Gossamer Bio GOSS SEC Filings

NASDAQ GOSS
$9.79 +0.21 (+2.19%)
At close: Oct 21, 2026 · 4:00 PM EDT
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 Report0001728117-26-000106Sep 28, 2026 8:01 PM
24Insider Transaction0001628280-26-063624Sep 25, 2026 9:17 PM
34Insider Transaction0001628280-26-063619Sep 25, 2026 9:04 PM
44Insider Transaction0001628280-26-063616Sep 25, 2026 9:01 PM
54Insider Transaction0001628280-26-063610Sep 25, 2026 8:55 PM
64Insider Transaction0001628280-26-063606Sep 25, 2026 8:51 PM
74Insider Transaction0001628280-26-063601Sep 25, 2026 8:43 PM
84Insider Transaction0001628280-26-063593Sep 25, 2026 8:36 PM
98-KCurrent Report0001728117-26-000104Sep 23, 2026 4:05 PM
103Insider Transaction0001628280-26-063097Sep 22, 2026 10:27 PM
11DEF 14AOthers0001728117-26-000102Sep 16, 2026 4:30 PM
128-KCurrent Report0001728117-26-000101Sep 16, 2026 4:05 PM
138-KCurrent Report0001728117-26-000094Sep 11, 2026 8:01 AM
148-KCurrent Report0001728117-26-000091Sep 9, 2026 1:00 PM
15DOthers0001728117-26-000088Sep 4, 2026 8:50 PM
16PRE 14AOthers0001728117-26-000086Sep 3, 2026 8:03 PM
178-KCurrent Report0001728117-26-000085Sep 3, 2026 8:02 PM
184Insider Transaction0001553179-26-000005Aug 26, 2026 10:13 PM
194Insider Transaction0001857256-26-000006Aug 26, 2026 10:12 PM
204Insider Transaction0002003059-26-000008Aug 26, 2026 10:11 PM
214Insider Transaction0001740847-26-000006Aug 26, 2026 10:10 PM
224Insider Transaction0001352620-26-000006Aug 26, 2026 10:08 PM
238-KCurrent Report0001728117-26-000079Aug 26, 2026 8:01 PM
24SCHEDULE 13DBeneficial Ownership Report0001104659-26-100440Aug 24, 2026 12:11 AM
258-KCurrent Report0001728117-26-000077Aug 21, 2026 12:01 PM
268-KCurrent Report0001728117-26-000073Aug 13, 2026 4:02 PM
2710-QQuarterly & Annual Report0001728117-26-000072Aug 13, 2026 4:01 PM
28SCHEDULE 13GBeneficial Ownership Report0001493152-26-035186Jul 29, 2026 4:05 PM
29SCHEDULE 13GBeneficial Ownership Report0002012383-26-002802Jul 29, 2026 3:19 PM
308-KCurrent Report0001728117-26-000064Jul 27, 2026 8:01 PM
31SCHEDULE 13DBeneficial Ownership Report0001104659-26-086735Jul 24, 2026 1:14 AM
328-KCurrent Report0001728117-26-000061Jul 15, 2026 8:39 PM
33SCHEDULE 13DBeneficial Ownership Report0001104659-26-080004Jul 1, 2026 1:23 AM
348-KCurrent Report0001728117-26-000057Jul 1, 2026 1:01 PM
358-KCurrent Report0001728117-26-000054Jun 17, 2026 12:01 PM
36SCHEDULE 13DBeneficial Ownership Report0001104659-26-073089Jun 11, 2026 1:13 AM
37SCHEDULE 13GBeneficial Ownership Report0001104659-26-073064Jun 11, 2026 12:10 AM
38SCHEDULE 13GBeneficial Ownership Report0001404574-26-000021Jun 11, 2026 8:54 PM
39DEF 14AOthers0001728117-26-000052Jun 9, 2026 4:18 PM
40SCHEDULE 13GBeneficial Ownership Report0001301396-26-000003Jun 9, 2026 8:44 AM
414Insider Transaction0001728117-26-000047Jun 5, 2026 9:45 PM
424Insider Transaction0002015102-26-000001Jun 5, 2026 8:30 PM
434Insider Transaction0001538894-26-000002Jun 5, 2026 8:30 PM
444Insider Transaction0001512984-26-000001Jun 5, 2026 8:29 PM
454Insider Transaction0001859810-26-000003Jun 5, 2026 8:28 PM
464Insider Transaction0002015114-26-000001Jun 5, 2026 8:27 PM
478-KCurrent Report0001728117-26-000045Jun 5, 2026 11:28 PM
488-KCurrent Report0001728117-26-000042Jun 5, 2026 9:34 PM
498-KCurrent Report0001728117-26-000040Jun 2, 2026 12:00 PM
50PRE 14AOthers0001728117-26-000038May 18, 2026 7:08 AM
...

Gossamer Bio, Inc. SEC Filings API

Pull Gossamer Bio, Inc.'s SEC filing index, with links to every filing and exhibit, into your own tools with the Business Quant SEC Filings API. Swap YOUR_API_KEY for your own key.

https://data.businessquant.com/secfilings?ticker=GOSS&formtype=10-K,10-Q&api_key=YOUR_API_KEY