Despite an 87.0% year-over-year revenue increase in 2026Q1, the company's operating margin remains deeply negative at -47.7% due to escalating SG&A expenses.
| Metric | TTM | Dec'25 | Dec'24 | Dec'23 | Dec'22 | Dec'21 | Dec'20 | Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 | Dec'08 | Dec'07 | Dec'06 | Dec'05 | Dec'04 | Dec'03 | Dec'02 | Dec'01 | Dec'00 | Dec'99 | Dec'98 | Dec'97 | Dec'96 |
|---|
| Sales/Revenue | 1.06B | 944M | 705.14M | 787.65M | 587.37M | 810.46M | 729.26M | 1.12B | 599.67M | 514.18M | 372.78M | 283.7M | 214.16M | 147.28M | 102.05M | 99.09M | 108.47M | 121.6M | 107.19M | 58.34M | 14.86M | 40.13M | 42.62M | 49.99M | 80.18M | 53.27M | 37.26M | 33.9M | 39.2M | 32.7M | 22.7M |
| Revenue Growth % | 47.49% | 33.87% | -10.48% | 34.1% | -27.53% | 11.13% | -35.04% | 87.2% | 16.63% | 37.93% | 31.4% | 32.47% | 45.41% | 44.33% | 2.99% | -8.65% | -10.8% | 13.44% | 83.72% | 292.65% | -62.98% | -5.84% | -14.73% | -37.65% | 50.51% | 43% | 9.9% | -13.52% | 19.88% | 44.05% | 74.62% |
| Cost of Goods Sold | 17.47M | 16M | 11.21M | 9.13M | 14.12M | 10.84M | 11.95M | 4.38M | 1.82M | 0 | 0 | 322.29M | 241.75M | 184.03M | 158.46M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -5.54M | -5.2M | -4.3M | -3.2M | -2.6M |
| COGS % of Revenue | - | 1.69% | 1.59% | 1.16% | 2.4% | 1.34% | 1.64% | 0.39% | 0.3% | - | - | 113.6% | 112.88% | 124.95% | 155.28% | - | - | - | - | - | - | - | - | - | - | - | -14.86% | -15.34% | -10.97% | -9.79% | -11.45% |
| Gross Profit | 1.04B | 928M | 693.92M | 778.51M | 573.25M | 799.61M | 717.32M | 1.12B | 597.85M | 514.18M | 372.78M | -38.59M | -27.59M | -36.75M | -56.41M | 99.09M | 108.47M | 121.6M | 107.19M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 42.79M | 39.1M | 43.5M | 35.9M | 25.3M |
| Gross Margin % | 98.35% | 98.31% | 98.41% | 98.84% | 97.6% | 98.66% | 98.36% | 99.61% | 99.7% | 100% | 100% | -13.6% | -12.88% | -24.95% | -55.28% | 100% | 100% | 100% | 100% | - | - | - | - | - | - | - | 114.86% | 115.34% | 110.97% | 109.79% | 111.45% |
| Gross Profit Growth % | - | 33.73% | -10.87% | 35.81% | -28.31% | 11.47% | -35.85% | 87.04% | 16.27% | 37.93% | 1066.02% | -39.87% | 24.92% | 34.85% | -156.93% | -8.65% | -10.8% | 13.44% | - | - | - | - | - | - | - | -100% | 9.44% | -10.11% | 21.17% | 41.9% | 60.13% |
| Operating Expenses | 1.39B | 1.31B | 1.17B | 1.13B | 983.44M | 829.8M | 889.4M | 752.33M | 659.23M | 483.13M | 392.94M | 37.17M | 20.14M | 14.92M | 12.52M | 170.19M | 156.83M | 149.14M | 120.25M | 91.26M | 80.08M | 97.31M | 160.48M | 128.97M | 130.99M | 99.38M | 71.78M | 82.2M | 76M | 67.2M | 54.4M |
| OpEx % of Revenue | - | 138.77% | 165.78% | 143.75% | 167.43% | 102.39% | 121.96% | 67.02% | 109.93% | 93.96% | 105.41% | 13.1% | 9.4% | 10.13% | 12.26% | 171.76% | 144.58% | 122.65% | 112.18% | 156.42% | 538.91% | 242.48% | 376.49% | 257.99% | 163.37% | 186.54% | 192.67% | 242.48% | 193.88% | 205.5% | 239.65% |
| Selling, General & Admin | 467.76M | 394M | 267.5M | 232.6M | 150.29M | 170.9M | 332.2M | 286.64M | 244.62M | 108.49M | 48.62M | 37.17M | 20.14M | 14.92M | 12.52M | 12.79M | 11.67M | 14.52M | 13.81M | 13.06M | 11.2M | 7.89M | 9.58M | 10.2M | 5.54M | 15.63M | 9.23M | 10.6M | 9.5M | 8.1M | 51.8M |
| SG&A % of Revenue | - | 41.74% | 37.94% | 29.53% | 25.59% | 21.09% | 45.55% | 25.53% | 40.79% | 21.1% | 13.04% | 13.1% | 9.4% | 10.13% | 12.26% | 12.91% | 10.76% | 11.94% | 12.88% | 22.38% | 75.39% | 19.65% | 22.47% | 20.41% | 6.92% | 29.35% | 24.78% | 31.27% | 24.23% | 24.77% | 228.19% |
| Research & Development | 925.39M | 916M | 901.53M | 899.63M | 833M | 643M | 535M | 466M | 414.6M | 374.64M | 344.32M | 322.29M | 241.75M | 184.03M | 158.46M | 157.4M | 145.16M | 134.62M | 106.44M | 92.64M | 80.57M | 82.47M | 118.47M | 116.96M | 124.07M | 83.74M | 57.01M | 66.4M | 62.2M | 55.9M | 45.7M |
| R&D % of Revenue | - | 97.03% | 127.85% | 114.22% | 141.82% | 79.34% | 73.36% | 41.51% | 69.14% | 72.86% | 92.37% | 113.6% | 112.88% | 124.95% | 155.28% | 158.85% | 133.82% | 110.71% | 99.3% | 158.78% | 542.21% | 205.48% | 277.95% | 233.97% | 154.75% | 157.19% | 153.04% | 195.87% | 158.67% | 170.95% | 201.32% |
| Other Operating Expenses | 31K | 0 | -26K | 19K | 147K | 15.9M | 22.2M | -312K | 0 | 0 | 0 | -322.29M | -241.75M | -184.03M | -158.46M | 0 | 0 | 0 | 0 | 0 | -536K | 6.96M | 32.43M | 1.8M | 1.37M | 0 | 5.54M | 5.2M | 4.3M | 3.2M | -43.1M |
| Operating Income | -352.79M | -382M | -475.08M | -353.73M | -410.19M | -30.19M | -172.08M | 365.88M | -61.37M | 31.05M | -20.16M | -75.76M | -47.73M | -51.67M | -68.92M | -71.1M | -48.36M | -27.54M | -13.06M | -32.92M | -65.22M | -57.18M | -117.85M | -78.98M | -50.81M | -46.1M | -28.99M | -43.1M | -32.5M | -31.3M | -29.1M |
| Operating Margin % | -33.35% | -40.47% | -67.37% | -44.91% | -69.84% | -3.72% | -23.6% | 32.59% | -10.23% | 6.04% | -5.41% | -26.7% | -22.29% | -35.08% | -67.54% | -71.76% | -44.58% | -22.65% | -12.18% | -56.42% | -438.91% | -142.48% | -276.49% | -157.99% | -63.37% | -86.54% | -77.82% | -127.14% | -82.91% | -95.72% | -128.19% |
| Operating Income Growth % | - | 19.59% | -34.31% | 13.76% | -1258.88% | 82.46% | -147.03% | 696.17% | -297.67% | 254% | 73.39% | -58.73% | 7.62% | 25.04% | 3.06% | -47.03% | -75.6% | -110.86% | 60.33% | 49.52% | -14.05% | 51.48% | -49.22% | -55.43% | -10.22% | -59.03% | 32.74% | -32.62% | -3.83% | -7.56% | -13.67% |
| EBITDA | 4.47B | -361.75M | -453.09M | -331.23M | -388.09M | -10.63M | -154.92M | 381.88M | -48.84M | 39.4M | -11.13M | -65.52M | -38.33M | -41.88M | -58.17M | -59.32M | -39.18M | -18.23M | -6.24M | -26.15M | -58M | -46.8M | -105.68M | -66.72M | -41.39M | -39.13M | -23.45M | -37.9M | -28.2M | -28.1M | -26.5M |
| EBITDA Margin % | 422.99% | -38.32% | -64.26% | -42.05% | -66.07% | -1.31% | -21.24% | 34.02% | -8.15% | 7.66% | -2.98% | -23.1% | -17.9% | -28.44% | -57% | -59.86% | -36.12% | -15% | -5.82% | -44.83% | -390.35% | -116.6% | -247.94% | -133.48% | -51.62% | -73.46% | -62.96% | -111.8% | -71.94% | -85.93% | -116.74% |
| EBITDA Growth % | 1092.84% | 20.16% | -36.79% | 14.65% | -3552.23% | 93.14% | -140.57% | 881.83% | -223.98% | 454.06% | 83.02% | -70.96% | 8.49% | 28% | 1.93% | -51.4% | -114.86% | -192.09% | 76.13% | 54.91% | -23.94% | 55.72% | -58.39% | -61.21% | -5.76% | -66.85% | 38.11% | -34.4% | -0.36% | -6.04% | -16.23% |
| D&A (Non-Cash Add-back) | 4.83B | 20.25M | 21.99M | 22.5M | 22.11M | 19.56M | 17.16M | 15.99M | 12.53M | 8.35M | 9.03M | 10.24M | 9.4M | 9.78M | 10.76M | 11.78M | 9.18M | 9.3M | 6.82M | 6.76M | 7.22M | 10.38M | 12.17M | 12.25M | 9.42M | 6.97M | 5.54M | 5.2M | 4.3M | 3.2M | 2.6M |
| EBIT | -291.06M | -307M | -375.71M | -258.37M | -249.86M | -24.75M | -128.35M | 351.21M | -31.37M | 27.99M | -18.67M | -51.17M | -32.18M | -47.2M | -53.44M | -68.06M | -47.93M | -19.09M | -2.71M | -32.92M | -65.75M | -50.22M | -85.43M | -77.17M | -49.44M | -46.1M | -28.99M | -43.1M | -32.5M | -31.3M | -29.1M |
| Net Interest Income | -31.56M | -73M | 16.57M | 7.58M | 17.21M | 695K | 21.05M | 3.44M | -14.6M | -36.57M | -33.38M | -32.43M | -19.53M | -17.27M | -19.31M | -14.32M | -9.86M | -6.31M | 5.71M | 3.87M | -3.07M | -15.22M | -19.59M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Interest Income | 48.37M | 0 | 107.02M | 89.04M | 25.33M | 10.04M | 30.56M | 52.2M | 30.19M | 8.18M | 5.42M | 4.3M | 2.68M | 2.08M | 1.84M | 2.41M | 3.37M | 6.36M | 11.32M | 11.44M | 5.96M | 5.09M | 3M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Interest Expense | 79.93M | 73M | 90.45M | 81.46M | 8.12M | 9.35M | 9.51M | 48.77M | 44.79M | 44.75M | 38.8M | 36.73M | 22.21M | 19.36M | 21.15M | 16.73M | 13.23M | 12.67M | 5.6M | 7.57M | 9.03M | 20.31M | 22.59M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Other Income/Expense | 27.62M | 2M | 15.01M | 19.77M | 152.21M | 1.04M | 37.53M | -27.12M | -14.78M | -47.81M | -37.31M | -12.14M | -6.66M | -14.89M | -5.66M | -13.69M | -12.8M | -4.23M | -1.46M | 32.92M | 65.22M | 57.18M | 117.85M | 78.98M | 50.81M | 46.1M | 28.99M | 43.1M | 32.5M | 31.3M | 29.1M |
| Pretax Income | -325.17M | -380M | -460.07M | -333.96M | -257.99M | -29.15M | -134.55M | 338.77M | -76.16M | -16.76M | -57.47M | -87.91M | -54.39M | -66.56M | -74.59M | -84.79M | -61.16M | -31.77M | -14.52M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Pretax Margin % | -30.74% | -40.25% | -65.25% | -42.4% | -43.92% | -3.6% | -18.45% | 30.18% | -12.7% | -3.26% | -15.42% | -30.99% | -25.4% | -45.19% | -73.09% | -85.57% | -56.38% | -26.12% | -13.55% | - | - | - | - | - | - | - | - | - | - | - | - |
| Income Tax | 1.41M | 1M | -6.17M | 32.32M | 11.74M | -551K | 345.19M | 51.51M | -291.14M | -5.98M | 2.93M | 372K | -15.41M | -5.91M | -9.11M | 11K | 92K | 3.19M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Effective Tax Rate % | -0.43% | -0.26% | 1.34% | -9.68% | -4.55% | 1.89% | -256.55% | 15.2% | 382.3% | 35.67% | -5.11% | -0.42% | 28.33% | 8.89% | 12.21% | -0.01% | -0.15% | -10.05% | 0% | - | - | - | - | - | - | - | - | - | - | - | - |
| Net Income | -326.58M | -381M | -453.9M | -366.29M | -269.72M | -28.6M | -444.26M | 278.14M | 273.74M | 346K | -60.4M | -88.28M | -38.98M | -60.64M | -65.48M | -84.8M | -61.25M | 155.07M | -18.17M | -10.99M | -45.9M | -72.4M | -142.5M | -95M | -72.24M | -73.83M | -53.48M | -59.2M | -43M | -31.1M | -26.5M |
| Net Margin % | -30.87% | -40.36% | -64.37% | -46.5% | -45.92% | -3.53% | -60.92% | 24.78% | 45.65% | 0.07% | -16.2% | -31.12% | -18.2% | -41.17% | -64.16% | -85.58% | -56.47% | 127.52% | -16.95% | -18.84% | -308.92% | -180.4% | -334.33% | -190.03% | -90.1% | -138.59% | -143.56% | -174.63% | -109.69% | -95.11% | -116.74% |
| Net Income Growth % | 28.7% | 16.06% | -23.92% | -35.8% | -843.18% | 93.56% | -259.72% | 1.61% | 79015.9% | 100.57% | 31.58% | -126.45% | 35.72% | 7.38% | 22.79% | -38.45% | -139.5% | 953.32% | -65.29% | 76.05% | 36.6% | 49.19% | -50.01% | -31.5% | 2.15% | -38.04% | 9.65% | -37.67% | -38.26% | -17.36% | -11.81% |
| Net Income (Continuing) | -326.58M | -381M | -453.9M | -366.29M | -269.72M | -28.6M | -479.74M | 287.26M | 214.99M | -10.78M | -60.4M | -88.28M | -38.98M | -60.64M | -65.48M | -84.8M | -61.25M | -34.96M | -14.52M | -4.96M | -43M | -72.4M | -142.5M | -95M | -72.24M | -73.83M | -53.48M | -59.2M | -43M | -31.1M | -26.5M |
| Discontinued Operations | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 185.63M | -8.39M | -6.03M | -2.9M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Minority Interest | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 213.45M | 139.08M | 84.27M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.34M | 37.16M | 9.37M | 29.34M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| EPS (Diluted) | -1.98 | -2.38 | -3.04 | -2.56 | -1.90 | -0.20 | -3.18 | 2.06 | 2.04 | -0.05 | -0.72 | -0.74 | -0.33 | -0.55 | -0.65 | -0.85 | -0.62 | 1.58 | -0.13 | -0.13 | -0.62 | -1.15 | -2.52 | -1.71 | -1.33 | -1.67 | -1.44 | -2.06 | -1.60 | -1.17 | -1.04 |
| EPS Growth % | 30.1% | 21.71% | -18.75% | -34.74% | -850% | 93.71% | -254.37% | 0.98% | 4412.9% | 93.43% | 2.7% | -124.24% | 40% | 15.38% | 23.53% | -37.1% | -139.24% | 1315.38% | 0% | 79.03% | 46.09% | 54.37% | -47.37% | -28.57% | 20.36% | -15.97% | 30.1% | -28.75% | -36.75% | -12.5% | 5.45% |
| EPS (Basic) | - | -2.38 | -3.04 | -2.56 | -1.90 | -0.20 | -3.18 | 2.10 | 2.07 | -0.05 | -0.72 | -0.74 | -0.33 | -0.55 | -0.65 | -0.85 | -0.62 | 1.58 | -0.13 | -0.13 | -0.62 | -1.15 | -2.52 | -1.71 | -1.33 | -1.67 | -1.44 | -2.06 | -1.60 | -1.17 | -1.04 |
| Diluted Shares Outstanding | 164.87M | 160M | 149.51M | 143.19M | 141.85M | 141.02M | 139.61M | 142.87M | 134.06M | 126.1M | 120.93M | 119.72M | 117.69M | 110.5M | 100.58M | 99.66M | 99.14M | 98.11M | 94.57M | 83.74M | 74.31M | 62.88M | 56.64M | 55.46M | 54.48M | 44.11M | 37.02M | 28.7M | 26.87M | 26.58M | 25.48M |
| Basic Shares Outstanding | 164.87M | 160M | 149.51M | 143M | 141.85M | 141.02M | 139.61M | 140M | 132.32M | 124.02M | 120.8M | 119.29M | 117.69M | 110.5M | 100.58M | 99.66M | 99.14M | 98.11M | 94.57M | 83.74M | 74.31M | 62.88M | 56.64M | 55.46M | 54.48M | 44.11M | 37.02M | 28.7M | 26.87M | 26.58M | 25.48M |
| Dividend Payout Ratio | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Commercialization execution and dilution
According to the provided financial data, Ionis experienced a 87.0% year-over-year revenue increase in 2026Q1, yet the historical quarterly figures reveal significant volatility driven by milestone-dependent income rather than consistent, organic commercial growth, which complicates the assessment of long-term revenue durability for the company's pipeline.
The reliance on lumpy milestone payments makes it difficult to discern the true trajectory of the company's core commercial product sales. Investors should monitor whether the shift toward self-commercialization can eventually smooth these revenue fluctuations or if the business will remain tethered to the timing of partner-driven events.
As reported in financial statements, Ionis maintains a robust gross margin of 98.8% as of 2026Q1, a figure that reflects the company's historical reliance on high-margin royalty and licensing revenue streams rather than the manufacturing-intensive cost structures typical of traditional pharmaceutical companies.
While these margins appear impressive, they may provide a misleading picture of operational efficiency as the company transitions toward self-commercialization. Future periods will likely see margin compression as the cost of goods sold increases to support internal manufacturing and distribution efforts.
Based on the income statement analysis, Ionis's operating margin of -47.7% in 2026Q1 highlights a persistent inability to scale operating income ahead of gross profit, as the company continues to absorb heavy R&D and SG&A expenses to support its expanding late-stage clinical pipeline.
The lack of operating leverage suggests that the company is currently in a high-investment phase that prioritizes pipeline development over immediate profitability. Investors should watch for a potential inflection point where SG&A growth begins to decelerate relative to revenue as commercial assets reach maturity.
Data from recent filings indicates that SG&A expenses have risen to $150.4M in 2026Q1, reflecting the significant capital commitment required to build an independent commercial infrastructure, which stands in stark contrast to the lower overhead levels maintained during the company's previous licensing-heavy business model.
This trend suggests that management is aggressively prioritizing the transition to a full-scale pharmaceutical company, though this strategy introduces substantial execution risk. The sustainability of this cost structure warrants further investigation, particularly if commercial revenue uptake fails to offset the rising fixed-cost base.
As indicated by the $372M cash position against a high quarterly operating burn, the company faces significant financial pressure, suggesting that the market may be underestimating the potential for dilutive capital raises if commercial product launches do not meet aggressive internal revenue targets in the near term.
Short-sellers might focus on the disconnect between the company's high valuation and its inability to generate consistent positive cash flow from operations. The transition to self-commercialization is a high-stakes pivot that could lead to margin compression and increased financial strain if the competitive landscape for its new therapies intensifies.
Quick answers to the most common questions about buying IONS stock.
For fiscal year 2025, Ionis Pharmaceuticals, Inc. (IONS) reported total revenue of $944.0M. This represents a 4058.6% increase compared to $22.7M in 1996.
Ionis Pharmaceuticals, Inc. (IONS) reported a net loss of $381.0M for the fiscal year ending 2025.
Ionis Pharmaceuticals, Inc. (IONS) reported an operating income of $-382.0M, resulting in an operating profit margin of -40.5%. This margin reflects the operational efficiency of the business before interest and taxes.
Ionis Pharmaceuticals, Inc. (IONS) generated $928.0M in gross profit for the year, representing a gross profit margin of 98.3%. This demonstrates the company's core pricing power and production efficiency.