Westfield Capital reports zero BCYC holdings (BCYC) — amended 13G/A

Rhea-AI Filing Summary

BICYCLE THERAPEUTICS PLC ownership update: Westfield Capital Management Company, L.P. reports 0 shares of Common Stock, representing 0% of the class as of 02/28/2026. The amendment is signed by Brandi McMahon, Vice President, Deputy Chief Compliance Officer, dated 03/04/2026.

Insights

Institutional Holdings Analyst

Westfield reports no beneficial ownership in BCYC as of the stated date.

The filing amendment lists 0 shares and 0% ownership of Bicycle Therapeutics plc common stock, dated 02/28/2026. This indicates no current beneficial position reported by the named manager.

Disclosure is administrative; the cash‑flow treatment and any prior holdings or changes are not included in the excerpt.

Compliance & Governance Specialist

The amendment documents compliance with reporting requirements for sub‑5% holders.

The Schedule 13G/A lists the filer, address, citizenship (Massachusetts) and certifies ownership of 0 shares. The signature block shows the compliance officer and date 03/04/2026.

Recordkeeping and timely amendments are the primary governance signal here; material investor impact is not evident from the excerpt.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

BICYCLE THERAPEUTICS PLC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

02/28/2026

(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)

SCHEDULE 13G

CUSIP Number(s):

1

Names of Reporting Persons

Westfield Capital Management Company, L.P.

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

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power
8	Shared Dispositive Power

9

Aggregate Amount Beneficially Owned by Each Reporting Person

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)

0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: BICYCLE THERAPEUTICS PLC
(b)	Address of issuer's principal executive offices: BLOCKS A & B, PORTWAY BUILDING, GRANTA PARK, GREAT ABINGTON, CAMBRIDGE, UNITED KINGDOM CB21 6GS
Item 2.
(a)	Name of person filing: Westfield Capital Management Company, L.P.
(b)	Address or principal business office or, if none, residence: 1 Financial Center, 24th Floor Boston, Massachusetts 02111
(c)	Citizenship: Westfield Capital Management Company, L.P. - MASSACHUSETTS
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 088786108
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: 0
(b)	Percent of class: 0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Westfield Capital Management Company, L.P. - 0
	(ii) Shared power to vote or to direct the vote: Westfield Capital Management Company, L.P. - 0
	(iii) Sole power to dispose or to direct the disposition of: Westfield Capital Management Company, L.P. - 0
	(iv) Shared power to dispose or to direct the disposition of: Westfield Capital Management Company, L.P. - 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.
	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.
	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.

Westfield Capital Management Company, L.P.

Signature:	Brandi McMahon
Name/Title:	Vice President, Deputy Chief Compliance Officer
Date:	03/04/2026

FAQ

What does Westfield Capital report for BCYC ownership in this amendment?

Westfield Capital reports 0 shares of Bicycle Therapeutics common stock, representing 0% of the class as of 02/28/2026. The amendment is signed on 03/04/2026 by a compliance officer.

Who filed the Schedule 13G/A amendment for BCYC?

The Schedule 13G/A amendment was filed by Westfield Capital Management Company, L.P. with principal address at 1 Financial Center, Boston, MA, and lists Massachusetts as its place of organization.

Does the filing show any voting or dispositive power for Westfield over BCYC shares?

The amendment states Westfield has 0 shares with 0 sole and 0 shared voting power and 0 sole and 0 shared dispositive power in Bicycle Therapeutics common stock.

What is the significance of the signature and date on the amendment?

The amendment is signed by Brandi McMahon, Vice President, Deputy Chief Compliance Officer, dated 03/04/2026, certifying the accuracy of the reported 0 shares and compliance with Schedule 13G/A requirements.