Cash flow conversion remains inconsistent, as evidenced by the FCF margin swinging from -32.3% in 2025Q3 to a positive 32.8% in 2026Q1 due to working capital fluctuations.
| Metric | TTM | Dec'25 | Dec'24 | Dec'23 | Dec'22 | Dec'21 | Dec'20 | Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 | Dec'08 | Dec'07 | Dec'06 | Dec'05 | Dec'04 | Dec'03 | Dec'02 | Dec'01 | Dec'00 | Dec'99 | Dec'98 | Dec'97 | Dec'96 |
|---|
| Cash from Operations | 4.47M | 2.48M | 357.9K | -4.67M | -1.54M | 954.17K | 1.32M | 233.51K | -373.4K | 1.18M | -323.9K | 2.9M | 302.36K | 1.1M | 344.39K | -37.31K | -808.61K | -109.67K | 53.14K | 349.56K | 1.36M | 764.78K | 1.36M | 1.4M | 1.9M | 906K | 81.5K | 679.7K | 600K | 100K | -100K |
| Operating CF Margin % | - | 8.95% | 1.35% | -26.75% | -8.31% | 4.96% | 8.58% | 1.7% | -3.4% | 11.27% | -3.39% | 28.35% | 3.98% | 18.29% | 6.39% | -0.73% | -18.44% | -2.43% | 1.15% | 5.76% | 28.28% | 15.35% | 36.74% | 41.82% | 30.69% | 13.57% | 1.45% | 13.85% | 13.33% | 2.17% | -2.27% |
| Operating CF Growth % | 16133.16% | 591.61% | 107.66% | -202.76% | -261.8% | -27.47% | 463.39% | 162.54% | -131.76% | 463.02% | -111.17% | 859.19% | -72.48% | 219.02% | 1022.93% | 95.39% | -637.35% | -306.38% | -84.8% | -74.26% | 77.57% | -43.69% | -3.27% | -26.05% | 109.53% | 1011.59% | -88.01% | 13.28% | 500% | 200% | -133.33% |
| Net Income | -545.4K | -1.04M | -2.16M | -5.77M | -2.49M | -78.29K | -1.02M | -1.3M | -2.32M | -168.15K | 508.45K | 1.21M | -167.16K | 117.39K | 89.51K | -409.51K | -384.68K | -216.49K | -468.56K | 662.14K | 143.52K | 707.78K | 143.52K | 411.22K | 886.24K | 420K | 2.22M | 550.84K | -100K | 300K | -100K |
| Depreciation & Amortization | 2.58M | 2.73M | 2.69M | 2.72M | 2.49M | 2.46M | 2.35M | 2.27M | 1.52M | 904.43K | 802.38K | 529.26K | 448.92K | 417.2K | 402.52K | 418.37K | 419.51K | 424.44K | 399.1K | 788.9K | 278.52K | 643.62K | 278.52K | 256.27K | 236.77K | 177K | 133.16K | 101.54K | 100K | 100K | 100K |
| Stock-Based Compensation | 381.61K | 295.87K | 326K | 368.87K | 266.24K | 144.31K | 253.13K | 313.14K | 344.02K | 199.78K | 67.4K | 23.22K | 30K | 31.36K | 35.98K | 38.17K | 29.51K | 94.06K | 55.28K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Deferred Taxes | 0 | 0 | 0 | 0 | 0 | 30.96K | -14.63K | 24.68K | 462.31K | -284.81K | 236.29K | 821.47K | -88.59K | 87.17K | 94.37K | -302.5K | -299.17K | -213.35K | -108.14K | 435.2K | -62.12K | 140K | 6.49K | 280.67K | 589.48K | 255K | -1.75M | 0 | 0 | 0 | 0 |
| Other Non-Cash Items | 2.58M | 2.54M | -91.76K | 260.82K | 28.8K | 18.56K | -780.35K | 19.45K | -681.44K | -8.36K | 37.51K | -3.98K | 4.52K | 35.18K | 12.27K | 10.82K | 575 | 29.86K | 51.9K | 87.22K | 68.61K | 5.21K | 2.89K | 33.7K | -4.79K | -2K | 0 | 97.13K | 100K | -100K | 0 |
| Working Capital Changes | -527.87K | -2.05M | -406.52K | -2.27M | -1.83M | -1.62M | 532.26K | -1.1M | 302.66K | 532.92K | -1.98M | 317.03K | 74.67K | 410.36K | -290.26K | 207.33K | -574.36K | -228.19K | 123.55K | -1.63M | 926.61K | -731.84K | 926.61K | 422.08K | 190.68K | 56K | -527.54K | -69.81K | 500K | -200K | -100K |
| Change in Receivables | 652.01K | 352.12K | -1.59M | 0 | 935.63K | -897.43K | -159.64K | -704.87K | 411.72K | -330.31K | -277.52K | 251.19K | -373.88K | -20.06K | -227.86K | 205.05K | -6.47M | -5.71M | -6.1M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Change in Inventory | -1.32M | -2.15M | 699.22K | 0 | -2.95M | -997.46K | 425.74K | -186.59K | -281.94K | 77.17K | -1.14M | 75.55K | 260.75K | 442.49K | 17.46K | -65.45K | -513.63K | -490.99K | -7.79K | 200.57K | 6.84K | -36.42K | 6.84K | 115.69K | -256.33K | -31K | 18.21K | -44.71K | 0 | 200K | 0 |
| Change in Payables | 212.59K | 0 | 362.61K | 157K | 342 | 245.76M | 299.88M | -190.21K | 196.98K | 448.64M | -182.51M | 60.36M | 178.56M | -95.5K | 100.05K | 59.48K | -26.81K | 29.98K | -16.7K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Cash from Investing | -1.05M | -1.21M | -461.23K | -1.89M | -3.96M | -1.6M | -2.57M | -3.4M | -1.79M | -12.27M | -4.42M | -4.62M | -1.54M | -1.34M | 1.66M | -1.19M | 266.45K | -215.44K | -45.85K | -481.37K | -3.16M | -1.38M | -3.16M | -405.52K | -1.03M | -963K | -309.73K | -394.62K | 0 | -100K | -500K |
| Capital Expenditures | -1.1M | -1.25M | -465.73K | -1.89M | -3.98M | -2.61M | -4.07M | -1.39M | -2.03M | -17.76M | -3.59M | -2.72M | -1.54M | -597.7K | -275.39K | -243.74K | -116.55K | -459.55K | -410.62K | -1.53M | -1.3M | -185.13K | -338.23K | -304.25K | -250K | -896K | -274.73K | -131.59K | -100K | -100K | -400K |
| CapEx % of Revenue | 3.67% | 4.52% | 1.76% | 10.83% | 21.41% | 13.56% | 26.55% | 10.14% | 18.48% | 170.26% | 37.58% | 26.58% | 20.21% | 9.95% | 5.11% | 4.77% | 2.66% | 10.19% | 8.86% | 25.17% | 27.14% | 3.72% | 9.15% | 9.06% | 4.04% | 13.42% | 4.87% | 2.68% | 2.22% | 2.17% | 9.09% |
| Acquisitions | 39.23K | 0 | 0 | 0 | 11K | 15.29K | 45.6K | -8.91K | -14.08K | -8.66K | -368.22K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -965K | 0 | 0 | 0 | -35K | -250K | 0 | 0 | 0 |
| Investments | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Other Investing | 6.9K | 36.13K | 4.5K | 2.47K | 11K | 15.29K | 45.6K | 450K | 250K | 45K | 30.94K | 66.22K | 0 | -745K | 1.94M | 0 | 0 | 0 | 0 | 0 | 4K | 6K | 4K | 0 | 3K | -67K | 0 | -13.02K | 100K | 0 | -100K |
| Cash from Financing | -1.21M | -1.21M | 2.88M | 1.75M | 1.11M | 3.88M | 1.91M | 6.94M | 889.62K | 9.75M | 8.32M | 2.44M | -187.16K | -159.3K | -114.79K | 614.58K | 965.65K | 100.67K | 2 | -24.41K | 146.29K | 114.27K | 146.29K | 2.36K | -391.46K | 45K | 299.68K | -298 | -100K | 200K | 100K |
| Debt Issued (Net) | -1.51M | -1.48M | -1.47M | 1.81M | 1.1M | -368.27K | 1.96M | -1.36M | 795.33K | 5.99M | -135.84K | 2.33M | -190.31K | -181.44K | -172.85K | 454.77K | 986.14K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -414.18K | -20.48K | -18.69K | -17.26K | -100K | -200K | 0 |
| Equity Issued (Net) | 329.9K | 349.33K | 4.36M | 0 | 0 | 4.23M | 0 | 0 | 0 | 0 | 8.47M | 0 | 0 | 0 | 0 | 0 | 6K | 0 | 0 | -27.24K | 146.29K | 114.27K | 146.29K | 2.36K | 22.72K | 65.86K | 318.37K | 16.96K | 0 | 200K | 0 |
| Dividends Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Share Repurchases | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -65.45K | 0 | 0 | 0 | -12.27K | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Other Financing | -24.9K | -82.51K | -5.04K | -62.77K | 11.36K | 13.96K | -53.13K | 8.3M | 94.28K | 3.75M | -14.76K | 111.79K | 3.15K | 22.15K | 58.06K | 159.81K | -26.49K | 100.67K | 2 | 2.83K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 200K | 100K |
| Net Change in Cash | 2.21M | 48.6K | 2.78M | -4.81M | -4.39M | 3.24M | 656.64K | 3.77M | -1.28M | -1.35M | 3.58M | 723.3K | -1.42M | -403.33K | 1.89M | -617.47K | 423.5K | -224.44K | 7.29K | -156.22K | -1.66M | -500.23K | -1.66M | 1M | 472.88K | -12K | 71.46K | 284.78K | 500K | 200K | -500K |
| Free Cash Flow | 3.38M | 1.22M | -107.82K | -6.57M | -5.52M | -1.65M | -2.76M | -1.16M | -2.4M | -16.58M | -3.91M | 181.05K | -1.23M | 500.96K | 69K | -281.05K | -925.16K | -569.21K | -357.49K | -1.18M | 54.81K | 579.65K | 1.02M | 1.1M | 1.65M | 10K | -193.22K | 548.1K | 500K | 0 | -500K |
| FCF Margin % | 11.28% | 4.43% | -0.41% | -37.59% | -29.72% | -8.6% | -17.97% | -8.44% | -21.88% | -158.99% | -40.97% | 1.77% | -16.23% | 8.34% | 1.28% | -5.5% | -21.09% | -12.62% | -7.71% | -19.41% | 1.14% | 11.63% | 27.59% | 32.75% | 26.65% | 0.15% | -3.43% | 11.16% | 11.11% | - | -11.36% |
| FCF Growth % | 327.97% | 1236% | 98.36% | -18.98% | -233.59% | 39.99% | -138.09% | 51.82% | 85.51% | -324.12% | -2259.8% | 114.68% | -346.16% | 626.09% | 124.55% | 69.62% | -62.53% | -59.23% | 69.66% | -2249.85% | -90.54% | -43.16% | -7.26% | -33.29% | 16383.81% | 105.18% | -135.25% | 9.62% | - | 100% | -350% |
| FCF per Share | 0.37 | 0.14 | -0.01 | -0.85 | -0.71 | -0.22 | -0.38 | -0.17 | -0.44 | -3.35 | -0.90 | 0.06 | -0.41 | 0.16 | 0.02 | -0.09 | -0.31 | -0.19 | -0.12 | -0.39 | 0.02 | 0.19 | 0.34 | 0.39 | 0.60 | 0.00 | -0.07 | 0.22 | 0.21 | - | -0.18 |
| FCF Conversion (FCF/Net Income) | -6.19x | -2.38x | -0.17x | 0.81x | 0.62x | -12.19x | -1.29x | -0.18x | 0.16x | -7.00x | -0.64x | 2.39x | -1.81x | 9.36x | 3.85x | 0.09x | 2.10x | 0.51x | -0.11x | 0.53x | 2.10x | 1.08x | 9.46x | 3.41x | 2.14x | 2.16x | 0.04x | 1.23x | -6.00x | 0.33x | 1.00x |
| Interest Paid | 325.16K | 443.02K | 528.91K | 0 | 338.52K | 308.68K | 481.41K | 420.96K | 403.54K | 186.54K | 153.09K | 77.16K | 58.41K | 0 | 75.68K | 78.74K | 20K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Taxes Paid | 486 | 10.69K | 7.29K | 0 | 4.92K | 5.11K | 4.58K | 3.57K | 4.22K | 6.07K | 123.58K | 3.13K | 252 | 0 | 708 | 510 | 144 | 360.78K | 147.73K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Regulatory and manufacturing dependency
According to quarterly cash flow data, ImmuCell's OCF/NI ratio has fluctuated wildly, reaching a high of 8.46 in 2025Q3 and dipping to -0.17 in 2025Q4, which highlights a significant disconnect between accounting net income and the actual cash generated by core operations.
The extreme variance in the conversion ratio suggests that net income is heavily influenced by non-cash items and timing differences rather than consistent operational performance. Investors should monitor whether this volatility stems from biological asset valuation adjustments or lumpy revenue recognition patterns that mask the underlying cash-generating capability of the First Defense franchise.
As reported in financial statements, ImmuCell's FCF margin has swung from a negative 32.3% in 2025Q3 to a positive 32.8% in 2026Q1, indicating that the company's ability to self-fund its R&D pipeline remains highly sensitive to quarterly production yields and distributor purchasing cycles.
The erratic FCF trajectory underscores the difficulty of maintaining a steady cash position while managing a high-fixed-cost biological manufacturing facility. This inconsistency suggests that the company may struggle to achieve sustained self-funding status until the Re-Tain pipeline transitions from a cash-consuming R&D project to a commercial revenue contributor.
Based on reported figures, working capital changes have been a primary driver of cash flow volatility, with a $946.2K inflow in 2026Q1 contrasting sharply with a $1.7M outflow in 2025Q3, reflecting the inherent challenges of managing inventory in a biological production environment.
The significant swings in working capital suggest that inventory management and the timing of receivables are critical to the company's short-term liquidity. Analysts should investigate whether these fluctuations are indicative of supply chain bottlenecks or if they represent strategic inventory builds that may lead to future obsolescence risks.
Data indicates that ImmuCell's CapEx/Revenue ratio has remained modest, peaking at 10.8% in 2025Q3 but generally hovering below 5%, which suggests that the company's current manufacturing infrastructure is not overly capital-intensive relative to its top-line performance.
While the low capital intensity is a positive signal for potential margin expansion, it also implies that the company may be under-investing in capacity or relying on legacy equipment that could require significant future upgrades. Investors should monitor whether this level of investment is sufficient to support the anticipated scale-up of the Re-Tain product line.
Quick answers to the most common questions about buying ICCC stock.
ImmuCell Corporation (ICCC) generated $2.5M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
ImmuCell Corporation (ICCC) generated $1.2M in free cash flow in 2025. Free cash flow is the cash left over after capital expenditures, which can be used to pay dividends, repurchase shares, or pay down debt.
ImmuCell Corporation (ICCC) spent $1.3M on capital expenditures in 2025. CapEx represents the cash invested in physical assets like property, plant, and equipment to maintain or grow the business.