Gossamer Bio, Inc GOSS

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Gossamer Bio, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 0.1360 · FX 1 USD = 1.288650 SGD · about SGD 0.1753 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 1.98 → 0.14 · -93.1%
3.7901.9630.136 1,2 3 4,5 6 7 8,9 10 11,12 13 14,15,16 17 18,19 20 21 22 23 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
0.1450 0.1450 0.1320 0.1360 10,645,100
0.1430 0.1430 0.1360 0.1430 14,004,100
0.1420 0.1550 0.1370 0.1450 16,477,100
0.1440 0.1550 0.1420 0.1550 15,126,500
0.1700 0.1700 0.1390 0.1410 39,485,300
Weekend
Weekend
0.1660 0.1770 0.1600 0.1700 11,563,900
0.1600 0.1710 0.1430 0.1710 14,222,500
0.1330 0.1710 0.1270 0.1620 24,628,500
23 · 8-K Next filing day · accepted 14 Jul, 20:39 ET 8-K ↗
0.1440 0.1440 0.1140 0.1400 41,841,700
0.1700 0.1700 0.1400 0.1440 30,798,200
Weekend
Weekend
0.1750 0.1750 0.1600 0.1700 12,927,900
0.1720 0.1800 0.1690 0.1750 8,708,900
0.1750 0.1770 0.1660 0.1690 17,800,300
0.1910 0.2000 0.1760 0.1780 14,282,600
0.1730 0.1950 0.1660 0.1950 16,580,500
Weekend
Weekend
No trading
0.1690 0.1780 0.1640 0.1730 16,490,100
0.1670 0.1700 0.1630 0.1680 11,741,600
22 · 8-K Pre-market · 09:01 ET 8-K ↗
0.1710 0.1740 0.1620 0.1650 10,802,500
0.1620 0.1700 0.1530 0.1640 15,675,000
Weekend
Weekend
0.1680 0.1710 0.1510 0.1570 38,552,900
0.1700 0.1780 0.1610 0.1650 11,359,800
0.1710 0.1810 0.1680 0.1690 12,287,500
0.1610 0.1790 0.1560 0.1710 13,387,500
0.1760 0.1760 0.1600 0.1640 11,641,500
Weekend
Weekend
No trading
0.1950 0.2000 0.1600 0.1680 23,415,700
0.1600 0.1850 0.1550 0.1790 23,153,100
21 · 8-K Pre-market · 08:01 ET 8-K ↗
0.1680 0.1730 0.1660 0.1680 8,744,500
0.1700 0.1800 0.1660 0.1670 16,232,300
Weekend
Weekend
0.1790 0.1840 0.1600 0.1620 17,990,600
0.1590 0.1800 0.1540 0.1770 22,657,800
0.1570 0.1660 0.1400 0.1560 34,015,800
20 · DEF 14A After-hours · 16:18 ET DEF 14A ↗
0.1690 0.1690 0.1530 0.1600 13,174,800
0.1790 0.1790 0.1640 0.1660 14,269,400
Weekend
Weekend
0.1800 0.1800 0.1680 0.1750 13,195,800
19 · 8-K Next filing day · accepted 04 Jun, 19:28 ET 8-K ↗ 18 · 8-K Next filing day · accepted 04 Jun, 17:34 ET 8-K ↗
0.1860 0.1910 0.1760 0.1780 9,006,400
0.1990 0.2000 0.1830 0.1880 12,271,200
0.2020 0.2020 0.1950 0.2000 11,592,100
17 · 8-K Pre-market · 08:00 ET 8-K ↗
0.2320 0.2350 0.1980 0.1980 19,804,300
Weekend
Weekend
0.2120 0.2310 0.2030 0.2310 13,216,400
0.2110 0.2130 0.2020 0.2110 11,699,700
0.2280 0.2280 0.1980 0.2180 16,239,800
0.2190 0.2390 0.2110 0.2200 13,230,300
No trading
Weekend
Weekend
0.2000 0.2120 0.1960 0.2100 12,800,500
0.2400 0.2400 0.1900 0.2010 36,709,800
0.2000 0.2200 0.1950 0.2150 15,581,000
0.2000 0.2190 0.1950 0.1990 26,042,800
0.3000 0.3000 0.1630 0.1930 58,014,600
16 · PRE 14A Pre-market · 07:08 ET PRE 14A ↗ 15 · DEFA14A Pre-market · 07:07 ET DEFA14A ↗ 14 · 8-K Pre-market · 07:06 ET 8-K ↗
Weekend
Weekend
13 · 10-Q After-hours · 16:01 ET 10-Q ↗
0.3300 0.3400 0.3160 0.3400 5,500,900
0.3550 0.3550 0.3300 0.3300 2,707,300
0.3410 0.3550 0.3300 0.3440 3,320,900
0.3220 0.3450 0.3200 0.3410 2,684,600
0.3250 0.3390 0.3140 0.3390 3,055,600
Weekend
Weekend
0.3400 0.3490 0.3250 0.3270 3,392,900
0.3500 0.3530 0.3290 0.3440 3,894,600
0.3450 0.3600 0.3330 0.3500 4,552,100
0.3540 0.3640 0.3300 0.3360 4,346,600
0.3700 0.3800 0.3460 0.3500 3,890,800
Weekend
Weekend
0.3600 0.3700 0.3500 0.3700 2,371,500
0.3500 0.3690 0.3380 0.3680 3,456,900
0.3450 0.3600 0.3310 0.3500 5,127,900
0.3480 0.3500 0.3270 0.3450 7,900,200
0.3640 0.3800 0.3400 0.3490 6,299,100
Weekend
Weekend
12 · DEFA14A After-hours · 16:02 ET DEFA14A ↗ 11 · DEF 14A After-hours · 16:01 ET DEF 14A ↗
0.3720 0.3770 0.3610 0.3630 3,262,500
0.3920 0.3920 0.3600 0.3740 4,196,400
0.3700 0.3930 0.3700 0.3900 4,799,100
0.4180 0.4180 0.3640 0.3770 9,344,800
0.4390 0.4600 0.4140 0.4200 4,577,100
Weekend
Weekend
0.4400 0.4670 0.4340 0.4460 4,082,800
0.4500 0.4600 0.4230 0.4370 5,149,400
0.4290 0.4680 0.4240 0.4510 8,782,800
0.4020 0.4320 0.4020 0.4320 6,939,300
0.3980 0.4100 0.3810 0.4010 6,837,700
Weekend
Weekend
0.3660 0.4290 0.3660 0.4100 11,775,600
10 · 8-K After-hours · 16:01 ET 8-K ↗
0.3470 0.3780 0.3380 0.3720 7,970,700
0.3450 0.3490 0.3220 0.3470 6,916,400
0.3480 0.3500 0.3200 0.3300 8,481,700
0.3790 0.3800 0.3340 0.3460 9,805,200
Weekend
Weekend
No trading
0.3480 0.3810 0.3440 0.3700 5,810,700
0.3370 0.3780 0.3330 0.3650 10,666,100
0.3230 0.3380 0.3200 0.3290 7,205,600
0.3410 0.3500 0.3200 0.3200 7,585,600
Weekend
Weekend
0.3600 0.3800 0.3440 0.3470 9,487,100
0.3740 0.4110 0.3640 0.3750 9,464,500
0.3540 0.3970 0.3500 0.3820 15,000,600
0.3780 0.3800 0.3210 0.3450 23,456,400
0.4000 0.4090 0.3640 0.3730 28,704,200
Weekend
Weekend
0.4500 0.4500 0.4000 0.4220 29,612,200
0.4240 0.4700 0.4050 0.4520 10,720,800
0.4580 0.4700 0.4240 0.4340 10,906,000
9 · 8-K After-hours · 16:04 ET 8-K ↗ 8 · 10-K After-hours · 16:03 ET 10-K ↗
0.4540 0.4850 0.4510 0.4720 6,383,600
0.4480 0.4800 0.4430 0.4560 6,188,900
Weekend
Weekend
0.4660 0.4820 0.4360 0.4370 5,999,900
0.4800 0.4900 0.4520 0.4600 10,443,300
0.5100 0.5200 0.4900 0.4900 8,137,700
0.5600 0.5690 0.4980 0.5070 9,538,700
0.4990 0.5650 0.4830 0.5550 9,228,100
Weekend
Weekend
0.5130 0.5290 0.4850 0.5010 12,042,500
0.5700 0.5700 0.4760 0.5220 21,213,500
0.4730 0.5980 0.4650 0.5800 25,324,700
0.4200 0.5010 0.4120 0.4700 20,495,400
0.4070 0.4450 0.3920 0.4290 14,396,000
Weekend
Weekend
0.3900 0.4450 0.3900 0.4250 27,492,100
0.3710 0.4180 0.3630 0.4020 34,536,400
0.4010 0.4010 0.3310 0.3800 73,681,500
0.3880 0.4450 0.3560 0.4150 71,290,800
0.5960 0.6000 0.3320 0.4230 273,892,300
7 · 8-K Pre-market · 08:30 ET 8-K ↗
Weekend
Weekend
2.1000 2.2200 2.0600 2.1300 8,452,400
2.1800 2.2260 2.1000 2.1100 5,210,400
2.1600 2.2350 2.1100 2.1700 5,776,300
2.3000 2.3400 2.1400 2.1500 6,206,900
No trading
Weekend
Weekend
2.3400 2.4950 2.2800 2.2900 5,145,800
2.3600 2.3800 2.2700 2.3200 3,220,000
2.3300 2.3800 2.2400 2.3500 5,451,900
2.2800 2.4100 2.2600 2.3300 6,553,000
2.2700 2.3600 2.1600 2.2600 5,801,000
Weekend
Weekend
2.4750 2.5000 2.2300 2.2600 7,931,800
2.4400 2.5400 2.4000 2.4350 5,109,300
2.6600 2.6600 2.3200 2.4600 6,850,700
2.4800 2.7550 2.3820 2.6700 7,079,500
2.3000 2.6300 2.2650 2.4800 8,764,600
Weekend
Weekend
2.4300 2.4700 2.2700 2.2800 4,638,100
2.5700 2.5700 2.4000 2.4200 4,829,000
6 · S-3ASR After-hours · 16:01 ET S-3ASR ↗
2.6900 2.7200 2.5000 2.5500 5,838,300
2.6600 2.6750 2.4900 2.6400 3,584,400
2.7400 2.7790 2.6350 2.6600 2,805,100
Weekend
Weekend
2.9000 2.9200 2.6700 2.7000 4,250,700
2.7900 2.9990 2.7500 2.8700 7,513,900
2.6000 2.7550 2.5600 2.7400 6,338,800
2.4300 2.6300 2.3800 2.6000 3,948,600
No trading
Weekend
Weekend
2.4800 2.6400 2.4500 2.5200 3,874,200
2.5400 2.5800 2.4400 2.4500 2,717,200
2.6300 2.6500 2.4800 2.5500 3,508,900
2.5200 2.6900 2.4200 2.6600 5,049,100
2.5200 2.6500 2.4900 2.5200 4,221,700
Weekend
Weekend
2.5400 2.6100 2.4100 2.5000 3,403,200
2.3500 2.5400 2.3500 2.5000 7,132,800
2.5500 2.6500 2.3600 2.4100 6,886,300
2.7100 2.7600 2.5200 2.5600 5,604,400
2.9100 2.9700 2.7250 2.7400 4,470,100
Weekend
Weekend
3.1500 3.1500 2.8500 2.8800 3,855,200
No trading
3.1200 3.2100 3.0750 3.1000 3,446,100
3.2100 3.2600 3.0400 3.1200 4,106,000
3.2500 3.3500 3.2100 3.2100 4,114,200
Weekend
Weekend
3.4100 3.4600 3.1400 3.2300 4,371,100
No trading
3.2700 3.6500 3.2700 3.4400 3,250,000
3.7500 3.7700 3.2100 3.2850 5,665,700
3.4800 3.7700 3.4300 3.7700 4,263,200
Weekend
Weekend
3.4100 3.6000 3.3700 3.4400 15,018,800
3.5700 3.6100 3.4000 3.4300 4,536,800
3.6400 3.8200 3.4950 3.5700 3,704,600
3.8000 3.8650 3.5350 3.5600 4,856,700
3.7000 3.8700 3.5250 3.7900 8,630,500
Weekend
Weekend
3.7200 3.7900 3.5600 3.6000 3,479,500
3.5000 3.8000 3.4700 3.6200 4,286,600
3.4850 3.5280 3.3400 3.4900 3,054,000
3.4500 3.5400 3.4300 3.4500 1,647,500
3.3500 3.4600 3.3500 3.4100 1,842,100
Weekend
Weekend
3.3500 3.4000 3.2450 3.3300 2,223,500
3.4100 3.4300 3.3000 3.3200 2,191,700
3.0400 3.4500 3.0100 3.4200 4,711,500
3.1400 3.1500 2.9750 2.9900 3,665,600
3.2700 3.3050 3.1050 3.1400 3,601,200
Weekend
Weekend
3.3250 3.4000 3.2500 3.3400 1,137,300
No trading
3.3100 3.3700 3.2200 3.3400 1,718,500
3.2400 3.3350 3.1900 3.2700 2,389,600
3.0800 3.2300 2.9950 3.1800 2,735,000
Weekend
Weekend
3.1100 3.1700 2.9300 3.0600 2,742,500
3.2200 3.2750 3.0500 3.1100 2,952,000
3.0600 3.1950 3.0200 3.1400 3,058,700
2.9800 3.1000 2.9210 3.0500 2,897,700
2.7100 3.0600 2.6540 2.9900 6,266,500
Weekend
Weekend
2.4200 2.7700 2.4200 2.7100 2,785,200
2.6500 2.6620 2.5000 2.5100 2,324,400
2.6300 2.7100 2.5350 2.7000 3,419,300
2.4900 2.5950 2.4600 2.5900 2,299,900
2.4500 2.6200 2.4400 2.4800 4,072,700
Weekend
Weekend
2.3000 2.4100 2.2050 2.3600 2,091,500
2.2820 2.4100 2.2800 2.3100 2,346,800
5 · 8-K After-hours · 17:23 ET 8-K ↗ 4 · 10-Q After-hours · 17:23 ET 10-Q ↗
2.2900 2.3750 2.2000 2.3700 2,292,300
2.3500 2.3700 2.2800 2.3000 1,937,200
2.4900 2.4900 2.3500 2.3900 2,493,800
Weekend
Weekend
2.4300 2.5200 2.3800 2.4500 2,163,300
2.4000 2.4900 2.3600 2.4200 2,166,400
2.3800 2.4650 2.3300 2.3900 2,353,200
2.3700 2.4000 2.2810 2.3800 1,558,700
2.4800 2.5300 2.3400 2.3900 3,831,100
Weekend
Weekend
2.1500 2.4850 2.1300 2.4800 7,741,800
2.2300 2.2400 2.0800 2.0900 2,981,800
2.1500 2.2200 2.1200 2.2100 2,574,000
2.2700 2.2750 2.1500 2.1800 4,084,400
2.2300 2.3100 2.1850 2.2700 2,302,400
Weekend
Weekend
2.2900 2.3000 2.1800 2.1900 2,998,200
2.4400 2.4500 2.2300 2.3100 2,828,100
2.3900 2.4500 2.3600 2.4100 2,380,800
2.4000 2.4200 2.3100 2.3800 2,259,600
2.3500 2.4400 2.2900 2.4400 3,016,800
Weekend
Weekend
2.5500 2.5750 2.2100 2.2800 4,325,600
2.4500 2.6100 2.4500 2.5600 3,038,400
2.5300 2.5500 2.4140 2.4200 2,808,500
2.4000 2.5450 2.4000 2.5000 2,640,700
2.5700 2.5890 2.3200 2.4100 4,064,400
Weekend
Weekend
2.5100 2.6350 2.5100 2.5700 2,797,500
2.5000 2.5500 2.3800 2.4800 4,192,500
2.5900 2.7000 2.4600 2.4900 4,410,100
2.8400 2.8400 2.5700 2.6300 4,702,200
2.7300 2.8250 2.6400 2.8200 2,766,600
Weekend
Weekend
2.7800 2.8300 2.6250 2.7000 3,931,500
2.8400 2.8750 2.7310 2.7800 8,591,900
3 · 8-K Pre-market · 08:50 ET 8-K ↗
3.0900 3.1750 2.9750 2.9900 3,112,300
3.1700 3.1700 2.9800 3.0800 2,711,500
3.0400 3.2100 3.0050 3.1600 4,354,200
Weekend
Weekend
3.1300 3.1800 2.9400 3.0500 5,112,800
3.0400 3.1500 3.0150 3.0800 3,632,300
3.3680 3.3680 2.9300 2.9900 4,804,900
3.2000 3.2900 3.0600 3.2000 3,468,100
3.4900 3.5500 3.1650 3.1800 4,135,200
Weekend
Weekend
3.4800 3.6000 3.3590 3.4600 4,242,200
3.1800 3.5000 3.1400 3.4600 7,309,700
2.9900 3.4000 2.9400 3.1100 11,229,900
2.6250 2.8150 2.6100 2.7700 2,715,100
2.9700 3.0000 2.6310 2.6600 5,557,400
Weekend
Weekend
2.5100 2.9800 2.5100 2.9400 7,657,000
2.5600 2.6700 2.4100 2.5100 3,365,600
2.5700 2.7050 2.5500 2.5800 3,305,000
2.4200 2.6800 2.4200 2.5900 7,656,400
No trading
Weekend
Weekend
2.4100 2.5000 2.3750 2.4700 2,537,700
2.4700 2.5850 2.3800 2.4000 4,268,400
2.5300 2.6450 2.4500 2.4600 4,258,700
2.3800 2.5700 2.3750 2.5300 3,556,200
2.3400 2.4400 2.2700 2.3600 3,156,200
Weekend
Weekend
2.1700 2.3500 2.1450 2.3400 4,899,200
2.0100 2.1800 1.9900 2.1700 4,527,900
1.9000 1.9750 1.8800 1.9500 1,112,100
1.9700 2.0000 1.9100 1.9200 1,185,400
1.9350 2.0300 1.9200 1.9900 1,533,300
Weekend
Weekend
1.9600 1.9800 1.9100 1.9600 1,731,000
1.9500 1.9800 1.8600 1.9600 1,413,100
1.9500 2.0000 1.8450 1.9700 2,942,700
1.7700 1.9500 1.7450 1.9300 2,208,300
1.7300 1.7950 1.6800 1.7350 2,488,000
Weekend
Weekend
1.7500 1.7900 1.6650 1.7600 3,070,000
2.0000 2.0200 1.7150 1.7400 3,782,300
2.1800 2.2100 1.9200 1.9800 3,966,400
2 · 8-K After-hours · 16:02 ET 8-K ↗ 1 · 10-Q After-hours · 16:02 ET 10-Q ↗
2.1750 2.2300 2.0610 2.1600 3,076,000
2.0850 2.1800 2.0300 2.1700 5,912,500
Weekend
Weekend
2.0000 2.0350 1.9100 2.0000 2,686,100
2.1700 2.1800 2.0030 2.0400 2,993,700
2.0550 2.1700 2.0300 2.0800 3,907,000
2.0400 2.1800 1.9000 1.9600 4,161,000
1.8700 2.0300 1.8400 1.9800 3,564,900
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

23 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 14 Jul, 20:39 ET Summarise
22 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:01 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:01 ET Summarise
20 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:18 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 04 Jun, 19:28 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 04 Jun, 17:34 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:00 ET Summarise
16 PRE 14A PRE 14A (opens SEC filing in a new tab) Pre-market · 07:08 ET Summarise
15 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 07:07 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
13 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
12 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise
11 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:04 ET Summarise
8 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:30 ET Summarise
6 S-3ASR S-3ASR (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:23 ET Summarise
4 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:23 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:50 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise
1 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise