Company · Ownership research

Xencor Inc XNCR

CIK 0001326732 · CUSIP 98401F105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 98401F105 (XNCR), not CUSIP 98401F905 (XNCR), CUSIP 98401F955 (XNCR), and does not merge CUSIPs.

This page lists the top 20 of 203 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$157.21M 13,035,918 shares	0.00%	+1.11M(+9.30%)Added	SEC filing ↗ May 13, 2026	▾
02	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$124.68M 10,338,022 shares	0.10%	+119.70K(+1.20%)Added	SEC filing ↗ May 11, 2026	▾
03	BVF INC/IL CIK 1056807 · View history	$86.03M 7,133,720 shares	2.74%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
04	RTW INVESTMENTS, LP CIK 1493215 · View history	$81.74M 6,777,461 shares	0.81%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
05	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$59.06M 4,897,237 shares	0.63%	+4.90MNew	SEC filing ↗ May 15, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$52.49M 4,352,036 shares	0.00%	-155.22K(-3.40%)Reduced	SEC filing ↗ May 15, 2026	▾
07	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$42.21M 3,500,342 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
08	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$37.41M 3,101,647 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
09	TCG Crossover Management, LLC CIK 1839948 · View history	$29.57M 2,452,138 shares	0.85%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
10	EcoR1 Capital, LLC CIK 1587114 · View history	$26.33M 2,183,000 shares	1.13%	-1.07M(-32.90%)Reduced	SEC filing ↗ May 15, 2026	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$21.90M 1,815,577 shares	0.00%	+62.66K(+3.60%)Added	SEC filing ↗ May 15, 2026	▾
12	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$18.82M 1,560,420 shares	0.00%	-41.34K(-2.60%)Reduced	SEC filing ↗ May 15, 2026	▾
13	MORGAN STANLEY CIK 895421 · View history	$18.79M 1,558,290 shares	0.00%	+49.56K(+3.30%)Added	SEC filing ↗ May 15, 2026	▾
14	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$15.61M 1,294,887 shares	0.00%	+45.60K(+3.60%)Added	SEC filing ↗ May 7, 2026	▾
15	BAKER BROS. ADVISORS LP CIK 1263508 · View history	$13.29M 1,102,106 shares	0.08%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
16	UBS Group AG CIK 1610520 · View history	$13.05M 1,082,419 shares	0.00%	+444.40K(+69.70%)Added	SEC filing ↗ May 5, 2026	▾
17	Legal & General Group Plc CIK 764068 · View history	$12.87M 1,066,780 shares	0.00%	-241.31K(-18.40%)Reduced	SEC filing ↗ May 8, 2026	▾
18	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$9.71M 805,421 shares	0.01%	+536.68K(+199.70%)Added	SEC filing ↗ May 15, 2026	▾
19	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$9.21M 763,793 shares	0.00%	+10.54K(+1.40%)Added	SEC filing ↗ May 15, 2026	▾
20	JOHNSON & JOHNSON CIK 200406 · View history	$9.02M 748,062 shares	1.38%	0(0.00%)Unchanged	SEC filing ↗ May 13, 2026	▾

Showing 20 / 203 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

203

Cancelled or null records excluded

Disclosed shares

84,450,923

Not deduplicated across managers

Disclosed value

$1.02B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Xencor Inc · Q1 2026

Explore all 203 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.