Who owns PEN (PEN)
Which tracked institutional funds hold PEN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PEN 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
185 tracked funds added or opened PEN while 129 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
PEN’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 0.1% of theirs — a 0.1pp gap the other way — the median holder sizes PEN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PEN 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 481 tracked filers holding PEN, 277 increased or opened the position and 229 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 PEN 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 93
- VANGUARD CAPITAL MANAGEMENT LLC$556M
- VANGUARD PORTFOLIO MANAGEMENT LLC$543M
- HBK INVESTMENTS L P$537M
- WHITEBOX ADVISORS LLC$146M
- AQR Arbitrage LLC$139M
- TUDOR INVESTMENT CORP ET AL$135M
Full exits 54
- VANGUARD GROUP INC$1.2B
- RTW INVESTMENTS, LP$269M
- Artisan Partners Limited Partnership$185M
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$108M
- SAMLYN CAPITAL, LLC$66M
- Jain Global LLC$57M
Largest adds
- BALYASNY ASSET MANAGEMENT L.P.$200M
- CITIGROUP INC$189M
- MILLENNIUM MANAGEMENT LLC$150M
- ExodusPoint Capital Management, LP$146M
- GOLDMAN SACHS GROUP INC$138M
- UBS Group AG$137M
Largest trims
- FMR LLC$1.4B
- PRICE T ROWE ASSOCIATES INC /MD/$497M
- CITADEL ADVISORS LLC$241M
- Clearbridge Investments, LLC$183M
- JPMORGAN CHASE & CO$116M
- Holocene Advisors, LP$110M
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 | 3,796,218 | $1.2B | 10.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,694,488 | $556M | 4.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,654,477 | $543M | 4.5% | 2026-Q1 |
| HBK INVESTMENTS L P new | 1,634,261 | $537M | 4.5% | 2026-Q1 |
| STATE STREET CORP added | 1,185,811 | $389M | 3.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,098,136 | $361M | 3.0% | 2026-Q1 |
| BAILLIE GIFFORD & CO trimmed | 840,427 | $276M | 2.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 795,448 | $261M | 2.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 762,096 | $250M | 2.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 720,575 | $237M | 2.0% | 2026-Q1 |
| CITIGROUP INC added | 620,943 | $204M | 1.7% | 2026-Q1 |
| UBS Group AG added | 560,335 | $184M | 1.5% | 2026-Q1 |
| Invesco Ltd. trimmed | 520,777 | $171M | 1.4% | 2026-Q1 |
| Champlain Investment Partners, LLC trimmed | 491,382 | $161M | 1.3% | 2026-Q1 |
| FMR LLC trimmed | 483,846 | $159M | 1.3% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 465,215 | $153M | 1.3% | 2026-Q1 |
| Capital World Investors added | 450,815 | $148M | 1.2% | 2026-Q1 |
| WHITEBOX ADVISORS LLC new | 445,001 | $146M | 1.2% | 2026-Q1 |
| AQR Arbitrage LLC new | 423,073 | $139M | 1.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 411,118 | $135M | 1.1% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 402,619 | $132M | 1.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 401,356 | $132M | 1.1% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 400,160 | $131M | 1.1% | 2026-Q1 |
| Hudson Bay Capital Management LP new | 349,038 | $115M | 1.0% | 2026-Q1 |
| NORGES BANK added | 427,663 | $114M | 1.0% | 2026-Q1 |
| Amundi added | 345,758 | $114M | 0.9% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 325,843 | $107M | 0.9% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 322,416 | $106M | 0.9% | 2026-Q1 |
| NORTHERN TRUST CORP added | 320,853 | $105M | 0.9% | 2026-Q1 |
| CONGRESS ASSET MANAGEMENT CO trimmed | 317,337 | $104M | 0.9% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 303,621 | $100M | 0.8% | 2026-Q1 |
| LMR Partners LLP added | 295,708 | $97M | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 259,775 | $85M | 0.7% | 2026-Q1 |
| Magnetar Financial LLC added | 251,433 | $83M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 247,235 | $81M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 246,527 | $81M | 0.7% | 2026-Q1 |
| Woodline Partners LP added | 241,597 | $79M | 0.7% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 226,317 | $70M | 0.6% | 2026-Q1 |
| BANK OF NOVA SCOTIA added | 211,820 | $70M | 0.6% | 2026-Q1 |
| SOROS FUND MANAGEMENT LLC added | 203,434 | $67M | 0.6% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 202,725 | $67M | 0.6% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 201,008 | $66M | 0.6% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 188,129 | $62M | 0.5% | 2026-Q1 |
| CAXTON ASSOCIATES LLP new | 184,663 | $61M | 0.5% | 2026-Q1 |
| Decagon Asset Management LLP new | 167,588 | $55M | 0.5% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 167,054 | $55M | 0.5% | 2026-Q1 |
| Kryger Capital LLC new | 153,848 | $51M | 0.4% | 2026-Q1 |
| Squarepoint Ops LLC added | 147,806 | $49M | 0.4% | 2026-Q1 |
| PFM Health Sciences, LP trimmed | 139,779 | $46M | 0.4% | 2026-Q1 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC new | 139,398 | $46M | 0.4% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 135,000 | $44M | 0.4% | 2026-Q1 |
| ALPINE ASSOCIATES MANAGEMENT INC. new | 131,950 | $43M | 0.4% | 2026-Q1 |
| Rock Springs Capital Management LP | 120,500 | $40M | 0.3% | 2026-Q1 |
| WATER ISLAND CAPITAL LLC new | 120,095 | $39M | 0.3% | 2026-Q1 |
| NATIXIS added | 116,229 | $38M | 0.3% | 2026-Q1 |
| Holocene Advisors, LP trimmed | 110,614 | $36M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 110,173 | $36M | 0.3% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 110,173 | $36M | 0.3% | 2026-Q1 |
| BRAIDWELL LP trimmed | 105,352 | $35M | 0.3% | 2026-Q1 |
| SG Americas Securities, LLC added | 102,035 | $34M | 0.3% | 2026-Q1 |
| Capula Management Ltd added | 101,779 | $33M | 0.3% | 2026-Q1 |
| Slotnik Capital, LLC new | 101,000 | $33M | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 100,740 | $33M | 0.3% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 97,135 | $32M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 96,715 | $32M | 0.3% | 2026-Q1 |
| Birnam Oak Advisors, LP new | 95,990 | $32M | 0.3% | 2026-Q1 |
| GLAZER CAPITAL, LLC new | 94,819 | $31M | 0.3% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 88,178 | $29M | 0.2% | 2026-Q1 |
| Sand Grove Capital Management LLP new | 86,758 | $28M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 86,433 | $28M | 0.2% | 2026-Q1 |
| Empyrean Capital Partners, LP new | 85,000 | $28M | 0.2% | 2026-Q1 |
| Melqart Asset Management (UK) Ltd new | 81,822 | $27M | 0.2% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC trimmed | 79,898 | $26M | 0.2% | 2026-Q1 |
| PICTON MAHONEY ASSET MANAGEMENT added | 80,000 | $26M | 0.2% | 2026-Q1 |
| Alberta Investment Management Corp new | 80,000 | $26M | 0.2% | 2026-Q1 |
| Westchester Capital Management, LLC new | 76,630 | $25M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 76,231 | $25M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 75,223 | $25M | 0.2% | 2026-Q1 |
| Man Group plc trimmed | 74,670 | $25M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 73,580 | $24M | 0.2% | 2026-Q1 |
| C WorldWide Group Holding A/S | 72,000 | $24M | 0.2% | 2026-Q1 |
| CARRET ASSET MANAGEMENT, LLC | 72,000 | $24M | 0.2% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC added | 70,428 | $23M | 0.2% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 3,713,628 | $1.2B | 9.6% | 2025-Q4 stale |
| RTW INVESTMENTS, LP | 866,499 | $269M | 2.2% | 2025-Q4 stale |
| Artisan Partners Limited Partnership added | 594,112 | $185M | 1.5% | 2025-Q4 stale |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 345,974 | $108M | 0.9% | 2025-Q4 stale |
| SAMLYN CAPITAL, LLC new | 212,956 | $66M | 0.6% | 2025-Q4 stale |
| Jain Global LLC added | 183,024 | $57M | 0.5% | 2025-Q4 stale |
| Baird Financial Group, Inc. trimmed | 145,675 | $45M | 0.4% | 2025-Q4 stale |
| Stephens Investment Management Group LLC trimmed | 120,815 | $38M | 0.3% | 2025-Q4 stale |
| LORD, ABBETT & CO. LLC trimmed | 115,941 | $36M | 0.3% | 2025-Q4 stale |
| PERCEPTIVE ADVISORS LLC trimmed | 110,529 | $34M | 0.3% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. added | 101,738 | $32M | 0.3% | 2025-Q4 stale |
| Integral Health Asset Management, LLC added | 100,000 | $31M | 0.3% | 2025-Q4 stale |
| Freestone Grove Partners LP added | 96,889 | $30M | 0.3% | 2025-Q4 stale |
| TD Asset Management Inc trimmed | 88,154 | $27M | 0.2% | 2025-Q4 stale |
| AXA S.A. added | 105,870 | $27M | 0.2% | 2025-Q2 stale |
| Point72 Asset Management, L.P. trimmed | 80,832 | $25M | 0.2% | 2025-Q4 stale |
| STEADFAST CAPITAL MANAGEMENT LP new | 95,000 | $24M | 0.2% | 2025-Q2 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.