GOSS - Gossamer Bio, Inc. - Insider Stock Trading

Filing Date	T Date	Ticker	Sector	Ind	Industry	Owner	oSt	Rel	Title	T	TVal	Price	Qty	oc	Own	H
8/20/25 16:04	8/19/25	GOSS	Health	Drug	Pharmaceutical Preparations	Milligan Sandra	CA	D		P	50	1.92	26	81	58	D
6/25/24 18:24	6/24/24	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-1	0.6605	-2	-1	199	D
6/24/24 17:52	6/21/24	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	DO	P,CEO	P	250	0.6728	372	7	5,528	I
6/20/24 20:21	6/18/24	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	P	59	0.5911	100	26	480	I
6/20/24 20:20	6/17/24	GOSS	Health	Drug	Pharmaceutical Preparations	Smith Robert Paul Jr	CA	O	Chief Co	P	15	0.6020	25	New	25	I
3/28/24 18:16	3/27/24	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,Tech	S	-7	1.16	-6	-1	654	D
3/28/24 18:05	3/27/24	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	S	-7	1.16	-6	-1	473	D
3/28/24 18:01	3/27/24	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	DO	P,CEO	S	-27	1.16	-23	0	5,156	D
3/19/24 18:50	3/18/24	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-5	1.33	-4	-2	199	D
3/19/24 18:50	3/18/24	GOSS	Health	Drug	Pharmaceutical Preparations	Peterson Caryn	CA	O	EVP,Regu	S	-5	1.33	-4	-7	50	D
11/17/23 16:01	11/15/23	GOSS	Health	Drug	Pharmaceutical Preparations	Milligan Sandra	CA	D		P	25	0.7879	32	New	32	I
11/14/23 18:24	11/13/23	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	P	113	0.5644	200	72	479	I
6/26/23 16:01	6/22/23	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-2	1.29	-2	-1	200	D
4/5/23 16:26	4/4/23	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	P	56	1.02	55	32	225	I
3/22/23 17:19	3/20/23	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,Tech	P.d	22	1.20	19	3	637	I
3/22/23 17:17	3/20/23	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	P.d	48	0.9687	50	42	170	I
3/22/23 17:14	3/20/23	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	DO	P,CEO	P.dm	1,000	1.14	879	23	4,639	I
3/20/23 09:22	3/16/23	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-7	1.10	-6	-7	76	D
3/20/23 09:21	3/16/23	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-8	1.10	-8	-4	202	D
3/20/23 09:19	3/16/23	GOSS	Health	Drug	Pharmaceutical Preparations	Peterson Caryn	CA	O	EVP,Regu	S	-8	1.10	-8	-12	54	D
10/27/22 17:04	10/24/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S.a	-59	12.07	-5	-6	82	D
10/25/22 16:59	10/24/22	GOSS	Health	Drug	Pharmaceutical Preparations	Peterson Caryn	CA	O	EVP,Regu	S	-57	12.07	-5	-7	61	D
10/25/22 16:57	10/24/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-59	12.07	-5	-6	82	D
10/25/22 16:55	10/24/22	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-57	12.07	-5	-2	208	D
7/15/22 16:27	7/15/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	P	50	7.21	7	9	87	D
7/15/22 16:25	7/15/22	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,Tech	P	50	7.21	7	1	615	I
7/15/22 16:23	7/15/22	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	P	100	7.21	14	13	120	I
7/15/22 16:21	7/15/22	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	DO	P,CEO	P	1,000	7.21	139	4	3,761	I
7/5/22 16:39	7/1/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-73	8.25	-9	-10	80	D
6/23/22 18:47	6/22/22	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-12	6.88	-2	-1	212	D
5/5/22 18:14	5/4/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-9	7.20	-1	-1	89	D
3/24/22 16:57	3/23/22	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,Tech	S	-96	8.92	-11	-2	608	D
3/24/22 16:55	3/23/22	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	DO	P,CEO	S	-170	8.92	-19	-1	3,622	D
3/24/22 16:53	3/23/22	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	COO,CFO	S	-96	8.92	-11	-9	106	D
3/17/22 17:03	3/16/22	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-41	8.28	-5	-5	90	D
3/17/22 17:00	3/16/22	GOSS	Health	Drug	Pharmaceutical Preparations	Peterson Caryn	CA	O	EVP,Regu	S	-52	8.28	-6	-9	66	D
3/17/22 16:58	3/16/22	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-52	8.28	-6	-3	214	D
10/26/21 17:08	10/25/21	GOSS	Health	Drug	Pharmaceutical Preparations	Peterson Caryn	CA	O	EVP,Regu	S	-29	12.25	-2	-3	72	D
10/26/21 17:01	10/25/21	GOSS	Health	Drug	Pharmaceutical Preparations	Carter Laura	CA	O	Chief Sc	S	-29	12.25	-2	-2	95	D
10/26/21 16:58	10/25/21	GOSS	Health	Drug	Pharmaceutical Preparations	Aranda Richard	CA	O	Chief Me	S	-29	12.25	-2	-1	220	D
3/25/21 16:13	3/23/21	GOSS	Health	Drug	Pharmaceutical Preparations	Salter-Cid Luisa	CA	O	Chief Sc	S	-52	9.48	-5	-3	206	D
3/25/21 16:11	3/23/21	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	S	-52	9.48	-5	-4	117	D
10/14/20 19:29	10/14/20	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,GC	P	24	9.53	3	0	577	I
10/14/20 19:28	10/14/20	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	D		P	1,000	10.36	97	3	3,479	I
10/14/20 19:27	10/14/20	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	P	30	10.01	3	4	78	I
6/23/20 17:01	6/23/20	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	P	26	12.96	2	3	75	I
12/31/19 17:00	12/27/19	GOSS	Health	Drug	Pharmaceutical Preparations	Dupont Jakob	CA	O	Chief Me	M.dm	450	10.71	42		0	D
12/31/19 17:00	12/27/19	GOSS	Health	Drug	Pharmaceutical Preparations	Dupont Jakob	CA	O	Chief Me	S.dm	-632	15.04	-42	-100	0	D
9/27/19 10:46	9/27/19	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,GC	P	17	16.65	1	0	528	I
9/27/19 10:41	9/27/19	GOSS	Health	Drug	Pharmaceutical Preparations	Hasnain Faheem	CA	D		P	168	16.80	10	0	3,382	I
9/27/19 10:39	9/27/19	GOSS	Health	Drug	Pharmaceutical Preparations	Gujrathi Sheila	CA	DO	P,CEO	P	168	16.80	10	0	4,048	I
9/26/19 16:08	9/26/19	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	P	19	16.78	1	5	26	I
9/23/19 15:51	9/20/19	GOSS	Health	Drug	Pharmaceutical Preparations	Omega Fund V, L.P.	MA	T		S	-4,033	21.96	-184	-3	6,553	D
9/18/19 18:28	9/16/19	GOSS	Health	Drug	Pharmaceutical Preparations	Omega Fund V, L.P.	MA	T		S.m	-1,788	21.75	-82	-1	6,737	D
9/12/19 19:41	9/10/19	GOSS	Health	Drug	Pharmaceutical Preparations	Omega Fund V, L.P.	MA	T		S.m	-2,393	21.22	-113	-2	6,819	D
9/9/19 17:37	9/5/19	GOSS	Health	Drug	Pharmaceutical Preparations	Omega Fund V, L.P.	MA	T		S.m	-462	21.56	-21	0	6,932	D
8/29/19 18:26	8/28/19	GOSS	Health	Drug	Pharmaceutical Preparations	Salter-Cid Luisa	CA	O	Chief Sc	S.m	-994	19.88	-50	-29	124	D
6/3/19 16:03	5/30/19	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	P	19	18.70	1	4	25	I
2/12/19 17:40	2/12/19	GOSS	Health	Drug	Pharmaceutical Preparations	Cox Russell J.	CA	D		P	115	16.00	7	New	7	D
2/12/19 17:36	2/12/19	GOSS	Health	Drug	Pharmaceutical Preparations	Christian Waage	CA	O	EVP,GC	P.d	25	16.00	2	0	527	M
2/12/19 17:33	2/12/19	GOSS	Health	Drug	Pharmaceutical Preparations	Giraudo Bryan	CA	O	CFO	P.d	96	16.00	6	34	24	D

D	Derivative transaction in filing (usually option exercise)
M	Multiple transactions in filing; earliest reported transaction date and weighted average transaction price
A	Amended filing
E	Error detected in filing

S - Sale	Sale of securities on an exchange or to another person
S - Sale+OE	Sale of securities on an exchange or to another person (after option exercise)
F - Tax	Payment of exercise price or tax liability using portion of securities received from the company
P - Purchase	Purchase of securities on an exchange or from another person

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