Xencor Inc - Common Stock (XNCR)

CUSIP: 98401F105

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class
Equity / Common Stock
Total 13F shares
84,505,999
Total 13F value
$1,018,821,122
Holder snapshot 6 signals
Share change
+2,783,815
SEC-reported price per share
$12.06
Number of holders
203
Value change
+$23,415,424
Number of buys
91
Number of sells
91
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
74,595,979

Security key

98401F105

Report period

Q1 2026

Institutions

203

Top holders

10

XNCR full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Previous quarter: Q3 2025 Xencor Inc SEC filings Xencor Inc company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of XNCR - Xencor Inc - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
PRIMECAP MANAGEMENT CO/CA/
Disclosed value leader
BlackRock, Inc.
Comparable rows
7/15
Latest evidence
23 Mar 2026
13F 13D/G Lead comparable stake: 15% 8 rows are not safely comparable across share classes. 13D/G row: PRIMECAP MANAGEMENT CO/CA/ Showing 1-6 of 15 holder rows.

Quick read

PRIMECAP MANAGEMENT CO/CA/ leads the comparable SEC ownership view at 15%.

7 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens PRIMECAP MANAGEMENT CO/CA/'s linked filing trail.
Comparable ownership Top 5
PRIMECAP MANAGEMENT CO/CA/ 15%
BIOTECHNOLOGY VALUE FUND L P 10%
RTW INVESTMENTS, LP 8.7%
RA CAPITAL MANAGEMENT, L.P. 6.5%
STATE STREET CORP 6.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
PRIMECAP MANAGEMENT CO/CA/
13F 13D/G
Company
13F 13D/G
15%
Reported 13D/G · 30 Jun 2025
$156,442,509
10,218,322 shares
 — 31 Dec 2025
BIOTECHNOLOGY VALUE FUND L P
13D/G
BVF PARTNERS L P/IL
13D/G
10%
Reported 13D/G · 31 Dec 2025
$109,217,253
7,133,720 shares
 +$38,495,142 31 Dec 2025
RTW INVESTMENTS, LP
13F 13D/G
Company
13F 13D/G
8.7%
Reported 13D/G · 30 Sep 2025
$103,762,928
6,777,461 shares
 — 31 Dec 2025
RA CAPITAL MANAGEMENT, L.P.
13D/G
13D/G
6.5%
Reported 13D/G · 23 Mar 2026
$58,261,890
4,736,739 shares
 $0 23 Mar 2026
STATE STREET CORP
13F 13D/G
Company · STATE STREET CORPORATION
13F 13D/G
6.3%
Reported 13D/G · 31 Dec 2025
$69,006,059
4,507,254 shares
 — 31 Dec 2025
EcoR1 Capital, LLC
13F 13D/G
Company
13F 13D/G
2.9%
Reported 13D/G · 31 Mar 2026
$49,774,525
3,251,112 shares
 — 31 Dec 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
203
Shares
84,505,999
Rows available
203
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q3 2025 Across Filers

Q3 2025 holders
204
Q1 2026 holders
203
Holder diff
-1
Investor Q3 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q3 2025 value Q1 2026 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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