Impax reports 5.41% stake in Health Catalyst

Impax Asset Management Group plc, through its subsidiary Impax Asset Management LLC, reports beneficial ownership of common stock of Health Catalyst, Inc..

Rhea-AI Filing Summary

Impax Asset Management Group plc, through its subsidiary Impax Asset Management LLC, reports beneficial ownership of common stock of Health Catalyst, Inc.. The filing states beneficial ownership of 4,000,000 shares of common stock, representing 5.41% of the class as of the reporting date.

Impax Asset Management Group plc is identified as the parent holding company and 100% owner of Impax Asset Management LLC, which is described as the Investment Manager retaining investment discretion and control over the shares. The filing reports sole voting power and sole dispositive power over 4,000,000 shares, with no shared voting or dispositive power.

Key Figures

Shares beneficially owned: 4,000,000 shares Percent of class: 5.41% Sole voting power: 4,000,000 shares +3 more

6 metrics

Shares beneficially owned 4,000,000 shares Common stock of Health Catalyst, Inc. reported by Impax Asset Management Group plc

Percent of class 5.41% Portion of Health Catalyst common stock class beneficially owned

Sole voting power 4,000,000 shares Shares over which Impax reports sole power to vote or direct the vote

Sole dispositive power 4,000,000 shares Shares over which Impax reports sole power to dispose or direct disposition

Ownership of Investment Manager 100% Impax Asset Management Group plc ownership of Impax Asset Management LLC

CUSIP 42225T107 CUSIP for Health Catalyst, Inc. common stock

Key Terms

beneficially owned, sole voting power, sole dispositive power, parent holding company, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 4000000"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"(i) Sole power to vote or to direct the vote: 4000000"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"(iii) Sole power to dispose or to direct the disposition of: 4000000"

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.

parent holding company financial

"Impax Asset Management Group plc (the filing entity) is the parent company"

Investment Manager financial

"Impax Asset Management LLC, the Investment Manager, retains investment discretion"

FAQ

What percentage of Health Catalyst, Inc. (HCAT) shares does Impax Asset Management report owning?

Impax Asset Management reports beneficial ownership of 5.41% of Health Catalyst, Inc.’s common stock. This corresponds to 4,000,000 shares, giving the group a reportable passive stake under Schedule 13G rules.

How many Health Catalyst (HCAT) shares does Impax Asset Management beneficially own?

Impax Asset Management reports beneficial ownership of 4,000,000 shares of Health Catalyst common stock. The filing states this holding represents approximately 5.41% of the outstanding class of common stock.

Who holds voting and investment control over Health Catalyst (HCAT) shares for Impax?

Impax Asset Management LLC, described as the Investment Manager, retains investment discretion and control over the shares. The group reports sole voting power and sole dispositive power over 4,000,000 shares, with no shared powers.

What is the relationship between Impax Asset Management Group plc and Impax Asset Management LLC in the HCAT filing?

Impax Asset Management Group plc is disclosed as the parent company and 100% owner of Impax Asset Management LLC. The parent files the Schedule 13G while the subsidiary acts as Investment Manager for the Health Catalyst shares.

What class of Health Catalyst (HCAT) securities is reported in this Schedule 13G?

The holding relates to common stock, $0.01 par value per share of Health Catalyst, Inc. The filing also identifies the relevant CUSIP as 42225T107 for this class of securities.

Does Impax report any shared voting or dispositive power over Health Catalyst (HCAT) shares?

No. The Schedule 13G reports 0 shares with shared voting power and 0 shares with shared dispositive power. All 4,000,000 shares are reported with sole voting and sole dispositive power.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/21/2026 - 11:06 AM Accepted by SEC EDGAR 07/21/2026 - 11:06 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Health Catalyst, Inc.

(Name of Issuer)

Common stock, $0.01 par value per share

(Title of Class of Securities)

42225T107

(CUSIP Number)

06/30/2026

(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): 42225T107

1

Names of Reporting Persons

Impax Asset Management Group plc

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

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,000,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,000,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,000,000.00

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)

5.4 %

12

Type of Reporting Person (See Instructions)

HC

Comment for Type of Reporting Person: Impax Asset Management Group plc (the filing entity) is the parent company and 100% owner of Impax Asset Management LLC.

SCHEDULE 13G

CUSIP Number(s): 42225T107

1

Names of Reporting Persons

IMPAX ASSET MANAGEMENT LLC

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

NEW HAMPSHIRE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,000,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,000,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,000,000.00

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)

5.4 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: Impax Asset Management LLC, the Investment Manager, retains investment discretion and control over the shares.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Health Catalyst, Inc.
(b)	Address of issuer's principal executive offices: 10897 SOUTH RIVER FRONT PARKWAY, #300, SOUTH JORDAN, UTAH, 84095
Item 2.
(a)	Name of person filing: Impax Asset Management Group plc
(b)	Address or principal business office or, if none, residence: 7th Floor, 30 Panton Street, London, SW1Y 4AJ
(c)	Citizenship: UNITED KINGDOM
(d)	Title of class of securities: Common stock, $0.01 par value per share
(e)	CUSIP Number(s): 42225T107
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4000000
(b)	Percent of class: 5.41%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 4000000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4000000
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
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. Impax Asset Management Group plc (the filing entity) is the parent company and 100% owner of Impax Asset Management LLC.
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.

Impax Asset Management Group plc

Signature:	Karen Cockburn
Name/Title:	Chief Financial Officer
Date:	07/21/2026

IMPAX ASSET MANAGEMENT LLC

Signature:	Karen Cockburn
Name/Title:	Chief Financial Officer
Date:	07/21/2026