AKTS · Aktis Oncology, Inc.

$27.05 +0.40 (+1.50%) At close · Sep 4

Russell 2000 member Rebalance outlook locked

Market Cap

$1.50B

55.62M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 114

Total Value: $1,101,305,572

Total Shares: 34,170,226

Showing 1–100 of 114 holdings by value · page 1 of 2

Institutional Ownership Trend

2 quarters

Superinvestors Holding AKTS

All superinvestors →

George Soros $3,223,000

Holder Concentration

Across 114 13F filers · Δ vs Mar 31, 2026

Top Holder

14.2%

+0.2 pts

Top 5

49.9%

+0.2 pts

Top 10

70.9%

−2.5 pts

HHI

698

Broadly held−12

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +45

Institutional value: +77.3%

Shares held: -1.6%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega BlackRock, Inc.	+166,231	2,278,358
Mega BARCLAYS PLC	+141,972	151,696
Mega STATE STREET CORP	+55,757	484,010
Mega MORGAN STANLEY	+31,913	62,636
Mega NORTHERN TRUST CORP	+31,099	180,575

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega PRICE T ROWE ASSOCIATES INC /MD/	−800,697	763,499
Mega WELLINGTON MANAGEMENT GROUP LLP	−350,800	1,966,244
Mega UBS Group AG	−253,303	99,960
Large RA CAPITAL MANAGEMENT, L.P.	−188,679	1,314,405
Mega FMR LLC	−100,748	285,631

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega Jupiter Topco LLC	1,314,267	$42,358,825
Mid TCG Crossover Management, LLC	696,560	$22,450,128
Large RENAISSANCE TECHNOLOGIES LLC	95,400	$3,074,742
Large POLEN CAPITAL MANAGEMENT LLC	63,514	$2,047,056
Large Tidal Investments LLC	57,059	$1,839,011

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega JANUS HENDERSON GROUP PLC	1,454,267	$26,016,836
Large Driehaus Capital Management LLC	150,000	$2,683,500
Mid Laurion Capital Management LP	100,000	$1,789,000
Mega D. E. Shaw & Co., Inc.	17,062	$305,239
Mid Zimmer Partners, LP	15,000	$268,350

Filter: New 53 Increased 28 Reduced 17 Sold out 8 Unchanged 16

Showing 100 of 114

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

MPM BIOIMPACT LLC

$155,860,154

14.15%

4,835,872

EcoR1 Capital, LLC

$155,492,635

14.12%

4,824,469

Blue Owl Capital Holdings LP

$98,953,158

8.99%

3,070,219

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Blue Owl Healthcare Opportunities Advisors LLC	3,070,219	$98,953,158	100.0%	Defined

BlackRock, Inc.

$73,431,474

6.67%

2,278,358

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	78,113	$2,517,581	3.4%	Sole
BlackRock Investment Management, LLC	75,270	$2,425,952	3.3%	Sole
BLACKROCK ADVISORS LLC	396,825	$12,789,669	17.4%	Sole
BlackRock Fund Advisors	760,696	$24,517,232	33.4%	Sole
BlackRock Institutional Trust Company, N.A.	568,683	$18,328,653	25.0%	Sole
BlackRock Investment Management (UK) Ltd.	23,447	$755,696	1.0%	Sole
BlackRock (Luxembourg) S.A.	372,533	$12,006,738	16.4%	Sole
Aperio Group, LLC	2,791	$89,953	0.1%	Sole

T. Rowe Price Investment Management, Inc.

$66,118,136

6.00%

2,051,447

WELLINGTON MANAGEMENT GROUP LLP

$63,372,044

5.75%

1,966,244

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wellington Management Company LLP	1,953,344	$62,956,277	99.3%	Defined
Wellington Management Singapore Pte. Ltd.	12,900	$415,767	0.7%	Defined

RTW INVESTMENTS, LP

$51,311,545

4.66%

1,592,043

RA CAPITAL MANAGEMENT, L.P.

$42,363,273

3.85%

1,314,405

Jupiter Topco LLC

$42,358,825

3.85%

1,314,267

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JANUS HENDERSON INVESTORS US LLC	1,314,267	$42,358,825	100.0%	Defined

BAKER BROS. ADVISORS LP

$32,112,392

2.92%

996,351

Octagon Capital Advisors LP

$30,968,098

2.81%

960,847

Merck & Co., Inc.

$30,710,162

2.79%

952,844

VANGUARD CAPITAL MANAGEMENT LLC

$26,334,327

2.39%

817,075

PRICE T ROWE ASSOCIATES INC /MD/

$24,607,572

2.23%

763,499

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	36,264	$1,168,788	4.7%	Defined
Held directly	727,235	$23,438,784	95.3%	Sole

TCG Crossover Management, LLC

$22,450,128

2.04%

696,560

GEODE CAPITAL MANAGEMENT, LLC

$16,783,353

1.52%

520,737

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	73,092	$2,355,755	14.0%	Defined
Held directly	447,645	$14,427,598	86.0%	Defined

EVENTIDE ASSET MANAGEMENT, LLC

$16,340,610

1.48%

507,000

Avidity Partners Management LP

$15,605,766

1.42%

484,200

STATE STREET CORP

$15,599,642

1.42%

484,010

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	484,010	$15,599,642	100.0%	Defined

a16z Capital Management, L.L.C.

$13,375,450

1.21%

415,000

Alyeska Investment Group, L.P.

$9,346,700

0.85%

290,000

FMR LLC

$9,205,887

0.84%

285,631

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	285,631	$9,205,887	100.0%	Defined

ArrowMark Colorado Holdings LLC

$7,924,454

0.72%

245,872

NORTHERN TRUST CORP

$5,819,931

0.53%

180,575

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	177,242	$5,712,509	98.2%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	3,333	$107,422	1.8%	Other

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$5,377,317

0.49%

166,842

BARCLAYS PLC

$4,889,161

0.44%

151,696

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	150,223	$4,841,687	99.0%	Defined
BARCLAYS CAPITAL INC.	1,473	$47,474	1.0%	Defined

VANGUARD PORTFOLIO MANAGEMENT LLC

$4,680,440

0.42%

145,220

VANGUARD FIDUCIARY TRUST CO

$4,313,469

0.39%

133,834

TD Asset Management Inc

$3,413,221

0.31%

105,902

Woodline Partners LP

$3,223,000

0.29%

100,000

SOROS FUND MANAGEMENT LLC

$3,223,000

0.29%

100,000

UBS Group AG

$3,221,710

0.29%

99,960

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	98,760	$3,183,034	98.8%	Defined
UBS Switzerland AG	1,200	$38,676	1.2%	Defined

RENAISSANCE TECHNOLOGIES LLC

$3,074,742

0.28%

95,400

BANK OF AMERICA CORP /DE/

$2,347,470

0.21%

72,835

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	19,443	$626,647	26.7%	Defined
MERRILL LYNCH, PIERCE, FENNER & SMITH INC.	39,308	$1,266,896	54.0%	Defined
MANAGED ACCOUNT ADVISORS LLC	14,084	$453,927	19.3%	Defined

POLEN CAPITAL MANAGEMENT LLC

$2,047,056

0.19%

63,514

MORGAN STANLEY

$2,018,755

0.18%

62,636

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	28	$902	0.0%	Defined
MORGAN STANLEY & CO. LLC	5,799	$186,901	9.3%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	8,886	$286,395	14.2%	Defined
MORGAN STANLEY SMITH BARNEY LLC	7,341	$236,600	11.7%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	40,582	$1,307,957	64.8%	Defined

Tidal Investments LLC

$1,839,011

0.17%

57,059

RAYMOND JAMES FINANCIAL INC

$1,626,453

0.15%

50,464

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	47,625	$1,534,953	94.4%	Defined
Raymond James Financial Services Advisors, Inc.	2,839	$91,500	5.6%	Defined

Nuveen, LLC

$1,605,569

0.15%

49,816

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	7,693	$247,945	15.4%	Defined
TEACHERS ADVISORS, LLC joint	42,123	$1,357,624	84.6%	Defined

Bank of New York Mellon Corp

$1,587,326

0.14%

49,250

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	13,609	$438,618	27.6%	Defined
The Bank of New York Mellon	34,730	$1,119,347	70.5%	Defined
BNY Mellon Advisors, Inc.	910	$29,329	1.8%	Defined
Held directly	1	$32	0.0%	Defined

AQR CAPITAL MANAGEMENT LLC

$1,551,000

0.14%

48,123

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	3	$96	0.0%	Other
Prism Planning Partners LLC	33	$1,063	0.1%	Other
Arax Advisory Partners	313	$10,087	0.7%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	207	$6,671	0.4%	Other
Stokes Family Office, LLC	63	$2,030	0.1%	Other
Held directly	47,504	$1,531,053	98.7%	Defined

MANUFACTURERS LIFE INSURANCE COMPANY, THE

$1,548,458

0.14%

48,044

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	48,044	$1,548,458	100.0%	Defined

Quantinno Capital Management LP

$1,511,168

0.14%

46,887

GREAT LAKES ADVISORS, LLC

$1,405,614

0.13%

43,612

Mirador Capital Partners LP

$1,293,196

0.12%

40,124

Squarepoint Ops LLC

$1,237,019

0.11%

38,381

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	38,381	$1,237,019	100.0%	Defined

Jump Financial, LLC

$1,056,467

0.10%

32,779

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Leap GP LLC joint	32,779	$1,056,467	100.0%	Defined

Sofinnova Investments, Inc.

$1,045,412

0.09%

32,436

TWO SIGMA INVESTMENTS, LP

$996,358

0.09%

30,914

READYSTATE ASSET MANAGEMENT LP

$966,900

0.09%

30,000

WELLS FARGO & COMPANY/MN

$891,448

0.08%

27,659

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	18,856	$607,728	68.2%	Defined
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	8,733	$281,464	31.6%	Defined
WELLS FARGO CLEARING SERVICES, LLC	70	$2,256	0.3%	Defined

RHUMBLINE ADVISERS

$868,437

0.08%

26,945

CITADEL ADVISORS LLC

$823,057

0.07%

25,537

Ghisallo Capital Management LLC

$805,750

0.07%

25,000

SEVEN GRAND MANAGERS, LLC

$805,750

0.07%

25,000

TUDOR INVESTMENT CORP ET AL

$689,786

0.06%

21,402

GOLDMAN SACHS GROUP INC

$685,789

0.06%

21,278

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	21,278	$685,789	100.0%	Defined

DEUTSCHE BANK AG\

$677,538

0.06%

21,022

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	308	$9,926	1.5%	Defined
DWS Investments UK Ltd	20,714	$667,612	98.5%	Defined

AMERIPRISE FINANCIAL INC

$644,600

0.06%

20,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	20,000	$644,600	100.0%	Defined

Mariner, LLC

$572,727

0.05%

17,770

SEI INVESTMENTS CO

$528,636

0.05%

16,402

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI INVESTMENTS MANAGEMENT CORP	8,709	$280,691	53.1%	Sole
SEI TRUST CO	7,693	$247,945	46.9%	Sole

Virtus Investment Advisers, LLC

$480,871

0.04%

14,920

Invesco Ltd.

$480,483

0.04%

14,908

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	2,912	$93,853	19.5%	Defined
Invesco Trust Co joint	8,717	$280,948	58.5%	Defined
Invesco Capital Management LLC	3,279	$105,682	22.0%	Defined

LOS ANGELES CAPITAL MANAGEMENT LLC

$463,435

0.04%

14,379

CITIGROUP INC

$424,694

0.04%

13,177

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	13,177	$424,694	100.0%	Defined

MetLife Investment Management, LLC

$418,796

0.04%

12,994

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	12,994	$418,796	100.0%	Defined

Caprock Group, LLC

$319,334

0.03%

9,908

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$314,854

0.03%

9,769

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	9,769	$314,854	100.0%	Defined

JPMORGAN CHASE & CO

$284,751

0.03%

8,835

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	8,794	$283,430	99.5%	Defined
J.P. Morgan Investment Management Inc.	1	$32	0.0%	Defined
J.P. Morgan Securities LLC	40	$1,289	0.5%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$277,919

0.03%

8,623

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	8,623	$277,919	100.0%	Other

Russell Investments Group, Ltd.

$249,911

0.02%

7,754

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	7,754	$249,911	100.0%	Defined

NEW YORK STATE COMMON RETIREMENT FUND

$241,725

0.02%

7,500

AXQ CAPITAL, LP

$226,254

0.02%

7,020

Vanguard Global Advisers, LLC

$221,935

0.02%

6,886

PNC FINANCIAL SERVICES GROUP, INC.

$197,891

0.02%

6,140

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	6,140	$197,891	100.0%	Defined

Police & Firemen's Retirement System of New Jersey

$178,231

0.02%

5,530

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	5,530	$178,231	100.0%	Defined

NBC SECURITIES, INC.

$172,688

0.02%

5,358

SG Americas Securities, LLC

$108,550

0.01%

3,368

BNP PARIBAS ARBITRAGE, SA

$105,714

0.01%

3,280

STRS OHIO

$99,913

0.01%

3,100

Tower Research Capital LLC (TRC)

$73,097

0.01%

2,268

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	2,268	$73,097	100.0%	Defined

Pinnacle Wealth Planning Services, Inc.

$73,065

0.01%

2,267

Legal & General Group Plc

$66,458

0.01%

2,062

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	2,062	$66,458	100.0%	Defined

Ameritas Investment Partners, Inc.

$62,042

0.01%

1,925

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	1,925	$62,042	100.0%	Other

SALEM INVESTMENT COUNSELORS INC

$32,230

0.00%

1,000

State of Wyoming

$31,746

0.00%

985

ROYAL BANK OF CANADA

$25,687

0.00%

797

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	635	$20,466	79.7%	Defined
RBC Capital Markets, LLC	135	$4,351	16.9%	Defined
RBC Trust Co (Delaware) Ltd	27	$870	3.4%	Defined

NATIONAL BANK OF CANADA /FI/

$22,561

0.00%

700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
National Bank Financial Inc.	700	$22,561	100.0%	Defined

FIFTH THIRD BANCORP

$18,564

0.00%

576

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fifth Third Bank, National Association	576	$18,564	100.0%	Defined

Rockefeller Capital Management L.P.

$12,795

0.00%

397

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER FINANCIAL LLC	397	$12,795	100.0%	Defined

Global Retirement Partners, LLC

$12,730

0.00%

395

Arax Advisory Partners

$12,408

0.00%

385

Integrated Wealth Concepts LLC

$9,991

0.00%

310

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$9,282

0.00%

288

Federation des caisses Desjardins du Quebec

$8,057

0.00%

250

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Desjardins Securities inc.	250	$8,057	100.0%	Defined

Sterling Capital Management LLC

$5,930

0.00%

184

Allworth Financial LP

$3,996

0.00%

124

IFP Advisors, Inc

$3,255

0.00%

101

EverSource Wealth Advisors, LLC

$2,576

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BMSS Wesson Wealth Solutions, LLC	6	$192	7.5%	Sole
Held directly	74	$2,384	92.5%	Sole

Farther Finance Advisors, LLC

$2,481

0.00%

Key facts CIK 2035832 CUSIP 01021M104 13F (30d) 77 filings 77 filers Visit website Investor relations