PRICE T ROWE ASSOCIATES INC /MD/

Holdings History for MKS INSTRUMENTS INC - COMMON STOCK (MKSI)

Symbol: MKSI on Nasdaq
Investment type: Equity - Shares of Stock
Class: COMMON STOCK
Latest Disclosed Ownership: 3.34M shares
Security Ownership: 5%

Shares, Excluding Options vs Price

Value, Excluding Options

T. Rowe Price Associates, Inc. ownership in MKS INSTRUMENTS INC COMMON STOCK (MKSI)

2025-02-14 - T. Rowe Price Associates, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 3.34M shares of MKS INSTRUMENTS INC COMMON STOCK (MKSI). This represents 5% percent ownership of the company.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
T. Rowe Price Associates, Inc.	5%		$284M	3.34M			$84.89	13G/A	12/31/2024	14 Feb 2025 09:44:09

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
12/31/2024	0.04%	-0.01%	$349M	3.34M	-937,206	-21.9%	$104.39	Q4 2024
9/30/2024	0.05%	-0.03%	$465M	4.28M	-2,566,927	-37.5%	$108.71	Q3 2024
6/30/2024	0.11%	-0.01%	$894M	6.85M	-717,386	-9.49%	$130.58	Q2 2024
3/31/2024	0.12%	-0.01%	$1.01B	7.56M	-521,384	-6.45%	$133.00	Q1 2024
12/31/2023	0.11%	+0.05%	$832M	8.08M	+3,324,764	+69.9%	$102.87	Q4 2023
9/30/2023	0.06%	+0.01%	$412M	4.76M	+1,172,608	+32.7%	$86.54	Q3 2023
6/30/2023	0.05%	+0.03%	$388M	3.59M	+1,705,212	+90.6%	$108.10	Q2 2023
3/31/2023	0.02%	+0.01%	$167M	1.88M	+383,717	+25.6%	$88.62	Q1 2023
12/31/2022	0.02%	+0.01%	$127M	1.5M	+1,058,245	+241%	$84.73	Q4 2022
9/30/2022	0.01%	+0%	$36.3M	440K	+834	+0.19%	$82.64	Q3 2022
6/30/2022	0.01%	+0%	$45.1M	439K	+2,195	+0.5%	$102.63	Q2 2022
3/31/2022	0.01%	+0%	$65.5M	437K	+5,474	+1.27%	$150.00	Q1 2022
12/31/2021	0.01%	+0%	$75.1M	431K	+844	+0.2%	$174.17	Q4 2021
9/30/2021	0.01%	0%	$65M	430K	-39,618	-8.43%	$150.91	Q3 2021
6/30/2021	0.01%	0%	$83.6M	470K	-79,474	-14.5%	$177.95	Q2 2021
3/31/2021	0.01%	-0.01%	$102M	550K	-505,948	-47.9%	$185.42	Q1 2021
12/31/2020	0.02%	+0%	$159M	1.06M	+74,241	+7.57%	$150.45	Q4 2020
9/30/2020	0.01%	0%	$107M	981K	-34,149	-3.36%	$109.23	Q3 2020
6/30/2020	0.01%	+0%	$115M	1.02M	+18,989	+1.91%	$113.24	Q2 2020
3/31/2020	0.01%	0%	$81.2M	996K	-70,315	-6.59%	$81.45	Q1 2020
12/31/2019	0.02%	0%	$117M	1.07M	-2,524	-0.24%	$110.01	Q4 2019
9/30/2019	0.01%	0%	$98.7M	1.07M	-134,892	-11.2%	$92.28	Q3 2019
6/30/2019	0.01%	0%	$93.8M	1.2M	-36,776	-2.96%	$77.89	Q2 2019
3/31/2019	0.02%	0%	$115M	1.24M	-87,924	-6.62%	$93.05	Q1 2019
12/31/2018	0.01%	+0%	$85.9M	1.33M	+173,168	+15%	$64.61	Q4 2018
9/30/2018	0.01%	+0%	$92.6M	1.16M	+202,329	+21.2%	$80.15	Q3 2018
6/30/2018	0.01%	+0%	$91.2M	953K	+21,381	+2.29%	$95.70	Q2 2018
3/31/2018	0.02%	+0.01%	$108M	932K	+320,758	+52.5%	$115.65	Q1 2018
12/31/2017	0.01%	+0%	$57.8M	611K	+224,310	+58%	$94.50	Q4 2017
9/30/2017	0.01%	+0%	$36.5M	387K	+20,809	+5.68%	$94.45	Q3 2017
6/30/2017	0%	+0%	$24.6M	366K	+349,111	+2058%	$67.30	Q2 2017
3/31/2017	0%		$1.17M	17K			$68.74	Q1 2017
12/31/2016	0%		$1.01M	17K	+9	+0.05%	$59.43	Q4 2016
9/30/2016	0%		$843K	17K			$49.73	Q3 2016
6/30/2016	0%		$730K	17K			$43.06	Q2 2016
3/31/2016	0%		$638K	17K			$37.63	Q1 2016
12/31/2015	0%	+0%	$610K	17K	+2,240	+15.2%	$35.98	Q4 2015
9/30/2015	0%		$493K	14.7K			$33.51	Q3 2015
6/30/2015	0%		$558K	14.7K			$37.93	Q2 2015
3/31/2015	0%		$497K	14.7K			$33.78	Q1 2015
12/31/2014	0%		$538K	14.7K			$36.57	Q4 2014
9/30/2014	0%		$491K	14.7K			$33.37	Q3 2014
6/30/2014	0%		$460K	14.7K			$31.26	Q2 2014
3/31/2014	0%		$440K	14.7K			$29.91	Q1 2014
12/31/2013	0%		$441K	14.7K			$29.97	Q4 2013

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.