Xencor, Inc. (XNCR) Ownership
XNCR ownership summary
as of October 18, 2026- Institutions
- 114.6% of shares outstanding
- Insiders
- 1.22% of shares outstanding
- Shares outstanding
- 74.4M
- Float
- 54.3M shares available to trade
- Short interest
- 31.23% 16.4M shares short
- Days to cover
- 11.27 short interest up 3.9% vs prior month
- Institutions 114.59%
- Insiders 1.22%
XNCR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 18.36% | 13.7M | $311.9M | +615,343 (+4.7%) | June 30, 2026 |
| 2 | PRIMECAP Management Company | 13.69% | 10.2M | $232.6M | −156,700 (−1.5%) | June 30, 2026 |
| 3 | Bvf Inc | 9.59% | 7.1M | $163.0M | — | June 30, 2026 |
| 4 | RTW INVESTMENTS, LLC | 9.12% | 6.8M | $154.9M | — | June 30, 2026 |
| 5 | RA Capital Management, LLC | 7.09% | 5.3M | $120.5M | +377,037 (+7.7%) | June 30, 2026 |
| 6 | State Street Corp | 6.66% | 5.0M | $113.2M | +601,980 (+13.8%) | June 30, 2026 |
| 7 | Vanguard Capital Management, LLC | 4.41% | 3.3M | $74.9M | +177,155 (+5.7%) | June 30, 2026 |
| 8 | TCG Crossover Management, LLC | 3.30% | 2.5M | $56.0M | — | June 30, 2026 |
| 9 | T. Rowe Price Associates, Inc. | 3.17% | 2.4M | $53.8M | +795,989 (+51.0%) | June 30, 2026 |
| 10 | Vanguard Portfolio Management, LLC | 2.98% | 2.2M | $50.6M | −1.3M (−36.7%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 2.58% | 1.9M | $43.9M | +105,282 (+5.8%) | June 30, 2026 |
| 12 | Morgan Stanley - Brokerage Accounts | 2.36% | 1.8M | $40.0M | +194,266 (+12.5%) | June 30, 2026 |
| 13 | UBS Group AG | 1.76% | 1.3M | $29.8M | +223,755 (+20.7%) | June 30, 2026 |
| 14 | Baker Bros Advisors LP | 1.48% | 1.1M | $25.2M | — | June 30, 2026 |
| 15 | Legal & General Group PLC | 1.47% | 1.1M | $24.9M | +24,397 (+2.3%) | June 30, 2026 |
| 16 | Dimensional Fund Advisors, Inc. | 1.36% | 1.0M | $23.1M | −283,768 (−21.9%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 1.30% | 969K | $22.1M | +204,985 (+26.8%) | June 30, 2026 |
| 18 | Millennium Management LLC | 1.15% | 854K | $19.5M | +243,889 (+40.0%) | June 30, 2026 |
| 19 | Two Sigma Investments LLC | 1.10% | 820K | $18.7M | +14,094 (+1.7%) | June 30, 2026 |
| 20 | Northern Trust Corp | 1.07% | 794K | $18.1M | +49,760 (+6.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 3.6M shares and 3 cut 1.7M.
XNCR top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | PRIMECAP Odyssey Aggressive Growth | 8.56% | 6.4M | $145.4M | −15,000 (−0.2%) | June 30, 2026 |
| 2 | iShares Core S&P Small-Cap ETF | 5.47% | 4.1M | $93.0M | +1,032 (+0.0%) | September 30, 2026 |
| 3 | PRIMECAP Odyssey Growth | 4.21% | 3.1M | $71.6M | −84,000 (−2.6%) | June 30, 2026 |
| 4 | Vanguard MStar Total Stk Mkt Idx Invest | 3.15% | 2.3M | $53.6M | +2,301 (+0.1%) | August 31, 2026 |
| 5 | iShares Russell 2000 ETF | 2.43% | 1.8M | $41.3M | −20,800 (−1.1%) | September 30, 2026 |
| 6 | State Street® SPDR® S&P® Biotech ETF | 1.77% | 1.3M | $30.0M | −25,100 (−1.9%) | September 30, 2026 |
| 7 | Fidelity Small Cap Index | 1.02% | 761K | $17.4M | +6,681 (+0.9%) | July 31, 2026 |
| 8 | Vanguard US Opportunities Ins USD Acc | 0.92% | 683K | $15.6M | −57,700 (−7.8%) | June 30, 2026 |
| 9 | iShares Russell 2000 Value ETF | 0.88% | 653K | $14.9M | +990 (+0.2%) | September 30, 2026 |
| 10 | State Street SPDR Port S&P 600 Sm CpETF | 0.84% | 627K | $14.3M | — | September 30, 2026 |
| 11 | Vanguard Explorer Inv | 0.80% | 592K | $13.5M | +190,073 (+47.3%) | June 30, 2026 |
| 12 | iShares S&P Small-Cap 600 Value ETF | 0.78% | 578K | $13.2M | — | September 30, 2026 |
| 13 | iShares Biotechnology ETF | 0.73% | 546K | $12.5M | −4,136 (−0.8%) | September 30, 2026 |
| 14 | T. Rowe Price New Horizons | 0.69% | 514K | $11.7M | −63,696 (−11.0%) | September 30, 2026 |
| 15 | Invesco S&P SmallCap Momentum ETF | 0.58% | 434K | $9.9M | — | September 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.54% | 405K | $9.2M | +4,525 (+1.1%) | September 30, 2026 |
| 17 | Vanguard Tax-Managed Small Cap Adm | 0.53% | 392K | $9.0M | — | September 30, 2026 |
| 18 | Fidelity Extended Market Index | 0.49% | 362K | $8.3M | −4,253 (−1.2%) | August 31, 2026 |
| 19 | Schwab US Small-Cap ETF™ | 0.49% | 361K | $8.2M | +243 (+0.1%) | September 30, 2026 |
| 20 | State Street® SPDR® S&P 600™ Sm CpValETF | 0.48% | 359K | $8.2M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
XNCR insider transactions
latest 16| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-06 | Bassil I Dahiyat | Sell | $11.02 | 6,606 | $72,798 |
| 2026-03-06 | Celia Eckert | Sell | $11.02 | 1,767 | $19,472 |
| 2026-03-06 | John R Desjarlais | Sell | $11.02 | 2,502 | $27,572 |
| 2026-03-05 | Bassil I Dahiyat | Sell | $11.25 | 14,870 | $167,288 |
| 2026-03-05 | Celia Eckert | Sell | $11.25 | 3,244 | $36,495 |
| 2026-03-05 | John R Desjarlais | Sell | $11.25 | 4,118 | $46,328 |
| 2026-03-03 | Bassil I Dahiyat | Sell | $11.90 | 6,758 | $80,420 |
| 2026-03-03 | Celia Eckert | Sell | $11.90 | 1,492 | $17,755 |
| 2026-03-03 | John R Desjarlais | Sell | $11.90 | 2,663 | $31,690 |
| 2025-12-19 | Bassil I Dahiyat | Sell | $15.71 | 114,377 | $1.8M |
| 2025-12-19 | John R Desjarlais | Sell | $15.72 | 73,367 | $1.2M |
| 2025-06-16 | Alan Bruce Montgomery | Sell | $9.22 | 2,215 | $20,422 |
| 2025-06-16 | Ellen Feigal | Sell | $9.22 | 2,993 | $27,595 |
| 2025-06-16 | Kurt A Gustafson | Sell | $9.22 | 2,993 | $27,595 |
| 2025-06-16 | Richard J Ranieri | Sell | $9.22 | 2,993 | $27,595 |
| 2025-05-02 | Nancy Valente | Sell | $11.03 | 4,616 | $50,914 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
XNCR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns XNCR
Institutional investors own 114.6% of Xencor's shares and insiders 1.22%. The largest holder is BlackRock Inc with 18.36% of the shares (13.7M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 3 reduced their stake in the latest filings. Short interest is 31.23% of the float, or 11.27 days of average trading volume. The share count rose 136.2% since 2014.
Related: XNCR analyst forecast, XNCR key metrics. See the XNCR stock overview for the latest quote and news.
XNCR ownership FAQ
Who owns the most Xencor stock?
The largest shareholders of Xencor are BlackRock Inc (18.36%), PRIMECAP Management Company (13.69%), Bvf Inc (9.59%), RTW INVESTMENTS, LLC (9.12%), RA Capital Management, LLC (7.09%).
What percentage of Xencor is owned by institutions?
Institutions hold 114.6% of Xencor's shares outstanding; insiders hold 1.22%.
Which funds own Xencor?
The largest fund holders of Xencor are PRIMECAP Odyssey Aggressive Growth (8.56%), iShares Core S&P Small-Cap ETF (5.47%), PRIMECAP Odyssey Growth (4.21%), Vanguard MStar Total Stk Mkt Idx Invest (3.15%), iShares Russell 2000 ETF (2.43%).
What is Xencor's short interest?
16.4M shares of Xencor were sold short, 31.23% of the float; at the average daily volume it would take 11.27 days to cover.
Are insiders buying or selling Xencor?
Of the latest 16 reported insider transactions in Xencor (since May 2, 2025), 0 were purchases and 16 were sales.
How many shares of Xencor are outstanding?
Xencor has 74.4M shares outstanding, of which 54.3M are in the public float.