.19%
2024-03-31	POINT72 ASSET MANAGEMENT, L.P.	0.06%	18.9K	142.7K	-1.3K	-6.44%
2024-03-31	CORTON CAPITAL INC.	0.05%	16.77K	126.61K	16.77K	+100.00%
2024-03-31	GOLDMAN SACHS GROUP INC	0.05%	16.12K	121.69K	-12.16K	-43.00%
2024-03-31	BARCLAYS PLC	0.05%	15.57K	117K	-14.55K	-48.30%
2024-03-31	BANK OF AMERICA CORP /DE/	0.05%	14.71K	111.05K	-30.56K	-67.51%
2024-03-31	CITADEL ADVISORS LLC	0.05%	14.7K	110.99K	1.7K	+13.08%
2024-03-31	AMERIPRISE FINANCIAL INC	5.82%	1.89M	14.26M	-1.49K	-0.08%
2024-03-31	ARK INVESTMENT MANAGEMENT LLC	12.48%	4.05M	30.57M	-297.64K	-6.85%
2024-03-31	METLIFE INVESTMENT MANAGEMENT, LLC	0.04%	11.99K	90.53K	0	0
2024-03-31	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.03%	11.18K	87.95K	0	0
2024-03-31	AMERICAN INTERNATIONAL GROUP, INC.	0.03%	10.92K	82.45K	19	+0.17%
2024-03-31	US BANCORP \DE\	0.03%	10.74K	81.06K	132	+1.24%
2024-03-31	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	0.03%	10.55K	90.71K	10.55K	+100.00%
2024-03-31	WELLS FARGO & COMPANY/MN	0.03%	9.38K	70.78K	1.11K	+13.44%
2024-03-31	JPMORGAN CHASE & CO	0.03%	9.22K	69.62K	-5.32K	-36.59%
2024-03-31	ALLWORTH FINANCIAL LP	0.02%	5.27K	39.78K	0	0
2024-03-31	CITIGROUP INC	0.01%	4.17K	31.51K	1.02K	+32.17%
2023-12-31	ARK INVESTMENT MANAGEMENT LLC	13.44%	4.35M	48.77M	333.12K	+8.30%
2023-12-31	GRANAHAN INVESTMENT MANAGEMENT, LLC	6.3%	2.04M	22.87M	195.37K	+10.60%
2023-12-31	AMERIPRISE FINANCIAL INC	5.84%	1.89M	21.2M	13.3K	+0.71%
2023-12-31	BLACKROCK INC.	5.52%	1.79M	20.05M	92.06K	+5.43%
2023-12-31	VANGUARD GROUP INC	5.39%	1.74M	19.57M	33.04K	+1.93%
2023-12-31	EVENTIDE ASSET MANAGEMENT, LLC	4.42%	1.43M	16.06M	0	0
2023-12-31	IRON TRIANGLE PARTNERS LP	3.97%	1.28M	14.42M	304.48K	+31.06%
2023-12-31	FRED ALGER MANAGEMENT, LLC	3.74%	1.21M	13.58M	-121.12K	-9.10%
2023-12-31	PLATINUM INVESTMENT MANAGEMENT LTD	2.42%	781.87K	8.77M	-52.95K	-6.34%
2023-12-31	AWM INVESTMENT COMPANY, INC.	2.02%	653.47K	7.33M	91.96K	+16.38%
2023-12-31	NIKKO ASSET MANAGEMENT AMERICAS, INC.	1.8%	582.03K	6.54M	-47.96K	-7.61%
2023-12-31	SUMITOMO MITSUI TRUST HOLDINGS, INC.	1.8%	582.03K	6.53M	-47.96K	-7.61%
2023-12-31	TAO CAPITAL MANAGEMENT LP	1.76%	568.98K	6.38M	0	0
2023-12-31	JPMORGAN CHASE & CO	0.05%	14.54K	163.16K	291	+2.04%
2023-12-31	GEODE CAPITAL MANAGEMENT, LLC	1.6%	518.59K	5.82M	37.82K	+7.87%
2023-12-31	STATE STREET CORP	1.26%	407.31K	4.57M	-226.19K	-35.70%
2023-12-31	SANDS CAPITAL VENTURES, LLC	0.73%	237.26K	2.66M	0	0
2023-12-31	NORTHERN TRUST CORP	0.56%	180.93K	2.03M	-4.02K	-2.17%
2023-12-31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.56%	180.66K	2.03M	10.96K	+6.46%
2023-12-31	DIMENSIONAL FUND ADVISORS LP	0.34%	110.96K	1.24M	89.56K	+418.55%
2023-12-31	NUVEEN ASSET MANAGEMENT, LLC	0.31%	101.64K	1.14M	7.42K	+7.88%
2023-12-31	TANG CAPITAL MANAGEMENT LLC	0.31%	100K	1.12M	0	0
2023-12-31	RENAISSANCE TECHNOLOGIES LLC	0.3%	96.9K	1.09M	12.2K	+14.40%
2023-12-31	BANK OF NEW YORK MELLON CORP	0.28%	92.2K	1.03M	-1.58K	-1.68%
2023-12-31	NEW YORK STATE COMMON RETIREMENT FUND	0.23%	74.03K	831K	3.51K	+4.97%
2023-12-31	MORGAN STANLEY	0.22%	70.33K	789.05K	28.51K	+68.19%
2023-12-31	BRUCE & CO., INC.	0.21%	68.29K	766.17K	0	0
2023-12-31	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.2%	65.5K	734.91K	-10.8K	-14.15%
2023-12-31	CITADEL ADVISORS LLC	0.17%	53.86K	604.34K	19.11K	+54.98%
2023-12-31	LPL FINANCIAL LLC	0.16%	52.46K	588.56K	9.35K	+21.69%
2023-12-31	BANK OF AMERICA CORP /DE/	0.14%	45.27K	507.94K	24.22K	+115.09%
2023-12-31	RHUMBLINE ADVISERS	0.11%	37.03K	415.46K	4.05K	+12.28%
2023-12-31	PEAK6 INVESTMENTS LLC	0.08%	24.8K	278.26K	24.8K	+100.00%
2023-12-31	BARCLAYS PLC	0.09%	30.11K	338K	26.27K	+683.78%
2023-12-31	ENVESTNET ASSET MANAGEMENT INC	0.09%	28.93K	324.62K	4.99K	+20.83%
2023-12-31	GOLDMAN SACHS GROUP INC	0.09%	28.28K	317.29K	3.92K	+16.08%
2023-12-31	ARETE WEALTH ADVISORS, LLC	0.09%	27.96K	313.69K	5.2K	+22.85%
2023-12-31	PRIMECAP MANAGEMENT CO/CA/	0.08%	26.87K	301.48K	0	0
2023-12-31	ALLIANCEBERNSTEIN L.P.	0.08%	26.03K	292.06K	1.69K	+6.94%
2023-12-31	TOWER RESEARCH CAPITAL LLC (TRC)	0.08%	25.03K	280.8K	10.07K	+67.27%
2023-12-31	MILLENNIUM MANAGEMENT LLC	0.08%	24.48K	274.64K	8.1K	+49.47%
2023-12-31	HRT FINANCIAL LP	0.07%	24.02K	269K	10.5K	+77.63%
2023-12-31	THRIVENT FINANCIAL FOR LUTHERANS	0.07%	23.47K	263K	0	0
2023-12-31	UBS GROUP AG	0.07%	22.74K	255.19K	10.29K	+82.62%
2023-12-31	CAMPBELL & CO INVESTMENT ADVISER LLC	0.07%	22.22K	249.35K	22.22K	+100.00%
2023-12-31	POINT72 ASSET MANAGEMENT, L.P.	0.06%	20.2K	226.64K	20.2K	+100.00%
2023-12-31	AMERICAN CENTURY COMPANIES INC	0.06%	19.97K	224.1K	6.97K	+53.56%
2023-12-31	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	17.83K	200.1K	-8K	-30.97%
2023-12-31	VALUES FIRST ADVISORS, INC.	0.05%	17K	190.77K	277	+1.66%

MASS Insiders

Among the MASS insiders holding of 8.2% of the stake in company, BROWN CHRISTOPHER D., Chief Product Officer, holds the largest shares of 962.12K. KNOPP KEVIN J., President and CEO, is the second largest MASS insider with ownership of 692.73K shares. GRIFFITH JOSEPH H. IV, Chief Financial Officer, stands third with possession of 109.87K shares of that stake.

Insiders	Designation	Shares Held
BROWN CHRISTOPHER D.	Chief Product Officer	962.12K
KNOPP KEVIN J.	President and CEO	692.73K
GRIFFITH JOSEPH H. IV	Chief Financial Officer	109.87K
BASARSKY TRENT A.	VP, Corporate Development	75.2K
SPOTO MARK	director	40.42K
TURNER MICHAEL S.	Chief Legal & Admin Officer	24.6K
FITZPATRICK MAURA	VP, Product Management & Mktg	2.83K
KENNEWEG JOHN	Vice President, Government	0

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
2025-02-03	GRIFFITH JOSEPH H. IV	SALE	2.35	4.32K	10.17K	109.87K
2025-02-03	BROWN CHRISTOPHER D.	SALE	2.33	3.64K	8.5K	962.12K
2025-02-03	KNOPP KEVIN J.	SALE	2.32	6.52K	15.12K	692.73K
2025-02-03	TURNER MICHAEL S.	SALE	2.32	4.16K	9.65K	24.6K
2024-05-13	KNOPP KEVIN J.	PURCHASE	6.42	10K	64.2K	508.98K
2024-05-10	KNOPP KEVIN J.	PURCHASE	5.77	10K	57.7K	498.98K
2024-05-09	KNOPP KEVIN J.	PURCHASE	5.83	10K	58.3K	488.98K
2024-05-08	KNOPP KEVIN J.	PURCHASE	5.72	10K	57.2K	478.98K
2024-05-07	KNOPP KEVIN J.	PURCHASE	5.60	10K	56K	468.98K
2024-02-02	GRIFFITH JOSEPH H. IV	SALE	7.09	9.71K	68.87K	80K
2024-02-01	KNOPP KEVIN J.	SALE	7.02	4.97K	34.88K	411.98K
2024-02-01	BROWN CHRISTOPHER D.	SALE	7.02	2.36K	16.55K	886.39K
2024-02-01	TURNER MICHAEL S.	SALE	6.97	3.62K	25.2K	9.11K
2024-02-01	GRIFFITH JOSEPH H. IV	SALE	7.00	3.81K	26.68K	89.71K
2023-12-28	GRIFFITH JOSEPH H. IV	SALE	12.08	6K	72.48K	80K
2023-12-21	BROWN CHRISTOPHER D.	SALE	9.12	7.37K	67.21K	877.91K
2023-12-20	BROWN CHRISTOPHER D.	SALE	9.10	5.24K	47.64K	885.28K
2023-12-19	BROWN CHRISTOPHER D.	SALE	9.08	1.31K	11.85K	890.51K
2023-12-19	GRIFFITH JOSEPH H. IV	SALE	9.08	5.58K	50.67K	86K
2023-06-07	BROWN CHRISTOPHER D.	SALE	10.03	4.47K	44.83K	897.91K
2023-05-23	KNOPP KEVIN J.	SALE	10.12	60K	607.2K	367.85K
2023-05-23	BROWN CHRISTOPHER D.	SALE	10.02	10K	100.2K	892.38K
2023-02-16	KNOPP KEVIN J.	SALE	10.12	4.84K	49K	427.85K
2023-02-15	KNOPP KEVIN J.	SALE	10.29	15.16K	155.98K	432.69K
2023-02-02	BROWN CHRISTOPHER D.	SALE	10.03	10K	100.3K	902.38K
2023-02-02	GRIFFITH JOSEPH H. IV	SALE	10.03	3.27K	32.76K	91.58K
2023-02-02	KNOPP KEVIN J.	SALE	10.51	40K	420.4K	447.85K
2023-02-02	TURNER MICHAEL S.	SALE	10.02	2.85K	28.54K	0
2023-02-01	KNOPP KEVIN J.	SALE	9.36	4.05K	37.9K	487.85K
2023-02-01	FITZPATRICK MAURA	SALE	9.20	1.59K	14.66K	2.83K
2023-02-01	TURNER MICHAEL S.	SALE	9.17	1.58K	14.48K	2.85K
2023-02-01	GRIFFITH JOSEPH H. IV	SALE	9.17	1.84K	16.84K	94.85K
2023-02-01	BROWN CHRISTOPHER D.	SALE	9.17	1.56K	14.34K	912.38K
2022-11-22	SPOTO MARK	PURCHASE	9.65	2.59K	24.95K	40.42K
2022-11-15	KNOPP KEVIN J.	SALE	12.40	1.01K	12.56K	480.64K
2022-10-18	KNOPP KEVIN J.	SALE	15.32	18.8K	288.02K	500.64K
2022-10-17	KNOPP KEVIN J.	SALE	14.68	11.2K	164.42K	519.44K
2022-08-17	TURNER MICHAEL S.	SALE	18.15	5K	90.75K	0
2022-08-15	KNOPP KEVIN J.	SALE	19.23	27.63K	531.27K	563.02K
2022-08-05	KNOPP KEVIN J.	SALE	25.32	25.91K	656.04K	590.93K
2022-08-03	GRIFFITH JOSEPH H. IV	SALE	24.39	12.73K	310.56K	91.58K
2022-08-02	TURNER MICHAEL S.	SALE	23.96	10K	239.6K	0
2022-07-28	KNOPP KEVIN J.	SALE	22.46	14.65K	328.97K	616.84K
2022-07-21	KNOPP KEVIN J.	SALE	22.04	200	4.41K	655.19K
2022-07-15	KNOPP KEVIN J.	SALE	17.74	18.23K	323.42K	655.39K
2022-07-06	BROWN CHRISTOPHER D.	SALE	21.04	6.8K	143.07K	932.11K
2022-07-06	KNOPP KEVIN J.	SALE	22.07	1K	22.07K	685.84K
2022-06-29	TURNER MICHAEL S.	SALE	20.03	5K	100.15K	0
2022-06-29	BROWN CHRISTOPHER D.	SALE	20.22	16.47K	333.04K	942.61K
2022-06-24	GRIFFITH JOSEPH H. IV	SALE	19.13	13.13K	251.16K	91.58K
2022-06-23	TURNER MICHAEL S.	SALE	17.90	10K	179K	5K
2022-06-21	KNOPP KEVIN J.	SALE	15.07	9.2K	138.64K	686.84K
2022-06-17	GRIFFITH JOSEPH H. IV	SALE	15.06	8.1K	121.99K	91.58K
2022-06-15	GRIFFITH JOSEPH H. IV	SALE	15.02	1K	15.02K	91.58K
2022-06-15	KNOPP KEVIN J.	SALE	14.62	18.8K	274.86K	698.04K
2022-06-13	GRIFFITH JOSEPH H. IV	SALE	13.54	13.33K	180.54K	91.58K
2022-04-12	KENNEWEG JOHN	SALE	20.07	9.88K	198.29K	0
2022-04-12	BROWN CHRISTOPHER D.	SALE	20.06	9.83K	197.17K	959.08K
2022-04-11	BASARSKY TRENT A.	SALE	19.73	14.8K	292K	75.2K
2022-03-18	BROWN CHRISTOPHER D.	SALE	20.06	19.9K	399.19K	968.91K
2022-03-18	KENNEWEG JOHN	SALE	20.06	19.88K	398.81K	0
2022-03-14	BASARSKY TRENT A.	SALE	17.19	8.24K	141.59K	66.76K
2022-03-11	BROWN CHRISTOPHER D.	SALE	20.00	100	2K	988.81K
2022-03-11	KENNEWEG JOHN	SALE	20.00	119	2.38K	0
2022-02-15	BASARSKY TRENT A.	SALE	15.20	9.29K	141.24K	45K
2022-02-14	BASARSKY TRENT A.	SALE	15.14	5.71K	86.42K	45K
2022-01-12	BASARSKY TRENT A.	SALE	20.32	2K	40.64K	45K
2022-01-11	KENNEWEG JOHN	SALE	20.15	9.3K	187.4K	0
2022-01-10	KENNEWEG JOHN	SALE	20.04	700	14.03K	0
2022-01-05	BROWN CHRISTOPHER D.	SALE	24.05	6.71K	161.47K	988.91K
2021-12-01	BROWN CHRISTOPHER D.	SALE	24.29	1.23K	29.88K	998.91K
2021-11-16	KENNEWEG JOHN	SALE	31.10	502	15.61K	0
2021-11-05	GRIFFITH JOSEPH H. IV	SALE	39.08	2.8K	109.42K	88.78K
2021-11-03	BROWN CHRISTOPHER D.	SALE	33.24	3.43K	113.88K	1.01M
2021-11-01	KNOPP KEVIN J.	SALE	35.27	8.33K	293.73K	716.84K
2021-10-18	KENNEWEG JOHN	SALE	32.22	10K	322.2K	0
2021-10-06	BROWN CHRISTOPHER D.	SALE	33.33	1.58K	52.66K	1.02M
2021-10-01	KNOPP KEVIN J.	SALE	34.93	5.47K	191.14K	736.84K
2021-09-23	BASARSKY TRENT A.	SALE	38.04	3.87K	147.29K	29K
2021-09-16	KENNEWEG JOHN	SALE	36.61	10K	366.1K	0
2021-09-09	TURNER MICHAEL S.	SALE	37.05	6.9K	255.5K	5K
2021-09-08	GRIFFITH JOSEPH H. IV	SALE	37.30	23.94K	892.96K	106.74K
2021-09-01	KNOPP KEVIN J.	SALE	35.40	5.6K	198.2K	771.24K

Insider Transaction Summary (6 Months)

SHARESTRANS

PURCHASE00

SALES18.65K4

NET SHARES-18.65K4

NO. OF SHARES HELD1.79M4

% NET SHARES-101.04%0%

Frequently Asked Questions

MASS Stock Outstanding Shares

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares5.51

Short Percent Of Float8.75

Shares Outstanding34.82M

Shares Float26.41M

Shares Short1.92M

Short Ratio1.79

8.75%

Short % of Float

5.51%

Short % of Shares Outstanding

Market Insider MASS

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

8.2% Percentage of Shares held by All Insiders

67.79% Percentage of Shares held by All Institutions

73.84% Percentage of Float held by Institutions

124

Number of Institutions Holding Shares

Institutional Ownership

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
2024-03-31	VALUES FIRST ADVISORS, INC.	0.04%	12.58K	94.94K	-4.43K	-26.04%
2024-03-31	GRANAHAN INVESTMENT MANAGEMENT, LLC	5.35%	1.73M	13.09M	-304.29K	-14.93%
2024-03-31	EVENTIDE ASSET MANAGEMENT, LLC	4.41%	1.43M	10.8M	0	0
2024-03-31	PLATINUM INVESTMENT MANAGEMENT LTD	1.15%	372.3K	2.81M	-409.57K	-52.38%
2024-03-31	SANDS CAPITAL VENTURES, LLC	0.73%	237.26K	1.79M	0	0
2024-03-31	RENAISSANCE TECHNOLOGIES LLC	0.34%	109K	823K	12.1K	+12.49%
2024-03-31	PRIMECAP MANAGEMENT CO/CA/	0.08%	26.87K	202.87K	0	0
2024-03-31	ZURCHER KANTONALBANK (ZURICH CANTONALBANK)	0.01%	3.64K	27.48K	-279	-7.12%
2024-03-31	SIGNATUREFD, LLC	0.01%	2.5K	18.88K	0	0
2024-03-31	NISA INVESTMENT ADVISORS, LLC	0.01%	2.44K	18.4K	25	+1.04%
2024-03-31	LEGAL & GENERAL GROUP PLC	0.01%	1.82K	13.72M	0	0
2024-03-31	FMR LLC	0%	1.45K	10.92K	108	+8.07%
2024-03-31	AMERITAS INVESTMENT PARTNERS, INC.	0%	1.44K	10.89M	0	0
2024-03-31	METROPOLITAN LIFE INSURANCE CO/NY	0%	1.44K	10.87K	0	0
2024-03-31	AMALGAMATED BANK	0%	766	6K	-994	-56.48%
2024-03-31	GPS WEALTH STRATEGIES GROUP, LLC	0%	275	2.08K	0	0
2024-03-31	NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC	0%	5	37	5	+100.00%
2024-03-31	VANGUARD GROUP INC	5.4%	1.75M	13.22M	6.77K	+0.39%
2024-03-31	BLACKROCK INC.	5.34%	1.73M	13.09M	-53.63K	-3.00%
2024-03-31	TAO CAPITAL MANAGEMENT LP	1.75%	568.98K	4.3M	0	0
2024-03-31	SUMITOMO MITSUI TRUST HOLDINGS, INC.	1.73%	562.29K	4.25M	-19.74K	-3.39%
2024-03-31	NIKKO ASSET MANAGEMENT AMERICAS, INC.	1.73%	562.29K	4.23M	-19.74K	-3.39%
2024-03-31	IRON TRIANGLE PARTNERS LP	3.21%	1.04M	7.86M	-244.18K	-19.00%
2024-03-31	FRED ALGER MANAGEMENT, LLC	3.13%	1.02M	7.67M	-194.02K	-16.03%
2024-03-31	AWM INVESTMENT COMPANY, INC.	2.06%	668.53K	5.05M	15.06K	+2.30%
2024-03-31	GEODE CAPITAL MANAGEMENT, LLC	1.63%	527.26K	3.98M	8.67K	+1.67%
2024-03-31	MILLENNIUM MANAGEMENT LLC	1.41%	456.39K	3.45M	431.91K	+1,764.48%
2024-03-31	STATE STREET CORP	1.34%	436.04K	3.29M	28.73K	+7.05%
2024-03-31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.6%	193.88K	1.46M	13.22K	+7.32%
2024-03-31	NORTHERN TRUST CORP	0.56%	183.03K	1.38M	2.1K	+1.16%
2024-03-31	DIMENSIONAL FUND ADVISORS LP	0.4%	130.19K	982.93K	19.23K	+17.34%
2024-03-31	NUVEEN ASSET MANAGEMENT, LLC	0.31%	101.64K	767.35K	0	0
2024-03-31	NEW YORK STATE COMMON RETIREMENT FUND	0.24%	76.68K	579K	2.65K	+3.58%
2024-03-31	BRUCE & CO., INC.	0.21%	68.29K	515.56K	0	0
2024-03-31	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.2%	65.5K	494.53K	0	0
2024-03-31	BANK OF NEW YORK MELLON CORP	0.2%	65.34K	493.3K	-26.86K	-29.13%
2024-03-31	LPL FINANCIAL LLC	0.16%	51.21K	386.61K	-1.25K	-2.38%
2024-03-31	RHUMBLINE ADVISERS	0.12%	38.07K	287.42K	1.04K	+2.81%
2024-03-31	MORGAN STANLEY	0.12%	38.01K	286.98K	-32.31K	-45.95%
2024-03-31	JANE STREET GROUP, LLC	0.11%	36.2K	273.27K	22.7K	+168.11%
2024-03-31	ENVESTNET ASSET MANAGEMENT INC	0.09%	29.99K	226.45K	1.06K	+3.67%
2024-03-31	ARETE WEALTH ADVISORS, LLC	0.09%	29.53K	222.96K	1.57K	+5.63%
2024-03-31	AMERICAN CENTURY COMPANIES INC	0.09%	28.42K	214.59K	8.45K	+42.31%
2024-03-31	ALLIANCEBERNSTEIN L.P.	0.08%	26.03K	196.53K	0	0
2024-03-31	49 WEALTH MANAGEMENT, LLC	0.08%	25.77K	177.82K	-490	-1.87%
2024-03-31	PEAK6 INVESTMENTS LLC	0.05%	16.5K	124.61K	16.5K	+100.00%
2024-03-31	THRIVENT FINANCIAL FOR LUTHERANS	0.07%	23.47K	177K	0	0
2024-03-31	HARBOR CAPITAL ADVISORS, INC.	0.07%	22.75K	172K	22.75K	+100.00%
2024-03-31	UBS GROUP AG	0.06%	20.43K	154.22K	-2.32K	-10.19%
2024-03-31	POINT72 ASSET MANAGEMENT, L.P.	0.06%	18.9K	142.7K	-1.3K	-6.44%
2024-03-31	CORTON CAPITAL INC.	0.05%	16.77K	126.61K	16.77K	+100.00%
2024-03-31	GOLDMAN SACHS GROUP INC	0.05%	16.12K	121.69K	-12.16K	-43.00%
2024-03-31	BARCLAYS PLC	0.05%	15.57K	117K	-14.55K	-48.30%
2024-03-31	BANK OF AMERICA CORP /DE/	0.05%	14.71K	111.05K	-30.56K	-67.51%
2024-03-31	CITADEL ADVISORS LLC	0.05%	14.7K	110.99K	1.7K	+13.08%
2024-03-31	AMERIPRISE FINANCIAL INC	5.82%	1.89M	14.26M	-1.49K	-0.08%
2024-03-31	ARK INVESTMENT MANAGEMENT LLC	12.48%	4.05M	30.57M	-297.64K	-6.85%
2024-03-31	METLIFE INVESTMENT MANAGEMENT, LLC	0.04%	11.99K	90.53K	0	0
2024-03-31	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.03%	11.18K	87.95K	0	0
2024-03-31	AMERICAN INTERNATIONAL GROUP, INC.	0.03%	10.92K	82.45K	19	+0.17%
2024-03-31	US BANCORP \DE\	0.03%	10.74K	81.06K	132	+1.24%
2024-03-31	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	0.03%	10.55K	90.71K	10.55K	+100.00%
2024-03-31	WELLS FARGO & COMPANY/MN	0.03%	9.38K	70.78K	1.11K	+13.44%
2024-03-31	JPMORGAN CHASE & CO	0.03%	9.22K	69.62K	-5.32K	-36.59%
2024-03-31	ALLWORTH FINANCIAL LP	0.02%	5.27K	39.78K	0	0
2024-03-31	CITIGROUP INC	0.01%	4.17K	31.51K	1.02K	+32.17%
2023-12-31	ARK INVESTMENT MANAGEMENT LLC	13.44%	4.35M	48.77M	333.12K	+8.30%
2023-12-31	GRANAHAN INVESTMENT MANAGEMENT, LLC	6.3%	2.04M	22.87M	195.37K	+10.60%
2023-12-31	AMERIPRISE FINANCIAL INC	5.84%	1.89M	21.2M	13.3K	+0.71%
2023-12-31	BLACKROCK INC.	5.52%	1.79M	20.05M	92.06K	+5.43%
2023-12-31	VANGUARD GROUP INC	5.39%	1.74M	19.57M	33.04K	+1.93%
2023-12-31	EVENTIDE ASSET MANAGEMENT, LLC	4.42%	1.43M	16.06M	0	0
2023-12-31	IRON TRIANGLE PARTNERS LP	3.97%	1.28M	14.42M	304.48K	+31.06%
2023-12-31	FRED ALGER MANAGEMENT, LLC	3.74%	1.21M	13.58M	-121.12K	-9.10%
2023-12-31	PLATINUM INVESTMENT MANAGEMENT LTD	2.42%	781.87K	8.77M	-52.95K	-6.34%
2023-12-31	AWM INVESTMENT COMPANY, INC.	2.02%	653.47K	7.33M	91.96K	+16.38%
2023-12-31	NIKKO ASSET MANAGEMENT AMERICAS, INC.	1.8%	582.03K	6.54M	-47.96K	-7.61%
2023-12-31	SUMITOMO MITSUI TRUST HOLDINGS, INC.	1.8%	582.03K	6.53M	-47.96K	-7.61%
2023-12-31	TAO CAPITAL MANAGEMENT LP	1.76%	568.98K	6.38M	0	0
2023-12-31	JPMORGAN CHASE & CO	0.05%	14.54K	163.16K	291	+2.04%
2023-12-31	GEODE CAPITAL MANAGEMENT, LLC	1.6%	518.59K	5.82M	37.82K	+7.87%
2023-12-31	STATE STREET CORP	1.26%	407.31K	4.57M	-226.19K	-35.70%
2023-12-31	SANDS CAPITAL VENTURES, LLC	0.73%	237.26K	2.66M	0	0
2023-12-31	NORTHERN TRUST CORP	0.56%	180.93K	2.03M	-4.02K	-2.17%
2023-12-31	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.56%	180.66K	2.03M	10.96K	+6.46%
2023-12-31	DIMENSIONAL FUND ADVISORS LP	0.34%	110.96K	1.24M	89.56K	+418.55%
2023-12-31	NUVEEN ASSET MANAGEMENT, LLC	0.31%	101.64K	1.14M	7.42K	+7.88%
2023-12-31	TANG CAPITAL MANAGEMENT LLC	0.31%	100K	1.12M	0	0
2023-12-31	RENAISSANCE TECHNOLOGIES LLC	0.3%	96.9K	1.09M	12.2K	+14.40%
2023-12-31	BANK OF NEW YORK MELLON CORP	0.28%	92.2K	1.03M	-1.58K	-1.68%
2023-12-31	NEW YORK STATE COMMON RETIREMENT FUND	0.23%	74.03K	831K	3.51K	+4.97%
2023-12-31	MORGAN STANLEY	0.22%	70.33K	789.05K	28.51K	+68.19%
2023-12-31	BRUCE & CO., INC.	0.21%	68.29K	766.17K	0	0
2023-12-31	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0.2%	65.5K	734.91K	-10.8K	-14.15%
2023-12-31	CITADEL ADVISORS LLC	0.17%	53.86K	604.34K	19.11K	+54.98%
2023-12-31	LPL FINANCIAL LLC	0.16%	52.46K	588.56K	9.35K	+21.69%
2023-12-31	BANK OF AMERICA CORP /DE/	0.14%	45.27K	507.94K	24.22K	+115.09%
2023-12-31	RHUMBLINE ADVISERS	0.11%	37.03K	415.46K	4.05K	+12.28%
2023-12-31	PEAK6 INVESTMENTS LLC	0.08%	24.8K	278.26K	24.8K	+100.00%
2023-12-31	BARCLAYS PLC	0.09%	30.11K	338K	26.27K	+683.78%
2023-12-31	ENVESTNET ASSET MANAGEMENT INC	0.09%	28.93K	324.62K	4.99K	+20.83%
2023-12-31	GOLDMAN SACHS GROUP INC	0.09%	28.28K	317.29K	3.92K	+16.08%
2023-12-31	ARETE WEALTH ADVISORS, LLC	0.09%	27.96K	313.69K	5.2K	+22.85%
2023-12-31	PRIMECAP MANAGEMENT CO/CA/	0.08%	26.87K	301.48K	0	0
2023-12-31	ALLIANCEBERNSTEIN L.P.	0.08%	26.03K	292.06K	1.69K	+6.94%
2023-12-31	TOWER RESEARCH CAPITAL LLC (TRC)	0.08%	25.03K	280.8K	10.07K	+67.27%
2023-12-31	MILLENNIUM MANAGEMENT LLC	0.08%	24.48K	274.64K	8.1K	+49.47%
2023-12-31	HRT FINANCIAL LP	0.07%	24.02K	269K	10.5K	+77.63%
2023-12-31	THRIVENT FINANCIAL FOR LUTHERANS	0.07%	23.47K	263K	0	0
2023-12-31	UBS GROUP AG	0.07%	22.74K	255.19K	10.29K	+82.62%
2023-12-31	CAMPBELL & CO INVESTMENT ADVISER LLC	0.07%	22.22K	249.35K	22.22K	+100.00%
2023-12-31	POINT72 ASSET MANAGEMENT, L.P.	0.06%	20.2K	226.64K	20.2K	+100.00%
2023-12-31	AMERICAN CENTURY COMPANIES INC	0.06%	19.97K	224.1K	6.97K	+53.56%
2023-12-31	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	17.83K	200.1K	-8K	-30.97%
2023-12-31	VALUES FIRST ADVISORS, INC.	0.05%	17K	190.77K	277	+1.66%

MASS Insiders

Insiders	Designation	Shares Held
BROWN CHRISTOPHER D.	Chief Product Officer	962.12K
KNOPP KEVIN J.	President and CEO	692.73K
GRIFFITH JOSEPH H. IV	Chief Financial Officer	109.87K
BASARSKY TRENT A.	VP, Corporate Development	75.2K
SPOTO MARK	director	40.42K
TURNER MICHAEL S.	Chief Legal & Admin Officer	24.6K
FITZPATRICK MAURA	VP, Product Management & Mktg	2.83K
KENNEWEG JOHN	Vice President, Government	0

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
2025-02-03	GRIFFITH JOSEPH H. IV	SALE	2.35	4.32K	10.17K	109.87K
2025-02-03	BROWN CHRISTOPHER D.	SALE	2.33	3.64K	8.5K	962.12K
2025-02-03	KNOPP KEVIN J.	SALE	2.32	6.52K	15.12K	692.73K
2025-02-03	TURNER MICHAEL S.	SALE	2.32	4.16K	9.65K	24.6K
2024-05-13	KNOPP KEVIN J.	PURCHASE	6.42	10K	64.2K	508.98K
2024-05-10	KNOPP KEVIN J.	PURCHASE	5.77	10K	57.7K	498.98K
2024-05-09	KNOPP KEVIN J.	PURCHASE	5.83	10K	58.3K	488.98K
2024-05-08	KNOPP KEVIN J.	PURCHASE	5.72	10K	57.2K	478.98K
2024-05-07	KNOPP KEVIN J.	PURCHASE	5.60	10K	56K	468.98K
2024-02-02	GRIFFITH JOSEPH H. IV	SALE	7.09	9.71K	68.87K	80K
2024-02-01	KNOPP KEVIN J.	SALE	7.02	4.97K	34.88K	411.98K
2024-02-01	BROWN CHRISTOPHER D.	SALE	7.02	2.36K	16.55K	886.39K
2024-02-01	TURNER MICHAEL S.	SALE	6.97	3.62K	25.2K	9.11K
2024-02-01	GRIFFITH JOSEPH H. IV	SALE	7.00	3.81K	26.68K	89.71K
2023-12-28	GRIFFITH JOSEPH H. IV	SALE	12.08	6K	72.48K	80K
2023-12-21	BROWN CHRISTOPHER D.	SALE	9.12	7.37K	67.21K	877.91K
2023-12-20	BROWN CHRISTOPHER D.	SALE	9.10	5.24K	47.64K	885.28K
2023-12-19	BROWN CHRISTOPHER D.	SALE	9.08	1.31K	11.85K	890.51K
2023-12-19	GRIFFITH JOSEPH H. IV	SALE	9.08	5.58K	50.67K	86K
2023-06-07	BROWN CHRISTOPHER D.	SALE	10.03	4.47K	44.83K	897.91K
2023-05-23	KNOPP KEVIN J.	SALE	10.12	60K	607.2K	367.85K
2023-05-23	BROWN CHRISTOPHER D.	SALE	10.02	10K	100.2K	892.38K
2023-02-16	KNOPP KEVIN J.	SALE	10.12	4.84K	49K	427.85K
2023-02-15	KNOPP KEVIN J.	SALE	10.29	15.16K	155.98K	432.69K
2023-02-02	BROWN CHRISTOPHER D.	SALE	10.03	10K	100.3K	902.38K
2023-02-02	GRIFFITH JOSEPH H. IV	SALE	10.03	3.27K	32.76K	91.58K
2023-02-02	KNOPP KEVIN J.	SALE	10.51	40K	420.4K	447.85K
2023-02-02	TURNER MICHAEL S.	SALE	10.02	2.85K	28.54K	0
2023-02-01	KNOPP KEVIN J.	SALE	9.36	4.05K	37.9K	487.85K
2023-02-01	FITZPATRICK MAURA	SALE	9.20	1.59K	14.66K	2.83K
2023-02-01	TURNER MICHAEL S.	SALE	9.17	1.58K	14.48K	2.85K
2023-02-01	GRIFFITH JOSEPH H. IV	SALE	9.17	1.84K	16.84K	94.85K
2023-02-01	BROWN CHRISTOPHER D.	SALE	9.17	1.56K	14.34K	912.38K
2022-11-22	SPOTO MARK	PURCHASE	9.65	2.59K	24.95K	40.42K
2022-11-15	KNOPP KEVIN J.	SALE	12.40	1.01K	12.56K	480.64K
2022-10-18	KNOPP KEVIN J.	SALE	15.32	18.8K	288.02K	500.64K
2022-10-17	KNOPP KEVIN J.	SALE	14.68	11.2K	164.42K	519.44K
2022-08-17	TURNER MICHAEL S.	SALE	18.15	5K	90.75K	0
2022-08-15	KNOPP KEVIN J.	SALE	19.23	27.63K	531.27K	563.02K
2022-08-05	KNOPP KEVIN J.	SALE	25.32	25.91K	656.04K	590.93K
2022-08-03	GRIFFITH JOSEPH H. IV	SALE	24.39	12.73K	310.56K	91.58K
2022-08-02	TURNER MICHAEL S.	SALE	23.96	10K	239.6K	0
2022-07-28	KNOPP KEVIN J.	SALE	22.46	14.65K	328.97K	616.84K
2022-07-21	KNOPP KEVIN J.	SALE	22.04	200	4.41K	655.19K
2022-07-15	KNOPP KEVIN J.	SALE	17.74	18.23K	323.42K	655.39K
2022-07-06	BROWN CHRISTOPHER D.	SALE	21.04	6.8K	143.07K	932.11K
2022-07-06	KNOPP KEVIN J.	SALE	22.07	1K	22.07K	685.84K
2022-06-29	TURNER MICHAEL S.	SALE	20.03	5K	100.15K	0
2022-06-29	BROWN CHRISTOPHER D.	SALE	20.22	16.47K	333.04K	942.61K
2022-06-24	GRIFFITH JOSEPH H. IV	SALE	19.13	13.13K	251.16K	91.58K
2022-06-23	TURNER MICHAEL S.	SALE	17.90	10K	179K	5K
2022-06-21	KNOPP KEVIN J.	SALE	15.07	9.2K	138.64K	686.84K
2022-06-17	GRIFFITH JOSEPH H. IV	SALE	15.06	8.1K	121.99K	91.58K
2022-06-15	GRIFFITH JOSEPH H. IV	SALE	15.02	1K	15.02K	91.58K
2022-06-15	KNOPP KEVIN J.	SALE	14.62	18.8K	274.86K	698.04K
2022-06-13	GRIFFITH JOSEPH H. IV	SALE	13.54	13.33K	180.54K	91.58K
2022-04-12	KENNEWEG JOHN	SALE	20.07	9.88K	198.29K	0
2022-04-12	BROWN CHRISTOPHER D.	SALE	20.06	9.83K	197.17K	959.08K
2022-04-11	BASARSKY TRENT A.	SALE	19.73	14.8K	292K	75.2K
2022-03-18	BROWN CHRISTOPHER D.	SALE	20.06	19.9K	399.19K	968.91K
2022-03-18	KENNEWEG JOHN	SALE	20.06	19.88K	398.81K	0
2022-03-14	BASARSKY TRENT A.	SALE	17.19	8.24K	141.59K	66.76K
2022-03-11	BROWN CHRISTOPHER D.	SALE	20.00	100	2K	988.81K
2022-03-11	KENNEWEG JOHN	SALE	20.00	119	2.38K	0
2022-02-15	BASARSKY TRENT A.	SALE	15.20	9.29K	141.24K	45K
2022-02-14	BASARSKY TRENT A.	SALE	15.14	5.71K	86.42K	45K
2022-01-12	BASARSKY TRENT A.	SALE	20.32	2K	40.64K	45K
2022-01-11	KENNEWEG JOHN	SALE	20.15	9.3K	187.4K	0
2022-01-10	KENNEWEG JOHN	SALE	20.04	700	14.03K	0
2022-01-05	BROWN CHRISTOPHER D.	SALE	24.05	6.71K	161.47K	988.91K
2021-12-01	BROWN CHRISTOPHER D.	SALE	24.29	1.23K	29.88K	998.91K
2021-11-16	KENNEWEG JOHN	SALE	31.10	502	15.61K	0
2021-11-05	GRIFFITH JOSEPH H. IV	SALE	39.08	2.8K	109.42K	88.78K
2021-11-03	BROWN CHRISTOPHER D.	SALE	33.24	3.43K	113.88K	1.01M
2021-11-01	KNOPP KEVIN J.	SALE	35.27	8.33K	293.73K	716.84K
2021-10-18	KENNEWEG JOHN	SALE	32.22	10K	322.2K	0
2021-10-06	BROWN CHRISTOPHER D.	SALE	33.33	1.58K	52.66K	1.02M
2021-10-01	KNOPP KEVIN J.	SALE	34.93	5.47K	191.14K	736.84K
2021-09-23	BASARSKY TRENT A.	SALE	38.04	3.87K	147.29K	29K
2021-09-16	KENNEWEG JOHN	SALE	36.61	10K	366.1K	0
2021-09-09	TURNER MICHAEL S.	SALE	37.05	6.9K	255.5K	5K
2021-09-08	GRIFFITH JOSEPH H. IV	SALE	37.30	23.94K	892.96K	106.74K
2021-09-01	KNOPP KEVIN J.	SALE	35.40	5.6K	198.2K	771.24K

Insider Transaction Summary (6 Months)

SHARESTRANS

PURCHASE00

SALES18.65K4

NET SHARES-18.65K4

NO. OF SHARES HELD1.79M4

% NET SHARES-101.04%0%

MASS Stock Ownership Breakdown

908 Devices Inc.

MASS Stock Outstanding Shares

Market Insider MASS

Institutional Ownership

MASS Insiders

Buying/Selling by Insiders

Insider Transaction Summary (6 Months)

Frequently Asked Questions

MASS Stock Outstanding Shares

Market Insider MASS

Institutional Ownership

MASS Insiders

Buying/Selling by Insiders

Insider Transaction Summary (6 Months)

Frequently Asked Questions