Ticker · CUSIP 553498106

MSA

MSA SAFETY INC

Industrials·Security & Protection Services

···Share

Holders (tracked)

Combined shares

2,549,027

Combined value

$408.20M

Last close

$173.21

Quarter

2025Q4

Price is +8.2% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$173.21+30.91 (+21.72%)H $202.55 · L $140.61 · Avg Vol 232K

Tracked holders · last 8 quarters

+4 vs previous quarter over the last 8.

SEC event timeline

18 events

AQR Capital Management added2026-02-17
+7,292 shares · 2025Q4
Position
D.E. Shaw & Co. opened position2026-02-17
+33,846 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−49,475 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2026-02-17
+5,531 shares · 2025Q4
Position
T. Rowe Price trimmed2026-02-17
−301,744 shares · 2025Q4
Position
Ruane, Cunniff & Goldfarb (Sequoia) added2026-02-13
+106,349 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+417,620 shares · 2025Q4
Position
First Eagle Investment Management opened position2026-02-04
+24 shares · 2025Q4
Position
Baillie Gifford & Co trimmed2026-01-23
−13,854 shares · 2025Q4
Position
AQR Capital Management trimmed2025-11-14
−9,418 shares · 2025Q3
Position
Ruane, Cunniff & Goldfarb (Sequoia) added2025-11-14
+756,219 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+41,467 shares · 2025Q3
Position
D.E. Shaw & Co. exited2025-11-14
−3,841 shares · 2025Q3
Position
T. Rowe Price trimmed2025-11-14
−754,502 shares · 2025Q3
Position
Renaissance Technologies exited2025-11-13
−3,800 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−311,390 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−26,266 shares · 2024Q3
Position
Baillie Gifford & Co trimmed2025-10-31
−10,091 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for MSA →

Follow-the-investor returns

If you'd copied each holder of MSA…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Norges Bank (Norway SWF)	2016Q1	$124.11	+39.6%	$72.3M
T. Rowe Price	2016Q1	$156.10	+11.0%	$15.8M
First Eagle Investment Management	2025Q4	$160.13	+8.2%	$4K
D.E. Shaw & Co.	2016Q1	$161.04	+7.6%	$5.9M
Ken Griffin (Citadel Advisors)	2016Q1	$161.45	+7.3%	$2.3M
Ken Griffin (Citadel Advisors)	2016Q1	$161.45	+7.3%	$2.3M
Ken Griffin (Citadel Advisors)	2016Q1	$161.45	+7.3%	$2.3M
Ruane, Cunniff & Goldfarb (Sequoia)	2025Q2	$168.99	+2.5%	$313.8M
Izzy Englander (Millennium Mgmt)	2016Q1	$169.57	+2.1%	$10.4M
AQR Capital Management	2016Q4	$172.64	+0.3%	$8.5M
Baillie Gifford & Co	2023Q4	$178.79	-3.1%	$12.0M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+417,620
$66.9M
D.E. Shaw & Co.
+33,846
$5.4M
First Eagle Investment Management
+24
$4K

Added to3

Ruane, Cunniff & Goldfarb (Sequoia)
+106,349
$17.0M
AQR Capital Management
+7,292
$1.2M
Izzy Englander (Millennium Mgmt)
+5,531
$886K

Trimmed3

Ken Griffin (Citadel Advisors)
−49,475
$7.9M
Baillie Gifford & Co
−13,854
$2.2M
T. Rowe Price
−301,744
$48K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	11	4,760,586	$38.55B	—
2022Q2	12	5,008,615	$34.65B	+1
2022Q3	12	3,919,187	$428.3M	—
2022Q4	11	4,108,283	$592.4M	-1
2023Q1	13	4,091,798	$546.3M	+2
2023Q2	11	3,826,285	$665.6M	-2
2023Q3	12	4,304,850	$678.7M	+1
2023Q4	14	4,727,559	$798.2M	+2
2024Q1	13	4,907,100	$950.0M	-1
2024Q2	12	4,879,700	$915.9M	-1
2024Q3	12	1,710,178	$303.3M	—
2024Q4	11	2,073,433	$343.7M	-1
2025Q1	10	1,575,977	$231.2M	-1
2025Q2	9	2,575,349	$431.4M	-1
2025Q3	7	2,342,338	$403.0M	-2
2025Q4	11	2,549,027	$408.2M	+4

Who owns MSA

11 super-investors · 2025Q4

Tracked stake

2.55M

Combined value

$408M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added3Trim5

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Ruane, Cunniff & Goldfarb Sequoia	1.81M	$290M	4.5%	Added+106.3K
2	Norges Bank Norway SWF	417.6K	$67M	0.0%	New+417.6K
3	T. Rowe Price	91.5K	$15M	0.0%	Trim−301.7K
4	Baillie Gifford & Co	69.1K	$11M	0.0%	Trim−13.9K
5	Izzy Englander Millennium Mgmt	59.8K	$10M	0.0%	Added+5.5K
6	AQR Capital Management	49.3K	$8M	0.0%	Added+7.3K
7	D.E. Shaw & Co.	33.8K	$5M	0.0%	New+33.8K
8	Ken Griffin Citadel Advisors	13.1K	$2M	0.0%	Trim−49.5K
9	Ken Griffin Citadel Advisors	1.6K	$256K	0.0%	Trim−49.5K
10	Ken Griffin Citadel Advisors	1.5K	$240K	0.0%	Trim−49.5K
11	First Eagle Investment Management	24	$4K	0.0%	New+24	—

Recent moves

20 transactions

NEWD.E. Shaw & Co.
+33,846 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−49,475 · 2025Q4
TRIMT. Rowe Price
−301,744 · 2025Q4
ADDAQR Capital Management
+7,292 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+5,531 · 2025Q4
ADDRuane, Cunniff & Goldfarb (Sequoia)
+106,349 · 2025Q4
NEWNorges Bank (Norway SWF)
+417,620 · 2025Q4
NEWFirst Eagle Investment Management
+24 · 2025Q4
TRIMBaillie Gifford & Co
−13,854 · 2025Q4
SOLDD.E. Shaw & Co.
−3,841 · 2025Q3
TRIMT. Rowe Price
−754,502 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+41,467 · 2025Q3
TRIMAQR Capital Management
−9,418 · 2025Q3
ADDRuane, Cunniff & Goldfarb (Sequoia)
+756,219 · 2025Q3
SOLDRenaissance Technologies
−3,800 · 2025Q3
SOLDNorges Bank (Norway SWF)
−311,390 · 2025Q3
TRIMNorges Bank (Norway SWF)
−26,266 · 2024Q3
TRIMBaillie Gifford & Co
−10,091 · 2025Q3
NEWRuane, Cunniff & Goldfarb (Sequoia)
+949,067 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−115,508 · 2025Q2

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