Who owns Xencor, Inc. (XNCR)
Which tracked institutional funds hold XNCR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See XNCR 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
The tracked-fund tape on XNCR is one-sided between 2025-Q4 and 2026-Q1: 22 added or opened and 74 trimmed or exited — on balance reducing.
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
XNCR’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 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes XNCR more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in XNCR 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 204 tracked filers holding XNCR, 97 increased or opened the position and 94 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 XNCR 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 11
- RA CAPITAL MANAGEMENT, L.P.$59M
- VANGUARD PORTFOLIO MANAGEMENT LLC$42M
- VANGUARD CAPITAL MANAGEMENT LLC$37M
- VANGUARD FIDUCIARY TRUST CO$6M
- Velan Capital Investment Management LP$3M
- OP Asset Management Ltd$768K
Full exits 12
- VANGUARD GROUP INC$102M
- Defilade Capital Management, L.P.$22M
- TWO SIGMA ADVISERS, LP$8M
- BRAIDWELL LP$7M
- Woodline Partners LP$3M
- Rhenman & Partners Asset Management AB$3M
Largest adds
- TWO SIGMA INVESTMENTS, LP$6M
- UBS Group AG$3M
- EverSource Wealth Advisors, LLC$2M
- GSA CAPITAL PARTNERS LLP$1M
- NORGES BANK$983K
- Man Group plc$838K
Largest trims
- PRIMECAP MANAGEMENT CO/CA/$32M
- BlackRock, Inc.$25M
- EcoR1 Capital, LLC$23M
- BVF INC/IL$23M
- RTW INVESTMENTS, LP$22M
- STATE STREET CORP$17M
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. added | 13,035,918 | $157M | 13.1% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ added | 10,338,022 | $125M | 10.4% | 2026-Q1 |
| BVF INC/IL | 7,133,720 | $86M | 7.2% | 2026-Q1 |
| RTW INVESTMENTS, LP | 6,777,461 | $82M | 6.8% | 2026-Q1 |
| RA CAPITAL MANAGEMENT, L.P. added | 4,897,237 | $59M | 4.9% | 2026-Q1 |
| STATE STREET CORP trimmed | 4,352,036 | $52M | 4.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,500,342 | $42M | 3.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,101,647 | $37M | 3.1% | 2026-Q1 |
| TCG Crossover Management, LLC | 2,452,138 | $30M | 2.5% | 2026-Q1 |
| EcoR1 Capital, LLC trimmed | 2,183,000 | $26M | 2.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,815,577 | $22M | 1.8% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,560,420 | $19M | 1.6% | 2026-Q1 |
| MORGAN STANLEY added | 1,558,290 | $19M | 1.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,294,887 | $16M | 1.3% | 2026-Q1 |
| BAKER BROS. ADVISORS LP | 1,102,106 | $13M | 1.1% | 2026-Q1 |
| UBS Group AG added | 1,082,419 | $13M | 1.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 1,066,780 | $13M | 1.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 805,421 | $10M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 763,793 | $9M | 0.8% | 2026-Q1 |
| JOHNSON & JOHNSON | 748,062 | $9M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP added | 744,519 | $9M | 0.7% | 2026-Q1 |
| Jefferies Financial Group Inc. | 720,440 | $9M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 696,854 | $8M | 0.7% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 620,756 | $7M | 0.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 609,788 | $7M | 0.6% | 2026-Q1 |
| Lynx1 Capital Management LP trimmed | 536,398 | $6M | 0.5% | 2026-Q1 |
| TORONTO DOMINION BANK | 491,000 | $6M | 0.5% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 487,320 | $6M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 471,076 | $6M | 0.5% | 2026-Q1 |
| Erste Asset Management GmbH trimmed | 430,200 | $5M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 395,941 | $5M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 377,699 | $5M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 366,093 | $4M | 0.4% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 347,078 | $4M | 0.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 293,080 | $4M | 0.3% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 291,624 | $4M | 0.3% | 2026-Q1 |
| Nantahala Capital Management, LLC added | 264,639 | $3M | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 263,844 | $3M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 255,472 | $3M | 0.3% | 2026-Q1 |
| Velan Capital Investment Management LP new | 250,000 | $3M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 223,669 | $3M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 218,354 | $3M | 0.2% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 200,000 | $2M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 201,890 | $2M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 175,177 | $2M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 170,461 | $2M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 155,807 | $2M | 0.2% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 138,124 | $2M | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 134,778 | $2M | 0.1% | 2026-Q1 |
| EverSource Wealth Advisors, LLC added | 37,363 | $2M | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 128,558 | $2M | 0.1% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 121,342 | $1M | 0.1% | 2026-Q1 |
| FMR LLC added | 111,891 | $1M | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 106,699 | $1M | 0.1% | 2026-Q1 |
| WINTON GROUP Ltd added | 104,713 | $1M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 104,299 | $1M | 0.1% | 2026-Q1 |
| DCF Advisers, LLC trimmed | 103,736 | $1M | 0.1% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 102,987 | $1M | 0.1% | 2026-Q1 |
| Swiss National Bank trimmed | 98,800 | $1M | 0.1% | 2026-Q1 |
| Essex LLC | 98,661 | $1M | 0.1% | 2026-Q1 |
| NORGES BANK added | 108,874 | $1M | 0.1% | 2026-Q1 |
| Man Group plc added | 93,694 | $1M | 0.1% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 93,665 | $1M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 92,098 | $1M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 72,090 | $1M | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 82,534 | $995K | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 80,899 | $976K | 0.1% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 80,490 | $971K | 0.1% | 2026-Q1 |
| Seven Fleet Capital Management LP trimmed | 80,000 | $965K | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 75,580 | $911K | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 74,190 | $895K | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 68,187 | $822K | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC trimmed | 67,566 | $815K | 0.1% | 2026-Q1 |
| OP Asset Management Ltd new | 55,082 | $768K | 0.1% | 2026-Q1 |
| TD Asset Management Inc trimmed | 62,174 | $750K | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 61,273 | $739K | 0.1% | 2026-Q1 |
| ALPS ADVISORS INC added | 59,702 | $720K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 6,630,641 | $102M | 8.5% | 2025-Q4 stale |
| Defilade Capital Management, L.P. new | 1,414,755 | $22M | 1.8% | 2025-Q4 stale |
| LOOMIS SAYLES & CO L P trimmed | 1,069,762 | $11M | 0.9% | 2025-Q1 stale |
| Logos Global Management LP trimmed | 1,250,000 | $10M | 0.8% | 2025-Q2 stale |
| TWO SIGMA ADVISERS, LP trimmed | 506,600 | $8M | 0.6% | 2025-Q4 stale |
| BRAIDWELL LP trimmed | 459,166 | $7M | 0.6% | 2025-Q4 stale |
| Finepoint Capital LP trimmed | 642,200 | $7M | 0.6% | 2025-Q1 stale |
| Aberdeen Group plc | 558,810 | $7M | 0.5% | 2025-Q3 stale |
| Deep Track Capital, LP | 549,439 | $6M | 0.5% | 2025-Q3 stale |
| MACQUARIE GROUP LTD added | 400,000 | $4M | 0.3% | 2025-Q3 stale |
| Woodline Partners LP | 193,117 | $3M | 0.2% | 2025-Q4 stale |
| Squarepoint Ops LLC trimmed | 216,739 | $3M | 0.2% | 2025-Q3 stale |
| Rhenman & Partners Asset Management AB | 165,750 | $3M | 0.2% | 2025-Q4 stale |
| Walleye Capital LLC new | 248,706 | $2M | 0.2% | 2025-Q2 stale |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 142,917 | $2M | 0.1% | 2025-Q1 stale |
| Y-Intercept (Hong Kong) Ltd added | 123,138 | $1M | 0.1% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 99,902 | $1M | 0.1% | 2025-Q3 stale |
| NEOS Investment Management LLC new | 61,362 | $939K | 0.1% | 2025-Q4 stale |
| TEMA ETFS LLC new | 60,457 | $926K | 0.1% | 2025-Q4 stale |
| Point72 Asset Management, L.P. added | 55,339 | $847K | 0.1% | 2025-Q4 stale |
| DekaBank Deutsche Girozentrale | 31,800 | $775K | 0.1% | 2025-Q4 stale |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 64,184 | $753K | 0.1% | 2025-Q3 stale |
| Schonfeld Strategic Advisors LLC added | 47,848 | $733K | 0.1% | 2025-Q4 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.