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Institutional Ownership · SEC Form 13F

Who owns IPSC (IPSC)


Which tracked institutional funds hold IPSC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See IPSC 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.

71
Institutional holders
137,351,574
Shares held (tracked funds)

How the tape is positioned

The tracked-fund tape on IPSC is one-sided between 2025-Q4 and 2026-Q1: 31 added or opened and 3 trimmed or exited — on balance accumulating.

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

IPSC’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 0.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in IPSC 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 71 tracked filers holding IPSC, 47 increased or opened the position and 18 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 IPSC 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 15

  • RA CAPITAL MANAGEMENT, L.P.$40M
  • TCG Crossover Management, LLC$39M
  • Versant Venture Management, LLC$27M
  • Deep Track Capital, LP$21M
  • RTW INVESTMENTS, LP$20M
  • Venrock Adviser, LLC$20M

Full exits 2

  • VANGUARD GROUP INC$2M
  • TWO SIGMA ADVISERS, LP$1M

Largest adds

  • MILLENNIUM MANAGEMENT LLC$10M
  • Spruce Street Capital LP$8M
  • Point72 Asset Management, L.P.$8M
  • ADAGE CAPITAL PARTNERS GP, L.L.C.$7M
  • TWO SIGMA INVESTMENTS, LP$4M
  • BlackRock, Inc.$3M

Largest trims

  • ACADIAN ASSET MANAGEMENT LLC$582K

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
RA CAPITAL MANAGEMENT, L.P. added17,754,430$40M12.7%2026-Q1
TCG Crossover Management, LLC new17,754,430$39M12.4%2026-Q1
Versant Venture Management, LLC new12,166,109$27M8.7%2026-Q1
Deep Track Capital, LP added9,487,745$21M6.8%2026-Q1
Commodore Capital LP new8,695,652$20M6.2%2026-Q1
RTW INVESTMENTS, LP new8,695,652$20M6.2%2026-Q1
Venrock Adviser, LLC added8,695,652$20M6.2%2026-Q1
Point72 Asset Management, L.P. added5,964,678$13M4.3%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new5,686,204$13M4.1%2026-Q1
BALYASNY ASSET MANAGEMENT L.P. new5,017,733$11M3.6%2026-Q1
MILLENNIUM MANAGEMENT LLC added4,667,063$11M3.3%2026-Q1
Spruce Street Capital LP added4,059,054$9M2.9%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. added3,789,538$9M2.7%2026-Q1
Woodline Partners LP added3,043,478$7M2.2%2026-Q1
Seven Fleet Capital Management LP new2,947,826$7M2.1%2026-Q1
Trails Edge Capital Partners, LP new2,449,993$6M1.8%2026-Q1
DAFNA Capital Management LLC trimmed2,434,353$6M1.7%2026-Q1
TWO SIGMA INVESTMENTS, LP added2,371,430$5M1.7%2026-Q1
BlackRock, Inc. added1,524,422$3M1.1%2026-Q1
Rock Springs Capital Management LP new1,304,347$3M0.9%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added1,301,664$3M0.9%2026-Q1
Casdin Capital, LLC1,228,190$3M0.9%2026-Q1
Syncona Portfolio Ltd1,213,056$3M0.9%2026-Q1
RENAISSANCE TECHNOLOGIES LLC trimmed906,827$2M0.6%2026-Q1
VANGUARD FIDUCIARY TRUST CO new692,963$2M0.5%2026-Q1
MARSHALL WACE, LLP added673,584$2M0.5%2026-Q1
STATE STREET CORP added386,723$874K0.3%2026-Q1
ACADIAN ASSET MANAGEMENT LLC trimmed278,075$627K0.2%2026-Q1
NORTHERN TRUST CORP added230,820$522K0.2%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP added226,687$512K0.2%2026-Q1
GOLDMAN SACHS GROUP INC added210,482$476K0.2%2026-Q1
BANK OF AMERICA CORP /DE/ added145,099$328K0.1%2026-Q1
BARCLAYS PLC added120,232$272K0.1%2026-Q1
Squarepoint Ops LLC trimmed119,504$270K0.1%2026-Q1
SUPERSTRING CAPITAL MANAGEMENT LP trimmed119,308$270K0.1%2026-Q1
Brevan Howard Capital Management LP new96,641$218K0.1%2026-Q1
RAYMOND JAMES FINANCIAL INC91,323$206K0.1%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed79,415$179K0.1%2026-Q1
GSA CAPITAL PARTNERS LLP trimmed76,836$174K0.1%2026-Q1
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC77,797$166K0.1%2026-Q1
Invesco Ltd. new62,109$140K0.0%2026-Q1
AMERICAN CENTURY COMPANIES INC new58,742$133K0.0%2026-Q1
DIMENSIONAL FUND ADVISORS LP added55,183$122K0.0%2026-Q1
Cannon Global Investment Management, LLC new49,000$111K0.0%2026-Q1
OMERS ADMINISTRATION Corp new47,800$108K0.0%2026-Q1
Vanguard Global Advisers, LLC new44,616$101K0.0%2026-Q1
Tower Research Capital LLC (TRC) added32,987$75K0.0%2026-Q1
HarbourVest Partners LLC29,018$66K0.0%2026-Q1
Parametrica Management Ltd27,840$63K0.0%2026-Q1
MORGAN STANLEY added26,249$59K0.0%2026-Q1
PRUDENTIAL FINANCIAL INC trimmed25,300$57K0.0%2026-Q1
XTX Topco Ltd added22,518$51K0.0%2026-Q1
Quadrant Private Wealth Management, LLC added20,022$45K0.0%2026-Q1
UBS Group AG trimmed14,215$32K0.0%2026-Q1
Bank of New York Mellon Corp trimmed12,897$29K0.0%2026-Q1
SIMPLEX TRADING, LLC added9,028$20K0.0%2026-Q1
FMR LLC trimmed8,779$20K0.0%2026-Q1
Advisors Asset Management, Inc.8,313$19K0.0%2026-Q1
ROYAL BANK OF CANADA added4,394$9K0.0%2026-Q1
Farther Finance Advisors, LLC new2,500$5K0.0%2026-Q1
BNP PARIBAS FINANCIAL MARKETS trimmed1,418$3K0.0%2026-Q1
SBI Securities Co., Ltd. trimmed1,260$3K0.0%2026-Q1
VANGUARD GROUP INC2,103,869$2M0.7%2025-Q4 stale
Bain Capital Life Sciences Investors, LLC trimmed3,538,609$2M0.6%2025-Q3 stale
TWO SIGMA ADVISERS, LP added1,267,700$1M0.4%2025-Q4 stale
TANG CAPITAL MANAGEMENT LLC900,000$448K0.1%2025-Q3 stale
CITADEL ADVISORS LLC trimmed319,457$318K0.1%2025-Q4 stale
BAKER BROS. ADVISORS LP trimmed241,684$115K0.0%2025-Q1 stale
ALGERT GLOBAL LLC new76,800$76K0.0%2025-Q4 stale
Nuveen, LLC new157,311$75K0.0%2025-Q1 stale
Y-Intercept (Hong Kong) Ltd new89,975$50K0.0%2025-Q2 stale
DEUTSCHE BANK AG\ trimmed96,140$46K0.0%2025-Q1 stale
JANE STREET GROUP, LLC trimmed45,194$45K0.0%2025-Q4 stale
PANAGORA ASSET MANAGEMENT INC trimmed90,739$43K0.0%2025-Q1 stale
LAZARD ASSET MANAGEMENT LLC added62,947$35K0.0%2025-Q2 stale
SEI INVESTMENTS CO52,748$25K0.0%2025-Q1 stale
RHUMBLINE ADVISERS added43,273$21K0.0%2025-Q1 stale
INTECH INVESTMENT MANAGEMENT LLC added35,814$17K0.0%2025-Q1 stale
BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed26,700$15K0.0%2025-Q2 stale
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added27,447$13K0.0%2025-Q1 stale
IEQ CAPITAL, LLC trimmed22,419$13K0.0%2025-Q2 stale
Scientech Research LLC new12,355$12K0.0%2025-Q4 stale
SG Americas Securities, LLC added25,314$12K0.0%2025-Q1 stale
BLUEFIN CAPITAL MANAGEMENT, LLC new24,018$12K0.0%2025-Q3 stale
Corebridge Financial, Inc. trimmed22,925$11K0.0%2025-Q1 stale
Abel Hall, LLC added17,582$10K0.0%2025-Q2 stale
ALLIANCEBERNSTEIN L.P.20,020$10K0.0%2025-Q1 stale
HRT FINANCIAL LP trimmed18,113$9K0.0%2025-Q3 stale
Point72 Asia (Singapore) Pte. Ltd. trimmed17,861$9K0.0%2025-Q3 stale
Qube Research & Technologies Ltd trimmed17,501$9K0.0%2025-Q3 stale
PRICE T ROWE ASSOCIATES INC /MD/14,882$8K0.0%2025-Q1 stale
Cerity Partners LLC new14,260$7K0.0%2025-Q1 stale
TWO SIGMA SECURITIES, LLC new11,767$7K0.0%2025-Q2 stale
NEW YORK STATE COMMON RETIREMENT FUND13,743$7K0.0%2025-Q1 stale
Ground Swell Capital, LLC new10,176$6K0.0%2025-Q2 stale
Jain Global LLC trimmed11,241$6K0.0%2025-Q3 stale
AQR CAPITAL MANAGEMENT LLC trimmed10,660$5K0.0%2025-Q3 stale
CIBC WORLD MARKETS CORP new10,384$5K0.0%2025-Q1 stale
ProShare Advisors LLC trimmed10,131$5K0.0%2025-Q1 stale
PNC Financial Services Group, Inc. new7,027$3K0.0%2025-Q1 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