RAMBUS INC (RMBS) Spending and interest coverage
- R&D / revenue · 12 months: Value (m); Formula and calculation Research and development expense / revenue. Period ending 2026-03-31..
- Stock-based compensation / revenue · 12 months: Value (m); Formula and calculation Share-based compensation / revenue. Period ending 2026-03-31..
- Interest coverage · 12 months: Value (m); Formula and calculation Estimated: average term debt × dated USD coupon proxy + average commercial paper × matching-currency disclosed rate at or before period end. Swaps, foreign-exchange, lease interest and amortization are not quantified..
Spending and interest coverage
Overview →Financial period ending 2026-03-31; current quote (m). Amounts retain their stated periods and units.
| Metric | Value | Formula and calculation |
|---|---|---|
| R&D / revenue · 12 months | (m) | Research and development expense / revenue. Period ending 2026-03-31. Calculation unavailable: missing inputs remain (m). |
| Stock-based compensation / revenue · 12 months | (m) | Share-based compensation / revenue. Period ending 2026-03-31. Calculation unavailable: missing inputs remain (m). |
| Interest coverage · 12 months | (m) | Estimated: average term debt × dated USD coupon proxy + average commercial paper × matching-currency disclosed rate at or before period end. Swaps, foreign-exchange, lease interest and amortization are not quantified. Calculation unavailable: missing inputs remain (m). |
Calculation inputs
| Input | Amount with unit | Raw financial data |
|---|---|---|
| Research and development spending | 195.32M USD | Research and Development Expense |
| Revenue | (m) | |
| Stock-based compensation | 54.34M USD | Share-based Payment Arrangement, Noncash Expense |
| Operating income | 258.83M USD | Operating Income (Loss) |
| Interest expense · reported / estimated | (m) | Interest Expense · Estimated expense assumptions |
Latest interest expense basis: (m). Estimated values carry *; expand each history row’s basis for its dated balances and rate assumptions.
Calculated history
Changes compare with the next older row (previous quarter), unless explicitly labeled otherwise. Rolling 12-month growth compares two successive quarter-end rolling totals; it is not year-over-year growth.
| Period ending | Research and development spending (USD) | Revenue (USD) | Stock-based compensation (USD) | Operating income (USD) | Interest expense · reported / estimated (USD) | R&D / revenue | SBC / revenue | Interest coverage | Interest expense basis |
|---|---|---|---|---|---|---|---|---|---|
| 2026-03-31 | $195.32M | (m) | $54.34M | $258.83M | (m) | (m) | (m) | (m) | (m) |
| 2025-12-31 | $187.71M | (m) | $54.27M | $260.22M | (m) | (m) | (m) | (m) | (m) |
| 2025-09-30 | $182.16M | (m) | $51.56M | $247.25M | (m) | (m) | (m) | (m) | (m) |
| 2025-06-30 | $173.95M | (m) | $49.35M | $238.69M | (m) | (m) | (m) | (m) | (m) |
| 2025-03-31 | $168.14M | (m) | $46.77M | $216.02M | (m) | (m) | (m) | (m) | (m) |
| 2024-12-31 | $162.88M | (m) | $44.88M | $183.01M | (m) | (m) | (m) | (m) | (m) |
| 2024-09-30 | $155.17M | (m) | $43.68M | $160.28M | (m) | (m) | (m) | (m) | (m) |
| 2024-06-30 | $151.24M | (m) | $41.72M | $210.46M | (m) | (m) | (m) | (m) | (m) |
| 2024-03-31 | $152.29M | (m) | $41.44M | $181.83M | $1.48M | (m) | (m) | 123.27× | Reported |
| 2023-12-31 | $156.83M | (m) | $45.01M | $153.64M | $1.49M | (m) | (m) | 103.11× | Reported |
| 2023-09-30 | $160.96M | (m) | $44.74M | $134.65M | $1.60M | (m) | (m) | 84.31× | Reported |
| 2023-06-30 | $162.89M | (m) | $43.58M | $46.70M | $1.68M | (m) | (m) | 27.83× | Reported |
| 2023-03-31 | $160.85M | (m) | $40.84M | $70.56M | $1.65M | (m) | (m) | 42.77× | Reported |
| 2022-12-31 | $158.77M | (m) | $35.55M | $76.94M | $1.87M | (m) | (m) | 41.06× | Reported |
| 2022-09-30 | $154.91M | (m) | $31.49M | $69.77M | $4.13M | (m) | (m) | 16.91× | Reported |
| 2022-06-30 | $151.21M | (m) | $30.10M | $57.55M | $6.36M | (m) | (m) | 9.05× | Reported |
| 2022-03-31 | $143.14M | (m) | $28.76M | $36.09M | $8.70M | (m) | (m) | 4.15× | Reported |
| 2021-12-31 | $135.68M | (m) | $27.49M | $24.28M | $10.71M | (m) | (m) | 2.27× | Reported |
| 2021-09-30 | $134.17M | (m) | $27.45M | $4.31M | $10.59M | (m) | (m) | 0.41× | Reported |
| 2021-06-30 | $132.31M | (m) | $26.80M | $-12.89M | $10.50M | (m) | (m) | -1.23× | Reported |
| 2021-03-31 | $135.53M | (m) | $26.21M | $-38.08M | $10.40M | (m) | (m) | -3.66× | Reported |
| 2020-12-31 | $139.84M | (m) | $25.78M | $-46.81M | $10.34M | (m) | (m) | -4.53× | Reported |
| 2020-09-30 | $141.91M | (m) | $24.43M | $-49.01M | $10.27M | (m) | (m) | -4.77× | Reported |
| 2020-06-30 | $149.66M | (m) | $24.99M | $-59.39M | $10.18M | (m) | (m) | -5.83× | Reported |
| 2020-03-31 | $152.86M | (m) | $25.36M | $-83.97M | $10.14M | (m) | (m) | -8.28× | Reported |
| 2019-12-31 | $156.81M | (m) | $26.48M | $-104.54M | $9.85M | (m) | (m) | -10.61× | Reported |
| 2019-09-30 | $157.39M | (m) | $27.80M | $-95.53M | $10.55M | (m) | (m) | -9.05× | Reported |
| 2019-06-30 | $159.03M | (m) | $26.60M | $-91.82M | $12.03M | (m) | (m) | -7.63× | Reported |
| 2019-03-31 | $158.84M | (m) | $21.41M | $-74.76M | $14.13M | (m) | (m) | -5.29× | Reported |
| 2018-12-31 | $158.34M | (m) | $21.74M | $-86.97M | $16.28M | (m) | (m) | -5.34× | Reported |
| 2018-09-30 | $160.36M | (m) | $22.82M | $-67.05M | $17.00M | (m) | (m) | -3.94× | Reported |
| 2018-06-30 | $153.43M | $303.91M | $23.60M | $-30.87M | $16.31M | 50.48% | 7.77% | -1.89× | Reported |
| 2018-03-31 | $153.25M | $342.17M | $28.32M | $-2.64M | $14.94M | 44.79% | 8.28% | -0.18× | Reported |
| 2017-12-31 | $149.13M | $393.10M | $27.40M | $54.41M | $13.72M | 37.94% | 6.97% | 3.97× | Reported |
| 2017-09-30 | $148.46M | $388.76M | $25.83M | $39.21M | $13.00M | 38.19% | 6.64% | 3.02× | Reported |
| 2017-06-30 | $146.09M | $379.49M | $24.30M | $34.02M | $12.91M | 38.50% | 6.40% | 2.64× | Reported |
| 2017-03-31 | $137.32M | $361.27M | $22.75M | $37.78M | $12.81M | 38.01% | 6.30% | 2.95× | Reported |
| 2016-12-31 | $129.84M | $336.60M | $21.01M | $33.64M | $12.74M | 38.58% | 6.24% | 2.64× | Reported |
| 2016-09-30 | $116.70M | $315.81M | $18.70M | $53.45M | $12.62M | 36.95% | 5.92% | 4.24× | Reported |
| 2016-06-30 | $110.67M | $299.74M | $16.83M | $59.28M | $12.54M | 36.92% | 5.61% | 4.73× | Reported |
| 2016-03-31 | $111.10M | $296.05M | $16.19M | $62.82M | $12.47M | 37.53% | 5.47% | 5.04× | Reported |
| 2015-12-31 | $111.11M | $296.28M | $15.10M | $71.42M | $12.41M | 37.50% | 5.10% | 5.75× | Reported |
| 2015-09-30 | $113.95M | $291.55M | $15.28M | $68.67M | $12.36M | 39.09% | 5.24% | 5.56× | Reported |
| 2015-06-30 | $113.18M | $287.48M | $15.16M | $65.50M | $12.30M | 39.37% | 5.27% | 5.33× | Reported |
| 2015-03-31 | $111.66M | $291.18M | $15.60M | $70.05M | $17.98M | 38.35% | 5.36% | 3.90× | Reported |
| 2014-12-31 | $110.03M | $296.56M | $14.73M | $75.35M | $24.82M | 37.10% | 4.97% | 3.04× | Reported |
| 2014-09-30 | $108.38M | $297.94M | $14.29M | $63.98M | $31.35M | 36.38% | 4.80% | 2.04× | Reported |
| 2014-06-30 | $108.92M | $301.52M | $14.21M | $58.57M | $36.84M | 36.12% | 4.71% | 1.59× | Reported |
| 2014-03-31 | $112.03M | $282.92M | $12.93M | $44.21M | $35.50M | 39.60% | 4.57% | 1.25× | Reported |
| 2013-12-31 | $117.98M | $271.50M | $14.98M | $22.46M | $32.88M | 43.46% | 5.52% | 0.68× | Reported |
| 2013-09-30 | $124.27M | $255.52M | $16.40M | $12.22M | $30.38M | 48.63% | 6.42% | 0.40× | Reported |
| 2013-06-30 | $127.39M | $239.76M | $18.13M | $-43.94M | $28.95M | 53.13% | 7.56% | -1.52× | Reported |
| 2013-03-31 | $134.96M | $238.05M | $20.77M | $-71.44M | $28.24M | 56.69% | 8.72% | -2.53× | Reported |
| 2012-12-31 | $140.50M | $234.05M | $22.55M | $-90.43M | $27.51M | 60.03% | 9.63% | -3.29× | Reported |
| 2012-09-30 | $143.26M | $259.97M | $24.49M | $-104.54M | $23.20M | 55.11% | 9.42% | -4.51× | Reported |
| 2012-06-30 | $144.90M | $302.70M | $26.62M | $-46.70M | $22.43M | 47.87% | 8.79% | -2.08× | Reported |
| 2012-03-31 | $130.77M | $312.70M | $27.43M | $-27.46M | $21.84M | 41.82% | 8.77% | -1.26× | Reported |
| 2011-12-31 | $115.70M | $312.36M | $28.00M | $-1.54M | $21.25M | 37.04% | 8.96% | -0.07× | Reported |
| 2011-09-30 | $104.88M | $319.93M | $28.86M | $59.48M | $20.78M | 32.78% | 9.02% | 2.86× | Reported |
| 2011-06-30 | $95.57M | $251.41M | $29.10M | $37.25M | $20.33M | 38.01% | 11.58% | 1.83× | Reported |
| 2011-03-31 | $94.33M | $224.05M | $30.00M | $33.09M | $18.86M | 42.10% | 13.39% | 1.75× | Reported |
| 2010-12-31 | $92.71M | $323.39M | $30.55M | $226.88M | $19.70M | 28.67% | 9.45% | 11.52× | Reported |
| 2010-09-30 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-06-30 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-03-31 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2009-12-31 | $67.25M | $113.01M | $31.59M | $-75.86M | $20.95M | 59.51% | 27.95% | -3.62× | Reported |
| 2009-09-30 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2009-06-30 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2008-12-31 | $76.22M | $142.49M | $37.17M | $-88.71M | $11.80M | 53.49% | 26.08% | -7.51× | Reported |
(m) means missing inputs. Historical market-based ratios use the saved close on or immediately before period ending and that period’s reported shares; current quotes are not substituted. Five-year projections repeat historical CAGR, not analyst forecasts.
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