Who owns Monopar Therapeutics Inc. (MNPR)
Which tracked institutional funds hold MNPR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MNPR company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
22 tracked funds added or opened MNPR while 19 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
MNPR’s largest tracked holder by dollar value, JANUS HENDERSON GROUP PLC, 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 MNPR 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 81 tracked filers holding MNPR, 53 increased or opened the position and 31 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 MNPR 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 8
- VANGUARD CAPITAL MANAGEMENT LLC$12M
- Sio Capital Management, LLC$10M
- Vestal Point Capital, LP$4M
- Walleye Capital LLC$3M
- VANGUARD PORTFOLIO MANAGEMENT LLC$3M
- SILVERARC CAPITAL MANAGEMENT, LLC$2M
Full exits 4
- VANGUARD GROUP INC$19M
- Deep Track Capital, LP$6M
- RENAISSANCE TECHNOLOGIES LLC$746K
- Virtu Financial LLC$654K
Largest adds
- DEERFIELD MANAGEMENT COMPANY, L.P.$7M
- Polar Capital Holdings Plc$6M
- BALYASNY ASSET MANAGEMENT L.P.$5M
- CITADEL ADVISORS LLC$3M
- Alyeska Investment Group, L.P.$3M
- BANK OF AMERICA CORP /DE/$3M
Largest trims
- ADAGE CAPITAL PARTNERS GP, L.L.C.$25M
- JANUS HENDERSON GROUP PLC$14M
- RA CAPITAL MANAGEMENT, L.P.$7M
- WELLINGTON MANAGEMENT GROUP LLP$6M
- Saturn V Capital Management LP$2M
- MILLENNIUM MANAGEMENT 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 |
|---|---|---|---|---|
| JANUS HENDERSON GROUP PLC | 1,317,410 | $72M | 18.6% | 2026-Q1 |
| RA CAPITAL MANAGEMENT, L.P. | 667,207 | $37M | 9.4% | 2026-Q1 |
| Saturn V Capital Management LP added | 345,626 | $19M | 4.9% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. added | 323,745 | $18M | 4.6% | 2026-Q1 |
| BlackRock, Inc. added | 316,567 | $17M | 4.5% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 309,195 | $17M | 4.4% | 2026-Q1 |
| Siren, L.L.C. added | 270,118 | $15M | 3.8% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 264,278 | $14M | 3.7% | 2026-Q1 |
| Polar Capital Holdings Plc added | 226,526 | $12M | 3.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 218,463 | $12M | 3.1% | 2026-Q1 |
| Sio Capital Management, LLC new | 173,506 | $10M | 2.5% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 153,938 | $8M | 2.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 136,443 | $7M | 1.9% | 2026-Q1 |
| TCG Crossover Management, LLC trimmed | 132,103 | $7M | 1.9% | 2026-Q1 |
| Alyeska Investment Group, L.P. added | 100,000 | $5M | 1.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 99,918 | $5M | 1.4% | 2026-Q1 |
| Vivo Capital, LLC | 90,500 | $5M | 1.3% | 2026-Q1 |
| STATE STREET CORP added | 88,355 | $5M | 1.3% | 2026-Q1 |
| Bank of New York Mellon Corp added | 78,618 | $4M | 1.1% | 2026-Q1 |
| Vestal Point Capital, LP new | 65,418 | $4M | 0.9% | 2026-Q1 |
| Walleye Capital LLC new | 63,119 | $3M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 59,699 | $3M | 0.8% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 58,436 | $3M | 0.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 52,951 | $3M | 0.7% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 47,702 | $3M | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 45,987 | $3M | 0.7% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC new | 43,488 | $2M | 0.6% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 42,434 | $2M | 0.6% | 2026-Q1 |
| UBS Group AG added | 39,436 | $2M | 0.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 34,710 | $2M | 0.5% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 33,156 | $2M | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 31,862 | $2M | 0.5% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 28,822 | $2M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 28,447 | $2M | 0.4% | 2026-Q1 |
| BARCLAYS PLC added | 24,935 | $1M | 0.4% | 2026-Q1 |
| Jump Financial, LLC new | 22,808 | $1M | 0.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 22,312 | $1M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC added | 21,754 | $1M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 14,249 | $781K | 0.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 12,558 | $688K | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 9,765 | $535K | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 7,582 | $415K | 0.1% | 2026-Q1 |
| WINTON GROUP Ltd new | 6,829 | $374K | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC new | 6,819 | $374K | 0.1% | 2026-Q1 |
| Informed Momentum Co LLC trimmed | 6,225 | $341K | 0.1% | 2026-Q1 |
| Creative Planning new | 5,987 | $328K | 0.1% | 2026-Q1 |
| TD Asset Management Inc added | 5,884 | $322K | 0.1% | 2026-Q1 |
| GERBER, LLC | 5,601 | $307K | 0.1% | 2026-Q1 |
| Nuveen, LLC | 5,551 | $304K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 4,946 | $271K | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE new | 4,572 | $250K | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP added | 4,434 | $243K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 4,137 | $227K | 0.1% | 2026-Q1 |
| Quadrature Capital Ltd new | 3,673 | $201K | 0.1% | 2026-Q1 |
| Virtus Investment Advisers, LLC added | 3,655 | $200K | 0.1% | 2026-Q1 |
| Your Advocates Ltd., LLP new | 3,344 | $183K | 0.0% | 2026-Q1 |
| MetLife Investment Management, LLC | 2,538 | $139K | 0.0% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 2,422 | $129K | 0.0% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 2,056 | $113K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 1,728 | $95K | 0.0% | 2026-Q1 |
| DIADEMA PARTNERS LP new | 1,630 | $89K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 1,553 | $85K | 0.0% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 1,200 | $66K | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 979 | $54K | 0.0% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey | 964 | $53K | 0.0% | 2026-Q1 |
| Persistent Asset Partners Ltd new | 783 | $43K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 761 | $42K | 0.0% | 2026-Q1 |
| MEEDER ASSET MANAGEMENT INC trimmed | 637 | $35K | 0.0% | 2026-Q1 |
| FMR LLC added | 409 | $22K | 0.0% | 2026-Q1 |
| Legal & General Group Plc trimmed | 408 | $22K | 0.0% | 2026-Q1 |
| Ameritas Investment Partners, Inc. | 300 | $16K | 0.0% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 247 | $14K | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 232 | $13K | 0.0% | 2026-Q1 |
| Allworth Financial LP added | 111 | $6K | 0.0% | 2026-Q1 |
| US BANCORP \DE\ new | 72 | $4K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 293,816 | $19M | 5.0% | 2025-Q4 stale |
| Affinity Asset Advisors, LLC added | 79,483 | $6M | 1.7% | 2025-Q3 stale |
| Deep Track Capital, LP new | 95,408 | $6M | 1.6% | 2025-Q4 stale |
| Ally Bridge Group (NY) LLC added | 64,455 | $5M | 1.4% | 2025-Q3 stale |
| Point72 Asset Management, L.P. trimmed | 104,019 | $4M | 1.0% | 2025-Q2 stale |
| MARSHALL WACE, LLP trimmed | 25,988 | $946K | 0.2% | 2025-Q1 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 11,431 | $746K | 0.2% | 2025-Q4 stale |
| Virtu Financial LLC trimmed | 10,009 | $654K | 0.2% | 2025-Q4 stale |
| MOUNTAIN PACIFIC INVESTMENT ADVISERS LLC new | 6,100 | $398K | 0.1% | 2025-Q4 stale |
| JANE STREET GROUP, LLC new | 10,357 | $377K | 0.1% | 2025-Q1 stale |
| STATE OF WISCONSIN INVESTMENT BOARD new | 5,757 | $376K | 0.1% | 2025-Q4 stale |
| OMERS ADMINISTRATION Corp new | 9,000 | $328K | 0.1% | 2025-Q1 stale |
| HRT FINANCIAL LP trimmed | 8,228 | $299K | 0.1% | 2025-Q1 stale |
| BankChampaign, National Association new | 4,510 | $295K | 0.1% | 2025-Q4 stale |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM new | 3,508 | $286K | 0.1% | 2025-Q3 stale |
| Trexquant Investment LP new | 3,778 | $247K | 0.1% | 2025-Q4 stale |
| Invesco Ltd. new | 3,355 | $219K | 0.1% | 2025-Q4 stale |
| Ikarian Capital, LLC | 5,908 | $215K | 0.1% | 2025-Q1 stale |
| AlphaQuest LLC added | 1,983 | $129K | 0.0% | 2025-Q4 stale |
| CANADA PENSION PLAN INVESTMENT BOARD new | 1,400 | $91K | 0.0% | 2025-Q4 stale |
| Point72 Asia (Singapore) Pte. Ltd. new | 1,761 | $64K | 0.0% | 2025-Q1 stale |
| NewEdge Advisors, LLC | 600 | $39K | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 431 | $15K | 0.0% | 2025-Q2 stale |
| AMALGAMATED BANK added | 144 | $9K | 0.0% | 2025-Q4 stale |
| Point72 (DIFC) Ltd new | 196 | $7K | 0.0% | 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.
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.