Arcellx Ownership | Who Owns Arcellx?

Overview Forecast RevenueFinancials Chart

Arcellx Ownership Summary

Arcellx is owned by 13.28% institutional investors, 12.81% insiders, and 73.90% retail investors. Gilead sciences is the largest institutional shareholder, holding 11.95% of ACLX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.13% of its assets in Arcellx shares.

ACLX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Arcellx	13.28%	12.81%	73.90%
Sector	Healthcare Stocks	41.88%	10.83%	47.29%
Industry	Biotech Stocks	44.05%	10.78%	45.17%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Gilead sciences	6.72M	11.95%	$551.78M
T. rowe price investment management	6.35M	11.30%	$521.53M
Fmr	5.76M	10.25%	$473.00M
Paradigm biocapital advisors lp	4.65M	8.27%	$381.68M
Vanguard group	3.91M	6.95%	$320.77M
Blackrock	3.52M	6.67%	$194.07M
Blackrock funding, inc. /de	3.39M	6.03%	$278.15M
Nea management company	3.05M	5.42%	$250.02M
Ra capital management	3.04M	5.40%	$249.30M
Perceptive advisors	2.47M	4.39%	$202.65M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Aju ib investment	1.05M	74.71%	$86.00M
Gilead sciences	6.72M	30.80%	$551.78M
Sr one capital management, lp	2.35M	27.86%	$192.66M
Pathway capital management, lp	51.05K	20.60%	$4.19M
Nea management company	3.05M	13.72%	$250.02M
Paradigm biocapital advisors lp	4.65M	10.86%	$381.68M
Perceptive advisors	2.47M	5.85%	$202.65M
Vestal point capital, lp	1.25M	4.63%	$102.63M
Cormorant asset management, lp	775.00K	4.39%	$63.63M
First turn management	313.73K	3.87%	$25.76M

Top Buyers

Holder	Shares	% Assets	Change
T. rowe price investment management	6.35M	0.32%	4.41M
Blackrock	3.52M	0.00%	450.30K
Pictet asset management sa	383.14K	0.03%	377.65K
Logos global management lp	165.00K	1.21%	165.00K
Schonfeld strategic advisors	500.31K	0.23%	153.59K

Top Sellers

Holder	Shares	% Assets	Change
Vestal point capital, lp	1.25M	4.63%	-1.50M
Nea management company	3.05M	13.72%	-700.00K
Suvretta capital management	-	-	-689.95K
Decheng capital	-	-	-547.61K
Janus henderson group	1.56M	0.06%	-454.86K

New Positions

Holder	Shares	% Assets	Change	Value
Logos global management lp	165.00K	1.21%	165.00K	$13.55M
Integral health asset management	150.00K	0.83%	150.00K	$12.31M
Monaco asset management sam	78.59K	0.39%	78.59K	$6.45M
Jane street group	74.48K	0.00%	74.48K	$6.11B
Balyasny asset management	54.79K	0.01%	54.79K	$3.61M

Sold Out

Holder	Change
Twin peaks wealth advisors	-1.00
Quantbot technologies lp	-1.00
Ifp advisors	-2.00
Principal securities	-3.00
Ronald blue trust	-11.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	71	-66.35%	7,468,701	-87.83%	13	0.11%	31	-66.67%	27	-67.47%
Jun 30, 2025	209	-0.48%	61,373,108	-0.32%	109	0.88%	91	-11.65%	83	16.90%
Mar 31, 2025	209	-5.00%	61,558,855	4.06%	111	0.92%	103	-18.25%	71	22.41%
Dec 31, 2024	218	8.46%	58,110,509	17.41%	107	1.28%	123	14.95%	59	-3.28%
Sep 30, 2024	201	19.64%	49,489,251	-1.47%	91	1.04%	108	6.93%	61	22.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	1.74M	3.13%	-36.26K
Fidelity Growth Compy Commingled Pl S	1.03M	1.85%	101.33K
iShares Russell 2000 ETF	882.89K	1.59%	-
Fidelity Growth Compy Commingled Pl O	764.28K	1.42%	-
American Funds SMALLCAP World A	783.01K	1.42%	73.64K
Fidelity Growth Company Fund	773.52K	1.39%	81.07K
SPDR® S&P Biotech ETF	688.11K	1.24%	1.53K
Vanguard Small Cap Index	668.59K	1.21%	-4.27K
T. Rowe Price Small-Cap Stock	587.70K	1.06%	87.33K
Fidelity Select Biotechnology	552.00K	1.00%	-19.90K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 17, 2025	Heery Christopher	CHIEF MEDICAL OFFICER	Sell	$30.60K
Oct 15, 2025	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$488.32K
Oct 06, 2025	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$91.73K
Oct 03, 2025	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$419.87K
Sep 30, 2025	Heery Christopher	CHIEF MEDICAL OFFICER	Sell	$125.76K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	4
2025 Q3	-	7
2025 Q2	-	6
2025 Q1	-	34
2024 Q4	-	23

ACLX Ownership FAQ

Who Owns Arcellx?

Arcellx shareholders are primarily institutional investors at 13.28%, followed by 12.81% insiders and 73.91% retail investors. The average institutional ownership in Arcellx's industry, Biotech Stocks , is 44.05%, which Arcellx falls below.

Who owns the most shares of Arcellx?

Arcellx’s largest shareholders are Gilead sciences (6.72M shares, 11.95%), T. rowe price investment management (6.35M shares, 11.30%), and Fmr (5.76M shares, 10.25%). Together, they hold 33.50% of Arcellx’s total shares outstanding.

Does Blackrock own Arcellx?

Yes, BlackRock owns 6.67% of Arcellx, totaling 3.52M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 194.07M$. In the last quarter, BlackRock increased its holdings by 450.3K shares, a 14.69% change.

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

Aju ib investment is Arcellx’s biggest shareholder by percentage of total assets invested, with 74.71% of its assets in 1.05M Arcellx shares, valued at 86M$.

Who is the top mutual fund holder of Arcellx shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Arcellx shares, with 3.13% of its total shares outstanding invested in 1.74M Arcellx shares.

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