Who owns PRK (PRK)
Which tracked institutional funds hold PRK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PRK company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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
46 tracked funds added or opened PRK while 26 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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
PRK’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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in PRK 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 2025-Q4 and 2026-Q1, across 259 tracked filers holding PRK, 143 increased or opened the position and 98 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 PRK between the 2025-Q4 and 2026-Q1 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 11
- VANGUARD PORTFOLIO MANAGEMENT LLC$158M
- VANGUARD CAPITAL MANAGEMENT LLC$120M
- VANGUARD FIDUCIARY TRUST CO$17M
- VANGUARD ASSET MANAGEMENT, Ltd$2M
- SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC$1M
- Vanguard Global Advisers, LLC$1M
Full exits 10
- VANGUARD GROUP INC$232M
- JANE STREET GROUP, LLC$3M
- D. E. Shaw & Co., Inc.$2M
- J.W. COLE ADVISORS, INC.$2M
- DARK FOREST CAPITAL MANAGEMENT LP$1M
- MILLENNIUM MANAGEMENT LLC$1M
Largest adds
- PARK NATIONAL CORP /OH/$29M
- STATE STREET CORP$17M
- GEODE CAPITAL MANAGEMENT, LLC$10M
- DIMENSIONAL FUND ADVISORS LP$7M
- NORTHERN TRUST CORP$4M
- CHARLES SCHWAB INVESTMENT MANAGEMENT INC$4M
Largest trims
- BlackRock, Inc.$75M
- TUDOR INVESTMENT CORP ET AL$4M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$3M
- BARCLAYS PLC$3M
- JPMORGAN CHASE & CO$3M
- CITADEL ADVISORS LLC$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 1,647,676 | $269M | 19.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 969,328 | $158M | 11.3% | 2026-Q1 |
| STATE STREET CORP added | 747,158 | $122M | 8.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 734,386 | $120M | 8.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 517,432 | $85M | 6.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 381,652 | $62M | 4.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 180,526 | $30M | 2.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 155,727 | $25M | 1.8% | 2026-Q1 |
| Bank of New York Mellon Corp added | 116,009 | $19M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 112,191 | $18M | 1.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 103,570 | $17M | 1.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 78,087 | $13M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 73,747 | $12M | 0.9% | 2026-Q1 |
| UBS Group AG trimmed | 61,778 | $10M | 0.7% | 2026-Q1 |
| Public Sector Pension Investment Board added | 57,513 | $9M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 56,115 | $9M | 0.7% | 2026-Q1 |
| FMR LLC added | 49,621 | $8M | 0.6% | 2026-Q1 |
| Invesco Ltd. added | 49,546 | $8M | 0.6% | 2026-Q1 |
| Nuveen, LLC added | 42,207 | $7M | 0.5% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 41,831 | $7M | 0.5% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 41,683 | $7M | 0.5% | 2026-Q1 |
| Legal & General Group Plc added | 37,199 | $6M | 0.4% | 2026-Q1 |
| BROWN ADVISORY INC trimmed | 32,550 | $5M | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 32,530 | $5M | 0.4% | 2026-Q1 |
| Swiss National Bank added | 32,100 | $5M | 0.4% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 29,210 | $5M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 28,063 | $5M | 0.3% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 23,198 | $4M | 0.3% | 2026-Q1 |
| EUBEL BRADY & SUTTMAN ASSET MANAGEMENT INC added | 22,981 | $4M | 0.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 20,700 | $3M | 0.2% | 2026-Q1 |
| BESSEMER GROUP INC added | 19,584 | $3M | 0.2% | 2026-Q1 |
| Corient Private Wealth LLC added | 18,296 | $3M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 18,214 | $3M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 17,879 | $3M | 0.2% | 2026-Q1 |
| ZACKS INVESTMENT MANAGEMENT added | 17,675 | $3M | 0.2% | 2026-Q1 |
| Quantinno Capital Management LP added | 17,078 | $3M | 0.2% | 2026-Q1 |
| Edgestream Partners, L.P. trimmed | 16,932 | $3M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 16,912 | $3M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 16,145 | $3M | 0.2% | 2026-Q1 |
| Summit Financial Strategies, Inc. | 15,447 | $3M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 15,712 | $3M | 0.2% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 15,165 | $2M | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 16,171 | $2M | 0.2% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 14,267 | $2M | 0.2% | 2026-Q1 |
| Stratos Wealth Partners, LTD. added | 13,985 | $2M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 13,967 | $2M | 0.2% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co added | 13,039 | $2M | 0.2% | 2026-Q1 |
| LPL Financial LLC added | 10,910 | $2M | 0.1% | 2026-Q1 |
| Colonial Trust Co / SC trimmed | 10,774 | $2M | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans added | 10,733 | $2M | 0.1% | 2026-Q1 |
| Creative Planning trimmed | 10,082 | $2M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 9,027 | $1M | 0.1% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 8,973 | $1M | 0.1% | 2026-Q1 |
| State of Alaska, Department of Revenue added | 8,645 | $1M | 0.1% | 2026-Q1 |
| Mariner, LLC added | 8,581 | $1M | 0.1% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 8,499 | $1M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 8,459 | $1M | 0.1% | 2026-Q1 |
| Strategic Wealth Partners, Ltd. | 8,384 | $1M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 8,225 | $1M | 0.1% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 8,218 | $1M | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC added | 8,209 | $1M | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 8,193 | $1M | 0.1% | 2026-Q1 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ added | 8,141 | $1M | 0.1% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 8,028 | $1M | 0.1% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. added | 7,899 | $1M | 0.1% | 2026-Q1 |
| Freestone Grove Partners LP new | 7,773 | $1M | 0.1% | 2026-Q1 |
| Cerity Partners LLC new | 7,727 | $1M | 0.1% | 2026-Q1 |
| Illinois Municipal Retirement Fund added | 7,624 | $1M | 0.1% | 2026-Q1 |
| Colonial Trust Advisors added | 7,557 | $1M | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 7,409 | $1M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 7,122 | $1M | 0.1% | 2026-Q1 |
| Louisiana State Employees Retirement System added | 7,100 | $1M | 0.1% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD | 7,100 | $1M | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 7,035 | $1M | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 6,963 | $1M | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 6,610 | $1M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 6,509 | $1M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 6,272 | $1M | 0.1% | 2026-Q1 |
| State of Tennessee, Department of Treasury | 6,088 | $995K | 0.1% | 2026-Q1 |
| MBL Wealth, LLC added | 5,937 | $970K | 0.1% | 2026-Q1 |
| Numerai GP LLC trimmed | 5,798 | $948K | 0.1% | 2026-Q1 |
| Atria Investments, Inc trimmed | 5,452 | $891K | 0.1% | 2026-Q1 |
| Sound View Wealth Advisors Group, LLC | 5,393 | $881K | 0.1% | 2026-Q1 |
| Cypress Wealth Services, LLC | 5,250 | $858K | 0.1% | 2026-Q1 |
| Gallagher Fiduciary Advisors, LLC trimmed | 5,131 | $839K | 0.1% | 2026-Q1 |
| Hamilton Capital, LLC added | 5,107 | $835K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 1,525,252 | $232M | 16.5% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 19,305 | $3M | 0.2% | 2025-Q3 stale |
| JANE STREET GROUP, LLC trimmed | 17,998 | $3M | 0.2% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 15,030 | $3M | 0.2% | 2025-Q2 stale |
| D. E. Shaw & Co., Inc. added | 16,300 | $2M | 0.2% | 2025-Q4 stale |
| J.W. COLE ADVISORS, INC. added | 16,028 | $2M | 0.2% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 10,928 | $2M | 0.1% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC trimmed | 9,413 | $2M | 0.1% | 2025-Q2 stale |
| Advisors Capital Management, LLC trimmed | 8,150 | $1M | 0.1% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 7,527 | $1M | 0.1% | 2025-Q1 stale |
| DARK FOREST CAPITAL MANAGEMENT LP added | 7,301 | $1M | 0.1% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 7,082 | $1M | 0.1% | 2025-Q4 stale |
| SteelPeak Wealth, LLC | 5,250 | $853K | 0.1% | 2025-Q3 stale |
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.