Gossamer Bio GOSS SEC Filings

NASDAQ GOSS
$11.28 +0.63 (+5.92%)
At close: Nov 10, 2026 · 4:00 PM EST
EDGAR Disclosures

SEC Filings

Source SEC EDGAR

Every SEC filing Gossamer Bio, Inc. (GOSS) has made, as reported on EDGAR — annual and quarterly reports, current reports, insider transactions and ownership disclosures. Filter by form group, form type or period, and open any filing or its index directly.

Form Type
# Form Type Form Group Accession Date Filing Index
18-KCurrent Report0001728117-26-000116Nov 10, 2026 4:50 PM
210-QQuarterly & Annual Report0001728117-26-000114Nov 10, 2026 4:49 PM
3SCHEDULE 13GBeneficial Ownership Report0001493152-26-050449Nov 6, 2026 9:05 PM
4SCHEDULE 13GBeneficial Ownership Report0000315066-26-002941Nov 6, 2026 2:45 PM
5SCHEDULE 13DBeneficial Ownership Report0001104659-26-120319Oct 29, 2026 11:47 PM
68-KCurrent Report0001728117-26-000109Oct 28, 2026 8:02 PM
7SCHEDULE 13DBeneficial Ownership Report0001104659-26-114792Oct 8, 2026 4:59 AM
8SCHEDULE 13DBeneficial Ownership Report0001104659-26-111463Sep 28, 2026 11:49 PM
98-KCurrent Report0001728117-26-000106Sep 28, 2026 8:01 PM
104Insider Transaction0001628280-26-063624Sep 25, 2026 9:17 PM
114Insider Transaction0001628280-26-063619Sep 25, 2026 9:04 PM
124Insider Transaction0001628280-26-063616Sep 25, 2026 9:01 PM
134Insider Transaction0001628280-26-063610Sep 25, 2026 8:55 PM
144Insider Transaction0001628280-26-063606Sep 25, 2026 8:51 PM
154Insider Transaction0001628280-26-063601Sep 25, 2026 8:43 PM
164Insider Transaction0001628280-26-063593Sep 25, 2026 8:36 PM
178-KCurrent Report0001728117-26-000104Sep 23, 2026 8:05 PM
183Insider Transaction0001628280-26-063097Sep 22, 2026 10:27 PM
19DEF 14AOthers0001728117-26-000102Sep 16, 2026 4:30 PM
208-KCurrent Report0001728117-26-000101Sep 16, 2026 4:05 PM
218-KCurrent Report0001728117-26-000094Sep 11, 2026 12:01 PM
228-KCurrent Report0001728117-26-000091Sep 9, 2026 1:00 PM
23DOthers0001728117-26-000088Sep 4, 2026 8:50 PM
24PRE 14AOthers0001728117-26-000086Sep 3, 2026 8:03 PM
258-KCurrent Report0001728117-26-000085Sep 3, 2026 8:02 PM
264Insider Transaction0001553179-26-000005Aug 26, 2026 10:13 PM
274Insider Transaction0001857256-26-000006Aug 26, 2026 10:12 PM
284Insider Transaction0002003059-26-000008Aug 26, 2026 10:11 PM
294Insider Transaction0001740847-26-000006Aug 26, 2026 10:10 PM
304Insider Transaction0001352620-26-000006Aug 26, 2026 10:08 PM
318-KCurrent Report0001728117-26-000079Aug 26, 2026 8:01 PM
32SCHEDULE 13DBeneficial Ownership Report0001104659-26-100440Aug 24, 2026 12:11 AM
338-KCurrent Report0001728117-26-000077Aug 21, 2026 12:01 PM
348-KCurrent Report0001728117-26-000073Aug 13, 2026 8:02 PM
3510-QQuarterly & Annual Report0001728117-26-000072Aug 13, 2026 8:01 PM
36SCHEDULE 13GBeneficial Ownership Report0001493152-26-035186Jul 29, 2026 8:05 PM
37SCHEDULE 13GBeneficial Ownership Report0002012383-26-002802Jul 29, 2026 7:19 PM
388-KCurrent Report0001728117-26-000064Jul 27, 2026 8:01 PM
39SCHEDULE 13DBeneficial Ownership Report0001104659-26-086735Jul 24, 2026 1:14 AM
408-KCurrent Report0001728117-26-000061Jul 15, 2026 12:39 AM
41SCHEDULE 13DBeneficial Ownership Report0001104659-26-080004Jul 1, 2026 1:23 AM
428-KCurrent Report0001728117-26-000057Jul 1, 2026 1:01 PM
438-KCurrent Report0001728117-26-000054Jun 17, 2026 12:01 PM
44SCHEDULE 13DBeneficial Ownership Report0001104659-26-073089Jun 11, 2026 1:13 AM
45SCHEDULE 13GBeneficial Ownership Report0001104659-26-073064Jun 11, 2026 12:10 AM
46SCHEDULE 13GBeneficial Ownership Report0001404574-26-000021Jun 11, 2026 8:54 PM
47DEF 14AOthers0001728117-26-000052Jun 9, 2026 8:18 PM
48SCHEDULE 13GBeneficial Ownership Report0001301396-26-000003Jun 9, 2026 12:44 PM
494Insider Transaction0001728117-26-000047Jun 5, 2026 9:45 PM
504Insider Transaction0002015102-26-000001Jun 5, 2026 8:30 PM
...

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