Standard BioTools (LAB): Long Focus Capital discloses 23.5M shares, 6% passive stake

Rhea-AI Filing Summary

Standard BioTools Inc. has a significant shareholder reporting passive ownership on a Schedule 13G. Long Focus Capital Management, LLC and its controller, John Helmers, report beneficial ownership of 23,500,000 shares of Standard BioTools common stock, representing 6.0% of the class as of June 30, 2026. They hold no sole voting or dispositive power, but have shared voting and shared dispositive power over these shares pursuant to investment management agreements with their clients, on whose behalf the securities were purchased. No single client is said to own more than 5% of the outstanding common stock.

Key Figures

Shares beneficially owned: 23,500,000 shares Percent of class: 6.0% Shared voting power: 23,500,000 shares +4 more

7 metrics

Shares beneficially owned 23,500,000 shares Beneficial ownership by Long Focus Capital Management, LLC and John Helmers as of June 30, 2026

Percent of class 6.0% Percentage of Standard BioTools common stock class beneficially owned as of June 30, 2026

Shared voting power 23,500,000 shares Shares over which the reporting persons have shared power to vote or direct the vote

Sole voting power 0 shares Shares over which the reporting persons have sole power to vote or direct the vote

Shared dispositive power 23,500,000 shares Shares over which the reporting persons have shared power to dispose or direct disposition

Sole dispositive power 0 shares Shares over which the reporting persons have sole power to dispose or direct disposition

Reporting date June 30, 2026 Date as of which ownership information is reported

Key Terms

beneficially owned, dispositive power, shared voting power, shared dispositive power, +1 more

5 terms

beneficially owned financial

"Securities reported on this statement on as being beneficially owned by Long Focus Capital Management, LLC"

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.

dispositive power financial

"maintains dispositive and voting power with respect to the securities held in its clients' accounts"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

shared voting power financial

"6 | Shared Voting Power 23,500,000.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"8 | Shared Dispositive Power 23,500,000.00"

Schedule 13G regulatory

"Securities reported on this statement on as being beneficially owned"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What percentage of STANDARD BIOTOOLS INC. (LAB) shares does Long Focus Capital report?

Long Focus Capital Management, LLC and John Helmers report beneficial ownership of 6.0% of Standard BioTools’ common stock. This corresponds to 23,500,000 shares as of the close of business on June 30, 2026.

How many STANDARD BIOTOOLS INC. (LAB) shares are beneficially owned by Long Focus Capital?

Long Focus Capital Management, LLC and John Helmers beneficially own 23,500,000 shares of Standard BioTools common stock. These shares are held in client accounts over which Long Focus has shared voting and dispositive power as of June 30, 2026.

Does Long Focus Capital have sole or shared voting power over LAB shares?

Long Focus Capital Management, LLC and John Helmers have 0 shares with sole voting power and 23,500,000 shares with shared voting power. Voting authority arises from investment management agreements with their clients as of June 30, 2026.

Who actually owns the LAB shares managed by Long Focus Capital?

The 23,500,000 LAB shares reported are held in client accounts of Long Focus Capital Management, LLC. The firm states that no one client owns more than 5% of the class; Long Focus exercises voting and dispositive power under management agreements.

What role does John Helmers play in the LAB Schedule 13G filing?

John Helmers is the controller of Long Focus Capital Management, LLC and is a co-reporting person on the Schedule 13G. He is attributed with the same 23,500,000 shares and 6.0% beneficial ownership, all with shared voting and dispositive power.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/14/2026 - 06:09 AM Accepted by SEC EDGAR 08/14/2026 - 06:05 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

STANDARD BIOTOOLS INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

34385P108

(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): 34385P108

1

Names of Reporting Persons

LONG FOCUS CAPITAL 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 23,500,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 23,500,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

23,500,000.00

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)

6.0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 34385P108

1

Names of Reporting Persons

JOHN HELMERS

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 0.00
6	Shared Voting Power 23,500,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 23,500,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

23,500,000.00

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)

6.0 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: STANDARD BIOTOOLS INC.
(b)	Address of issuer's principal executive offices: 50 Milk Street, 10th Floor Boston, MA 02109
Item 2.
(a)	Name of person filing: LONG FOCUS CAPITAL MANAGEMENT LLC JOHN HELMERS
(b)	Address or principal business office or, if none, residence: 207 CALLE DEL PARQUE A&M TOWER, 8TH FLOOR SAN JUAN, PR 00912
(c)	Citizenship: Long Focus Capital Management, LLC, a Delaware single member limited liability company; and John Helmers, a United States citizen.
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 34385P108
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 each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026. Long Focus Capital Management, LLC and John Helmers directly own no Common Stock. Pursuant to investment management agreements with its clients, Long Focus Capital Management, LLC maintains dispositive and voting power with respect to the securities held in its clients' accounts. John Helmers controls Long Focus Capital Management, LLC.
(b)	Percent of class: The information required by Item 4(b) is set forth in Row (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026.
(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 each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026.
	(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 each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026.
	(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 each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026.
	(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 each Reporting Person hereto and is incorporated herein by reference for each Reporting Person. Such information is as of the close of business on June 30, 2026.
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.
	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. Securities reported on this statement on Schedule 13G as being beneficially owned by Long Focus Capital Management, LLC were purchased on behalf of its clients and no one client owns more than 5 percent of a class of such securities.
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.

LONG FOCUS CAPITAL MANAGEMENT, LLC

Signature:	/s/ John Helmers
Name/Title:	Managing Member
Date:	08/14/2026

JOHN HELMERS

Signature:	/s/ John Helmers
Name/Title:	John Helmers
Date:	08/14/2026