Who owns Ecovyst (ECVT)
Which tracked institutional funds hold ECVT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ECVT company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
60 tracked funds added or opened ECVT while 52 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ECVT’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes ECVT more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ECVT divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 195 tracked filers holding ECVT, 121 increased or opened the position and 98 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ECVT between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 22
- AltraVue Capital, LLC$25M
- Qube Research & Technologies Ltd$21M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$12M
- Apis Capital Advisors, LLC$7M
- Legato Capital Management LLC$6M
- UniSuper Management Pty Ltd$6M
Full exits 22
- OAKTREE CAPITAL MANAGEMENT LP$31M
- Driehaus Capital Management LLC$17M
- BRIGADE CAPITAL MANAGEMENT, LP$11M
- Congruence Capital, LLC$10M
- SHAPIRO CAPITAL MANAGEMENT LLC$10M
- SG Americas Securities, LLC$7M
Largest adds
- BlackRock, Inc.$20M
- AMERICAN CENTURY COMPANIES INC$17M
- GOLDMAN SACHS GROUP INC$15M
- NewEdge Advisors, LLC$10M
- FMR LLC$9M
- VANGUARD PORTFOLIO MANAGEMENT LLC$8M
Largest trims
- HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC$52M
- Allspring Global Investments Holdings, LLC$33M
- Owls Nest Partners IA, LLC$15M
- Rubric Capital Management LP$15M
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$13M
- Point72 Asset Management, L.P.$12M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 10,666,032 | $133M | 10.0% | 2026-Q2 |
| Rubric Capital Management LP trimmed | 8,211,888 | $102M | 7.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 6,585,047 | $82M | 6.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 6,090,922 | $76M | 5.7% | 2026-Q2 |
| FMR LLC added | 5,333,701 | $66M | 5.0% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 5,132,947 | $64M | 4.8% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 4,843,861 | $60M | 4.6% | 2026-Q2 |
| BROWN ADVISORY INC trimmed | 4,533,515 | $56M | 4.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 3,474,853 | $43M | 3.3% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,149,827 | $39M | 3.0% | 2026-Q2 |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC added | 3,012,000 | $37M | 2.8% | 2026-Q2 |
| STATE STREET CORP added | 2,675,032 | $33M | 2.5% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 2,621,153 | $33M | 2.5% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 2,229,504 | $28M | 2.1% | 2026-Q2 |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC trimmed | 2,171,238 | $27M | 2.0% | 2026-Q2 |
| AltraVue Capital, LLC new | 2,008,430 | $25M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,898,885 | $24M | 1.8% | 2026-Q2 |
| Qube Research & Technologies Ltd new | 1,663,145 | $21M | 1.6% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 1,408,019 | $17M | 1.3% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 1,404,452 | $17M | 1.3% | 2026-Q2 |
| MORGAN STANLEY added | 1,130,194 | $14M | 1.1% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 1,020,000 | $13M | 1.0% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 1,013,758 | $13M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP added | 980,058 | $12M | 0.9% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 942,306 | $12M | 0.9% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 934,724 | $11M | 0.9% | 2026-Q2 |
| NewEdge Advisors, LLC added | 895,435 | $11M | 0.8% | 2026-Q2 |
| Allianz Asset Management GmbH added | 894,838 | $11M | 0.8% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 860,439 | $11M | 0.8% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 848,000 | $11M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 773,853 | $10M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 584,237 | $7M | 0.5% | 2026-Q2 |
| Empowered Funds, LLC added | 575,365 | $7M | 0.5% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 571,901 | $7M | 0.5% | 2026-Q2 |
| Ballast Asset Management, LP trimmed | 549,113 | $7M | 0.5% | 2026-Q2 |
| Apis Capital Advisors, LLC new | 540,000 | $7M | 0.5% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 515,750 | $6M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 500,966 | $6M | 0.5% | 2026-Q2 |
| CastleKnight Management LP added | 473,548 | $6M | 0.4% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 472,517 | $6M | 0.4% | 2026-Q2 |
| Legato Capital Management LLC new | 470,171 | $6M | 0.4% | 2026-Q2 |
| UniSuper Management Pty Ltd new | 458,182 | $6M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 439,630 | $5M | 0.4% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 439,371 | $5M | 0.4% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 434,094 | $5M | 0.4% | 2026-Q2 |
| Trexquant Investment LP added | 421,136 | $5M | 0.4% | 2026-Q2 |
| KESTREL INVESTMENT MANAGEMENT CORP | 405,400 | $5M | 0.4% | 2026-Q2 |
| Tiptree Advisors, LLC added | 400,000 | $5M | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 397,180 | $5M | 0.4% | 2026-Q2 |
| Invesco Ltd. added | 381,441 | $5M | 0.4% | 2026-Q2 |
| ExodusPoint Capital Management, LP added | 362,506 | $5M | 0.3% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 351,792 | $4M | 0.3% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 329,773 | $4M | 0.3% | 2026-Q2 |
| Nuveen, LLC added | 324,442 | $4M | 0.3% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 288,194 | $4M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 264,971 | $3M | 0.2% | 2026-Q2 |
| Gotham Asset Management, LLC added | 261,889 | $3M | 0.2% | 2026-Q2 |
| Simcoe Capital LLC new | 239,128 | $3M | 0.2% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP new | 239,053 | $3M | 0.2% | 2026-Q2 |
| Edgestream Partners, L.P. new | 234,584 | $3M | 0.2% | 2026-Q2 |
| VIRGINIA RETIREMENT SYSTEMS ET Al added | 224,400 | $3M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 219,600 | $3M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 217,230 | $3M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 213,100 | $3M | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 203,200 | $3M | 0.2% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL new | 202,156 | $3M | 0.2% | 2026-Q2 |
| XTX Topco Ltd added | 192,763 | $2M | 0.2% | 2026-Q2 |
| Owls Nest Partners IA, LLC trimmed | 191,931 | $2M | 0.2% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC trimmed | 187,022 | $2M | 0.2% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 167,755 | $2M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 148,099 | $2M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 139,280 | $2M | 0.1% | 2026-Q2 |
| Man Group plc trimmed | 138,801 | $2M | 0.1% | 2026-Q2 |
| EASTERLY INVESTMENT PARTNERS LLC | 135,610 | $2M | 0.1% | 2026-Q2 |
| UBS Group AG trimmed | 132,509 | $2M | 0.1% | 2026-Q2 |
| VARCOV Co. trimmed | 125,347 | $2M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 122,443 | $2M | 0.1% | 2026-Q2 |
| Bleakley Financial Group, LLC added | 118,647 | $1M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 117,964 | $1M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 115,710 | $1M | 0.1% | 2026-Q2 |
| CenterBook Partners LP trimmed | 114,064 | $1M | 0.1% | 2026-Q2 |
| Campbell & CO Investment Adviser LLC trimmed | 111,843 | $1M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 111,106 | $1M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 110,683 | $1M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 109,620 | $1M | 0.1% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. new | 104,989 | $1M | 0.1% | 2026-Q2 |
| Verdence Capital Advisors LLC trimmed | 103,372 | $1M | 0.1% | 2026-Q2 |
| Legal & General Group Plc added | 103,061 | $1M | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 102,300 | $1M | 0.1% | 2026-Q2 |
| COOKSON PEIRCE & CO INC new | 98,579 | $1M | 0.1% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 92,700 | $1M | 0.1% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 87,219 | $1M | 0.1% | 2026-Q2 |
| CWA Asset Management Group, LLC new | 87,118 | $1M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 84,918 | $1M | 0.1% | 2026-Q2 |
| JENNISON ASSOCIATES LLC new | 81,299 | $1M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 75,951 | $946K | 0.1% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP new | 73,425 | $914K | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP trimmed | 72,371 | $901K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP trimmed | 69,778 | $869K | 0.1% | 2026-Q2 |
| STRS OHIO added | 69,500 | $865K | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.