BlackRock stake in Perspective Therapeutics (CATX): 5.25M shares

Rhea-AI Filing Summary

BlackRock, Inc. reports beneficial ownership of 5,251,363 shares of Perspective Therapeutics Inc. common stock, representing 4.6% of the class as disclosed in this Amendment No. 1 to Schedule 13G/A. The report attributes holdings to certain Reporting Business Units of BlackRock and is signed on 04/27/2026.

Key Figures

Amount beneficially owned: 5,251,363 shares Percent of class: 4.6% Sole voting power: 5,189,434 shares +2 more

5 metrics

Amount beneficially owned 5,251,363 shares Amount beneficially owned reported in Item 4(a)

Percent of class 4.6% Percent of class reported in Item 4(b)

Sole voting power 5,189,434 shares Sole power to vote reported in Item 4(c)(i)

Sole dispositive power 5,251,363 shares Sole power to dispose reported in Item 4(c)(iii)

Schedule signature date 04/27/2026 Signature date on the amendment

Key Terms

Schedule 13G/A, Beneficial ownership, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) PERSPECTIVE THERAPEUTICS INC Common Stock"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"this reflects the securities beneficially owned, or deemed to be beneficially owned"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 5251363"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

PERSPECTIVE THERAPEUTICS INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

46489V302

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 46489V302

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,189,434.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,251,363.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,251,363.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.6 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: PERSPECTIVE THERAPEUTICS INC
(b)	Address of issuer's principal executive offices: 2401 ELLIOTT AVENUE, SUITE 320 SEATTLE WA 98121
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 46489V302
Item 4.	Ownership
(a)	Amount beneficially owned: 5251363
(b)	Percent of class: 4.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5189434
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5251363
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of PERSPECTIVE THERAPEUTICS INC. No one person's interest in the common stock of PERSPECTIVE THERAPEUTICS INC is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/27/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

How many shares of Perspective Therapeutics (CATX) does BlackRock report owning?

BlackRock reports owning 5,251,363 shares of Perspective Therapeutics common stock. The filing states this equals 4.6% of the class and attributes the holdings to certain Reporting Business Units of BlackRock.

Does BlackRock control voting or disposition rights over these CATX shares?

The filing shows BlackRock has sole voting power for 5,189,434 shares and sole dispositive power for 5,251,363 shares. Shared voting and dispositive powers are reported as zero in the Schedule 13G/A amendment.

What does this Schedule 13G/A amendment for CATX indicate about intent to influence Perspective Therapeutics?

The Schedule 13G/A amendment reports passive beneficial ownership by Reporting Business Units; it does not assert activist intent. The schedule classifies holdings under the ownership reporting framework and does not state any intent to influence management or control.

When was the BlackRock Schedule 13G/A amendment for CATX signed and filed?

The signature block shows the filing was signed by Spencer Fleming on 04/27/2026. The cover section lists the relevant CUSIP and an effective date reference of 03/31/2026 associated with the reported holdings.