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Institutional Ownership · SEC Form 13F

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.

481
Institutional holders
33,698,579
Shares held (tracked funds)
85.9%
Of shares outstanding

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).

FundSharesReported value% of valueQuarter
BlackRock, Inc. trimmed3,796,218$1.2B10.4%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new1,694,488$556M4.6%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new1,654,477$543M4.5%2026-Q1
HBK INVESTMENTS L P new1,634,261$537M4.5%2026-Q1
STATE STREET CORP added1,185,811$389M3.2%2026-Q1
MILLENNIUM MANAGEMENT LLC added1,098,136$361M3.0%2026-Q1
BAILLIE GIFFORD & CO trimmed840,427$276M2.3%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added795,448$261M2.2%2026-Q1
BALYASNY ASSET MANAGEMENT L.P. added762,096$250M2.1%2026-Q1
GOLDMAN SACHS GROUP INC added720,575$237M2.0%2026-Q1
CITIGROUP INC added620,943$204M1.7%2026-Q1
UBS Group AG added560,335$184M1.5%2026-Q1
Invesco Ltd. trimmed520,777$171M1.4%2026-Q1
Champlain Investment Partners, LLC trimmed491,382$161M1.3%2026-Q1
FMR LLC trimmed483,846$159M1.3%2026-Q1
ExodusPoint Capital Management, LP added465,215$153M1.3%2026-Q1
Capital World Investors added450,815$148M1.2%2026-Q1
WHITEBOX ADVISORS LLC new445,001$146M1.2%2026-Q1
AQR Arbitrage LLC new423,073$139M1.2%2026-Q1
TUDOR INVESTMENT CORP ET AL added411,118$135M1.1%2026-Q1
JPMORGAN CHASE & CO trimmed402,619$132M1.1%2026-Q1
MORGAN STANLEY trimmed401,356$132M1.1%2026-Q1
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added400,160$131M1.1%2026-Q1
Hudson Bay Capital Management LP new349,038$115M1.0%2026-Q1
NORGES BANK added427,663$114M1.0%2026-Q1
Amundi added345,758$114M0.9%2026-Q1
DIMENSIONAL FUND ADVISORS LP added325,843$107M0.9%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC added322,416$106M0.9%2026-Q1
NORTHERN TRUST CORP added320,853$105M0.9%2026-Q1
CONGRESS ASSET MANAGEMENT CO trimmed317,337$104M0.9%2026-Q1
NEUBERGER BERMAN GROUP LLC added303,621$100M0.8%2026-Q1
LMR Partners LLP added295,708$97M0.8%2026-Q1
BANK OF AMERICA CORP /DE/ trimmed259,775$85M0.7%2026-Q1
Magnetar Financial LLC added251,433$83M0.7%2026-Q1
VANGUARD FIDUCIARY TRUST CO new247,235$81M0.7%2026-Q1
Bank of New York Mellon Corp trimmed246,527$81M0.7%2026-Q1
Woodline Partners LP added241,597$79M0.7%2026-Q1
ALLIANCEBERNSTEIN L.P. added226,317$70M0.6%2026-Q1
BANK OF NOVA SCOTIA added211,820$70M0.6%2026-Q1
SOROS FUND MANAGEMENT LLC added203,434$67M0.6%2026-Q1
CITADEL ADVISORS LLC trimmed202,725$67M0.6%2026-Q1
D. E. Shaw & Co., Inc. added201,008$66M0.6%2026-Q1
Thrivent Financial for Lutherans trimmed188,129$62M0.5%2026-Q1
CAXTON ASSOCIATES LLP new184,663$61M0.5%2026-Q1
Decagon Asset Management LLP new167,588$55M0.5%2026-Q1
JANUS HENDERSON GROUP PLC trimmed167,054$55M0.5%2026-Q1
Kryger Capital LLC new153,848$51M0.4%2026-Q1
Squarepoint Ops LLC added147,806$49M0.4%2026-Q1
PFM Health Sciences, LP trimmed139,779$46M0.4%2026-Q1
CAPITOLIS LIQUID GLOBAL MARKETS LLC new139,398$46M0.4%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed135,000$44M0.4%2026-Q1
ALPINE ASSOCIATES MANAGEMENT INC. new131,950$43M0.4%2026-Q1
Rock Springs Capital Management LP120,500$40M0.3%2026-Q1
WATER ISLAND CAPITAL LLC new120,095$39M0.3%2026-Q1
NATIXIS added116,229$38M0.3%2026-Q1
Holocene Advisors, LP trimmed110,614$36M0.3%2026-Q1
RHUMBLINE ADVISERS added110,173$36M0.3%2026-Q1
HSBC HOLDINGS PLC added110,173$36M0.3%2026-Q1
BRAIDWELL LP trimmed105,352$35M0.3%2026-Q1
SG Americas Securities, LLC added102,035$34M0.3%2026-Q1
Capula Management Ltd added101,779$33M0.3%2026-Q1
Slotnik Capital, LLC new101,000$33M0.3%2026-Q1
Nuveen, LLC added100,740$33M0.3%2026-Q1
Clearbridge Investments, LLC trimmed97,135$32M0.3%2026-Q1
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added96,715$32M0.3%2026-Q1
Birnam Oak Advisors, LP new95,990$32M0.3%2026-Q1
GLAZER CAPITAL, LLC new94,819$31M0.3%2026-Q1
PRINCIPAL FINANCIAL GROUP INC added88,178$29M0.2%2026-Q1
Sand Grove Capital Management LLP new86,758$28M0.2%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added86,433$28M0.2%2026-Q1
Empyrean Capital Partners, LP new85,000$28M0.2%2026-Q1
Melqart Asset Management (UK) Ltd new81,822$27M0.2%2026-Q1
Allspring Global Investments Holdings, LLC trimmed79,898$26M0.2%2026-Q1
PICTON MAHONEY ASSET MANAGEMENT added80,000$26M0.2%2026-Q1
Alberta Investment Management Corp new80,000$26M0.2%2026-Q1
Westchester Capital Management, LLC new76,630$25M0.2%2026-Q1
AQR CAPITAL MANAGEMENT LLC trimmed76,231$25M0.2%2026-Q1
FIRST TRUST ADVISORS LP added75,223$25M0.2%2026-Q1
Man Group plc trimmed74,670$25M0.2%2026-Q1
Swiss National Bank added73,580$24M0.2%2026-Q1
C WorldWide Group Holding A/S72,000$24M0.2%2026-Q1
CARRET ASSET MANAGEMENT, LLC72,000$24M0.2%2026-Q1
Susquehanna Portfolio Strategies, LLC added70,428$23M0.2%2026-Q1
VANGUARD GROUP INC trimmed3,713,628$1.2B9.6%2025-Q4 stale
RTW INVESTMENTS, LP866,499$269M2.2%2025-Q4 stale
Artisan Partners Limited Partnership added594,112$185M1.5%2025-Q4 stale
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed345,974$108M0.9%2025-Q4 stale
SAMLYN CAPITAL, LLC new212,956$66M0.6%2025-Q4 stale
Jain Global LLC added183,024$57M0.5%2025-Q4 stale
Baird Financial Group, Inc. trimmed145,675$45M0.4%2025-Q4 stale
Stephens Investment Management Group LLC trimmed120,815$38M0.3%2025-Q4 stale
LORD, ABBETT & CO. LLC trimmed115,941$36M0.3%2025-Q4 stale
PERCEPTIVE ADVISORS LLC trimmed110,529$34M0.3%2025-Q4 stale
Alyeska Investment Group, L.P. added101,738$32M0.3%2025-Q4 stale
Integral Health Asset Management, LLC added100,000$31M0.3%2025-Q4 stale
Freestone Grove Partners LP added96,889$30M0.3%2025-Q4 stale
TD Asset Management Inc trimmed88,154$27M0.2%2025-Q4 stale
AXA S.A. added105,870$27M0.2%2025-Q2 stale
Point72 Asset Management, L.P. trimmed80,832$25M0.2%2025-Q4 stale
STEADFAST CAPITAL MANAGEMENT LP new95,000$24M0.2%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.

HoldersTotal shares

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.

Learn how to read institutional ownership