About Big Oh Notation Private Limited
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Big Oh Notation Private Limited is a private limited company based in Delhi, India. It operates in the application development and software solutions segment of the technology and IT services sector. It was incorporated on 18 February 2021 and has been in existence for over 5 years.
The company is registered with the Registrar of Companies (ROC), Delhi, under CIN U72900DL2021PTC377209. Its GSTIN is 07AAJCB6434D1ZU (Delhi). The company holds 2 GST registrations, all of them active.
The company has an authorised share capital of ₹1 Lakh and a paid-up capital of ₹1 Lakh. It was formerly known as Big Oh Notation (Opc) Private Limited. It is led by directors Vijay Kumar Rustogi and Imran Khan.
Its last annual general meeting (AGM) was held on 30 September 2025, and its latest financial statements are for the year ended 31 March 2025. The registered office is at Flat No. 805 Type – A 8th Floor Pocket – B Motia Khan Pahar Ganj, Delhi, India – 110055.
As per the financials filed for FY 2025, the company reported a revenue of ₹14.21 Cr, a growth of 14% compared to the previous year. For the same year it recorded a net profit of ₹1.49 Cr (net margin 10.5%) and EBITDA of ₹2.26 Cr (EBITDA margin 15.9%). Revenue has grown at a compounded annual rate (CAGR) of 11% over three years.
The company has about 79 employees on its provident fund (EPFO) records.
The company is associated with 1 brand: Big Oh. As per MCA filings, the company has open charges of ₹1.28 Cr on record. Court records list 4 cases involving the company, including 4 filed by the company; 3 cases are pending.
For more details, the company can be reached via its website bigohtech.com.
Company details
CIN history
Big Oh Notation has one previous CIN (Corporate Identification Number): U72900DL2021OPC377209. The current CIN is U72900DL2021PTC377209, which is the unique identifier assigned by the Registrar of Companies.
| CIN | Status |
|---|---|
| U72900DL2021PTC377209 | Current |
| U72900DL2021OPC377209 | Previous |
Contact details
Big Oh Notation Private Limited's registered office is in Delhi, Delhi. Its website is bigohtech.com. Its e-mail address and telephone number are in the company report.
- Email
- Telephone
- Website
- Registered AddressFlat No. 805 Type – A 8th Floor Pocket – B Motia Khan Pahar Ganj, Delhi, India – 110055
- IndustryInformation Technology, Application Development & Software Solutions
To see the full contact details of Big Oh Notation Private Limited, buy the company report.
- Company details, directors and signatories
- Historical financials and ratios
- Shareholding pattern and group structure
- Charges with holder and property details
- Legal cases, compliance and MCA filings
Brands
Big Oh Notation operates one associated brand: Big Oh. Each brand links to its own profile.
| Brand | Description | Website |
|---|---|---|
| Big Oh delivers comprehensive mobile application and web development services to clients. | bigohtech.com |
Business activity
The main business activity of Big Oh Notation is information and communication. In detail, this covers publishing of computer operating systems, system software, application software, games, etc..
| Main activity group code | Main activity | Business activity code | Business activity | Share of turnover |
|---|---|---|---|---|
| J | Information and communication | J2 | Publishing of computer operating systems, system software, application software, games, etc. |
To see the full business activity and turnover split of Big Oh Notation Private Limited, buy the company report.
Financials of Big Oh Notation Private Limited
FY 2025 filings availableBig Oh Notation Private Limited reported revenue of ₹14.21 Cr (up 14% YoY) for FY 2025.
Compounded Annual Growth Rate (CAGR)
Revenue has grown at a compounded annual rate (CAGR) of 11% over three years, including 14% growth in the latest year. EBITDA rose 74% in the latest year. Three- and five-year figures are compounded annual growth rates (CAGR): the steady yearly rate that links the first and the last year. All are worked out from the filed statements.
Financial Statement Summary
| Metrics | FY 2024-25 | FY 2023-24 | FY 2022-23 | FY 2021-22 | FY 2020-21 |
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| EBITDA | ₹2.26 Cr | ||||
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| Net Profit (PAT) | ₹1.49 Cr | ||||
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Financial Ratios
| Metrics | FY 2024-25 | FY 2023-24 | FY 2022-23 | FY 2021-22 | FY 2020-21 |
|---|---|---|---|---|---|
| Profitability | |||||
| EBITDA Margin | 15.9% | ||||
| Net Profit Margin | 10.5% | ||||
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To see the full financial statements and ratios of Big Oh Notation Private Limited, buy the company report.
Board of directors of Big Oh Notation Private Limited
Big Oh Notation has 2 directors on record. No former directors are listed.
| Name | Designation | Appointment Date | Tenure | Status |
|---|---|---|---|---|
| Vijay Kumar Rustogi Also directs: Flair Agri Tech Private Limited | Director | 18 Feb 2021 | 5 Years 8 Months | Current |
| Imran Khan | Director | 08 Oct 2022 | 4 Years 1 Months | Current |
Peer comparison
Big Oh Notation Private Limited is compared with the 8 companies closest to it by revenue in the same principal business activity (publishing of computer operating systems, system software, application software, games, etc.), from the latest filed financials of each company.
| Company | Revenue | Net profit | Margin | Growth (1 yr) | Employees | Location |
|---|---|---|---|---|---|---|
| Cloud Bigdata Technologies Private Limited | ₹14.31 Cr (FY 2023) | 187.0% | Hyderabad, Telangana, India | |||
| Aditech Ict Private Limited | ₹14.27 Cr (FY 2025) | 12.0% | Navi Mumbai, Maharashtra, India | |||
| Nkorr Technologies Private Limited | ₹14.24 Cr (FY 2025) | 8.0% | Thiruvananthapuram, Kerala, India | |||
| Sirahu Technologies Private Limited | ₹14.21 Cr (FY 2022) | 33.0% | Chennai, Tamil Nadu, India | |||
| Big Oh Notation Private Limitedthis company | ₹14.21 Cr (FY 2025) | ₹1.49 Cr | 10.5% | 14.0% | Delhi, India | |
| Easyreach Solutions Private Limited | ₹14.15 Cr (FY 2025) | 132.0% | Mumbai, Maharashtra, India | |||
| Ect Cloud Solutions India Private Limited | ₹14.14 Cr (FY 2025) | 442.0% | Bengaluru, Karnataka, India | |||
| CK 12 Software and Technology Consulting India Private Limited | ₹14.13 Cr (FY 2024) | 11.0% | Bengaluru, Karnataka, India | |||
| Omnipayments Software Private Limited | ₹14.12 Cr (FY 2025) | 28.0% | Mumbai, Maharashtra, India |
To see the full peer comparison of Big Oh Notation Private Limited, buy the company report.
Auditor
Big Oh Notation Private Limited is audited by K.K. JOHARI AND CO. for the financial year 2023.
| Auditor firm | Financial year | Firm registration number |
|---|---|---|
| K.K. JOHARI AND CO. | FY 2023 | 005115N |
Shareholding
The shareholding of Big Oh Notation Private Limited is on record for FY 2021, split between promoters, domestic institutions, foreign institutions and public shareholders.
| Shareholder category | FY 2021 |
|---|---|
| Promoters | |
| Domestic institutional investors (DII) | |
| Foreign institutional investors (FII) | |
| Public |
To see the full shareholding pattern of Big Oh Notation Private Limited, buy the company report.
Charges & borrowings
| Date | Charge ID | Lender | Amount | Status | Modified or satisfied on |
|---|---|---|---|---|---|
| 12 Mar 2025 | 101068259 | Others | ₹28 Lakh | Open | |
| 11 Nov 2024 | 101034846 | Others | ₹1 Cr | Open |
Total charge records: 2 View all charges
Legal cases
Big Oh Notation Private Limited has 4 court cases on record: 4 filed by Big Oh Notation. 3 cases are pending and 1 is disposed.
Cases by court
| Court | Cases | Against the company | Pending |
|---|---|---|---|
| District courts | 4 | 0 | 3 |
Cases on record (4 of 4)
| Court | Type of case | Party | Status |
|---|---|---|---|
| District court, Gautam Buddha Nagar, Uttar Pradesh | Criminal case | Filed by the company against an individual | Pending |
| District court, Central, Delhi | Cheque dishonour complaint | Filed by the company against an individual | Pending |
| District court, Central, Delhi | Cheque dishonour complaint | Filed by the company against an individual | Pending |
| District court, Central, Delhi | Cheque dishonour complaint | Filed by the company against an individual | Disposed |
To see the full case history of Big Oh Notation Private Limited, buy the company report.
Case records are compiled from court listings and may lag the court's own records. A case filed against a company is not a finding against it.
MSME payment delays
No delayed payments to MSME suppliers are on our record for Big Oh Notation Private Limited; the supplier-wise MSME Form 1 check is in the company report Buy the company report.
GST
Big Oh Notation has 2 GST registrations: 2 active.
| GSTIN | State | Status | Registered on |
|---|---|---|---|
| 07AAJCB6434D1ZU | Delhi | Active | 03 Mar 2021 |
| 09AAJCB6434D1ZQ | Uttar Pradesh | Active | 09 Feb 2022 |
To see the full GST registrations and return filing status of Big Oh Notation Private Limited, buy the company report.
Recent activity
Big Oh Notation Private Limited has 2 board changes on record since 2021: 2 appointments. The latest: Imran Khan was appointed as Director on 08 Oct 2022.
Frequently asked questions
Big Oh Notation is an active private limited company based in Delhi, India. The company works in application development and software solutions, within the information technology industry. It was incorporated on 18 February 2021 (5+ years old) and is registered under CIN U72900DL2021PTC377209.
Big Oh Notation has 2 current directors:
- Vijay Kumar Rustogi - Director
- Imran Khan - Director
The latest financial statements of Big Oh Notation on record with the MCA are for the year ended 31 March 2025. Its last annual general meeting was held on 30 September 2025. Year-wise statements from FY 2021 are in the company report.
The GSTIN of Big Oh Notation is 07AAJCB6434D1ZU, registered in Delhi. The company has 2 GST registrations in all, of which 2 are active. Other active GSTINs include 09AAJCB6434D1ZQ (Uttar Pradesh).
The CIN (Corporate Identification Number) of Big Oh Notation is U72900DL2021PTC377209. It is issued by the Ministry of Corporate Affairs under the Companies Act, 2013, and uniquely identifies the company in India.
Big Oh Notation has 4 court cases on record: 4 filed by the company. 3 are pending.
Big Oh Notation was incorporated on 18 February 2021, making it 5+ years old. It is registered with the Registrar of Companies, Delhi.
The peers of Big Oh Notation by revenue are Cloud Bigdata Technologies Private Limited, Aditech Ict Private Limited, Nkorr Technologies Private Limited, Sirahu Technologies Private Limited, Easyreach Solutions Private Limited and 3 more, all in the same principal business activity (publishing of computer operating systems, system software, application software, games, etc.).
Imran Khan was appointed as Director on 08 Oct 2022. Vijay Kumar Rustogi was appointed as Director on 18 Feb 2021.
Big Oh Notation can be reached through the website bigohtech.com. Its registered office is in Delhi, India.
The registered office of Big Oh Notation is at Flat No. 805 Type – A 8th Floor Pocket – B Motia Khan Pahar Ganj, Delhi, India – 110055.
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