Xencor Ownership | Who Owns Xencor?

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Xencor Ownership Summary

Xencor is owned by 86.39% institutional investors, 1.25% insiders, and 12.36% retail investors. Blackrock is the largest institutional shareholder, holding 18.14% of XNCR shares. PRIMECAP Odyssey Aggressive Growth is the top mutual fund, with 8.61% of its assets in Xencor shares.

XNCR Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Xencor	86.39%	1.25%	12.36%
Sector	Healthcare Stocks	232.86%	10.65%	-143.51%
Industry	Biotech Stocks	382.13%	10.41%	-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	11.10M	18.14%	$210.18M
Blackrock funding, inc. /de	13.04M	17.56%	$157.21M
Primecap management co/ca/	10.34M	13.93%	$124.68M
Vanguard group	7.17M	9.63%	$109.70M
Rtw investments, lp	6.22M	8.38%	$72.97M
Ecor1 capital	6.14M	8.27%	$72.08M
State street	3.67M	4.95%	$43.09M
Bvf inc/il	2.74M	3.69%	$32.14M
Tcg crossover management	2.45M	3.30%	$28.76M
Geode capital management	1.75M	2.36%	$26.84M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Ecor1 capital	6.14M	3.46%	$72.08M
Tcg crossover management	2.45M	1.41%	$28.76M
Johnson & johnson	748.06K	1.38%	$9.02M
Bvf inc/il	2.74M	1.30%	$32.14M
Lynx1 capital management lp	536.40K	1.02%	$6.47M
Rtw investments, lp	6.22M	0.90%	$72.97M
Braidwell lp	1.25M	0.43%	$14.62M
Dcf advisers	103.74K	0.33%	$1.25M
Corton capital	10.05K	0.29%	$117.91K
Essex	98.66K	0.21%	$1.19M

Top Buyers

Holder	Shares	% Assets	Change
Rtw investments, lp	6.22M	0.90%	3.82M
Blackrock funding, inc. /de	13.04M	0.00%	1.11M
Nuveen asset management	837.08K	0.01%	685.56K
Morgan stanley	1.51M	0.00%	607.89K
Vanguard fiduciary trust	471.08K	0.00%	471.08K

Top Sellers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	1.69M	0.00%	-2.07M
Millennium management	-	-	-1.41M
Logos global management lp	-	-	-1.25M
Darwin global management	-	-	-1.11M
Loomis sayles & co l p	-	-	-1.07M

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	471.08K	0.00%	471.08K	$5.68M
Susquehanna portfolio strategies	106.86K	0.02%	106.86K	$1.25M
Weiss asset management lp	66.27K	0.01%	66.27K	$777.38K
Toronto dominion bank	50.00K	0.00%	50.00K	$586.50K
Brevan howard capital management lp	49.23K	0.00%	49.23K	$577.53K

Sold Out

Holder	Change
Sbi securities	-1.00
Dunhill financial	-1.00
Larson financial group	-1.00
Dinuzzo private wealth	-1.00
Capital performance advisors llp	-3.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	154	-25.24%	64,286,538	-21.64%	86	0.71%	66	-27.47%	60	-25.93%
Sep 30, 2025	198	3.66%	81,948,489	-0.41%	110	0.90%	86	-27.73%	81	131.43%
Jun 30, 2025	188	-5.05%	82,120,873	13.33%	110	1.14%	116	12.62%	36	-42.86%
Mar 31, 2025	198	2.06%	78,572,373	4.86%	106	0.78%	102	-6.42%	63	23.53%
Dec 31, 2024	180	-14.69%	68,955,988	-4.08%	107	0.85%	98	2.08%	50	-39.02%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
PRIMECAP Odyssey Aggressive Growth	6.38M	8.61%	36.00K
iShares Core S&P Small-Cap ETF	4.36M	5.89%	1.13K
PRIMECAP Odyssey Growth	3.22M	4.34%	73.70K
Vanguard US Total Market Shares ETF	2.17M	3.08%	217.00K
Vanguard Total Stock Mkt Idx Inv	2.23M	3.04%	-
iShares Russell 2000 ETF	1.65M	2.23%	13.96K
State Street® SPDR® S&P® Biotech ETF	1.59M	2.14%	-15.65K
US Small-Cap Growth II Equity Comp	1.44M	2.02%	-154.25K
T. Rowe Price New Horizons	1.15M	1.61%	-293.56K
SPDR® S&P Biotech ETF	1.10M	1.55%	2.46K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 10, 2026	Cornelissen Bart Jan	SR. VICE PRESIDENT & CFO	Sell	$42.99K
Mar 06, 2026	Desjarlais John R	SR. VICE PRESIDENT & CSO	Sell	$27.57K
Mar 05, 2026	Desjarlais John R	SR. VICE PRESIDENT & CSO	Sell	$46.31K
Mar 05, 2026	Eckert Celia	SVP, GENERAL COUNSEL	Sell	$36.48K
Mar 06, 2026	Eckert Celia	SVP, GENERAL COUNSEL	Sell	$19.47K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	3
2025 Q4	-	2
2025 Q3	-	-
2025 Q2	-	7
2025 Q1	-	4

XNCR Ownership FAQ

Who Owns Xencor?

Xencor shareholders are primarily institutional investors at 86.39%, followed by 1.25% insiders and 12.36% retail investors. The average institutional ownership in Xencor's industry, Biotech Stocks , is 382.13%, which Xencor falls below.

Who owns the most shares of Xencor?

Xencor’s largest shareholders are Blackrock (11.1M shares, 18.14%), Blackrock funding, inc. /de (13.04M shares, 17.56%), and Primecap management co/ca/ (10.34M shares, 13.93%). Together, they hold 49.62% of Xencor’s total shares outstanding.

Does Blackrock own Xencor?

Yes, BlackRock owns 18.14% of Xencor, totaling 11.1M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 210.18M$. In the last quarter, BlackRock increased its holdings by 48.55K shares, a 0.44% change.

Who is Xencor’s biggest shareholder by percentage of total assets invested?

Ecor1 capital is Xencor’s biggest shareholder by percentage of total assets invested, with 3.46% of its assets in 6.14M Xencor shares, valued at 72.08M$.

Who is the top mutual fund holder of Xencor shares?

PRIMECAP Odyssey Aggressive Growth is the top mutual fund holder of Xencor shares, with 8.61% of its total shares outstanding invested in 6.38M Xencor shares.

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