INSMED Inc (INSM) stock
INSMNasdaqPharmaceutical PreparationsFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Oct 29, 2026Score 8/3083% above fair value
$112.58+0.99 (+0.89%)
Close on Oct 30, 2026Market cap $24.59BP/E –Yield –
Price history
Insmed share prices for every month, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$112.58
+0.89% on the day
52-week range
$90.39 – $212.75
-47.1% from the high
Change over 52 weeks
-42.0%
From $194.22 on Oct 30, 2025
Average volume
2.84M
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $114.68 | $116.37 | $92.63 | $112.58 | -1.37% | 81,696,434 |
| Sep 2026 | $121.95 | $130.83 | $113.60 | $114.14 | -6.30% | 44,621,803 |
| Aug 2026 | $98.20 | $137.70 | $96.42 | $121.82 | +23.55% | 60,709,521 |
| Jul 2026 | $107.68 | $119.54 | $97.05 | $98.60 | -7.52% | 51,760,672 |
| Jun 2026 | $106.09 | $108.67 | $90.39 | $106.62 | -0.27% | 105,308,329 |
| May 2026 | $135.65 | $142.90 | $98.90 | $106.91 | -21.58% | 87,371,152 |
| Apr 2026 | $164.49 | $166.19 | $132.57 | $136.33 | -16.63% | 37,876,518 |
| Mar 2026 | $147.10 | $164.22 | $135.73 | $163.52 | +9.50% | 55,358,503 |
| Feb 2026 | $156.63 | $167.37 | $142.99 | $149.33 | -4.81% | 47,143,868 |
| Jan 2026 | $175.79 | $186.19 | $153.09 | $156.87 | -9.87% | 53,798,089 |
| Dec 2025 | $206.80 | $212.75 | $161.02 | $174.04 | -16.23% | 79,245,087 |
| Nov 2025 | $187.90 | $209.77 | $178.76 | $207.77 | +9.58% | 52,825,647 |
| Oct 2025 | $144.70 | $197.08 | $143.18 | $189.60 | +31.66% | 49,015,069 |
| Sep 2025 | $141.50 | $149.08 | $134.01 | $144.01 | +5.81% | 47,355,475 |
| Aug 2025 | $107.48 | $136.90 | $105.75 | $136.10 | +26.86% | 63,583,343 |
| Jul 2025 | $100.26 | $108.64 | $95.01 | $107.28 | +6.60% | 55,577,600 |
| Jun 2025 | $69.92 | $106.83 | $69.59 | $100.64 | +44.33% | 122,175,923 |
| May 2025 | $72.09 | $73.39 | $63.81 | $69.73 | -3.15% | 49,613,071 |
| Apr 2025 | $75.35 | $75.65 | $60.40 | $72.00 | -5.62% | 62,183,077 |
| Mar 2025 | $80.90 | $81.55 | $71.57 | $76.29 | -6.45% | 34,502,118 |
| Feb 2025 | $74.86 | $84.91 | $74.47 | $81.55 | +6.49% | 35,783,295 |
| Jan 2025 | $70.00 | $80.63 | $61.50 | $76.58 | +10.92% | 40,056,316 |
| Dec 2024 | $75.02 | $78.83 | $67.55 | $69.04 | -8.14% | 37,234,760 |
| Nov 2024 | $67.78 | $76.65 | $64.86 | $75.16 | +11.71% | 32,610,055 |
| Oct 2024 | $73.00 | $77.70 | $67.05 | $67.28 | -7.84% | 26,409,162 |
| Sep 2024 | $77.55 | $78.10 | $70.00 | $73.00 | -4.54% | 37,558,043 |
| Aug 2024 | $72.85 | $80.53 | $67.22 | $76.47 | +5.11% | 48,350,402 |
| Jul 2024 | $66.45 | $78.87 | $61.52 | $72.75 | +8.58% | 51,803,828 |
| Jun 2024 | $54.71 | $70.65 | $54.71 | $67.00 | +21.71% | 68,579,776 |
| May 2024 | $25.11 | $58.82 | $21.92 | $55.05 | +122.69% | 102,238,368 |
| Apr 2024 | $26.90 | $28.69 | $23.53 | $24.72 | -8.88% | 45,665,016 |
| Mar 2024 | $27.91 | $28.65 | $25.52 | $27.13 | -2.13% | 28,793,870 |
| Feb 2024 | $28.02 | $29.91 | $25.06 | $27.72 | -0.29% | 33,891,490 |
| Jan 2024 | $30.80 | $31.14 | $27.25 | $27.80 | -10.29% | 37,898,811 |
| Dec 2023 | $24.96 | $32.00 | $24.51 | $30.99 | +23.86% | 33,701,209 |
| Nov 2023 | $25.20 | $26.23 | $23.04 | $25.02 | -0.16% | 26,759,355 |
| Oct 2023 | $25.25 | $26.00 | $23.62 | $25.06 | -0.75% | 27,849,429 |
| Sep 2023 | $22.04 | $27.59 | $22.03 | $25.25 | +15.35% | 36,427,827 |
| Aug 2023 | $22.03 | $22.99 | $20.94 | $21.89 | -0.91% | 28,425,111 |
| Jul 2023 | $20.97 | $22.22 | $19.74 | $22.09 | +4.69% | 19,634,475 |
| Jun 2023 | $19.19 | $21.21 | $18.77 | $21.10 | +10.88% | 20,171,785 |
| May 2023 | $19.33 | $20.51 | $18.09 | $19.03 | -2.41% | 22,305,228 |
| Apr 2023 | $17.05 | $19.66 | $16.26 | $19.50 | +14.37% | 20,397,587 |
| Mar 2023 | $20.35 | $20.95 | $16.04 | $17.05 | -16.34% | 29,095,749 |
| Feb 2023 | $21.49 | $22.23 | $19.40 | $20.38 | -5.34% | 23,749,073 |
| Jan 2023 | $20.12 | $21.95 | $17.00 | $21.53 | +7.76% | 29,826,670 |
| Dec 2022 | $18.68 | $21.05 | $18.10 | $19.98 | +8.06% | 26,884,236 |
| Nov 2022 | $17.52 | $19.95 | $17.16 | $18.49 | +6.76% | 28,907,575 |
| Oct 2022 | $22.01 | $23.26 | $16.74 | $17.32 | -19.59% | 36,889,242 |
| Sep 2022 | $24.48 | $25.64 | $20.89 | $21.54 | -12.51% | 20,267,106 |
| Aug 2022 | $21.90 | $28.94 | $20.35 | $24.62 | +11.30% | 33,494,728 |
| Jul 2022 | $19.72 | $24.84 | $19.58 | $22.12 | +12.17% | 20,150,043 |
| Jun 2022 | $18.82 | $21.54 | $16.86 | $19.72 | +4.78% | 20,449,472 |
| May 2022 | $21.98 | $24.19 | $16.41 | $18.82 | -14.34% | 31,075,367 |
| Apr 2022 | $23.67 | $26.00 | $21.73 | $21.97 | -6.51% | 18,824,176 |
| Mar 2022 | $23.79 | $24.45 | $20.84 | $23.50 | -1.67% | 19,306,472 |
| Feb 2022 | $22.70 | $25.26 | $21.20 | $23.90 | +5.38% | 19,369,090 |
| Jan 2022 | $27.54 | $28.74 | $20.02 | $22.68 | -16.74% | 18,488,704 |
| Dec 2021 | $27.97 | $29.02 | $25.48 | $27.24 | -1.02% | 14,921,552 |
| Nov 2021 | $30.15 | $34.44 | $26.22 | $27.52 | -8.72% | 14,585,950 |
| Oct 2021 | $27.54 | $30.47 | $26.01 | $30.15 | +9.48% | 20,250,614 |
| Sep 2021 | $28.32 | $29.55 | $25.71 | $27.54 | -1.78% | 17,074,762 |
| Aug 2021 | $24.84 | $28.21 | $22.00 | $28.04 | +13.98% | 14,999,608 |
| Jul 2021 | $28.61 | $29.50 | $23.28 | $24.60 | -13.56% | 14,554,560 |
| Jun 2021 | $25.00 | $30.74 | $24.51 | $28.46 | +15.69% | 21,278,804 |
| May 2021 | $34.14 | $34.72 | $23.95 | $24.60 | -27.07% | 39,987,584 |
| Apr 2021 | $34.50 | $36.97 | $30.55 | $33.73 | -0.97% | 14,906,350 |
| Mar 2021 | $36.69 | $41.77 | $31.69 | $34.06 | -4.78% | 28,059,920 |
| Feb 2021 | $38.05 | $45.44 | $35.69 | $35.77 | -4.84% | 14,555,205 |
| Jan 2021 | $33.86 | $44.37 | $32.71 | $37.59 | +12.92% | 17,350,014 |
| Dec 2020 | $39.75 | $42.71 | $32.96 | $33.29 | -14.66% | 19,490,128 |
| Nov 2020 | $32.98 | $40.71 | $30.03 | $39.01 | +18.43% | 16,552,928 |
| Oct 2020 | $32.28 | $39.39 | $30.70 | $32.94 | +2.49% | 17,581,512 |
| Sep 2020 | $28.22 | $35.32 | $26.28 | $32.14 | +14.01% | 20,703,864 |
| Aug 2020 | $26.47 | $32.05 | $26.20 | $28.19 | +7.92% | 15,113,171 |
| Jul 2020 | $27.58 | $29.92 | $25.21 | $26.12 | -5.16% | 14,385,877 |
| Jun 2020 | $24.37 | $30.18 | $24.14 | $27.54 | +13.38% | 24,538,039 |
| May 2020 | $22.19 | $27.15 | $21.93 | $24.29 | +5.61% | 27,947,166 |
| Apr 2020 | $15.54 | $23.89 | $13.77 | $23.00 | +43.48% | 24,007,980 |
| Mar 2020 | $25.07 | $26.82 | $12.09 | $16.03 | -35.62% | 34,251,612 |
| Feb 2020 | $30.09 | $34.94 | $23.06 | $24.90 | +21.23% | 34,890,802 |
| Jan 2020 | $23.88 | $26.45 | $19.43 | $20.54 | -13.99% | 19,900,586 |
| Dec 2019 | $23.28 | $25.04 | $22.42 | $23.88 | +3.60% | 15,934,429 |
| Nov 2019 | $18.84 | $23.35 | $18.26 | $23.05 | +23.99% | 17,261,391 |
| Oct 2019 | $17.64 | $19.10 | $15.99 | $18.59 | +5.39% | 25,712,749 |
| Sep 2019 | $16.58 | $19.93 | $15.75 | $17.64 | +7.30% | 26,962,090 |
| Aug 2019 | $21.90 | $21.99 | $15.33 | $16.44 | -25.10% | 30,309,380 |
| Jul 2019 | $26.15 | $26.25 | $21.12 | $21.95 | -14.26% | 22,827,655 |
| Jun 2019 | $24.18 | $26.89 | $22.25 | $25.60 | +5.74% | 21,319,536 |
| May 2019 | $30.31 | $32.23 | $24.09 | $24.21 | -20.47% | 24,748,180 |
| Apr 2019 | $29.33 | $33.13 | $28.37 | $30.44 | +4.71% | 14,727,618 |
| Mar 2019 | $29.92 | $31.50 | $26.78 | $29.07 | -1.96% | 13,710,786 |
| Feb 2019 | $24.31 | $31.05 | $23.89 | $29.65 | +21.97% | 18,979,601 |
| Jan 2019 | $13.03 | $24.96 | $12.85 | $24.31 | +85.29% | 28,443,328 |
| Dec 2018 | $18.25 | $18.75 | $11.31 | $13.12 | -26.74% | 16,919,161 |
| Nov 2018 | $14.73 | $18.80 | $14.73 | $17.91 | +22.67% | 17,874,672 |
| Oct 2018 | $20.85 | $20.85 | $13.85 | $14.60 | -27.79% | 32,220,923 |
| Sep 2018 | $19.91 | $23.00 | $18.64 | $20.22 | +1.46% | 15,827,005 |
| Aug 2018 | $24.90 | $31.58 | $19.69 | $19.93 | -19.86% | 27,521,615 |
| Jul 2018 | $23.53 | $26.10 | $23.53 | $24.87 | +5.16% | 11,391,476 |
| Jun 2018 | $28.06 | $29.75 | $23.30 | $23.65 | -15.11% | 13,825,514 |
| May 2018 | $24.36 | $29.18 | $24.10 | $27.86 | +14.51% | 14,516,454 |
| Apr 2018 | $22.09 | $26.57 | $19.53 | $24.33 | +8.04% | 16,651,472 |
| Mar 2018 | $24.22 | $26.60 | $21.38 | $22.52 | -6.98% | 14,748,302 |
| Feb 2018 | $25.32 | $27.33 | $21.90 | $24.21 | -4.83% | 18,104,527 |
| Jan 2018 | $31.26 | $33.94 | $25.17 | $25.44 | -18.41% | 21,185,043 |
| Dec 2017 | $31.31 | $32.06 | $27.53 | $31.18 | -0.03% | 15,320,162 |
| Nov 2017 | $27.22 | $32.94 | $26.65 | $31.19 | +15.48% | 14,494,197 |
| Oct 2017 | $31.09 | $31.84 | $25.81 | $27.01 | -13.46% | 12,126,961 |
| Sep 2017 | $12.40 | $31.39 | $12.12 | $31.21 | +151.29% | 68,153,155 |
| Aug 2017 | $16.24 | $16.24 | $11.49 | $12.42 | -23.19% | 12,862,051 |
| Jul 2017 | $17.32 | $17.98 | $16.06 | $16.17 | -5.77% | 9,831,019 |
| Jun 2017 | $15.50 | $18.39 | $14.61 | $17.16 | +11.28% | 8,272,038 |
| May 2017 | $18.79 | $18.92 | $14.78 | $15.42 | -16.42% | 7,117,159 |
| Apr 2017 | $17.41 | $19.35 | $16.46 | $18.45 | +5.37% | 6,182,403 |
| Mar 2017 | $16.24 | $17.51 | $15.02 | $17.51 | +9.92% | 6,658,153 |
| Feb 2017 | $14.88 | $16.50 | $13.56 | $15.93 | +7.85% | 5,964,657 |
| Jan 2017 | $13.43 | $15.68 | $12.74 | $14.77 | +11.64% | 6,614,148 |
| Dec 2016 | $13.73 | $14.31 | $12.03 | $13.23 | -3.08% | 6,207,393 |
| Nov 2016 | $12.99 | $15.49 | $10.21 | $13.65 | +5.16% | 8,688,739 |
| Oct 2016 | $14.42 | $15.22 | $12.96 | $12.98 | -10.61% | 4,120,735 |
| Sep 2016 | $13.02 | $15.35 | $12.97 | $14.52 | +12.12% | 5,889,700 |
| Aug 2016 | $11.51 | $13.88 | $11.15 | $12.95 | +13.10% | 6,810,300 |
| Jul 2016 | $9.84 | $11.69 | $9.75 | $11.45 | +16.13% | 7,752,100 |
| Jun 2016 | $11.77 | $12.75 | $9.02 | $9.86 | -16.44% | 14,047,000 |
| May 2016 | $12.27 | $12.50 | $10.39 | $11.80 | -2.88% | 7,681,400 |
| Apr 2016 | $12.60 | $14.53 | $12.02 | $12.15 | -4.10% | 7,765,400 |
| Mar 2016 | $12.28 | $13.54 | $10.53 | $12.67 | +3.60% | 9,480,700 |
| Feb 2016 | $13.10 | $13.96 | $11.42 | $12.23 | -7.35% | 10,164,300 |
| Jan 2016 | $17.71 | $18.60 | $12.32 | $13.20 | -27.27% | 10,714,900 |
| Dec 2015 | $16.43 | $19.30 | $15.62 | $18.15 | +11.28% | 9,796,900 |
| Nov 2015 | $20.02 | $20.68 | $15.31 | $16.31 | -17.79% | 10,403,600 |
| Oct 2015 | $18.44 | $21.14 | $16.51 | $19.84 | +6.84% | 11,952,100 |
| Sep 2015 | $23.84 | $26.66 | $17.07 | $18.57 | -24.02% | 13,246,600 |
| Aug 2015 | $27.00 | $28.66 | $21.06 | $24.44 | -9.82% | 9,795,800 |
| Jul 2015 | $24.96 | $27.52 | $23.24 | $27.10 | +10.97% | 7,198,400 |
| Jun 2015 | $22.27 | $25.39 | $21.81 | $24.42 | +11.30% | 9,651,300 |
| May 2015 | $20.25 | $23.48 | $20.00 | $21.94 | +9.48% | 6,951,600 |
| Apr 2015 | $20.75 | $24.00 | $19.87 | $20.04 | -3.65% | 11,963,300 |
| Mar 2015 | $18.85 | $22.59 | $18.02 | $20.80 | +12.19% | 17,999,100 |
| Feb 2015 | $15.48 | $18.85 | $14.81 | $18.54 | +19.92% | 7,238,700 |
| Jan 2015 | $15.66 | $16.44 | $13.93 | $15.46 | -0.06% | 8,854,300 |
| Dec 2014 | $14.04 | $16.79 | $13.23 | $15.47 | +9.64% | 13,265,200 |
| Nov 2014 | $14.20 | $14.85 | $12.65 | $14.11 | -0.56% | 8,880,600 |
| Oct 2014 | $13.10 | $14.97 | $12.17 | $14.19 | +8.74% | 14,366,700 |
| Sep 2014 | $13.94 | $14.77 | $12.66 | $13.05 | -6.32% | 13,526,900 |
| Aug 2014 | $17.05 | $17.41 | $11.25 | $13.93 | -18.49% | 23,752,700 |
| Jul 2014 | $19.97 | $20.33 | $16.74 | $17.09 | -14.46% | 9,978,400 |
| Jun 2014 | $13.13 | $20.49 | $11.82 | $19.98 | +52.05% | 30,975,300 |
| May 2014 | $13.94 | $15.91 | $12.65 | $13.14 | -5.74% | 15,749,600 |
| Apr 2014 | $19.05 | $20.04 | $11.91 | $13.94 | -26.79% | 20,494,900 |
| Mar 2014 | $19.75 | $20.46 | $15.55 | $19.04 | -4.85% | 23,420,800 |
| Feb 2014 | $20.38 | $21.15 | $16.26 | $20.01 | -2.01% | 10,097,300 |
| Jan 2014 | $16.92 | $22.29 | $16.90 | $20.42 | +20.12% | 8,275,700 |
| Dec 2013 | $16.21 | $17.60 | $15.00 | $17.00 | +4.94% | 6,505,900 |
| Nov 2013 | $14.19 | $16.78 | $14.05 | $16.20 | +13.76% | 9,169,500 |
| Oct 2013 | $15.50 | $16.25 | $12.17 | $14.24 | -8.78% | 16,246,200 |
| Sep 2013 | $15.28 | $16.50 | $13.91 | $15.61 | +2.63% | 12,389,400 |
| Aug 2013 | $11.20 | $15.48 | $10.16 | $15.21 | +37.52% | 12,654,800 |
| Jul 2013 | $9.23 | $12.29 | $9.00 | $11.06 | -7.53% | 18,660,500 |
| Jun 2013 | $13.35 | $13.66 | $10.73 | $11.96 | -10.88% | 11,775,000 |
| May 2013 | $9.13 | $14.30 | $8.17 | $13.42 | +46.51% | 11,799,000 |
| Apr 2013 | $7.52 | $10.44 | $6.56 | $9.16 | +22.30% | 4,291,900 |
| Mar 2013 | $6.11 | $7.71 | $5.93 | $7.49 | +21.59% | 3,524,800 |
| Feb 2013 | $5.82 | $6.55 | $5.60 | $6.16 | +5.30% | 2,282,400 |
| Jan 2013 | $6.74 | $7.21 | $5.56 | $5.85 | -12.56% | 1,836,800 |
| Dec 2012 | $7.13 | $7.49 | $6.02 | $6.69 | -6.56% | 2,074,800 |
| Nov 2012 | $6.33 | $8.27 | $6.24 | $7.16 | +12.05% | 6,552,200 |
| Oct 2012 | $4.54 | $7.14 | $4.44 | $6.39 | +40.44% | 5,841,100 |
| Sep 2012 | $3.25 | $4.58 | $3.21 | $4.55 | +40.43% | 1,189,300 |
| Aug 2012 | $3.41 | $3.49 | $2.86 | $3.24 | -4.71% | 726,900 |
| Jul 2012 | $3.28 | $3.83 | $3.24 | $3.40 | +4.29% | 1,464,800 |
| Jun 2012 | $2.75 | $3.79 | $2.69 | $3.26 | +15.60% | 6,174,600 |
| May 2012 | $2.89 | $4.93 | $2.66 | $2.82 | -2.42% | 5,095,100 |
| Apr 2012 | $3.63 | $3.76 | $2.84 | $2.89 | -20.39% | 1,258,300 |
| Mar 2012 | $4.29 | $4.32 | $3.57 | $3.63 | -14.79% | 1,680,400 |
| Feb 2012 | $4.85 | $5.39 | $4.26 | $4.26 | -11.62% | 1,567,400 |
| Jan 2012 | $3.12 | $5.50 | $3.04 | $4.82 | +58.03% | 5,658,700 |
| Dec 2011 | $3.21 | $3.38 | $2.65 | $3.05 | -5.28% | 1,372,700 |
| Nov 2011 | $3.31 | $3.54 | $2.64 | $3.22 | -8.78% | 1,997,700 |
| Oct 2011 | $5.00 | $5.05 | $2.75 | $3.53 | -30.51% | 4,769,000 |
| Sep 2011 | $4.80 | $5.23 | $4.01 | $5.08 | +6.95% | 3,232,200 |
| Aug 2011 | $11.50 | $11.50 | $3.20 | $4.75 | -58.66% | 7,947,200 |
| Jul 2011 | $12.01 | $12.62 | $11.01 | $11.49 | -4.17% | 2,447,800 |
| Jun 2011 | $10.50 | $13.50 | $9.74 | $11.99 | +11.85% | 9,806,900 |
| May 2011 | $8.72 | $10.74 | $7.64 | $10.72 | +23.08% | 1,440,800 |
| Apr 2011 | $6.79 | $9.79 | $6.70 | $8.71 | +29.04% | 2,296,200 |
| Mar 2011 | $5.40 | $6.89 | $4.69 | $6.75 | +22.73% | 1,899,640 |
| Feb 2011 | $6.00 | $6.00 | $5.10 | $5.50 | -6.78% | 627,500 |
| Jan 2011 | $6.50 | $6.60 | $5.80 | $5.90 | -6.35% | 773,590 |
| Dec 2010 | $7.00 | $7.10 | $5.70 | $6.30 | -13.70% | 2,278,180 |
| Nov 2010 | $6.90 | $7.30 | $6.80 | $7.30 | 0.00% | 586,910 |
| Oct 2010 | $7.20 | $7.30 | $6.70 | $7.30 | +1.39% | 486,300 |
| Sep 2010 | $7.20 | $7.30 | $6.80 | $7.20 | -1.37% | 563,160 |
| Aug 2010 | $7.60 | $7.60 | $6.70 | $7.30 | +1.39% | 570,140 |
| Jul 2010 | $6.50 | $7.70 | $6.20 | $7.20 | +7.46% | 1,243,560 |
| Jun 2010 | $8.20 | $8.30 | $5.90 | $6.70 | -17.28% | 3,157,670 |
| May 2010 | $10.70 | $11.00 | $7.80 | $8.10 | -24.30% | 1,301,750 |
| Apr 2010 | $11.40 | $12.10 | $10.30 | $10.70 | -8.55% | 1,862,150 |
| Mar 2010 | $10.20 | $13.20 | $10.20 | $11.70 | +12.50% | 3,858,240 |
| Feb 2010 | $8.40 | $11.90 | $8.00 | $10.40 | +25.30% | 3,184,590 |
| Jan 2010 | $7.80 | $9.30 | $7.50 | $8.30 | +7.79% | 1,626,400 |
| Dec 2009 | $7.80 | $8.10 | $7.20 | $7.70 | 0.00% | 1,070,360 |
| Nov 2009 | $7.10 | $8.30 | $7.00 | $7.70 | +10.00% | 1,128,160 |
| Oct 2009 | $8.10 | $8.50 | $7.00 | $7.00 | -14.63% | 1,113,990 |
| Sep 2009 | $8.80 | $9.00 | $7.70 | $8.20 | -6.82% | 1,263,350 |
| Aug 2009 | $9.90 | $10.20 | $8.50 | $8.80 | -11.11% | 1,568,730 |
| Jul 2009 | $10.00 | $10.90 | $8.00 | $9.90 | -1.00% | 4,383,260 |
| Jun 2009 | $17.40 | $25.70 | $9.30 | $10.00 | -40.48% | 12,440,530 |
| May 2009 | $13.70 | $17.90 | $12.50 | $16.80 | +26.32% | 2,323,050 |
| Apr 2009 | $10.00 | $15.00 | $8.70 | $13.30 | +33.00% | 1,738,680 |
| Mar 2009 | $9.30 | $11.30 | $7.60 | $10.00 | +8.70% | 1,448,610 |
| Feb 2009 | $4.40 | $9.50 | $4.00 | $9.20 | +109.09% | 1,420,050 |
| Jan 2009 | $4.60 | $5.40 | $4.00 | $4.40 | -6.38% | 493,100 |
| Dec 2008 | $6.20 | $6.20 | $4.70 | $4.70 | -24.19% | 425,290 |
| Nov 2008 | $3.90 | $7.80 | $3.40 | $6.20 | +67.57% | 853,070 |
| Oct 2008 | $4.60 | $5.00 | $3.20 | $3.70 | -27.45% | 685,630 |
| Sep 2008 | $5.00 | $6.30 | $4.30 | $5.10 | +6.25% | 480,350 |
| Aug 2008 | $6.90 | $7.90 | $4.80 | $4.80 | -30.43% | 603,820 |
| Jul 2008 | $3.90 | $9.70 | $3.90 | $6.90 | +72.50% | 1,151,750 |
| Jun 2008 | $6.00 | $6.20 | $3.90 | $4.00 | -33.33% | 735,080 |
| May 2008 | $7.20 | $7.20 | $5.60 | $6.00 | -15.49% | 506,280 |
| Apr 2008 | $6.90 | $7.70 | $6.30 | $7.10 | +4.41% | 658,570 |
| Mar 2008 | $8.00 | $8.20 | $5.70 | $6.80 | -12.82% | 630,790 |
| Feb 2008 | $7.40 | $9.20 | $7.40 | $7.80 | +5.41% | 813,260 |
| Jan 2008 | $8.40 | $9.20 | $6.60 | $7.40 | -10.84% | 1,026,250 |
| Dec 2007 | $9.00 | $10.20 | $8.00 | $8.30 | -6.74% | 1,239,270 |
| Nov 2007 | $8.60 | $10.70 | $7.80 | $8.90 | +3.49% | 1,636,730 |
| Oct 2007 | $7.00 | $10.60 | $6.60 | $8.60 | +24.64% | 3,642,520 |
| Sep 2007 | $6.40 | $7.70 | $6.20 | $6.90 | +11.29% | 851,830 |
| Aug 2007 | $7.20 | $7.40 | $5.60 | $6.20 | -11.43% | 1,627,970 |
| Jul 2007 | $8.00 | $8.20 | $6.70 | $7.00 | -13.58% | 1,299,100 |
| Jun 2007 | $7.70 | $8.50 | $6.80 | $8.10 | +5.19% | 3,527,770 |
| May 2007 | $10.50 | $10.80 | $7.50 | $7.70 | -25.96% | 6,128,980 |
| Apr 2007 | $9.40 | $12.20 | $8.90 | $10.40 | +10.64% | 3,931,490 |
| Mar 2007 | $13.60 | $16.30 | $6.80 | $9.40 | -33.80% | 9,669,570 |
| Feb 2007 | $9.60 | $16.50 | $8.90 | $14.20 | +47.92% | 7,658,470 |
| Jan 2007 | $9.00 | $12.90 | $8.50 | $9.60 | +9.09% | 5,068,840 |
| Dec 2006 | $17.50 | $17.50 | $8.00 | $8.80 | -48.54% | 6,463,890 |
| Nov 2006 | $13.30 | $19.80 | $11.80 | $17.10 | +28.57% | 4,980,380 |
| Oct 2006 | $13.60 | $14.20 | $12.60 | $13.30 | -2.21% | 1,299,880 |
| Sep 2006 | $12.80 | $15.40 | $11.10 | $13.60 | +11.48% | 1,887,290 |
| Aug 2006 | $12.60 | $12.80 | $10.20 | $12.20 | -2.40% | 844,870 |
| Jul 2006 | $15.10 | $16.00 | $10.30 | $12.50 | -21.88% | 1,640,740 |
| Jun 2006 | $16.50 | $18.30 | $13.40 | $16.00 | -4.19% | 1,892,380 |
| May 2006 | $17.70 | $20.50 | $14.60 | $16.70 | -7.22% | 2,909,010 |
| Apr 2006 | $19.50 | $20.10 | $16.50 | $18.00 | -7.69% | 2,228,760 |
| Mar 2006 | $25.20 | $27.90 | $18.30 | $19.50 | -21.05% | 5,582,390 |
| Feb 2006 | $25.00 | $25.90 | $20.90 | $24.70 | -2.37% | 2,806,540 |
| Jan 2006 | $19.80 | $33.50 | $19.50 | $25.30 | +31.77% | 7,568,720 |
| Dec 2005 | $12.80 | $20.40 | $12.10 | $19.20 | +50.00% | 7,331,960 |
| Nov 2005 | $12.10 | $14.10 | $11.50 | $12.80 | +2.40% | 681,800 |
| Oct 2005 | $13.90 | $14.10 | $11.00 | $12.50 | -6.72% | 1,034,420 |
| Sep 2005 | $10.00 | $16.40 | $8.60 | $13.40 | +44.09% | 3,944,050 |
| Aug 2005 | $10.20 | $16.30 | $9.30 | $9.30 | -7.92% | 2,717,360 |
| Jul 2005 | $10.00 | $10.30 | $8.90 | $10.10 | +3.06% | 299,310 |
| Jun 2005 | $13.80 | $14.50 | $8.60 | $9.80 | -22.83% | 1,524,520 |
| May 2005 | $12.80 | $13.80 | $11.00 | $12.70 | -0.78% | 455,260 |
| Apr 2005 | $8.70 | $13.40 | $7.90 | $12.80 | +50.59% | 910,340 |
| Mar 2005 | $13.10 | $14.00 | $8.00 | $8.50 | -34.11% | 709,920 |
| Feb 2005 | $18.00 | $18.00 | $12.00 | $12.90 | -27.53% | 326,570 |
| Jan 2005 | $22.70 | $23.00 | $15.10 | $17.80 | -19.09% | 474,000 |
| Dec 2004 | $15.90 | $24.80 | $15.00 | $22.00 | +40.13% | 1,328,940 |
| Nov 2004 | $17.90 | $18.10 | $12.40 | $15.70 | -9.25% | 720,530 |
| Oct 2004 | $17.00 | $20.00 | $14.90 | $17.30 | +2.98% | 175,850 |
| Sep 2004 | $18.10 | $22.10 | $15.00 | $16.80 | -0.59% | 275,790 |
| Aug 2004 | $13.70 | $18.00 | $10.00 | $16.90 | +4.32% | 309,400 |
| Jul 2004 | $23.00 | $23.30 | $13.40 | $16.20 | -27.68% | 354,890 |
| Jun 2004 | $23.50 | $24.00 | $19.80 | $22.40 | -1.75% | 211,820 |
| May 2004 | $29.60 | $30.00 | $20.50 | $22.80 | -22.97% | 492,520 |
| Apr 2004 | $31.20 | $34.00 | $28.50 | $29.60 | -5.43% | 366,130 |
| Mar 2004 | $33.60 | $36.90 | $28.70 | $31.30 | -7.12% | 469,380 |
| Feb 2004 | $35.20 | $40.00 | $31.00 | $33.70 | -7.67% | 661,810 |
| Jan 2004 | $29.90 | $42.80 | $29.60 | $36.50 | +22.90% | 897,010 |
| Dec 2003 | $29.60 | $33.70 | $25.00 | $29.70 | +0.34% | 691,820 |
| Nov 2003 | $30.30 | $32.80 | $27.50 | $29.60 | -3.90% | 477,790 |
| Oct 2003 | $27.00 | $34.00 | $27.00 | $30.80 | +8.07% | 580,900 |
| Sep 2003 | $26.10 | $33.90 | $26.10 | $28.50 | +5.56% | 967,730 |
| Aug 2003 | $25.00 | $30.00 | $23.00 | $27.00 | +20.00% | 654,140 |
| Jul 2003 | $30.40 | $37.40 | $19.60 | $22.50 | -16.36% | 2,219,320 |
| Jun 2003 | $25.60 | $35.60 | $19.00 | $26.90 | +13.50% | 1,140,960 |
| May 2003 | $12.40 | $28.30 | $10.50 | $23.70 | +97.50% | 1,160,330 |
| Apr 2003 | $6.40 | $12.00 | $6.00 | $12.00 | +90.48% | 915,520 |
| Mar 2003 | $4.90 | $6.50 | $4.20 | $6.30 | +28.57% | 148,890 |
| Feb 2003 | $4.80 | $5.30 | $3.90 | $4.90 | 0.00% | 124,750 |
| Jan 2003 | $4.40 | $6.50 | $4.40 | $4.90 | +11.36% | 172,300 |
| Dec 2002 | $6.70 | $7.30 | $4.20 | $4.40 | -31.25% | 306,850 |
| Nov 2002 | $4.30 | $6.80 | $4.20 | $6.40 | +36.17% | 335,080 |
| Oct 2002 | $4.10 | $6.30 | $3.20 | $4.70 | +14.63% | 573,710 |
| Sep 2002 | $18.60 | $19.40 | $3.70 | $4.10 | -77.84% | 1,745,960 |
| Aug 2002 | $20.00 | $20.00 | $15.00 | $18.50 | -2.63% | 105,700 |
| Jul 2002 | $14.40 | $19.30 | $10.70 | $19.00 | +35.71% | 231,150 |
| Jun 2002 | $18.60 | $26.70 | $12.40 | $14.00 | -24.32% | 805,700 |
| May 2002 | $27.30 | $29.50 | $13.00 | $18.50 | -32.48% | 465,730 |
| Apr 2002 | $29.50 | $31.00 | $25.20 | $27.40 | -2.14% | 205,570 |
| Mar 2002 | $26.30 | $32.50 | $26.20 | $28.00 | +2.56% | 93,390 |
| Feb 2002 | $30.60 | $32.50 | $25.10 | $27.30 | -9.90% | 124,700 |
| Jan 2002 | $39.00 | $40.90 | $29.00 | $30.30 | -20.68% | 170,920 |
| Dec 2001 | $33.20 | $43.00 | $30.60 | $38.20 | +17.54% | 163,090 |
| Nov 2001 | $40.20 | $45.50 | $30.00 | $32.50 | -21.31% | 145,590 |
| Oct 2001 | $26.80 | $47.60 | $22.60 | $41.30 | +54.10% | 391,260 |
| Sep 2001 | $40.80 | $43.50 | $21.40 | $26.80 | -33.17% | 182,840 |
| Aug 2001 | $57.60 | $64.00 | $38.10 | $40.10 | -34.69% | 215,860 |
| Jul 2001 | $81.30 | $81.50 | $55.00 | $61.40 | -31.70% | 277,080 |
| Jun 2001 | $61.00 | $97.50 | $52.80 | $89.90 | +48.11% | 379,090 |
| May 2001 | $40.80 | $62.00 | $36.70 | $60.70 | +49.88% | 139,330 |
| Apr 2001 | $45.00 | $49.30 | $33.30 | $40.50 | -9.37% | 93,590 |
| Mar 2001 | $48.75 | $50.63 | $28.75 | $44.69 | -10.62% | 349,560 |
| Feb 2001 | $62.50 | $64.38 | $40.63 | $50.00 | -19.19% | 151,670 |
| Jan 2001 | $34.69 | $70.00 | $34.69 | $61.88 | +78.38% | 626,380 |
| Dec 2000 | $31.25 | $46.25 | $25.63 | $34.69 | +13.27% | 673,870 |
| Nov 2000 | $122.50 | $138.75 | $28.13 | $30.63 | -74.87% | 1,308,270 |
| Oct 2000 | $140.63 | $162.50 | $106.25 | $121.88 | -7.58% | 693,780 |
| Sep 2000 | $190.00 | $195.00 | $128.13 | $131.88 | -32.15% | 383,410 |
| Aug 2000 | $142.50 | $199.38 | $125.63 | $194.38 | +41.36% | 283,740 |
| Jul 2000 | $130.00 | $167.50 | $110.00 | $137.50 | +5.77% | 201,815 |
| Jun 2000 | $160.00 | $180.00 | $110.00 | $130.00 | – | 51,803 |
Seasonality
INSM return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 5.9% | 4.3% | -5.7% | 3.7% | 3.7% | 11.2% | -0.9% | 2.0% | 17.0% | -2.2% | 11.1% | -3.5% |
| Months up | 5 of 10 | 5 of 10 | 2 of 10 | 5 of 10 | 3 of 10 | 8 of 10 | 5 of 10 | 6 of 10 | 6 of 10 | 4 of 10 | 7 of 9 | 3 of 9 |
| 2026 | -9.9% | -4.8% | 9.5% | -16.6% | -21.6% | -0.3% | -7.5% | 23.5% | -6.3% | -1.4% | ||
| 2025 | 10.9% | 6.5% | -6.5% | -5.6% | -3.2% | 44.3% | 6.6% | 26.9% | 5.8% | 31.7% | 9.6% | -16.2% |
| 2024 | -10.3% | -0.3% | -2.1% | -8.9% | 122.7% | 21.7% | 8.6% | 5.1% | -4.5% | -7.8% | 11.7% | -8.1% |
| 2023 | 7.8% | -5.3% | -16.3% | 14.4% | -2.4% | 10.9% | 4.7% | -0.9% | 15.3% | -0.8% | -0.2% | 23.9% |
| 2022 | -16.7% | 5.4% | -1.7% | -6.5% | -14.3% | 4.8% | 12.2% | 11.3% | -12.5% | -19.6% | 6.8% | 8.1% |
| 2021 | 12.9% | -4.8% | -4.8% | -1.0% | -27.1% | 15.7% | -13.6% | 14.0% | -1.8% | 9.5% | -8.7% | -1.0% |
| 2020 | -14.0% | 21.2% | -35.6% | 43.5% | 5.6% | 13.4% | -5.2% | 7.9% | 14.0% | 2.5% | 18.4% | -14.7% |
| 2019 | 85.3% | 22.0% | -2.0% | 4.7% | -20.5% | 5.7% | -14.3% | -25.1% | 7.3% | 5.4% | 24.0% | 3.6% |
| 2018 | -18.4% | -4.8% | -7.0% | 8.0% | 14.5% | -15.1% | 5.2% | -19.9% | 1.5% | -27.8% | 22.7% | -26.7% |
| 2017 | 11.6% | 7.9% | 9.9% | 5.4% | -16.4% | 11.3% | -5.8% | -23.2% | 151.3% | -13.5% | 15.5% | -0.0% |