Security key
01741R102
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 127,333,548
- Total 13F value
- $18,493,904,189
- Share change
- -1,207,293
- Put/Call ratio
- 48%
- SEC-reported price per share
- $145.46
- Number of holders
- 671
- Value change
- -$71,903,765
- Number of buys
- 393
- Number of sells
- 241
- Shares outstanding
- 136,186,000
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
671
Top holders
10
ATI full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
ATI INC SEC filings
ATI INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 01741R102
Recent filing periods:
Ownership snapshot
Top reported holders of ATI - ATI INC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
Capital International Inv...
Comparable rows
15/15
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 10%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
10%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
Capital International Investors
4.5%
Capital World Investors
4.2%
FMR LLC
3.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
10%
from 13D/G
|
$1,683,158,523
14,666,770 shares
|
— | 31 Dec 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
Vanguard Capital Management
|
5.2%
|
$1,039,376,430
7,145,445 shares
|
$0 | 31 Mar 2026 |
| Capital International Investors |
13F
13D/G
Company
|
4.5%
from 13D/G
|
$1,962,203,591
17,095,803 shares
|
— | 31 Dec 2025 |
| Capital World Investors |
13D/G
13F
Company
|
4.2%
|
$936,790,809
5,719,812 shares
|
-$358,563,063 | 31 Mar 2026 |
| FMR LLC |
13F
13D/G
Company
|
3.5%
from 13D/G
|
$582,386,731
5,074,824 shares
|
— | 31 Dec 2025 |
| Tina K. Busch |
3/4/5
SVP, CHRO
|
0.02%
|
$1,984,013
21,274 shares
|
-$242,289 | 21 Nov 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
671
Shares
127,333,548
Rows available
671
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
569
Q1 2026 holders
671
Holder diff
102
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend