[SCHEDULE 13G] Quantum-Si Incorporated SEC Filing

Rhea-AI Filing Summary

The Vanguard Group filed a Schedule 13G reporting passive ownership of Performant Healthcare Inc. (CUSIP 71377E105) as of 30 Jun 2025. Vanguard and its managed accounts beneficially own 3,920,924 common shares, equal to 5 % of the outstanding class.

Voting authority is minimal: 0 shares held with sole voting power and 58,706 shares with shared voting power. Dispositive authority is larger, with 3,838,322 shares under sole dispositive power and 82,602 shares under shared dispositive power. Vanguard is classified as an investment adviser (IA); the filing certifies that the securities are held in the ordinary course of business and not to influence control of the issuer. The filing was signed by Ashley Grim, Head of Global Fund Administration, on 29 Jul 2025.

Positive

• Institutional ownership crosses 5 % threshold, adding 3.92 million shares under Vanguard management, which can improve stock liquidity and visibility.

Negative

• Zero sole voting power indicates Vanguard cannot independently influence corporate governance despite sizable economic stake.

Insights

Securities Analyst

TL;DR: Vanguard discloses a passive 5 % stake; increases institutional ownership but offers no control intent—neutral for valuation.

Ownership of 3.9 million shares places Vanguard at the 5 % reporting threshold, confirming meaningful but not dominant exposure. Lack of sole voting power underscores Vanguard’s passive, index-tracking mandate; thus, no immediate governance impact is expected. Increased institutional presence can marginally enhance liquidity and investor confidence, yet does not, on its own, alter the company’s strategic outlook.

Corporate Governance Expert

TL;DR: Filing signals passive stake; governance influence limited due to zero sole voting power.

The Schedule 13G (versus 13D) confirms Vanguard’s intent is non-activist. With only shared voting on 58.7k shares, Vanguard is unlikely to sway shareholder proposals. The certification clause further distances the firm from control pursuits. From a governance viewpoint, the filing is routine and carries low impact on future board or policy decisions.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Quantum-Si Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

74765K105

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. 74765K105

1

Names of Reporting Persons

The Vanguard Group

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

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 123,487.00
7	Sole Dispositive Power 8,489,872.00
8	Shared Dispositive Power 179,789.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,669,661.00

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)

5.30 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Quantum-Si Inc
(b)	Address of issuer's principal executive offices: 530 OLD WHITFIELD ST, GUILFORD, CT, 06437
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd., Malvern, PA 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 74765K105
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: 8669661
(b)	Percent of class: 5.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 123487
	(iii) Sole power to dispose or to direct the disposition of: 8489872
	(iv) Shared power to dispose or to direct the disposition of: 179789
Item 5.	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. The Vanguard Group, Inc.'s clients, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein. No one other person's interest in the securities reported herein is more than 5%.
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.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	07/29/2025

FAQ

Who filed the Schedule 13G for PHLT?

The filing was made by The Vanguard Group as an investment adviser.

How many Performant Healthcare shares does Vanguard own?

Vanguard reports beneficial ownership of 3,920,924 common shares.

What percentage of PHLT's outstanding shares does this represent?

The holding equals 5 % of the class.

Does Vanguard have voting power over the shares?

It has 0 sole and 58,706 shared voting rights, signifying limited control.

Is Vanguard's stake activist or passive?

Filed on Schedule 13G, the stake is passive; Vanguard states no intent to influence control.

When was the ownership information effective?

The reporting date is 30 June 2025, with the signature dated 29 July 2025.