ATI Ownership | Who Owns ATI?

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ATI Ownership Summary

ATI is owned by 14.69% institutional investors, 0.80% insiders, and 84.50% retail investors. Capital investors is the largest institutional shareholder, holding 12.58% 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	14.69%	0.80%	84.50%
Sector	Industrials Stocks	47.69%	12.55%	39.76%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Capital investors	17.10M	12.58%	$1.96B
Blackrock	15.54M	10.87%	$861.91M
Blackrock funding, inc. /de	14.67M	10.79%	$1.68B
Vanguard group	12.73M	9.36%	$1.46B
Capital world investors	7.36M	5.41%	$844.15M
State street	6.04M	4.32%	$491.48M
Fmr	4.90M	3.50%	$398.50M
Capital research global investors	3.61M	2.66%	$414.48M
Invesco	3.15M	2.25%	$256.38M
Dendur capital lp	2.69M	1.92%	$218.74M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Dendur capital lp	2.69M	22.69%	$218.74M
Mountaineer partners management	128.91K	8.28%	$14.79M
Lts one management lp	210.00K	6.09%	$17.08M
Tran capital management	352.32K	4.84%	$40.43M
Fact capital, lp	101.40K	4.29%	$8.25M
Candelo capital management lp	60.90K	4.27%	$4.95M
Jones road capital management	82.70K	3.98%	$6.73M
S squared	80.00K	3.56%	$9.18M
Tribune investment group lp	57.00K	3.55%	$6.54M
Bowen hanes	1.18M	3.39%	$135.15M

Top Buyers

Holder	Shares	% Assets	Change
Norges bank	1.73M	0.02%	1.73M
Fmr	4.90M	0.02%	1.49M
Holocene advisors, lp	1.53M	0.28%	929.33K
Ubs group	1.19M	0.02%	702.66K
Scout investments	444.31K	0.66%	444.31K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	15.54M	0.02%	-4.54M
Millennium management	99.94K	0.00%	-1.50M
Palestra capital management	-	-	-1.06M
Fuller & thaler asset management	-	-	-911.11K
Driehaus capital management	-	-	-816.69K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.73M	0.02%	1.73M	$198.79M
Scout investments	444.31K	0.66%	444.31K	$24.64M
Vaughan nelson investment management	377.55K	0.42%	377.55K	$43.33M
Mufg securities emea	277.00K	0.37%	277.00K	$31.79M
Lord, abbett	267.05K	0.09%	267.05K	$30.65M

Sold Out

Holder	Change
Cornerstone planning group	-1.00
Mather group, llc.	-1.00
Stephens consulting	-1.00
Newsquare capital	-2.00
Tfo-tdc	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	198	-60.16%	19,969,553	-84.49%	14	0.17%	103	-57.44%	56	-64.33%
Sep 30, 2025	214	-56.33%	24,594,902	-81.65%	17	0.19%	101	-58.78%	64	-64.25%
Jun 30, 2025	483	11.03%	133,865,193	1.60%	95	0.94%	240	-2.04%	177	46.28%
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%

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	6.84M	5.00%	188.80K
Capital Group Growth Fnd of Amer Comp	6.84M	5.00%	188.80K
American Funds SMALLCAP World A	4.39M	3.21%	-197.03K
iShares Core S&P Mid-Cap ETF	4.39M	3.20%	4.39M
Vanguard Total Stock Mkt Idx Inv	4.28M	3.12%	9.30K
Vanguard US Total Market Shares ETF	3.96M	2.81%	2.99K
American Funds AMCAP A	3.82M	2.79%	188.62K
Capital Group AMCAP Composite	3.82M	2.79%	188.62K
American Funds IS® Asset Allocation 1	3.48M	2.54%	-694.97K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 17, 2026	WETHERBEE ROBERT S	Executive Chairman	Buy	$4.20M
Feb 10, 2026	WETHERBEE ROBERT S	Executive Chairman	Sell	$1.53M
Feb 17, 2026	WETHERBEE ROBERT S	Executive Chairman	Sell	$1.79M
Feb 17, 2026	WETHERBEE ROBERT S	Executive Chairman	Sell	$1.22M
Dec 18, 2025	WETHERBEE ROBERT S	Executive Chairman	Sell	$5.19M

Insider Transactions Trends

Date	Buy	Sell
2029 Q4	-	-
2026 Q1	-	-
2025 Q4	-	13
2025 Q3	-	7
2025 Q2	-	9

ATI Ownership FAQ

Who owns the most shares of ATI?

ATI’s largest shareholders are Capital investors (17.1M shares, 12.58%), Blackrock (15.54M shares, 10.87%), and Blackrock funding, inc. /de (14.67M shares, 10.79%). Together, they hold 34.25% 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 22.69% of its assets in 2.69M ATI shares, valued at 218.74M$.

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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