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Public ownership evidence

ATI Inc. (ATI) Ownership Disclosures

Read ATI insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-09-232026-09-21Harris Timothy JS9,000Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-21 and its public availability date is 2026-09-23. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001193125-26-398695 ↗SEC 0001193125-26-393438 ↗SEC 0001193125-26-387885 ↗

Recent Form 4 activity

Inspect all 11 displayed rows: Recent Form 4 activity

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2026-09-232026-09-21Harris Timothy JS9,000Not reported
2026-09-172026-09-14Harris Timothy JS16,500Not reported
2026-09-102026-09-08Harris Timothy JS16,500Not reported
2026-09-052026-09-02Morehouse David JS2,485Not reported
2026-09-032026-08-31Harris Timothy JS16,500Not reported
2026-08-272026-08-24Harris Timothy JS16,500Not reported
2026-08-202026-08-17Fields Kimberly AS4,598Not reported
2026-08-202026-08-17Fields Kimberly AS9,116Not reported
2026-08-202026-08-17Fields Kimberly AS8,131Not reported
2026-08-202026-08-17Fields Kimberly AS2,000Not reported
2026-08-202026-08-17Fields Kimberly AS1,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2927$5,322None
Cornerstone Financial Management LLC2026-03-312026-08-2927$3,927None
Cornerstone Financial Management LLC2025-12-312026-08-2927$3,099None
Advisors Asset Management, Inc.2022-12-312026-08-2851,257$1,530,534None
Advisors Asset Management, Inc.2020-06-302026-08-2811,765$119,885None
Advisors Asset Management, Inc.2022-06-302026-08-2833,904$770,000None
Corient Private Wealth LP2026-06-302026-08-2877,682$15,311,190None
Corient Private Wealth LP2026-06-302026-08-281,046$206,167None
Principia Wealth Advisory, LLC2026-06-302026-08-275$986None
Principia Wealth Advisory, LLC2026-03-312026-08-272$291None
Advisors Asset Management, Inc.2024-03-312026-08-2775,729$3,875,053None
Advisors Asset Management, Inc.2025-03-312026-08-2782,766$4,306,315None
Advisors Asset Management, Inc.2022-09-302026-08-2734,396$915,000None
Advisors Asset Management, Inc.2020-12-312026-08-2710,222$171,000None
Advisors Asset Management, Inc.2022-03-312026-08-2724,328$652,964None
Advisors Asset Management, Inc.2023-06-302026-08-2766,351$2,934,705None
Advisors Asset Management, Inc.2023-09-302026-08-2771,680$2,949,632None
Advisors Asset Management, Inc.2023-03-312026-08-2781,967$3,234,418None
Advisors Asset Management, Inc.2021-03-312026-08-273,045$64,128None
Advisors Asset Management, Inc.2021-06-302026-08-271,893$39,000None
Advisors Asset Management, Inc.2020-09-302026-08-2710,923$95,249None
Advisors Asset Management, Inc.2025-09-302026-08-2791,859$7,471,811None
Advisors Asset Management, Inc.2023-12-312026-08-2781,176$3,691,073None
Redwood Investment Management, LLC2025-09-302026-08-2714,635$1,190,000None
Redwood Investment Management, LLC2025-12-312026-08-279,495$1,090,000None
Advisors Asset Management, Inc.2019-12-312026-08-2613,173$272,154None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-2616,028$2,331,433None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2623,828$4,696,499None
Advisors Asset Management, Inc.2025-06-302026-08-2588,992$7,683,569None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25158,400$31,220,640None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2531,220,640$158,400,000None
Advisors Asset Management, Inc.2024-09-302026-08-2277,022$5,153,542None
Advisors Asset Management, Inc.2024-06-302026-08-2265,868$3,652,381None
Advisors Asset Management, Inc.2024-12-312026-08-2283,652$4,604,206None
Advisors Asset Management, Inc.2025-12-312026-08-2297,321$11,168,558None
Advisors Asset Management, Inc.2020-03-312026-08-2212,727$108,180None
Assenagon Asset Management S.A.2026-06-302026-08-22657,117$129,517,761None
Archer Investment Corp2026-06-302026-08-201,510$297,621None
Expect Equity LLC2026-03-312026-08-2025,945$3,773,960None
Expect Equity LLC2025-12-312026-08-2028,410$3,260,332None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2035,120$6,922,099None
Beacon Pointe Advisors, LLC2026-06-302026-08-191,680$331,128None
Copia Wealth Management2026-06-302026-08-192$394None
Advisors Asset Management, Inc.2019-03-312026-08-194,154$106,218None
Advisors Asset Management, Inc.2019-09-302026-08-1911,123$225,241None
Advisors Asset Management, Inc.2019-06-302026-08-198,982$226,346None
Leo H. Evart, Inc.2026-06-302026-08-1910$1,971None
Ensign Peak Advisors, Inc2026-03-312026-08-1920,815$3,027,750None
Ensign Peak Advisors, Inc2025-12-312026-08-1915,565$1,786,239None
Ensign Peak Advisors, Inc2025-09-302026-08-1926,141$2,126,309None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Corient Private Wealth LP ↗Corient Private Wealth LP ↗Principia Wealth Advisory, LLC ↗Principia Wealth Advisory, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.