# XENCOR INC COM

XENCOR INC COM is a security (CUSIP 98401F105) tracked across SEC portfolio filings. 212 institutional managers reported $1.0B on Form 13F as of 2026-06-30; 22 registered fund positions totaling $69.9M via N-PORT as of 2026-05-31.

## Summary

- Issuer: XENCOR INC
- Class: COM
- CUSIP: 98401F105
- Asset category: EC
- 13F holders: 212
- 13F value: $1.0B
- 13F period: 2026-06-30
- N-PORT fund positions: 22
- N-PORT value: $69.9M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 212 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $157.2M | 13,035,918 |
| [PRIMECAP MANAGEMENT CO/CA/](https://search.stillhousedata.com/firm/105516) | PASADENA, CA | $124.7M | 10,338,022 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $109.7M | 7,165,450 |
| BVF INC/IL | San Francisco, CA | $86.0M | 7,133,720 |
| [RTW INVESTMENTS, LP](https://search.stillhousedata.com/firm/153232) | NEW YORK, NY | $81.7M | 6,777,461 |
| RA CAPITAL MANAGEMENT, L.P. | Boston, MA | $59.1M | 4,897,237 |
| STATE STREET CORP | BOSTON, MA | $52.5M | 4,352,036 |
| TCG Crossover Management, LLC | PALO ALTO, CA | $29.6M | 2,452,138 |
| [EcoR1 Capital, LLC](https://search.stillhousedata.com/firm/167121) | San Francisco, CA | $26.3M | 2,183,000 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $21.9M | 1,815,577 |
| MORGAN STANLEY | NEW YORK, NY | $18.8M | 1,558,290 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $15.6M | 1,294,887 |
| [BAKER BROS. ADVISORS LP](https://search.stillhousedata.com/firm/158149) | NEW YORK, NY | $13.3M | 1,102,106 |
| UBS Group AG | Zurich, V8 | $13.1M | 1,082,419 |
| Legal & General Group Plc | London, X0 | $12.9M | 1,066,780 |

## Top fund holders (N-PORT)

_Showing 15 of 22 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [PRIMECAP Odyssey Growth Fund](https://search.stillhousedata.com/fund/S000005540) | PRIMECAP Odyssey Funds | $37.9M | 69.74% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $9.6M | 1.17% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $4.8M | 2.20% |
| [T. Rowe Price Health Sciences Fund, Inc.](https://search.stillhousedata.com/fund/S000002088) | T. ROWE PRICE HEALTH SCIENCES FUND, INC. | $4.6M | 4.19% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $4.3M | 2.45% |
| [VANGUARD STRATEGIC EQUITY FUND](https://search.stillhousedata.com/fund/S000002593) | VANGUARD HORIZON FUNDS | $3.2M | 3.16% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $1.4M | 2.84% |
| [BlackRock Advantage SMID Cap Fund, Inc.](https://search.stillhousedata.com/fund/S000002323) | BlackRock Advantage SMID Cap Fund, Inc. | $743K | 9.83% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $528K | 0.71% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $491K | 0.08% |
| [Bridge Builder Tax Managed Small/Mid Cap Fund](https://search.stillhousedata.com/fund/S000076295) | Bridge Builder Trust | $488K | 1.61% |
| [Fidelity Nasdaq Composite Index ETF](https://search.stillhousedata.com/fund/S000006011) | Fidelity Commonwealth Trust | $429K | 0.39% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $429K | 0.14% |
| [BNY Mellon Smallcap Stock Index Fund](https://search.stillhousedata.com/fund/S000000132) | BNY MELLON INDEX FUNDS, INC. | $426K | 5.03% |
| [T. Rowe Price Health Sciences Portfolio](https://search.stillhousedata.com/fund/S000002083) | T. ROWE PRICE EQUITY SERIES, INC. | $276K | 4.16% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/98401F105.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.