Arcellx Ownership | Who Owns Arcellx?

Overview Forecast RevenueFinancials Chart

Arcellx Ownership Summary

Arcellx is owned by 9.59% institutional investors, 12.91% insiders, and 77.49% retail investors. Gilead sciences is the largest institutional shareholder, holding 11.88% of ACLX shares. T. Rowe Price Capital Appreciation is the top mutual fund, with 4.72% of its assets in Arcellx shares.

ACLX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Arcellx	9.59%	12.91%	77.49%
Sector	Healthcare Stocks	232.01%	10.74%	-142.75%
Industry	Biotech Stocks	381.47%	10.55%	-292.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Gilead sciences	6.72M	11.88%	$438.20M
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	4.08M	7.21%	$266.12M
Blackrock	3.52M	6.67%	$194.07M
Blackrock funding, inc. /de	3.55M	6.27%	$231.38M
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	223.49K	63.94%	$14.57M
Gilead sciences	6.72M	22.64%	$438.20M
Sr one capital management, lp	2.35M	21.66%	$153.00M
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
Affinity asset advisors	500.00K	3.58%	$41.05M
Ra capital management	3.04M	3.07%	$249.30M

Top Buyers

Holder	Shares	% Assets	Change
T. rowe price investment management	6.35M	0.32%	4.41M
Jpmorgan chase	1.45M	0.01%	571.97K
Blackrock	3.52M	0.00%	450.30K
Fisher asset management	322.86K	0.01%	322.86K
Goldman sachs group	668.48K	0.01%	220.04K

Top Sellers

Holder	Shares	% Assets	Change
Vestal point capital, lp	1.25M	4.63%	-1.50M
Aju ib investment	223.49K	63.94%	-824.07K
Capital world investors	-	-	-783.01K
Nea management company	3.05M	13.72%	-700.00K
Suvretta capital management	-	-	-689.95K

New Positions

Holder	Shares	% Assets	Change	Value
Fisher asset management	322.86K	0.01%	322.86K	$21.05M
Logos global management lp	165.00K	1.21%	165.00K	$13.55M
Integral health asset management	150.00K	0.83%	150.00K	$12.31M
Abrdn	60.36K	0.01%	60.36K	$3.94M
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
Principal securities	-3.00
Rise advisors	-7.00
Stephens consulting	-15.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	54	-75.34%	5,428,377	-91.39%	9	0.08%	27	-68.97%	17	-79.52%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
T. Rowe Price Capital Appreciation	2.76M	4.72%	-
Vanguard Total Stock Mkt Idx Inv	1.86M	3.19%	5.53K
T. Rowe Price Mid-Cap Growth	1.21M	2.07%	364.70K
T. Rowe Price US Mid-Cap Growth Equity	1.21M	2.07%	428.90K
State Street® SPDR® S&P® Biotech ETF	1.20M	2.05%	-6.41K
T. Rowe Price US Small-Cap Core Equity	917.84K	1.57%	200.31K
T. Rowe Price Small-Cap Stock	917.84K	1.57%	2.02K
American Funds SMALLCAP World A	783.01K	1.42%	73.64K
Fidelity Growth Compy Commingled Pl O	764.28K	1.42%	-
iShares Russell 2000 ETF	819.99K	1.40%	611.34K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 27, 2026	Elghandour Rami	SEE REMARKS	Sell	$10.24M
Feb 25, 2026	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$1.28M
Feb 19, 2026	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$194.99K
Feb 19, 2026	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$370.63K
Feb 19, 2026	Gilson Michelle	CHIEF FINANCIAL OFFICER	Sell	$6.94K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	11
2025 Q4	-	4
2025 Q3	-	7
2025 Q2	-	6
2025 Q1	-	34

ACLX Ownership FAQ

Who Owns Arcellx?

Arcellx shareholders are primarily institutional investors at 9.59%, followed by 12.91% insiders and 77.50% retail investors. The average institutional ownership in Arcellx's industry, Biotech Stocks , is 381.47%, which Arcellx falls below.

Who owns the most shares of Arcellx?

Arcellx’s largest shareholders are Gilead sciences (6.72M shares, 11.88%), T. rowe price investment management (6.35M shares, 11.30%), and Fmr (5.76M shares, 10.25%). Together, they hold 33.42% 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 63.94% of its assets in 223.49K Arcellx shares, valued at 14.57M$.

Who is the top mutual fund holder of Arcellx shares?

T. Rowe Price Capital Appreciation is the top mutual fund holder of Arcellx shares, with 4.72% of its total shares outstanding invested in 2.76M Arcellx shares.

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