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Cosigo Resources Announces Acquisition of Conglomerate Layer Bulk Sample for Gravity Concentration Tests and Private Placement

VICTORIA, CANADA – December 31, 2025 – TheNewswire - Cosigo Resources Ltd. (“Cosigo” or the “Company”) (TSXV: CSG).

Conglomerate Bulk Samples

Cosigo’s field team in recent weeks acquired a 120 kilo bulk sample from outcroppings of “Chicken Coop” conglomerate material for prospecting analysis. The source area is located south of Cosigo’s field camp within the Taraira title. Samples were hand chipped by Company employees supervised by geological consultants and management, packaged securely, and are being forwarded to analytical facilities in Vancouver, Canada.

Cosigo’s geological team, as reported in News Release dated 10 August 2023, located by reconnaissance prospecting outcroppings of conglomerate stratum type material apparently distinct from similar material that had been mined by artisanal miners elsewhere in the area. The News Release included analytical results for 14 channel samples from the 1019 metre strike length of outcroppings. It was announced at that time that further testing of this layer was planned and analyses would be released when available. The samples were subsequently tested by the non-destructive Chrysos assay system by MSA Lab, an accredited laboratory located in BC, Canada.

Analyses for the channel samples are reproduced here for reference purposes:

	Sample	PWE-100	CPA-Mass	CPA-Au1
	Type	Rec. Wt.	Ana. Wt.	Au
		Kg	g	ppm
Sample ID
1246662	Rock	2.92	463.1	1.106
1246664	Rock	2.90	450.0	0.040
1246666	Rock	2.68	406.3	0.348
1246669	Rock	2.92	449.9	0.506
1246670	Rock	2.86	455.7	0.751
1246671	Rock	2.94	423.6	0.537
1246672	Rock	2.94	433.8	0.104
1246673	Rock	2.78	432.8	<0.015
1246674	Rock	2.86	427.9	0.021
1246675	Rock	2.94	401.8	<0.015
1246676	Rock	2.92	501.6	0.021
1246677	Rock	2.86	452.0	0.025
1246678	Rock	2.94	481.7	0.019
1246710	Rock	2.80	508.1	0.479
1246757	Rock	2.88	439.3	0.096
1246758	Rock	2.80	439.6	0.033
1246759	Rock	2.88	446.6	0.019
1246760	Rock	2.86	448.2	0.422
1246761	Rock	2.74	500.1	<0.015
1246768	Rock	2.84	465.6	1.558
1246769	Rock	2.84	464.6	0.066
MER12	Rock	0.36	323.1	0.018

Drilling in 2024, as previously reported in detail, intercepted what it believes is the same “Chicken Coop” conglomerate layer. Analyses, identified below in grey with greater than 0.50 ppm gold highlighted in yellow, were obtained from core samples.

Meter		Sample	[ALS] Au-AA26Auppm
11.0	Core	1	0.02	white sandstone fine grain presence of oxid. with quartz veins
11.7	Core	2	0.01	white sandstone fine grain presence of oxid. with quartz veins
12.5	Core	3	1.23	white sandstone fine grain presence of oxid. with quartz veins
13.2	Core	4	0.07	white sandstone fine grain presence of oxid. with quartz veins
14.0	Core	5	0.17	white sandstone fine grain presence of oxid. with quartz veins
14.8	Core	6	0.03	white sandstone fine grain presence of oxid. with quartz veins
15.5	Core	7	0.02	white sandstone fine grain presence of oxid. with quartz veins
16.3	Core	8	0.04	white sandstone fine grain presence of oxid. with quartz veins
17.1	Core	9	0.01	white sandstone fine grain presence of oxid. with quartz veins
17.8	Core	10	0.01	white sandstone fine grain presence of oxid. with quartz veins
18.6	Core	11	0.02	white sandstone fine grain presence of oxid. with quartz veins
19.3	Core	12	<0.01	white sandstone fine grain presence of oxid. with quartz veins
20.1	Core	13	0.02	white sandstone fine grain presence of oxid. with quartz veins
20.9	Core	14	<0.01	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
21.6	Core	15	0.02	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
22.4	Core	16	0.14	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
23.2	Core	17	0.03	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
23.9	Core	18	<0.01	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
24.7	Core	19	<0.01	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
25.4	Core	20	0.01	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
26.2	Core	21	0.52	Polymictic conglomerate siliceous matrix cement, quartzite clasts, ryolitic tuff, arenite quartz
27.0	Core	22	<0.01	white sandstone fine grain presence of oxid. with quartz veins
27.7	Core	23	<0.01	white sandstone fine grain presence of oxid. with quartz veins
28.5	Core	24	<0.01	white sandstone fine grain presence of oxid. with quartz veins
29.3	Core	25	0.01	white sandstone fine grain presence of oxid. with quartz veins
30.0	Core	26	0.01	white sandstone fine grain presence of oxid. with quartz veins
30.8	Core	27	0.01	fault breccia. Molonitic texture, serecitized.
31.5	Core	28	0.03	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
32.3	Core	29	<0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
33.1	Core	30	<0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
33.8	Core	31	<0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
34.6	Core	32	0.05	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
35.3	Core	33	<0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
36.1	Core	34	0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
36.9	Core	35	0.01	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
37.6	Core	36	0.03	white sandstone fine grain presence of oxid. with quartz veins, pyritization presence of Mn
38.4	Core	37	0.17	white sandstone of fine grain with oxidation and parallel lamination
39.2	Core	38	<0.01	white sandstone of fine grain with oxidation and parallel lamination
39.9	Core	39	0.02	white sandstone of fine grain, oxidation, presence of Goethite and Siltstone
40.7	Core	40	0.08	white sandstone of fine grain and parallel lamination
41.4	Core	41	0.11	white sandstone of fine grain and presence of oxidation
42.2	Core	42	0.02	white sandstone of fine grain and presence of oxidation
43.0	Core	43	0.02	white sandstone of fine grain and presence of oxidation
43.7	Core	44	0.08	white sandstone of fine grain and presence of oxidation
44.5	Core	45	0.02	white sandstone of fine grain and presence of oxidation
45.3	Core	46	0.17	white sandstone fine grain presence of oxid., with quartz veins and presence of Mn
46.0	Core	47	0.11	white sandstone fine grain presence of oxid., with quartz veins and presence of Mn
46.8	Core	48	0.19	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
47.5	Core	49	0.02	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
48.3	Core	50	0.01	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
49.1	Core	51	0.01	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
49.8	Core	52	0.05	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
50.6	Core	53	<0.01	white sandstone of fine grain with presence of iron nodules. Presence of oxidation.
51.3	Core	54	0.02	white silicified sandstone fine grain presence of oxid. with quartz veins, presence of Mn
52.1	Core	55	0.03	white silicified sandstone fine grain presence of oxid., quartz veins, presence of Mn
52.9	Core	56	0.02	white sandstone of fine grain with presence of oxidation, oolitic hematite, quartz veins.
53.6	Core	57	0.02	white sandstone of fine grain with presence of oxidation and parallel lamination
54.4	Core	58	0.01	white sandstone of fine grain with presence of oxidation and parallel lamination
55.2	Core	59	0.01	Andesite dyke, silicified sandstone
55.9	Core	60	<0.01	Andesite dyke, silicified sandstone
56.7	Core	61	<0.01	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
57.4	Core	62	0.01	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
58.2	Core	63	0.07	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
59.0	Core	64	<0.01	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
59.7	Core	65	0.11	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
60.5	Core	66	1.13	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
61.3	Core	67	0.05	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
62.0	Core	68	0.37	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
62.8	Core	69	1.74	white sandstone fine grain, presence of oxid., quartz veins and presence of Mn and iron.
63.5	Core	70	11.3	white sandstone of fine grain with presence of oxidation, with quartz veins and iron. Mn Druse.
64.3	Core	71	0.1	white sandstone of fine grain with presence of oxidation, with quartz veins and iron. Mn Druse.
65.1	Core	72	0.02	white sandstone fine grain, presence of oxid, quartz veins and iron. Presence of Au disseminated.
65.8	Core	73	0.1	white sandstone fine grain, presence of oxid, quartz veins and iron. Presence of Au disseminated.
66.6	Core	74	0.63	white sandstone fine grain, presence of oxid, quartz veins and iron. Presence of Au disseminated.
67.3	Core	75	0.51	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
68.1	Core	76	0.07	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
68.9	Core	77	0.17	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
69.6	Core	78	0.1	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
70.4	Core	79	0.03	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
71.2	Core	80	0.01	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
71.9	Core	81	0.04	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
72.7	Core	82	0.16	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation
73.4	Core	83	0.23	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation. Mn veining
74.2	Core	84	0.11	sandstone medium to fine grain, presence of parallel lamination and oolitic oxidation. Mn veining
75.0	Core	85	0.08	Argillitic + serecitic alteration, presence of stockworks hematite with very seriticized chlorite suture
75.7	Core	86	0.13	Argillitic + serecitic alteration, presence of stockworks hematite with very seriticized chlorite suture
76.5	Core	87	0.15	Argillitic + serecitic alteration, presence of stockworks hematite with very seriticized chlorite suture
77.3	Core	88	0.06	very seriticized sandstone, with sericite and quartz
78.0	Core	89	0.37	very seriticized sandstone, with sericite and quartz
78.8	Core	90	0.02	very seriticized sandstone, with sericite and quartz
79.5	Core	91	0.07	very seriticized sandstone, with sericite and quartz
80.3	Core	92	<0.01	silicified sandstone with sericitization and quartz. Presence of quartz, iron, Mn, chlorite.
81.1	Core	93	0.02	silicified sandstone with sericitization and quartz. Presence of quartz, iron, Mn, chlorite.
81.8	Core	94	0.15	silicified sandstone with oxidation
82.6	Core	95	<0.01	silicified sandstone with oxidation
83.4	Core	96	0.09	silicified sandstone with oxidation
84.1	Core	97	0.02	silicified sandstone with oxidation
84.9	Core	98	0.01	silicified sandstone with oxidation
85.6	Core	99	0.21	silicified sandstone with oxidation
86.4	Core	100	<0.01	silicified sandstone with oxidation
87.0	Core	101	0.2	silicified sandstone with oxidation

The Company has not satisfactorily identified the conglomerate as “Chicken Coop” and further work is required. Similar outcroppings have been found along as much as 27 kms of the host ridge and further prospecting and mapping may lead to identification of related quartzite layers that are highly prospective. These may not be Chicken Coop rocks but alternatively may be a wholly different horizon that had not been recognized previously.

The 120 kg sample of apparent “Chicken Coop” conglomerate will be treated by gravity concentration methods: the exact method will be selected in consultation with the lab’s personnel. Separately, a 4 or 5 drill hole campaign to obtain strata samples will be directed to the Taraira Ridge using the Company’s portable drill. Samples will allow better identification, characterization and analysis and remove uncertainties. Further drilling may follow.

Private Placement

The Private Placement of up to CAD$1,000,000, previously announced and initiated on December 10, 2025, comprises Units priced at CAD$0.08 with a full warrant priced at CAD$0.15. Each warrant will entitle the holder to purchase an additional common share at a price of CAD$0.15 for a period of 60 months from the date of closing of the Private Placement.

The Private Placement is being offered on a non-brokered basis and all Securities, pursuant to Securities laws in Canada and where applicable, the TSX Venture Exchange Hold Period, will be subject to a statutory hold period of four months and a day from the closing date of the Offering. The Company may pay a finder’s fee on a portion of the gross proceeds of the Private Placement that is subject to the approval of the TSX Venture Exchange.

The Company intends to use the net proceeds of the Offering to conduct the next level of prospecting, mapping and sampling on the Company’s Taraira property, the Willow Creek, Nevada, property and for general working capital.

Erik Ostensoe, P.Geo., a geological consultant to the Company and a Qualified Person as defined by National Instrument 43-101, has reviewed and approves the scientific and technical disclosure in this news release.

About Cosigo Resources

Cosigo Resources Ltd. is a junior exploration company trading on the TSX Venture Exchange (symbol CSG.V). The Company is focused on exploring and developing the gold potential of its properties in the Taraira District in south-east Colombia near the border of Brazil. The Company also holds a 100% interest in the Willow Creek property, located in the northern sierras of Nevada near Winnemucca, a 100% interest in the Damian property in the Cordillera region of Colombia, and owns 13.26% of DHK Diamonds Inc. a company exploring for diamonds in the DO27 region of the NorthWest Territories of Canada.

To find out more about Cosigo Resources visit our website at www.cosigo.com.

FOR MORE INFORMATION CONTACT:
Cosigo Resources Ltd.

Andy Rendle
President & COO
Andy@Cosigo.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the Policies of the TSX-Venture Exchange) accepts responsibility for the adequacy or accuracy of this Release.

Cautionary and Forward-Looking Statements

This news release contains forward‐looking statements and forward‐looking information within the meaning of applicable securities laws. These statements relate to future events or future performance. All statements other than statements of historical fact may be forward‐looking statements or information. Forward‐looking statements and information are often, but not always, identified by the use of words such as “appear”, “seek”, “anticipate”, “plan”, “continue”, “estimate”, “approximate”, “expect”, “may”, “will”, “project”, “predict”, “potential”, “targeting”, “intend”, “could”, “might”, “should”, “believe”, “would” and similar expressions.

Forward-looking statements and information are provided for the purpose of providing information about the current expectations and plans of management of the Company relating to the future. Readers are cautioned that reliance on such statements and information may not be appropriate for other purposes, such as making investment decisions. Since forward‐looking statements and information address future events and conditions, by their very nature they involve inherent risks and uncertainties. Actual results could differ materially from those currently anticipated due to a number of factors and risks. These include, but are not limited to, the expected timing and terms of the private placement, use of proceeds, anticipated work program, required approvals in connection with the work program and the ability to obtain such approvals. Accordingly, readers should not place undue reliance on the forward‐looking statements, timelines and information contained in this news release. Readers are cautioned that the foregoing list of factors is not exhaustive.

The forward‐looking statements and information contained in this news release are made as of the date of this news release and no undertaking is given to update publicly or revise any forward‐looking statements or information, whether as a result of new information, future events or otherwise, unless so required by applicable securities laws or the TSX Venture Exchange. The forward-looking statements or information contained in this news release are expressly qualified by this cautionary statement.

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Cosigo Resources Announces Acquisition of Conglomerate Layer Bulk Sample for Gravity Concentration Tests and Private Placement