6K ADDITIVE, INC. — Major Shareholding Notification 2026

May 26, 2026

** INBOUND NOTIFICATION : FAX RECEIVED SUCCESSFULLY **

TIME RECEIVED May 27, 2026 at 4:14:09 PM GMT+10

REMOTE CSID DURATION 138 PAGES 5 STATUS Received

27-May-2026 06:11 UTC To: 611380135638

Tribeca

Investment Partners

Tribeca Investment Partners Pty Ltd

Level 23, 1 O'Connell Street

Sydney NSW 2000

T.+61 2 8640 2600

F.+61 2 8640 2640

www.tribecaip.com.au

ABN 64 880 430 100 AFSL 238070

FaxTo: Company Announcement

Organisation: ASX

Fax: 1300 135 638

From: Ken Liu

Pages: 5 (Including cover sheet)

Date: 27 May 2026

Re: Notice of change of interests of substantial shareholder

Message:

Please find attached Notice of change of interests of substantial holder for 6K Additive, Inc. (ASX:6KA).

Regards

Ken Liu

Compliance Manager

Encl.

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27-May-2026 06:12 UTC To: 611300135638
604 Page 1 of 2 15 July 2001

Form 604

Corporations Act 2001

Section 671B

Notice of change of interests of substantial holder

To Company Name/Scheme	6K Additive, Inc. (ASX:6KA)
ACN/ARSN	ARBN 692 243 646

1. Details of substantial holder (1)

Name	Tribeca Investment Partners Pty Ltd
ACN/ARSN (if applicable)	080 430 100
There was a change in the interests of the substantial holder on	25/05/2026
---	---
The previous notice was given to the company on	10/02/2026
The previous notice was dated	10/02/2026

2. Previous and present voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows:

Class of securities (4)	Previous notice		Present notice
	Person's votes	Voting power (5)	Person's votes	Voting power (5)
CDIs	33,963,219	12.71%	36,832,550	13.78%

3. Changes in relevant interests

Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows:

Date of change	Person whose relevant interest changed	Nature of change (6)	Consideration given in relation to change (7)	Class and number of securities affected	Person's votes affected
Annexure A

4. Present relevant interests

Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows:

Holder of relevant interest	Registered holder of securities	Person entitled to be registered as holder (8)	Nature of relevant interest (6)	Class and number of securities	Person's votes
Annexure B

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27-May-2026 06:12 UTC To: 611300135638

604 Page 2 of 2 15 July 2001

5. Changes in association

The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their association (9) with, the substantial holder in relation to voting interests in the company or scheme are as follows:

Name and ACN/ARSN (if applicable)	Nature of association
N/A

6. Addresses

The addresses of persons named in this form are as follows:

Name	Address
Tribeca Investment Partners Pty Ltd	Level 23, 1 O'Connell Street, Sydney NSW 2000
Tribeca Capital Advisory Pty Ltd	Level 23, 1 O'Connell Street, Sydney NSW 2000

Signature

print name	Ken Liu	capacity	Compliance Manager
sign here	☑	date	27/05/2026

DIRECTIONS

(1) If there are a number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in paragraph 6 of the form.

(2) See the definition of "associate" in section 9 of the Corporations Act 2001.

(3) See the definition of "relevant interest" in sections 608 and 671B(7) of the Corporations Act 2001.

(4) The voting shares of a company constitute one class unless divided into separate classes.

(5) The person's votes divided by the total votes in the body corporate or scheme multiplied by 100.

(6) Include details of:

(a) any relevant agreement or other circumstances because of which the change in relevant interest occurred. If subsection 671B(4) applies, a copy of any document setting out the terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract, scheme or arrangement, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; and

(b) any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities to which the relevant interest relates (indicating clearly the particular securities to which the qualification applies).

See the definition of "relevant agreement" in section 9 of the Corporations Act 2001.

(7) Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition. Details must be included even if the benefit is conditional on the happening or not of a contingency. Details must be included of any benefit paid on behalf of the substantial holder or its associate in relation to the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired.

(8) If the substantial holder is unable to determine the identity of the person (eg. if the relevant interest arises because of an option) write "unknown".

(9) Give details, if appropriate, of the present association and any change in that association since the last substantial holding notice.

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27-May-2026 06:13 UTC To: 611300135638
p. 4

This is Annexure A of 1 page referred to in Form 604 Notice of change in substantial shareholding.

27-May-2026

Authorised signatory
Ken Liu

Date

1. Changes in relevant Interests
Date of change	Person whose relevant interest changed	Nature of change / Consideration given in realtion to change			Class and Number of securities	Persons votes
23-Feb-26	Tribeca Investment Partners Pty Ltd as investment manager	On-market buy	AUO	9,335.30	CDI	11,549	11,549
23-Feb-26		On-market buy	AUO	61,567.39	CDI	76,167	76,167
23-Feb-26		On-market buy	AUO	27,798.97	CDI	34,391	34,391
23-Feb-26		On-market buy	AUO	2,338.47	CDI	2,893	2,893
25-Feb-26		On-market buy	AUO	15,240.78	CDI	18,207	18,207
25-Feb-26		On-market buy	AUO	1,714.35	CDI	2,048	2,048
25-Feb-26		On-market buy	AUO	9,667.48	CDI	11,549	11,549
25-Feb-26		On-market buy	AUO	63,758.18	CDI	76,167	76,167
25-Feb-26		On-market buy	AUO	28,788.16	CDI	34,391	34,391
25-Feb-26		On-market buy	AUO	2,421.68	CDI	2,893	2,893
27-Feb-26		On-market buy	AUO	26,973.97	CDI	29,797	29,797
27-Feb-26		On-market buy	AUO	425,655.03	CDI	470,203	470,203
03-Mar-26		On-market buy	AUO	5,114.11	CDI	5,960	5,960
03-Mar-26		On-market buy	AUO	80,693.09	CDI	94,040	94,040
09-Mar-26		On-market buy	AUO	38,917.33	CDI	46,894	46,894
10-Mar-26		On-market buy	AUO	45,157.53	CDI	55,517	55,517
11-Mar-26		On-market buy	AUO	3,946.47	CDI	4,661	4,661
26-Mar-26		On-market buy	AUO	37,562.90	CDI	50,000	50,000
26-Mar-26		On-market buy	AUO	75,125.80	CDI	100,000	100,000
31-Mar-26		On-market buy	AUO	10,490.56	CDI	13,694	13,694
31-Mar-26		On-market buy	AUO	94,889.26	CDI	123,865	123,865
31-Mar-26		On-market buy	AUO	9,530.68	CDI	12,441	12,441
28-Apr-26		On-market buy	AUO	178,302.45	CDI	229,340	229,340
28-Apr-26		On-market buy	AUO	16,062.30	CDI	20,660	20,660
29-Apr-26		On-market buy	AUO	4,625.25	CDI	5,476	5,476
29-Apr-26		On-market buy	AUO	29,707.68	CDI	35,172	35,172
29-Apr-26		On-market buy	AUO	12,164.51	CDI	14,402	14,402
29-Apr-26		On-market buy	AUO	4,181.81	CDI	4,951	4,951
30-Apr-26		On-market buy	AUO	15,413.16	CDI	17,002	17,002
30-Apr-26		On-market buy	AUO	101,297.90	CDI	111,740	111,740
30-Apr-26		On-market buy	AUO	41,370.41	CDI	45,635	45,635
30-Apr-26		On-market buy	AUO	14,163.03	CDI	15,623	15,623
05-May-26		On-market buy	AUO	12,456.00	CDI	14,618	14,618
18-May-26		On-market buy	AUO	11,381.76	CDI	14,295	14,295
18-May-26		On-market buy	AUO	74,606.09	CDI	93,702	93,702
18-May-26		On-market buy	AUO	30,735.94	CDI	38,603	38,603
18-May-26		On-market buy	AUO	10,669.16	CDI	13,400	13,400
19-May-26		On-market buy	AUO	7,324.16	CDI	9,107	9,107
19-May-26		On-market buy	AUO	48,016.79	CDI	59,705	59,705
19-May-26		On-market buy	AUO	19,776.11	CDI	24,590	24,590
19-May-26		On-market buy	AUO	6,906.76	CDI	8,588	8,588
20-May-26		On-market buy	AUO	3,010.69	CDI	3,811	3,811
20-May-26		On-market buy	AUO	19,778.44	CDI	25,036	25,036
20-May-26		On-market buy	AUO	8,140.16	CDI	10,304	10,304
20-May-26	On-market buy	AUO	2,833.73	CDI	3,587	3,587
22-May-26	On-market buy	AUO	16,145.74	CDI	22,420	22,420
22-May-26	On-market buy	AUO	105,902.23	CDI	147,056	147,056
22-May-26	On-market buy	AUO	43,586.30	CDI	60,524	60,524
22-May-26	On-market buy	AUO	9,770.26	CDI	13,567	13,567
25-May-26	On-market buy	AUO	34,313.40	CDI	47,265	47,265
25-May-26	On-market buy	AUO	225,180.54	CDI	310,175	310,175
25-May-26	On-market buy	AUO	92,701.71	CDI	127,692	127,692
25-May-26	On-market buy	AUO	31,912.58	CDI	43,958	43,958

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27-May-2026 06:13 UTC To: 611300135638
p.5

This is Annexure B of 1 page referred to in Form 654 Notice of change in substantial shareholding.

27-May-2026

Authorised signatory
Ken Liu

Date

Prepaid relevant interest:
Holder of Relevant Interest	Registered Holder of Securities	Person entitled to be registered as holder	Nature of Relevant Interest	Class and number of securities		Person's votes
Tribeca Investment Partners Pty Ltd	Lotti Nominees Pty Ltd	N/A	Power to control the exercise of a right to vote attached to securities and / or the power to dispose of securities as investment Manager	C01	16,221,913	16,221,913
	HIBK: Custody Nominees (Australia) Limited			C01	12,576,321	12,576,321
	EliSway Nominees Pty Ltd			C01	4,675,074	4,675,074
	JP Morgan Nominees Aust Ltd			C01	1,754,932	1,754,932
	Switame Nominees Ltd			C01	1,132,272	1,132,272
Tribeca Capital Advisory Pty Ltd	Tribeca Capital Advisory Pty Ltd	N/A	Direct Interest	C01	275,075	275,075