| 1952 | Foundation stone of Penicillin Factory (now Hindustan Antibiotics Ltd) laid at Pimpri, Pune. |
| 1954 | Project registered as Hindustan Antibiotics Ltd. |
| Production of Potassium Penicillin 1st Crystals. | |
| 1956 | Factory inaugurated by Pt. Jawaharlal Nehru, Prime Minister of India. |
| 1961 | Presidential Award (Copper shield) awarded for HAs Performance during 1961. |
| 1962 | Streptomycin plant inaugurated by Pt. Jawaharlal Nehru. This plant was financed by Company s surplus resources only. |
| Presidential Award (Silver Shield) for HAs best all-round performance in 1961-62. | |
| 1963 | HAMYCIN An original product of HA released for sale. |
| 1965 | Streptomycin product capacity doubled. |
| 1966 | Aureofungin discovery announced by HAL. |
| Presidential Award (Silver shield) for HAs best all-round performance 1962-63 | |
| 1968 | HA Pilot Plant commissioned. |
| 1970 | Presidential Award. (Copper Shield) for HAs good performance during 1965-66. |
| 1973 | The first worker-director was appointed on the board. This was the first time in the history of Public Sector undertaking that a worker employee participated in the management. |
| 1974 | Production of 6 APA starts. |
| 1975 | Production of Ampicillin started for the first time in India on the commercial basis. |
| 1978 | Gentamicin First batch of Gentamicin Inj. Inaugurated. |
| Gentamicin agreement signed with Ms. Medimpex, Hungary. | |
| 1980 | Agreement signed between HA and Govt. of Karnataka to promote Karnataka Antibiotics & Pharmaceuticals Ltd. (KAPL) |
| 1981 | Maharashtra Antibiotics & Pharmaceuticals (MAPL) A joint sector unit set up near Nagpur. |
| 1982 | Expansion of formulation activities and a new modern formulation (powder injection) plant commissioned. |
| 1985 | HAL received Export Merit Certificate from Basic Drugs & Export promotion council & Govt. of Maharashtra. |
| 1986 | Rehabilitation plan made for HAL and its implementation begins. |
| 1987 | Production value jumps by 40 percent. |
| 1988 | HAL exceeds rehabilitation plan targets. Up gradation of Penicillin capacity to 360 MMU. |
| Installation of high capacity Capsulation machine. (GKF) | |
| 1991 | Creation of I.V. Fluid Plant facility.Upgradation of Penicillin capacity to 800 MMU. |
| 1992 | Commissioning of Carbendazim plant. |
| Commissioning of Aureofungin plant. | |
| Upgradation of Penicillin capacity to 900 MMU. | |
| 1993 | New Liquid Gentamicin Injection line commissioned. |
| Second high capacity (GKF-1500) Capsulation machine installed. | |
| Bagged continuously Ist prize for best safety performance from the Directorate of Industrial Health & Safety and Rotary Club, Pune for 1990-91, 1991-92 & 92-93. | |
| Received a certificate for outstanding export performance for the year 1991-92 instituted by MEMEXCIL. | |
| 1995 | Joint venture agreement between HAL, MAX-GB Ltd. signed on 6-9-1995. |
| Inauguration of Hindustan MAX-GB on 8-10-95 by Honorable Minister for Chemical & Fertilizer Shri Ram Lakhan Yadav. | |
| 2002 | Joint venture with RPG Life Sciences Ltd. |
| 2009 | Inauguration of Cephalosporin Plan. (Ram Vilas Paswan Min.of Chem & Fertilizers). |
| 2010 | Receipt of WHO-GMP certification for Cephalosporin Powder Injectable Plant. |
| 2012 | Commissioning of Betalactum Powder Injectable Plant. |
| 2015 | High Capacity Filling machine for Streptocycline pouches commissioned. |
| 2018 | Achieved the highest value of production and sales for Streptocycline. |
| 2018 | Restarting production of AUREOFUNGIN and HUMAUR |
