Among active 13F managers last quarter, 13 opened and 14 added, while 9 reduced; the largest holder to move was Marshall Wace, LLP (+180%). Over the last 180 days, 2 insiders bought and none sold, a net +$36K in open-market trades.
Funds lean in and no leg opposes.
93 tracked 13F filers disclose a position in IMRX as of the latest SEC 13F filings, a combined $160.1M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 9.7M | $48.4M | ▲+0.1% Added · +7K sh | Q2 2026 | |
| 2 | BlackRock, Inc. | 4.4M | $21.8M | ▲+190% Added · +2.9M sh | Q2 2026 | |
| 3 | Sanofi | 2.7M | $13.5M | —Held | Q2 2026 | |
| 4 | Vanguard Capital Management LLC | 2.3M | $11.4M | ▼−0.1% Reduced · −2K sh | Q2 2026 | |
| 5 | Marshall Wace, LLP | 2.0M | $10.5M | ▲+180% Added · +1.3M sh | Q1 2026 | |
| 6 | Price T Rowe Associates Inc | 1.9M | Withheld | ▲+5.8% Added · +107K sh | Q2 2026 | |
| 7 | Geode Capital Management, LLC | 1.4M | $6.8M | ▲+115% Added · +733K sh | Q2 2026 | |
| 8 | Millennium Management LLC | 1.1M | $5.8M | ▲22× Added · +1.1M sh | Q1 2026 | |
| 9 | State Street Corp | 1.0M | $5.0M | ▲+273% Added · +733K sh | Q2 2026 | |
| 10 | Connor, Clark & Lunn Investment Management Ltd. | 601K | $3.0M | ▲+50% Added · +201K sh | Q2 2026 | |
| 11 | Alethea Capital Management, LLC | 473K | $2.4M | ▲21× Added · +450K sh | Q2 2026 | |
| 12 | Summit Financial, LLC | 452K | $2.3M | ▲+20% Added · +76K sh | Q2 2026 | |
| 13 | Levin Capital Strategies, L.P. | 414K | $2.1M | ▲41× Added · +404K sh | Q2 2026 | |
| 14 | Citadel Advisors LLC | 386K | $1.9M | ▼−14% Reduced · −61K sh | Q2 2026 | |
| 15 | UBS Group AG | 376K | $2.0M | ▲+98% Added · +186K sh | Q1 2026 | |
| 16 | Vanguard Fiduciary Trust Co | 361K | $1.8M | ▲+12% Added · +39K sh | Q2 2026 | |
| 17 | Vanguard Portfolio Management LLC | 359K | $1.8M | ▲New +359K sh | Q2 2026 | |
| 18 | Goldman Sachs Group Inc | 328K | $1.7M | ▲+2.8% Added · +9K sh | Q1 2026 | |
| 19 | Morgan Stanley | 296K | $1.6M | ▼−40% Reduced · −194K sh | Q1 2026 | |
| 20 | Occam Crest Management LP | 278K | $1.1M | ▼−49% Reduced · −267K sh | Q2 2026 | |
| 21 | Two Sigma Investments, LP | 245K | $1.3M | ▲+18% Added · +38K sh | Q1 2026 | |
| 22 | Squarepoint Ops LLC | 226K | $1.2M | ▲+145% Added · +134K sh | Q1 2026 | |
| 23 | Bank Of America Corp | 151K | $795K | ▼−30% Reduced · −63K sh | Q1 2026 | |
| 24 | Permanent Capital Management, LP | 150K | $749K | ▲New +150K sh | Q2 2026 | |
| 25 | PVG Asset Management Corp | 146K | $731K | ▼−0.1% Reduced · −210 sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership. 1 value row is withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 13 funds opened a new position in IMRX and 14 added to an existing one, while 9 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Nvidia CorpNVDA | 42 funds | $98.5B |
| Microsoft CorpMSFT | 41 funds | $61.8B |
| Amazon.com IncAMZN | 40 funds | $42.4B |
| Apple IncAAPL | 39 funds | $75.3B |
| Broadcom IncAVGO | 39 funds | $37.8B |
| Tesla IncTSLA | 39 funds | $18.7B |
| Micron Technology IncMU | 39 funds | $9.1B |
| Berkshire Hathaway Inc-CL BBRK/B | 39 funds | $8.6B |
| Meta Platforms Inc-Class AMETA | 38 funds | $28.6B |
| Alphabet Inc-CL CGOOG | 38 funds | $27.4B |
| JPMorgan Chase & CoJPM | 38 funds | $14.0B |
| Bank Of America CorpBAC | 38 funds | $7.0B |
Ranked by how many of IMRX's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in IMRX.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 23, 2026 | Zeskind Benjamin J. | PRESIDENT AND CEO, Director | Buy (P) | 2K | $11K |
| Jun 15, 2026 | Hall Brett Matthew | CHIEF SCIENTIFIC OFFICER | Buy (P) | 6K | $25K |
| Jan 16, 2026 | Brakewood Harold Eugene | Chief Business Officer | Buy (P) | 5K | $25K |
| Jan 15, 2026 | Hall Brett Matthew | CHIEF SCIENTIFIC OFFICER | Buy (P) | 2K | $11K |
| Jan 15, 2026 | Schall Thomas J. | Director | Buy (P) | 22K | $101K |
| Jan 13, 2026 | Neufeld Leah R | CHIEF PEOPLE OFFICER | Buy (P) | 3K | $11K |
| Jan 12, 2026 | Feinberg Peter | Director | Buy (P) | 20K | $87K |
| Oct 3, 2025 | Feinberg Peter | Director | Buy (P) | 8K | $50K |
| Oct 1, 2025 | Bookman Michael | CHIEF LEGAL OFFICER, SECRETARY | Buy (P) | 1K | $7K |
| Oct 1, 2025 | Neufeld Leah R | CHIEF PEOPLE OFFICER | Buy (P) | 800 | $5K |
| Oct 1, 2025 | Morales Mallory | Chief Accounting Officer | Buy (P) | 300 | $2K |
| Sep 30, 2025 | Feinberg Peter | Director | Buy (P) | 8K | $53K |
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 30 | 19 | – |
Insiders Form 4 open-market | 2 | 0 | +$36K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for IMRX
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/IMRX/capital-change-brief"
Use Arkolith's capital_change_brief for IMRX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + the live filing stream, joined for IMRX. Filings are public domain, sourced to SEC EDGAR.