Intimation of Credit Rating issued by India Ratings and Research Private Limited vide press release dated August 17, 2026

Corporate Office: Registered Office: Star 1, Opp IIM Bangalore, Bilekahalli, Cyber One, Unit No. 902, Sector 30A Bannergha(cid:425)a Road, Bengaluru – Plot No - 4 & 6, Vashi, Navi Mumbai 560076, India 400703 India T: +91 80 6784 0738 F: +91 22 2789 2924 T: 91 22 2789 2942 Date: August 18, 2026 BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers, Exchange Plaza, C-1, Block G, Dalal Street, Bandra Kurla Complex, Mumbai- 400001 Bandra (E), Mumbai – 400 051 Scrip Code: 544292, ISIN: INE013P01021 Symbol: ONESOURCE Dear Sir/Madam, Subject: Intimation under Regulation 30 read with Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’) Pursuant to Regulation 30 read with Part A, Para A of Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, (‘Listing Regulations’), we wish to inform that the India Ratings & Research (Ind- Ra) has upgraded the credit rating of OneSource Specialty Pharma Limited (the ‘Company’) as follows: Details of Instruments Instrument Type Regulator of Size of Issue Rating assigned Rating Acton Instrument (INR million) along with Outlook/ Watch Bank loan facilities RBI 11,250.51 IND A/ Long-term rating upgraded and Positive/ short-term rating affirmed IND A1 Bank loan facilities RBI 4,287.08 IND A/ Assigned Positive/ IND A1 Copy of the press release issued by India Ratings and Research is enclosed herewith in Annexure. This intimation is in accordance with the SEBI Master Circular no. SEBIHO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026. This is for your information and records. For OneSource Specialty Pharma Limited Trisha A Compliance Officer and Company Secretary Membership Number: A47635 OneSource Specialty Pharma Limited info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497 InRdaitai ngs &Researcn AF iGtrcohCu opm pany IndRiaat iUnpggsr aOdneess ouSrpceec iPahlatrym Baa'nsLk o aFna ciltio't IiNeDs A'/PosRiattiAevdsed ;i tiLoinmailt s Aug1 72,0 216O nesouSrpceec iPahlatryLm iam itIeP dh armaceuticals IndRiaat ianngRdse sea(rIcnhd h-aRusap )g raOdneeds oSupreccei PahlatrLymi am it(eOdS'PbsLa )nl ko afna cilities' long-rtaettrio'mn I gN Dw/\ia tP ho siOtuitvlefo roo'kmI NAD- 'tahnaedff irtmhesedh ortr-atteairt'nm Ig NA 1D a' s f ollows: DetaoifIl nss truments Ratiansgs igned InstrumeRnetg uloaft orD atoef CouponM aturitSyi zoefI ssue alownigt h RatiAncgt ion Type InstrumeInsts uanceR ate Date (INmRi llion) OutloWoak/t ch - - - Banlko an RBI 11,250.51 IND Long-rtaetrimn g facilities A/Positiuvpeg/rIaaNdnDed d A1 shortr-atteirnmg affirmed Banlko an RBI 4,287.08 IND Assigned facilities A/Positive/IND AnalyAtpipcraola ch Ind-hRafasu lcloyn solOiSdPaaLtn eiddt w sh oolwlnye sdu bsidBiiaorliPeerxsii,vLs ai tmeiS tterdiP;dh easrS mear vices PrivLaitmei OtneedS;o uSrpceec iPatleLt.iy m iStiendg,a pBoiroelP;et xeLi.is m iStiendg,a pOonreeS;o uSrpceec ialty PharImnacU .S;Aa nOdn eSouSrocftegP etlLesi. m iStiendg,a tpoao rrreai ttv here a tiansag ltslh,c e o mpaonpieersia nt e thsei mliilonafber u siannehdsa sv aec ommmoann agement. DetaiRlaetdi oonfta hlReea tiAncgt ion Thuep grraedfel tehscett rse ngtohfOe SnPiLbn'ugss inpersosffo illleo,tw hisenu gc cecsosmfmuelr cioafil tidssr autgi­on devciocme bin(aDtOipCol)na tafnoidrn mc recaosnitnrgif bruoctmoi momne rgcliuacla gpoenp-tlii(dkGeeL- Ps1-u 1p)p lies. Ind-bReal itehvceeo sm pahnayts r ansiftrioaomp n reedd omidneavnetlloyp mreenvte-mnlouededte ola ni ncreasingly commerscuipapll myo-dleesldu, p pobrytm eudl tciupslteo lmaeurn clhoensg,-s tueprpamlg yr eemaenndct asp,a city expansTihoedn e.m onstcroantveedro sfdi eovne loppmreonjiten cttcoso mmerscuipaplla inedts h rea mp-oufp commerrceivaehlna uvieem proivtresed v evniusei sbtirleintgyct,uh setnosemtdei rc kainnrdee sdsu,ec xeedc urtiisokn. TheP osiOtuitvlero eofkl Iencdt-seR xap'esc toafat c ioonnt iinmuperdo vienmO eSnPtLb 'uss inpersosfa inldce r edit metroivcetsrh m ee dituemr dmr,i bvyet nhr ea mpo-fcu opm merGcLiPa-ol1p portaunni intcireecsao,sn itnrgif bruotmi on commerscuipapallg yr ee(mCeSnrAte) v einmuper,o cvaipnaguc tiitlyi asnasdtt iroenn,g otfhc eansfihln ocgwo su pwlietdh