Protagenic Therapeutics, Inc. (PTIX) Cash Flow Statement
Where PTIX’s cash came from and went, 2025
December 31, 2025 · U.S. dollars- Cash from operations
- −$4.1M
- Capital expenditures
- $3
- Free cash flow
- −$4.1M
- Returned to shareholders
- —
- Change in cash
- $4.5M cash at year-end $2.2M
Drawn to scale: where the cash came from and how it was used. Hover for values.
PTIX operating cash flow, capex and free cash flow
PTIX cash flow trends, 2016–2025
| Metric | Trend | Then | Latest | Change |
|---|---|---|---|---|
| Operating cash flow | −$1.1M2016 | −$4.1M2025 | — | |
| Capital expenditures | $02016 | $32025 | — | |
| Free cash flow | −$1.1M2016 | −$4.1M2025 | — | |
| Stock-based compensation | $546,1342016 | $562,9512025 | +0.3%/yr | |
| Dividends paid | $02016 | $02018 | — | |
| Share buybacks (net) | $02016 | $02018 | — |
Change is the average annual growth (CAGR) or the difference between the first and latest year.
PTIX cash flow by activity
PTIX net income vs operating cash flow
Operating cash flow above net income usually means earnings are backed by cash (depreciation and stock-based pay are non-cash expenses).
PTIX cash flow statement
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Operating activities | ||||||||||
| Net income | −$5.2M | −$5.5M | −$5.0M | −$3.6M | −$4.5M | −$2.5M | −$1.8M | −$2.6M | −$2.3M | −$2.3M |
| Depreciation & amortization | $37,714 | $50,286 | $28,218 | $30 | $427 | $286 | $339 | $347 | $148 | $534 |
| Stock-based compensation | $562,951 | $923,139 | $666,828 | $864,681 | $1.5M | $1.7M | $797,761 | $1.1M | $888,281 | $546,134 |
| Change in working capital | $123,402 | $467,543 | −$114,412 | $540,132 | −$140,389 | −$361,431 | $702,202 | $109,731 | −$16,866 | −$1,937 |
| Other non-cash items | $291,838 | −$132,141 | $716,087 | $156,848 | $345,526 | −$93,653 | −$237,381 | $246,194 | $7,984 | $590,776 |
| Cash from operating activities | −$4.1M | −$4.2M | −$3.7M | −$2.0M | −$2.8M | −$1.3M | −$487,990 | −$1.1M | −$1.4M | −$1.1M |
| Investing activities | ||||||||||
| Capital expenditures | −$3 | $0 | −$149,775 | −$1,805 | −$4 | $0 | $0 | $0 | $0 | $0 |
| Investments (net) | — | $2.8M | $2.7M | $1.6M | −$9.9M | −$9.9M | $250,000 | $1.0M | −$1.3M | $0 |
| Acquisitions & other investing | $943,183 | $0 | $2.3M | $1,805 | $4 | $0 | $0 | $0 | $0 | −$1.3M |
| Cash from investing activities | $943,180 | $2.8M | $4.8M | $1.6M | −$9.9M | −$9.9M | $250,000 | $1.0M | −$1.3M | −$1.3M |
| Financing activities | ||||||||||
| Dividends paid | — | — | — | — | — | — | — | $0 | $0 | $0 |
| Share repurchases & issuance (net) | — | — | — | — | — | — | — | $0 | $0 | $87 |
| Net borrowing (repayment) | — | — | — | $0 | $0 | $1.3M | $670,000 | $670,000 | $670,000 | $19,000 |
| Shares issued | $0 | $2.0M | $0 | $0 | $11.7M | $0 | $0 | $0 | $0 | $0 |
| Other financing | $4.5M | $0 | $0 | $0 | $869,625 | −$104,090 | $0 | $0 | $0 | $4.3M |
| Cash from financing activities | $4.5M | $2.0M | $0 | $0 | $12.6M | $1.2M | $670,000 | $670,000 | $670,000 | $4.3M |
| Summary | ||||||||||
| Net change in cash | $4.5M | $550,576 | $1.1M | −$325,982 | −$129,920 | −$127,532 | $436,137 | −$37,201 | −$2.7M | $3.1M |
| Cash at end of period | $2.2M | $1.8M | $1.3M | $215,189 | $541,171 | $671,091 | $798,623 | $362,486 | $399,687 | $3.1M |
| Free cash flow | −$4.1M | −$4.2M | −$3.9M | −$2.0M | −$2.8M | −$1.3M | −$487,990 | −$1.1M | −$1.4M | −$1.1M |
| Jun '26 | Dec '25 | Sep '25 | Jun '25 | Mar '25 | Dec '24 | Sep '24 | Jun '24 | Mar '24 | Dec '23 | Sep '23 | Jun '23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating activities | ||||||||||||
| Net income | −$963,616 | $2.2M | −$4.5M | −$5.1M | −$1.4M | −$1.6M | −$640,785 | −$1.6M | −$1.7M | −$1.7M | −$1.4M | −$1.2M |
| Depreciation & amortization | $8,312 | $12,571 | $12,572 | $12,571 | $12,572 | $12,571 | $12,572 | $12,571 | $12,572 | $26,618 | $1,419 | $91 |
| Stock-based compensation | $67,012 | $95,942 | −$5,019 | $125,127 | $236,014 | $245,436 | $250,403 | $265,439 | $161,861 | $166,707 | $166,707 | $166,707 |
| Change in working capital | $856,921 | $283,092 | −$440,995 | $448,333 | $123,402 | $556,354 | $192,149 | −$171,834 | −$109,126 | −$176,575 | $545,105 | −$633,074 |
| Other non-cash items | −$912,927 | −$3.0M | $3.4M | $3.3M | $0 | −$80,409 | $0 | −$51,534 | −$198 | $515,000 | $27,629 | $144,125 |
| Cash from operating activities | −$944,298 | −$410,421 | −$1.5M | −$1.2M | −$1.1M | −$819,791 | −$185,661 | −$1.6M | −$1.7M | −$1.1M | −$655,766 | −$1.5M |
| Investing activities | ||||||||||||
| Capital expenditures | −$3,293 | −$6 | −$3 | −$3 | −$3 | −$1 | $0 | $0 | −$5 | −$93,969 | −$55,806 | $0 |
| Investments (net) | — | — | $0 | $943,180 | $0 | $0 | $0 | $1.6M | $1.2M | $2.3M | $590,723 | $1.6M |
| Acquisitions & other investing | −$310,004 | −$943,174 | $943,183 | $3 | — | — | — | $0 | $5 | — | $55,806 | $0 |
| Cash from investing activities | −$313,297 | −$943,180 | $943,180 | $943,180 | — | — | — | $1.6M | $1.2M | — | $590,723 | $1.6M |
| Financing activities | ||||||||||||
| Net borrowing (repayment) | — | $0 | −$15,409 | $77,756 | — | — | — | — | — | — | — | — |
| Shares issued | $0 | $0 | $0 | $395,474 | $102,519 | $1.6M | $316,959 | $44,531 | $0 | $0 | $0 | $0 |
| Other financing | −$533,898 | −$2 | $2 | $3.9M | $0 | $0 | $0 | $0 | $10 | — | −$10 | — |
| Cash from financing activities | −$533,898 | −$2 | −$15,407 | $4.4M | $102,519 | $1.6M | $316,959 | $44,531 | $10 | — | −$10 | — |
| Summary | ||||||||||||
| Net change in cash | −$943,193 | −$509,805 | $1.8M | $4.1M | −$965,509 | $782,664 | $131,209 | $92,818 | −$456,115 | $1.1M | −$66,113 | $80,944 |
| Cash at end of period | $565,985 | $2.2M | $2.7M | $4.1M | $872,960 | $1.8M | $1.1M | $924,596 | $831,778 | $1.3M | $153,322 | $219,435 |
| Free cash flow | −$944,298 | −$410,427 | −$1.5M | −$1.2M | −$1.1M | −$819,790 | −$185,661 | −$1.6M | −$1.7M | −$1.2M | −$711,572 | −$1.5M |
| Free cash flow margin | — | — | — | — | — | — | −738.4% | — | −51,849.5% | — | — | — |
| Capex / revenue | — | — | — | — | — | — | 0.0% | — | 0.2% | — | — | — |
| Operating cash flow / net income | — | −0.19 | — | — | — | — | — | — | — | — | — | — |
Negative numbers are cash paid out. Quarterly columns are labeled by the month the quarter ended. Figures in U.S. dollars as reported; data from EODHD.
PTIX cash generation
In fiscal 2025 (ended December 31, 2025), Protagenic Therapeutics generated -$4.1 million of cash from operations and spent $0.0 million on capital expenditures, leaving free cash flow of -$4.1 million. Cash and equivalents rose by $4.5 million over the year.
Related: PTIX income statement, PTIX balance sheet. See the PTIX stock overview for the latest quote and news.
PTIX cash flow FAQ
What is Protagenic Therapeutics's free cash flow?
Protagenic Therapeutics's free cash flow was -$4.1 million in fiscal 2025: -$4.1 million of operating cash flow minus $0.0 million of capital expenditures It was -$4.2 million a year earlier..
How much cash does Protagenic Therapeutics generate from operations?
Protagenic Therapeutics generated -$4.1 million of cash from operating activities in fiscal 2025.
How much does Protagenic Therapeutics spend on capital expenditures?
Protagenic Therapeutics spent $0.0 million on capital expenditures in fiscal 2025.