Woodline reports 292,437 shares of Outset Medical (1.6%)

Outset Medical, Inc. disclosure amendment: Woodline Partners reports beneficial ownership of 292,437 shares of Outset Medical common stock, representing 1.6% based on 18,311,626 shares outstanding as of February 10, 2026.

Rhea-AI Filing Summary

Outset Medical, Inc. disclosure amendment: Woodline Partners reports beneficial ownership of 292,437 shares of Outset Medical common stock, representing 1.6% based on 18,311,626 shares outstanding as of February 10, 2026. The shares are held directly by Woodline Master Fund LP and Woodline reports sole voting and dispositive power over 292,437 shares.

The filing is an amendment to a prior Schedule 13G and cites the Company’s Annual Report for the outstanding share count as of February 10, 2026.

Insights

Institutional Ownership Analyst

Woodline holds a small passive stake in Outset Medical (1.6%).

Woodline Partners reports 292,437 shares beneficially owned by its fund, with sole voting and dispositive power. The position is disclosed as passive under a Schedule 13G amendment and is below the 5% reporting threshold that signals larger ownership influence.

Share-count and percentage are tied to the Company’s reported 18,311,626 shares outstanding as of February 10, 2026; subsequent filings would be required if the stake grows above regulatory thresholds.

Compliance & Regulatory Advisor

Amendment clarifies ownership and confirms voting/dispositive powers.

The statement identifies Woodline Partners as the reporting adviser to Woodline Master Fund LP and includes the fund’s business address and Delaware organization status. The document explicitly states it should not be construed as an admission of beneficial ownership for Section 13 purposes.

Investors can expect routine Schedule 13G/A reporting when passive holdings change; the filing attaches the February 10, 2026 outstanding share base for percentage calculation.

Key Figures

Shares owned: 292,437 shares Percent of class: 1.6% Shares outstanding: 18,311,626 shares +1 more

4 metrics

Shares owned 292,437 shares Beneficially owned by Woodline Master Fund LP

Percent of class <percent>1.6%</percent> Calculated using shares outstanding as of <date>February 10, 2026</date>

Shares outstanding 18,311,626 shares Outstanding as of <date>February 10, 2026</date> per the Companys Annual Report

CUSIP 690145206 Outset Medical common stock CUSIP

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"This statement is filed by Woodline Partners LP"

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.

beneficially owned financial

"Amount beneficially owned: The information required by Item 4(a)"

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 dispositive power regulatory

"Sole Dispositive Power 292,437.00"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Woodline Partners report in Outset Medical (OM)?

Woodline Partners reports beneficial ownership of 292,437 shares, equal to 1.6% of Outset Medical based on February 10, 2026 outstanding shares.

How was the 1.6% ownership percentage calculated?

The 1.6% is calculated using 18,311,626 shares outstanding as of February 10, 2026, as reported in the Company’s Annual Report referenced in the amendment.

Does Woodline have voting control over the reported shares?

Yes; the filing states Woodline has sole voting power and sole dispositive power over the 292,437 shares reported as owned by the Woodline Fund.

Is this filing an initial ownership report or an amendment?

This submission is an Amendment No. 1 to a Schedule 13G (13G/A), which updates or clarifies previously reported ownership details rather than signaling a new initial filing.

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

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Accepted by SEC EDGAR 05/15/2026 - 09:06 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Outset Medical, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

690145206

(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): 690145206

1

Names of Reporting Persons

Woodline Partners LP

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 292,437.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 292,437.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

292,437.00

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)

1.6 %

12

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Outset Medical, Inc.
(b)	Address of issuer's principal executive offices: 3052 Orchard Dr., San Jose, California 95134
Item 2.
(a)	Name of person filing: This statement is filed by Woodline Partners LP ("Woodline Partners" or the "Reporting Person"), a Delaware limited partnership, and the investment adviser to Woodline Master Fund LP (the "Woodline Fund"), with respect to the shares of common stock, par value $0.001 per share ("Common Stock"), of Outset Medical, Inc. (the "Company") directly held by the Woodline Fund. The filing of this statement should not be construed as an admission that any of the foregoing persons or the Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the shares of Common Stock reported herein.
(b)	Address or principal business office or, if none, residence: The address of the business office of Woodline Partners is 4 Embarcadero Center, Suite 3450, San Francisco, CA 94111.
(c)	Citizenship: Woodline Partners is a Delaware limited partnership.
(d)	Title of class of securities: Common Stock, par value $0.001 per share
(e)	CUSIP No.: 690145206
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: The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 18,311,626 shares of Common Stock outstanding as of February 10, 2026, as reported in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission on February 13, 2026.
(b)	Percent of class: 1.6%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference.
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. See Item 2(a).
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
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.

Woodline Partners LP

Signature:	/s/ Erin Mullen
Name/Title:	Erin Mullen, General Counsel & Chief Compliance Officer
Date:	05/15/2026