ATI Ownership | Who Owns ATI?

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ATI Ownership Summary

ATI is owned by 101.66% institutional investors, 1.02% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 13.86% of ATI shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.39% of its assets in ATI shares.

ATI Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	ATI	101.66%	1.02%	-2.68%
Sector	Industrials Stocks	39.36%	12.62%	48.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	17.84M	13.86%	$981.82M
Capital investors	15.90M	12.36%	$875.19M
Vanguard group	15.34M	11.92%	$844.06M
Blackrock	15.54M	10.87%	$861.91M
Capital world investors	6.88M	5.34%	$378.43M
Fmr	6.62M	5.15%	$364.47M
State street	5.97M	4.64%	$328.62M
Invesco	4.70M	3.65%	$258.50M
Dendur capital lp	3.57M	2.77%	$196.33M
Ameriprise financial	3.16M	2.45%	$173.68M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Dendur capital lp	3.57M	20.26%	$196.33M
Mountaineer partners management	182.67K	7.36%	$10.05M
Jones road capital management	155.34K	4.15%	$8.55M
Klcm advisors	414.58K	2.65%	$22.82M
Channing capital management	1.67M	2.46%	$92.16M
Bowen hanes	1.37M	2.02%	$75.24M
Graphene investments sas	47.10K	1.79%	$2.59M
Sapience investments	50.04K	1.61%	$2.75M
Frontier capital management	3.06M	1.60%	$168.34M
Register financial advisors	50.25K	1.39%	$2.77M

Top Buyers

Holder	Shares	% Assets	Change
Capital world investors	6.88M	0.06%	3.45M
Dendur capital lp	3.57M	20.26%	3.06M
Vanguard group	15.34M	0.01%	2.02M
Blackrock funding, inc. /de	17.84M	0.02%	1.98M
Norges bank	1.55M	0.01%	1.55M

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	15.54M	0.02%	-4.54M
Fmr	6.62M	0.02%	-2.66M
Millennium management	99.94K	0.00%	-1.50M
Federated hermes	429.55K	0.05%	-1.36M
Driehaus capital management	-	-	-816.69K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.55M	0.01%	1.55M	$85.05M
Raymond james financial	802.23K	0.02%	802.23K	$44.15M
Scout investments	444.31K	0.66%	444.31K	$24.64M
Hudson bay capital management lp	201.61K	0.04%	201.61K	$11.10M
Eagle asset management	174.38K	0.05%	174.38K	$9.46M

Sold Out

Holder	Change
Tfo-tdc	-4.00
Claris advisors, llc / mo /	-6.00
Cornerstone planning group	-6.00
Td waterhouse canada	-7.00
Mendota financial group	-9.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2025	432	5.11%	132,561,794	-2.84%	101	0.90%	244	13.49%	119	-8.46%
Dec 31, 2024	402	-7.37%	136,041,261	3.73%	105	1.02%	210	4.48%	127	-20.13%
Sep 30, 2024	431	3.61%	131,137,187	-0.86%	101	0.90%	200	-3.85%	159	3.92%
Jun 30, 2024	410	14.85%	132,191,807	-0.89%	92	1.06%	204	22.16%	152	23.58%
Mar 31, 2024	357	-	133,375,781	-0.54%	93	0.84%	167	3.73%	123	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	9.09M	6.39%	-1.90K
American Funds Growth Fund of Amer A	5.98M	4.24%	-10.00K
Capital Group Growth Fnd of Amer Comp	5.98M	4.24%	-10.00K
iShares Core S&P Mid-Cap ETF	4.63M	3.28%	3.04K
Vanguard Total Stock Mkt Idx Inv	4.56M	3.23%	45.62K
Vanguard US Total Market Shares ETF	3.96M	2.81%	2.99K
American Funds IS® Asset Allocation 1	3.76M	2.67%	-
American Funds AMCAP A	3.73M	2.65%	229.41K
Capital Group AMCAP Composite	3.73M	2.65%	229.41K
Vanguard Small Cap Index	3.57M	2.53%	21.31K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 03, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$4.08M
May 20, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$3.42M
May 06, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$352.76K
May 06, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$1.60M
May 06, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$1.81M

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	-	6
2025 Q1	-	1
2024 Q4	-	4
2024 Q3	-	1
2024 Q2	-	-

ATI Ownership FAQ

Who owns the most shares of ATI?

ATI’s largest shareholders are Blackrock funding, inc. /de (17.84M shares, 13.86%), Capital investors (15.9M shares, 12.36%), and Vanguard group (15.34M shares, 11.92%). Together, they hold 38.13% of ATI’s total shares outstanding.

Does Blackrock own ATI?

Yes, BlackRock owns 10.87% of ATI, totaling 15.54M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 861.91M$. In the last quarter, BlackRock decreased its holdings by -4.538M shares, a -22.60% change.

Who is ATI’s biggest shareholder by percentage of total assets invested?

Dendur capital lp is ATI’s biggest shareholder by percentage of total assets invested, with 20.26% of its assets in 3.57M ATI shares, valued at 196.33M$.

Who is the top mutual fund holder of ATI shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of ATI shares, with 6.39% of its total shares outstanding invested in 9.09M ATI shares.

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