CATX · Perspective Therapeutics, Inc. · Shareholders & Ownership

$1.61 -0.65 (-28.76%) At close · Oct 23

Russell 2000 member Rebalance outlook locked

Market Cap

$183.78M

114.15M

Volume · Oct 23 5.61M Avg daily vol (3M) 1.66M

Every disclosed holder of CATX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns CATX

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	126	87,224,347	76.41%	Yes
Insiders (Forms 3, 4, 5)	8	23,352,714	20.46%	Yes
13D/G-only blocks	7	29,373,488	25.73%	Yes
Remaining	—	25,798,886	-22.60%	Negative
Registered funds (N-PORT, not summed)	118	20,352,408	17.83%	No

Shares outstanding: 114,151,663, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of CATX

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Lantheus Alpha Therapy, LLC Insider CIK 2010224 · Sep 4, 2026 10% Owner, issuer-wide	11,273,364	9.88%	-247,932	Sep 4, 2026	10% Owner, issuer-wide
2	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	9,494,152	8.32%	+4,145,591	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	7,776,940	6.81%	+2,525,577	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	2,647,335	2.32%	+1,143,846	Jun 30, 2026	iShares Trust, not summed
2.3	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	977,879	0.86%	+446,622	Jun 30, 2026	iShares Trust, not summed
2.4	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	636,237	0.56%	-57,223	Jun 30, 2026	iShares Trust, not summed
2.5	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	346,808	0.30%	+190,725	Jun 30, 2026	iShares Trust, not summed
3	Lantheus Holdings, Inc. 13D CIK 1521036 · Unknown · Sep 21, 2026 Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands not summed	8,739,011	7.66%	+7,594,960	Sep 21, 2026	not summed
3.1	Lantheus Holdings, Inc. Insider CIK 1521036 · Sep 1, 2026 10% Owner, issuer-wide	11,563,425	10.13%	-35,769	Sep 1, 2026	10% Owner, issuer-wide
4	TCG Crossover GP II, LLC 13G CIK 1969280 · Unknown · Feb 3, 2026 Rule 13d-1(c), passive investor	7,915,567	6.93%	—	Feb 3, 2026	Rule 13d-1(c), passive investor
5	TCG Crossover Management, LLC 13F CIK 1839948 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	7,915,567	6.93%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Qatar Investment Authority 13G CIK 1441449 · Unknown · Feb 4, 2026 Rule 13d-1(c), passive investor	7,073,308	6.20%	—	Feb 4, 2026	Rule 13d-1(c), passive investor
7	Commodore Capital LP 13F CIK 1831942 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,336,782	5.55%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
8	MILLENNIUM MANAGEMENT LLC 13G CIK 1273087 · Registered investment adviser · Aug 7, 2026 Rule 13d-1(c), passive investor, not summed	6,316,545	5.53%	+279,546	Aug 7, 2026	Rule 13d-1(c), passive investor, not summed
8.1	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,911,855	4.30%	+865,215	Jun 30, 2026	carried, not yet filed for the newest quarter
9	Avidity Partners Management LP 13F CIK 1791827 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,299,999	5.52%	+250,000	Jun 30, 2026	carried, not yet filed for the newest quarter
10	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	6,051,771	5.30%	+2,919,101	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	STATE STREET CORP 13G CIK 93751 · Bank · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	6,051,771	5.30%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
10.2	State Street(R) SPDR(R) S&P(R) Biotech ETF Fund S000010018 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	4,036,281	3.54%	+2,322,786	Jun 30, 2026	SPDR SERIES TRUST, not summed
10.3	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	27,500	0.02%	+7,700	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
10.4	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	2,607	0.00%	+1,131	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
10.5	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	443	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
11	FARALLON CAPITAL MANAGEMENT LLC 13G CIK 909661 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution	5,583,479	4.89%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution
12	Dapice Joshua J. 13G CIK 1175707 · Unknown · Dec 31, 2025 Rule 13d-1(c), passive investor	5,427,479	4.75%	+1,950,252	Dec 31, 2025	Rule 13d-1(c), passive investor
13	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,436,572	3.89%	+57,616	Jun 30, 2026	carried, not yet filed for the newest quarter
14	Affinity Asset Advisors, LLC 13F CIK 1773195 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,214,582	3.69%	+1,050,000	Jun 30, 2026	carried, not yet filed for the newest quarter
15	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,805,739	3.33%	+239,235	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Spruce Street Capital LP 13F CIK 2050194 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,693,931	3.24%	+1,066,824	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Balyasny Asset Management L.P. 13F CIK 1218710 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,320,224	2.91%	+325,764	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	3,313,065	2.90%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
19	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,458,673	2.15%	+691,713	Jun 30, 2026	carried, not yet filed for the newest quarter
20	Nantahala Capital Management, LLC 13F CIK 1472322 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,325,450	2.04%	+2,325,450	Jun 30, 2026	carried, not yet filed for the newest quarter
21	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,912,550	1.68%	-1,070,792	Jun 30, 2026	carried, not yet filed for the newest quarter
22	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,733,078	1.52%	+491,262	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	23,414	0.02%	+12,740	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
23	Johnson Frances 13G CIK 1991777 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor	1,677,908	1.47%	—	Dec 31, 2023	Rule 13d-1(c), passive investor
24	Schultz Michael K 13G CIK 1992109 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor	1,677,908	1.47%	—	Dec 31, 2023	Rule 13d-1(c), passive investor
25	Nicholson Wealth Management Group, LLC 13F CIK 2035982 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,619,993	1.42%	+1,000	Jun 30, 2026	carried, not yet filed for the newest quarter
26	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,556,451	1.36%	+552,977	Jun 30, 2026	carried, not yet filed for the newest quarter
27	ADAR1 Capital Management, LLC 13F CIK 1940272 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,210,117	1.06%	+460,782	Jun 30, 2026	carried, not yet filed for the newest quarter
28	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,087,767	0.95%	+335,734	Jun 30, 2026	carried, not yet filed for the newest quarter
29	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,074,071	0.94%	+623,974	Jun 30, 2026	carried, not yet filed for the newest quarter
29.1	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	269,566	0.24%	+160,359	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
29.2	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	254,330	0.22%	-116,364	Jul 31, 2026	Dimensional ETF Trust, not summed
29.3	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	237,159	0.21%	+110,202	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
29.4	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	95,830	0.08%	—	Jul 31, 2026	Dimensional ETF Trust, not summed
29.5	U.S. VECTOR EQUITY PORTFOLIO Fund S000000982 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	48,875	0.04%	—	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
30	Yu Fan 13F CIK 1668029 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,055,409	0.92%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,017,864	0.89%	+58,240	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
32	Hills Bank & Trust Co 13F CIK 1309148 · Pension or benefit plan · Jun 30, 2026 carried, not yet filed for the newest quarter	872,200	0.76%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
33	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	791,774	0.69%	+262,846	Jun 30, 2026	carried, not yet filed for the newest quarter
33.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	53,460	0.05%	+26,665	Jun 30, 2026	Northern Funds, not summed
33.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	5,998	0.01%	-516	Jun 30, 2026	Northern Funds, not summed
34	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	773,262	0.68%	+111,944	Jun 30, 2026	carried, not yet filed for the newest quarter
34.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	405,058	0.35%	+112,662	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
34.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	251,300	0.22%	+119,122	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
34.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	63,522	0.06%	+958	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
34.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	53,471	0.05%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
35	Ally Bridge Group (NY) LLC 13F CIK 1822947 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	743,958	0.65%	-182,599	Jun 30, 2026	carried, not yet filed for the newest quarter
36	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	589,003	0.52%	+22,327	Jun 30, 2026	carried, not yet filed for the newest quarter
37	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	465,454	0.41%	+223,530	Jun 30, 2026	carried, not yet filed for the newest quarter
38	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	444,917	0.39%	-75,988	Jun 30, 2026	carried, not yet filed for the newest quarter
39	WealthPlan Investment Management, LLC 13F CIK 1929986 · Registered investment adviser · Sep 30, 2026	404,071	0.35%	0	Sep 30, 2026
40	VOYA INVESTMENT MANAGEMENT LLC 13F CIK 1068837 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	337,501	0.30%	+222,012	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	336,817	0.30%	-573,404	Jun 30, 2026	carried, not yet filed for the newest quarter
41.1	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	193,329	0.17%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
41.2	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	137,405	0.12%	+65,498	Jul 31, 2026	TIAA-CREF Funds, not summed
41.3	TIAA Separate Account VA-1 - Stock Index Account Fund S000005098 · Registered fund · Jun 30, 2026 TIAA Separate Account VA-1, not summed	282	0.00%	0	Jun 30, 2026	TIAA Separate Account VA-1, not summed
42	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	334,917	0.29%	+122,786	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Seven Fleet Capital Management LP 13F CIK 2092021 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	332,613	0.29%	-46,469	Jun 30, 2026	carried, not yet filed for the newest quarter
44	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	327,253	0.29%	+13,595	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	1,126,721	0.99%	+510,645	Jul 31, 2026	Fidelity Salem Street Trust, not summed
44.2	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	445,775	0.39%	+63,267	May 31, 2026	Fidelity Concord Street Trust, not summed
44.3	Select Biotechnology Portfolio Fund S000007486 · Registered fund · May 31, 2026 Fidelity Select Portfolios, not summed	258,600	0.23%	0	May 31, 2026	Fidelity Select Portfolios, not summed
44.4	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	168,934	0.15%	+43,948	May 31, 2026	Fidelity Concord Street Trust, not summed
44.5	Fidelity Small Cap Value Index Fund Fund S000065751 · Registered fund · Jun 30, 2026 Fidelity Salem Street Trust, not summed	144,625	0.13%	+67,284	Jun 30, 2026	Fidelity Salem Street Trust, not summed
45	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	319,770	0.28%	+24,911	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
46	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	297,722	0.26%	+112,387	Jun 30, 2026	carried, not yet filed for the newest quarter
47	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	293,782	0.26%	+256,465	Jun 30, 2026	carried, not yet filed for the newest quarter
48	VANGUARD HEALTH CARE INDEX FUND Fund S000004450 · Registered fund · May 31, 2026 VANGUARD WORLD FUND, not summed	288,380	0.25%	-2,447	May 31, 2026	VANGUARD WORLD FUND, not summed
49	PORTLAND INVESTMENT COUNSEL INC. 13F CIK 1081668 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	250,000	0.22%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
50	FEDERATED HERMES, INC. 13F CIK 1056288 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	217,023	0.19%	-5,119	Jun 30, 2026	carried, not yet filed for the newest quarter

18 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 189 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 728387 CUSIP 46489V302 13F (30d) 13 filings 13 filers Visit website Investor relations