# EDGAR Filing Document

**Accession Number:** 0001789769
**File Stem:** 0001789769-26-000045
**Filing Date:** 2026-5
**Character Count:** 114618
**Document Hash:** 945558100bd83824f4d5ca6a6b1ef75a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001789769-26-000045.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0001789769-26-000045

**CONFORMED SUBMISSION TYPE**: 10-Q

**PUBLIC DOCUMENT COUNT**: 71

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Instil Bio, Inc.
- **CENTRAL INDEX KEY:** 0001789769
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 832072195
- **STATE OF INCORPORATION:** NY
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40215
- **FILM NUMBER:** 26982586

**BUSINESS ADDRESS:**
- **STREET 1:** 3963 MAPLE AVENUE
- **STREET 2:** SUITE 350
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75219
- **BUSINESS PHONE:** (972) 499-3350

**MAIL ADDRESS:**
- **STREET 1:** 3963 MAPLE AVENUE
- **STREET 2:** SUITE 350
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75219

?xml version='1.0' encoding='ASCII'? til-20260331

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 10-Q**

☒ **QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the quarterly period ended March 31, 2026**

**OR**

☐ **TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from ________ to ________**

**Commission file number 001-40215**

**Instil Bio, Inc.**

**(Exact name of registrant as specified in its charter)**

---

| | |
|:---|:---|
| **Delaware** | **83-2072195** |
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) |
| **3963 Maple Avenue, Suite 350**<br>**Dallas, Texas** | **75219**<br>(Zip Code) |
| (Address of Principal Executive Offices) | |

---

**(972) 499-3350**

Registrant's telephone number, including area code

**Not Applicable**

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Stock, $0.000001 par value per share | TIL | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports); and (2) has been subject to such filing requirements for the past 90 days.&nbsp;&nbsp;&nbsp;&nbsp;Yes ☒&nbsp;&nbsp;&nbsp;&nbsp;No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit files). &nbsp;&nbsp;&nbsp;&nbsp;Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☐ |
| Non-accelerated filer  | ☒ | Smaller reporting company | ☒ |
| | | Emerging growth company | ☒ |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. &nbsp;&nbsp;&nbsp;&nbsp; ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date:

---

| | |
|:---|:---|
| <u>Class of Common Stock</u> | <u>Outstanding at</u> |
| 6,781,976 shares of Common Stock, $0.000001 par value per share | May 13, 2026 |

---

------

**TABLE OF CONTENTS**

---

| | |
|:---|:---|
| | **<u>Page</u>**  |
| <u>[Part I. Financial Information](#i9805e0c0990a4ff9baca7d66dbc76db4_10)</u> | <u>[2](#i9805e0c0990a4ff9baca7d66dbc76db4_10)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 1. Financial Statements (Unaudited)](#i9805e0c0990a4ff9baca7d66dbc76db4_13)</u>  | <u>[2](#i9805e0c0990a4ff9baca7d66dbc76db4_13)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>[Condensed Consolidated Balance Sheets](#i9805e0c0990a4ff9baca7d66dbc76db4_16)</u> | <u>[2](#i9805e0c0990a4ff9baca7d66dbc76db4_16)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>[Condensed Consolidated Statements of Operations and Comprehensive Loss](#i9805e0c0990a4ff9baca7d66dbc76db4_19)</u> | <u>[3](#i9805e0c0990a4ff9baca7d66dbc76db4_19)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>[Condensed Consolidated Statements of Stockholders' Equity](#i9805e0c0990a4ff9baca7d66dbc76db4_22)</u> | <u>[4](#i9805e0c0990a4ff9baca7d66dbc76db4_22)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>[Condensed Consolidated Statements of Cash Flows](#i9805e0c0990a4ff9baca7d66dbc76db4_25)</u> | <u>[5](#i9805e0c0990a4ff9baca7d66dbc76db4_25)</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<u>[Notes to Condensed Consolidated Financial Statements](#i9805e0c0990a4ff9baca7d66dbc76db4_28)</u> | <u>[6](#i9805e0c0990a4ff9baca7d66dbc76db4_28)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations](#i9805e0c0990a4ff9baca7d66dbc76db4_70)</u> | <u>[19](#i9805e0c0990a4ff9baca7d66dbc76db4_70)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 3. Quantitative and Qualitative Disclosures About Market Risk](#i9805e0c0990a4ff9baca7d66dbc76db4_76)</u> | <u>[28](#i9805e0c0990a4ff9baca7d66dbc76db4_76)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 4. Controls and Procedures](#i9805e0c0990a4ff9baca7d66dbc76db4_79)</u> | <u>[28](#i9805e0c0990a4ff9baca7d66dbc76db4_79)</u> |
| <u>[Part II. Other Information](#i9805e0c0990a4ff9baca7d66dbc76db4_82)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_82)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 1. Legal Proceedings](#i9805e0c0990a4ff9baca7d66dbc76db4_85)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_85)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 1A. Risk Factors](#i9805e0c0990a4ff9baca7d66dbc76db4_88)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_88)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 2. Unregistered Sales of Equity Securities and Use of Proceeds](#i9805e0c0990a4ff9baca7d66dbc76db4_91)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_91)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 3. Defaults Upon Senior Securities](#i9805e0c0990a4ff9baca7d66dbc76db4_94)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_94)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 4. Mine Safety Disclosures](#i9805e0c0990a4ff9baca7d66dbc76db4_97)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_97)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 5. Other Information](#i9805e0c0990a4ff9baca7d66dbc76db4_100)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_100)</u> |
| &nbsp;&nbsp;&nbsp;<u>[Item 6. Exhibits](#i9805e0c0990a4ff9baca7d66dbc76db4_103)</u> | <u>[29](#i9805e0c0990a4ff9baca7d66dbc76db4_103)</u> |
| <u>[Signatures](#i9805e0c0990a4ff9baca7d66dbc76db4_106)</u> | <u>[31](#i9805e0c0990a4ff9baca7d66dbc76db4_106)</u> |

---

------

**Part I. Financial Information**

**Item 1. Financial Statements (Unaudited)**

**INSTIL BIO, INC.**

**CONDENSED CONSOLIDATED BALANCE SHEETS**

**(in thousands, except share and per share amounts)**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| **ASSETS** | | |
| Current assets: |  |  |
| &nbsp;&nbsp;&nbsp;Cash and cash equivalents | $5022 | $6638 |
| &nbsp;&nbsp;&nbsp;Restricted cash | 123 | 166 |
| &nbsp;&nbsp;&nbsp;Marketable securities | 69549 | 69491 |
| &nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets | 1512 | 3038 |
| &nbsp;&nbsp;&nbsp;Assets held for sale | 112096 | 112096 |
| Total current assets | 188302 | 191429 |
| Property, plant and equipment, net | 112 | 126 |
| Operating lease right-of-use assets | 60 | 238 |
| Accrued rent receivable | 7968 | 7664 |
| Other long-term assets | 3986 | 4066 |
| Total assets | $200428 | $203523 |
| **LIABILITIES AND STOCKHOLDERS' EQUITY** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;Accounts payable | $793 | $779 |
| &nbsp;&nbsp;&nbsp;Accrued expenses and other current liabilities | 3930 | 4064 |
| Total current liabilities | 4723 | 4843 |
| Loan payable | 84999 | 84806 |
| Other long-term liabilities | 8 | 8 |
| Total liabilities | 89730 | 89657 |
| Commitments and contingencies (Note 8) |  |  |
| Stockholders' equity: |  |  |
| &nbsp;&nbsp;&nbsp;Preferred stock, par value $0.000001 per share; 10,000,000 shares authorized; zero shares issued and outstanding as of March 31, 2026, and December 31, 2025 |  |  |
| &nbsp;&nbsp;&nbsp;Common stock, par value $0.000001 per share; 300,000,000 shares authorized; 6,781,976 shares issued and outstanding as of March 31, 2026, and December 31, 2025 |  |  |
| &nbsp;&nbsp;&nbsp;Additional paid-in capital | 841922 | 840937 |
| &nbsp;&nbsp;&nbsp;Accumulated other comprehensive loss | (532) | (583) |
| &nbsp;&nbsp;&nbsp;Accumulated deficit | (730692) | (726488) |
| Total stockholders' equity | 110698 | 113866 |
| Total liabilities and stockholders' equity | $200428 | $203523 |

---

*The accompanying notes are an integral part of these condensed consolidated financial statements.*

------

**INSTIL BIO, INC.**

**CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS**

**(in thousands, except share and per share amounts)**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended<br>March 31,** | **Three Months Ended<br>March 31,** |
| | **2026** | **2025** |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Research and development | $669 | $5371 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 5349 | 9109 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Restructuring and impairment charges | 992 | 16082 |
| Total operating expenses | 7010 | 30562 |
| Loss from operations | (7010) | (30562) |
| Interest income | 678 | 1175 |
| Interest expense | (1552) | (1098) |
| Other rental income | 2242 | 2242 |
| Gain on contract termination | 1620 |  |
| Other (expense) income, net | (182) | 43 |
| Net loss | (4204) | (28200) |
| Other comprehensive loss: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Foreign currency translation | 131 | (159) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unrealized loss on available-for-sale securities, net | (80) | (64) |
| Net comprehensive loss | $(4153) | $(28423) |
| Net loss per share, basic and diluted | $(0.62) | $(4.32) |
| Weighted-average shares used in computing net loss per share, basic and diluted | 6781976 | 6532658 |

---

*The accompanying notes are an integral part of these condensed consolidated financial stateme*nts.

------

**INSTIL BIO, INC.** 

**CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY**

**(in thousands, except share amounts)**

**(Unaudited)**

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Common Stock** | **Common Stock** | **Additional Paid-in Capital** | | **Accumulated Deficit** | **Total Stockholders' Equity** |
| | **Shares** | **Amount** | **Additional Paid-in Capital** | **Accumulated Other Comprehensive**<br>**Loss** | **Accumulated Deficit** | **Total Stockholders' Equity** |
| Balance - December 31, 2025 | 6781976 | $— | $840937 | $(583) | $(726488) | $113866 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation |  |  | 985 |  |  | 985 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net loss |  |  |  |  | (4204) | (4204) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other comprehensive income |  |  |  | 51 |  | 51 |
| Balance - March 31, 2026 | 6781976 | $— | $841922 | $(532) | $(730692) | $110698 |

---

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Common Stock**  | **Common Stock**  | **Additional Paid-in Capital** | | **Accumulated Deficit** | **Total Stockholders' Equity** |
| | **Shares** | **Amount** | **Additional Paid-in Capital** | **Accumulated Other Comprehensive**<br>**Loss** | **Accumulated Deficit** | **Total Stockholders' Equity** |
| Balance - December 31, 2024 | 6525887 | $— | $824780 | $(228) | $(655116) | $169436 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shares of common stock issued upon exercise of stock options | 33040 |  | 404 |  |  | 404 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation |  |  | 3495 |  |  | 3495 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net loss |  |  |  |  | (28200) | (28200) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other comprehensive loss |  |  |  | (223) |  | (223) |
| Balance - March 31, 2025 | 6558927 | $— | $828679 | $(451) | $(683316) | $144912 |

---

*The accompanying notes are an integral part of these condensed consolidated financial statements.*

------

**INSTIL BIO, INC.**

**CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS**

**(in thousands)**

**(Unaudited)**

---

| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| **Cash flows from operating activities:** |  |  |
| &nbsp;&nbsp;&nbsp;Net loss | $(4204) | $(28200) |
| &nbsp;&nbsp;&nbsp;Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation | 985 | 3495 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Non-cash lease expense | 71 | 71 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Foreign exchange remeasurement loss (gain) | 129 | (223) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Impairment of property, plant and equipment |  | 16569 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Depreciation | 12 | 498 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Amortization (accretion) on invested securities | 178 | (236) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Non-cash interest expense | 193 | 212 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loss on disposals of property and equipment | 2 |  |
| &nbsp;&nbsp;&nbsp;Changes in operating assets and liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets | 1526 | 6482 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other long-term assets | 80 | 80 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accrued rent receivable | (304) | (1392) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable | 17 | (376) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operating lease liabilities | (76) | (163) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accrued expenses and other current liabilities | 54 | (1012) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash used in operating activities | (1337) | (4195) |
| **Cash flows from investing activities:** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Purchase of marketable securities | (22317) | (38194) |
| &nbsp;&nbsp;&nbsp;&nbsp;Maturities of marketable securities | 22000 | 47400 |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash received from held for sale assets |  | 405 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash (used in) provided by investing activities | (317) | 9611 |
| **Cash flows from financing activities:** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from exercise of stock options |  | 404 |
| &nbsp;&nbsp;&nbsp;&nbsp;Loan agreement closing costs |  | (172) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash provided by financing activities |  | 232 |
| Net (decrease) increase in cash, cash equivalents and restricted cash | (1654) | 5648 |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | (5) | 43 |
| Cash, cash equivalents and restricted cash—beginning of period | 6804 | 10635 |
| Cash, cash equivalents and restricted cash—end of period | $5145 | $16326 |
| **Supplemental disclosure of cash flow information:** |  |  |
| Cash paid for interest | $1359 | $886 |

---

*The accompanying notes are an integral part of these condensed consolidated financial statements.*

------

**INSTIL BIO, INC.**

**Notes to Condensed Consolidated Financial Statements** 

**(Unaudited)**

**1. Organization and Description of Business**

Instil Bio, Inc. (the "Company") is a biotechnology company focused on identifying and advancing innovative therapeutic opportunities.

In January 2026, the Company announced that its wholly owned subsidiary, Axion Bio, Inc. ("Axion Bio"), was discontinuing development of AXN-2510, its former lead product candidate. See Note 12 for further information.

The Company is actively seeking to in-license or acquire and develop additional novel therapeutic candidates in diseases with significant unmet medical need.

**2. Summary of Significant Accounting Policies**

***Basis of Presentation***

The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

The unaudited condensed consolidated financial statements have been prepared on the same basis as the audited annual consolidated financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary for the fair statement of the Company's financial position as of March 31, 2026, the condensed consolidated statements of operations and comprehensive loss for the three months ended March 31, 2026 and 2025, the condensed consolidated statements of stockholders' equity for the three months ended March 31, 2026 and 2025, and the results of its cash flows for the three months ended March 31, 2026 and 2025. The financial data and other information disclosed in these notes related to the three months ended March 31, 2026 and 2025 are also unaudited. The results for the three months ended March 31, 2026 are not necessarily indicative of results to be expected for the year ending December 31, 2026, any other periods, or any future year period. The Company has evaluated subsequent events through the date the condensed consolidated financial statements were issued.

The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and the related notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the Securities and Exchange Commission ("SEC") on March 27, 2026.

***Segments***

Operating segments are identified as components of an entity for which separate discrete financial information is available and that is regularly reviewed by the chief operating decision maker, the Company's Chief Executive Officer, in deciding how to allocate resources to an individual segment and in assessing performance. The Company has determined it operates in a single operating segment and has one operating segment. See Note 3 for further information.

------

***Cash, Cash Equivalents, Restricted Cash, and Marketable Securities***

The Company considers all highly liquid investments purchased with original maturities of three months or less from the purchase date to be cash equivalents. Cash equivalents include amounts invested in money market accounts.

As of March 31, 2026, restricted cash consisted of a cash reserve allocated to future tax payments related to the 2024 Loan (as defined in Note 8) and credit card collateral. As of December 31, 2025, restricted cash consisted solely of a cash reserve allocated to future tax payments related to the 2024 Loan. There was $0.1 million and $0.2 million in restricted cash as of March 31, 2026 and December 31, 2025, respectively, on the Company's condensed consolidated balance sheets.

The Company's investments in marketable securities have been classified and accounted for as available-for-sale. The Company classifies its maturities as either short-term or long-term based on each instrument's underlying contractual maturity date, which are carried at their fair values based on the quoted market prices of the securities. Unrealized gains and losses are reported as accumulated other comprehensive income (loss). Realized gains and losses on available-for-sale securities are included in net loss in the period earned or incurred. As of March 31, 2026 and December 31, 2025, marketable securities consisted of U.S. Treasury bills.

The Company periodically reviews whether its securities may be other-than-temporarily impaired, including whether or not (i) the Company has the intent to sell the security or (ii) it is more likely than not that the Company will be required to sell the security before its anticipated recovery. If one of these factors is met, the Company will record an impairment loss associated with its impaired investment. The impairment loss will be recorded as a write-down of investments in the condensed consolidated balance sheets and a realized loss within other expense in the condensed consolidated statements of operations and comprehensive loss. As of March 31, 2026 and December 31, 2025, there were no impairment losses for the investments.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the amounts shown in the condensed consolidated statements of cash flows (in thousands):

---

| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Cash and cash equivalents | $5022 | $6638 |
| Restricted cash | 123 | 166 |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash, cash equivalents and restricted cash | $5145 | $6804 |

---

***Going Concern***

The accompanying condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Management evaluated the Company's ability to continue as a going concern for the twelve months following the issuance of the condensed consolidated financial statements. As disclosed and defined in Note 8, the 2024 Loan is due in January 2027, for total principal of $85.6 million, which is in excess of cash, cash equivalents, and marketable securities on hand as of March 31, 2026, which management has concluded is an indicator of substantial doubt about the Company's ability to continue as a going concern.

The Company plans to cause Complex Therapeutics LLC, a wholly owned subsidiary of the Company, to execute its contractual right to extend the maturity of the 2024 Loan to January 2028. In addition, the Company may seek to cause Complex Therapeutics LLC to refinance or restructure the 2024 Loan, sell the Tarzana facility to repay the 2024 Loan, or seek additional financing in the form of equity or debt instruments. There can be no assurance that new financing or other forms of funding will be available on favorable terms or at all. The Company concluded that management's plans, including Complex Therapeutics LLC's contractual right to exercise the extension option to January 2028, which is within Complex Therapeutics LLC's control, alleviate the conditions that raise substantial doubt about the Company's ability to continue as a going concern.

------

***Assets Held for Sale***

The Company classifies long-lived assets or disposal groups to be sold as held for sale in the period in which all of the following criteria are met: management, having the authority to approve the action, commits to a plan to sell the asset or disposal group; the asset or disposal group is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets or disposal group; the sale of the asset or disposal group is probable, and transfer of the asset or disposal group is expected to qualify for recognition as a completed sale within one year, except if events or circumstances beyond the Company's control extend the period of time required to sell the asset or disposal group beyond one year; and actions required to complete the plan to sell have been initiated.

The Company initially measures a long-lived asset or disposal group that is held for sale at the lower of its carrying value or fair value less any costs to sell. Fair value is estimated by the Company through evaluations of quoted market prices received for other comparable held for sale assets sold by the Company. Any loss resulting from this measurement is recognized in the period in which the held for sale criteria are met. Conversely, gains are not recognized on the sale of a long-lived asset or disposal group until the date of sale. The Company assesses the fair value of a long-lived asset or disposal group less any costs to sell each reporting period it remains classified as held for sale and reports any subsequent changes as an adjustment to the carrying value of the asset or disposal group, as long as the new carrying value does not exceed the carrying value of the asset at the time it was initially classified as held for sale. Upon determining that a long-lived asset or disposal group meets the criteria to be classified as held for sale, the Company ceases depreciation and reports long-lived assets in the line item "assets held for sale" in its condensed consolidated balance sheets.

In March 2025, the Company's board of directors (the "Board of Directors") approved a plan to sell the Tarzana facility. The Company engaged a broker to facilitate a potential sale of the Tarzana facility and therefore reclassified the land and building as held for sale in the condensed consolidated balance sheet during the year ended December 31, 2025. The Tarzana facility is currently leased to AstraZeneca Pharmaceuticals LP ("Tenant") and Tenant has a right of first offer to purchase it. Refer to Note 8.

In May 2026, the Company determined that there had been a change to its plan with respect to the Tarzana facility and the Board of Directors approved discontinuing the plan to market the Tarzana facility for sale. As a result, the Company determined that this asset no longer meets the criteria to be classified as held for sale under ASC 360. Consequently, in the second quarter of 2026, this asset will be reclassified as held and used at the lower of (a) its carrying amount before the asset was classified as held for sale, adjusted for depreciation expenses that would have been recognized had the asset been continuously classified as held and used, and (b) its fair value. The Company is currently evaluating the financial statement impact of this reclassification. The resulting adjustment will be recognized in the second quarter in the condensed consolidated statement of operations and comprehensive loss as a component of gain (loss) from operations.

The fair value less the cost to sell of the Tarzana facility was $112.1 million on the Company's condensed consolidated balance sheets as of March 31, 2026 and December 31, 2025. During the three months ended March 31, 2026, the Company concluded that no impairment indicators were present and recorded no impairment charge. The Company recorded building impairments related to the Tarzana facility of nil and $16.6 million during the three months ended March 31, 2026 and 2025, respectively. Refer to Note 12.

***Impairment of Long-Lived Assets***

The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable or that the useful life is shorter than originally estimated. Recoverability of assets is measured by comparing the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset over its remaining useful life. If such assets are impaired, the impairment recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. If the useful life is shorter than originally estimated, the Company depreciates or amortizes the remaining carrying value over the revised shorter useful life. See Note 12 for more information.

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***Research and Development Expenses***

Research and development costs are expensed as incurred. Clinical trial and other development costs incurred by third parties are expensed as the contracted work is performed. The Company accrues for costs incurred as the services are being provided by monitoring the status of the trial or project and the invoices received from its external service providers. The Company adjusts its accrual as actual costs become known. Where contingent milestone payments are due to third parties under research and development arrangements or license agreements, the milestone payment obligations are expensed when the milestone results are achieved.

***Recent Accounting Pronouncements Not Yet Adopted***

In November 2024, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40) ("ASU 2024-03"). The amendments in this update require disclosure, in the notes to the financial statements, of specific expense categories present within expense captions presented on the face of the income statement within continuing operations of public business entities. The amendments in this update are effective for annual periods beginning after December 15, 2026 and interim periods beginning after December 15, 2027. The Company is currently evaluating the impact of ASU 2024-03 on its consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU No. 2025-07, Derivatives and Hedging and Revenue from Contracts with Customers - Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract ("ASU 2025-07") which applies to all entities that enter into non-exchange-traded contracts with underlyings based on operations or activities specific to one of the parties to the contract. The new guidance excludes from derivative accounting non-exchange-traded contracts with underlyings that are based on operations or activities specific to one of the parties to the contract. ASU 2025-07 is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods. Early adoption is permitted. The Company does not expect adoption of ASU 2025-07 to have a material impact on its condensed consolidated financial statements and related disclosures.

A variety of proposed or otherwise potential accounting standards are currently being studied by standard-setting organizations and certain regulatory agencies. Because of the tentative and preliminary nature of such proposed standards, the Company has not yet determined the effect, if any, that the implementation of such proposed standards would have on the Company's consolidated financial statements.

**3. Segment Reporting**

The Company manages its business activities on a consolidated basis and has one reportable segment relating to the research and development of novel therapies. The Chief Executive Officer, who serves as the Company's chief operating decision maker ("CODM"), is responsible for the overall supervision, direction, and management of the business and its officers.

The CODM reviews net loss, as reported in the condensed consolidated statements of operations and comprehensive loss, as well as the progress of the Company's program(s). The CODM does not review assets in evaluating the results of the segment, and therefore, such information is not presented. All long-lived assets owned by the Company are located in the United States. The accounting policies of the segment are the same as those described in Note 2.

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The following table is a summary of the segment and consolidated net loss, including significant segment expenses for the three months ended March 31, 2026 and 2025 (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| AXN-2510 | $659 | $4715 |
| Other program expenses<sup>(1)</sup> | 10 | 656 |
| General and administrative<sup>(2)</sup> | 5338 | 8611 |
| Restructuring charges | 992 | 16082 |
| Depreciation | 11 | 498 |
| Interest income | (678) | (1175) |
| Interest expense | 1552 | 1098 |
| Gain on contract termination | (1620) |  |
| Other income, net | (2060) | (2285) |
| &nbsp;&nbsp;&nbsp;&nbsp;Segment and consolidated net loss | $4204 | $28200 |

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______________________________________________________________

(1)&nbsp;&nbsp;&nbsp;&nbsp;Other program expenses consist of costs related to the Company's past development of its CoStAR-TIL technology.

(2)&nbsp;&nbsp;&nbsp;&nbsp;Depreciation expense is removed from "General and administrative" and is disclosed separately.

**4. Balance Sheet Components**

***Prepaid and other current assets***

Prepaid and other current assets consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Prepaid general and administrative | $941 | $1170 |
| Prepaid research and development | 124 | 441 |
| Tax-related receivable | 28 | 848 |
| Prepaid contract research organization expenses | 276 | 431 |
| Other current assets | 143 | 148 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total prepaid and other current assets | $1512 | $3038 |

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***Property, Plant and Equipment, Net***

Property, plant and equipment, net consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Office furniture and computer equipment | $501 | $509 |
| Less: accumulated depreciation | (389) | (383) |
| &nbsp;&nbsp;&nbsp;&nbsp;Total property, plant and equipment, net | $112 | $126 |

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Depreciation expense was nil and $0.5 million for the three months ended March 31, 2026 and 2025, respectively, in the condensed consolidated statements of operations and comprehensive loss. In March 2025, the Tarzana facility was classified as held for sale, and accordingly, depreciation ceased upon such classification.

As of March 31, 2026, the Company had $112.1 million in assets related to the Tarzana facility on the condensed consolidated balance sheet meeting the criteria of held for sale assets. These assets are recognized at the lower of cost or fair value less costs to sell. The Company estimates the fair value of its Tarzana facility through a combination of an income-based approach and a market-based approach. The income-based approach is dependent on specific assumptions such as market rental rates, capitalization rates and discount rates. The market-based approach utilizes observable data such as comparable building sales. The fair value of these assets are classified as Level 3 in the fair value hierarchy due to a mix of unobservable inputs utilized such as proprietary independent

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research in the market as well as actual quotes from market participants. As a result, the Company recognized an impairment of long-lived assets held for sale of nil and $16.6 million related to the building and land during the three months ended March 31, 2026 and 2025, respectively.

***Accrued Expenses and Other Current Liabilities***

Accrued expenses and other current liabilities consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Accrued compensation and benefits | $2252 | $2517 |
| Accrued operational expenses | 178 | 43 |
| Accrued restructuring costs | 155 | 155 |
| Accrued research, development and clinical trial expenses | 1159 | 977 |
| Operating lease liabilities, current | 186 | 372 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total accrued expenses and other current liabilities | $3930 | $4064 |

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**5. Fair Value Measurement**

The carrying amounts of cash and cash equivalents, receivables, prepaid expenses, accounts payable and accrued expenses approximate their fair values due to the short-term nature of these instruments. Cash and cash equivalents consist primarily of cash and highly liquid investments with original maturities of three months or less at the time of purchase; accordingly, their carrying amounts approximate fair value. Cash and cash equivalents are valued based upon quoted market prices in active markets for identical assets and are therefore classified as Level 1 assets. Money market funds are open-end mutual funds that invest in cash, government securities, and/or repurchase agreements that are collateralized fully. To the extent that these funds are valued based upon the reported net asset value, they are categorized in Level 1 of the fair value hierarchy.

Short-term marketable securities consisted of U.S. Treasury bills that are classified within Level 2 of the fair value hierarchy are valued based on other observable inputs, including broker or dealer quotations, alternative pricing sources or U.S. Government Treasury yield of appropriate term.

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring and nonrecurring basis:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **As of March 31, 2026** | **As of March 31, 2026** | **As of March 31, 2026** | **As of March 31, 2026** |
| | **Level 1** | **Level 2** | **Level 3** | **Total** |
| | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| **Financial Assets** | | | | |
| Money market funds | $370 | $— | $— | $370 |
| U.S. Treasury bills |  | 69549 |  | 69549 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total | $370 | $69549 | $— | $69919 |
|  | **As of December 31, 2025** | **As of December 31, 2025** | **As of December 31, 2025** | **As of December 31, 2025** |
|  | **Level 1** | **Level 2** | **Level 3** | **Total** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| **Financial Assets** |  |  |  |  |
| Money market funds | $4339 | $— | $— | $4339 |
| U.S. Treasury bills |  | 69491 |  | 69491 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total | $4339 | $69491 | $— | $73830 |

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There were no transfers in or out of Level 1, 2 and 3 measurements for the three months ended March 31, 2026 and the year ended December 31, 2025. As of March 31, 2026 and December 31, 2025, there were no securities within Level 3 of the fair value hierarchy.

As of March 31, 2026 and December 31, 2025, the fair value of the 2024 Loan (as defined in Note 8) was $85.6 million and $85.5 million, respectively. The fair value was determined on the basis of its net present value and is considered Level 2 in the fair value hierarchy.

**6. Financial Instruments**

Marketable securities classified as available-for-sale as of March 31, 2026 and December 31, 2025 consisted of the following (in thousands):

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **March 31, 2026** | **March 31, 2026** | **March 31, 2026** | **March 31, 2026** | **March 31, 2026** |
| | **Maturity** | **Amortized Cost** | **Gross Unrealized Gains** | **Gross Unrealized Losses** | **Fair Value** |
| U.S. Treasury bills | Less than one year | $69577 | $13 | $(41) | $69549 |

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **December 31, 2025** | **December 31, 2025** | **December 31, 2025** | **December 31, 2025** | **December 31, 2025** |
| | **Maturity** | **Amortized Cost** | **Gross Unrealized Gains** | **Gross Unrealized Losses** | **Fair Value** |
| U.S. Treasury bills | Less than one year | $69439 | $58 | $(6) | $69491 |

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As of March 31, 2026 and December 31, 2025, marketable securities that had contractual maturities less than one year are classified as current because management considers these marketable securities to be available for current operations. The Company does not intend to sell its marketable securities and it is not likely that the Company will be required to sell these securities before recovery of their amortized cost basis. There were $69.5 million of marketable securities classified as available-for-sale as of March 31, 2026 and December 31, 2025.

**7. License and Collaboration Agreement with ImmuneOnco**

On August 1, 2024, Axion Bio entered into a license and collaboration agreement (the "IO Collaboration Agreement") with ImmuneOnco Biopharmaceuticals (Shanghai) Inc. ("ImmuneOnco"), under which it in-licensed several bispecific antibodies, including AXN-2510 and AXN-27M. As part of the IO Collaboration Agreement, Axion Bio made a $10.0 million upfront payment to ImmuneOnco during the year ended December 31, 2024. This amount was fully expensed as in-process research and development (IPR&D) in the same year.

During the year ended December 31, 2024, Axion Bio made a $5.0 million prepayment to ImmuneOnco for development costs, which was fully recognized as research and development expense by March 31, 2025. In April 2025, Axion Bio made a second $5.0 million prepayment to ImmuneOnco for development costs, which was fully recognized as research and development expense by September 30, 2025. In August 2025, Axion Bio made a third $5.0 million prepayment to ImmuneOnco for development costs, which was fully recognized as research and development expense by the three months ended March 31, 2026.

In June 2025, Axion Bio achieved Investigational New Drug (IND) clearance in the United States for a Phase 1 trial of AXN-2510 in relapsed/refractory solid tumors. This milestone triggered a $10.0 million development payment to ImmuneOnco, which was paid in July 2025. This amount was fully expensed as IPR&D during the second quarter of 2025.

The expenses recognized in connection with the IO Collaboration Agreement were $0.3 million and $4.3 million for the three months ended March 31, 2026 and 2025, respectively, and were recorded as a component of

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research and development expense on the condensed consolidated statements of operations and comprehensive loss. As of March 31, 2026, no additional milestones were accrued.

On January 5, 2026, Axion Bio and ImmuneOnco entered into an agreement terminating the IO Collaboration Agreement. Under the termination agreement, Axion Bio agreed to transfer the rights, title, and interest related to AXN-2510 and AXN-27M to ImmuneOnco, and ImmuneOnco agreed to pay Axion Bio $1.8 million, of which $1.6 million was received during the quarter ended March 31, 2026 and recorded as other income as a gain on contract termination in the condensed consolidated statements of operations and comprehensive loss. Receipt of the remaining $0.2 million is contingent upon the completion of specified wind-down activities.

**8. Commitments and Contingencies**

***Leases***

**Company as a Lessee: Operating Lease Obligations**

The Company currently leases office spaces and laboratory spaces located in Dallas, Texas, and Alderley Park in the United Kingdom. During April 2025, the Company terminated its prior lease in Thousand Oaks, California. The Company's leased facilities have original lease terms ranging from 2 to 5 years that in general require the Company to provide a security deposit. Certain leases provide the right for the Company to renew the lease upon the expiration of the initial lease term, and various leases have scheduled rent increases on an annual basis. The exercise of lease renewal options for the Company's existing leases is at the Company's sole discretion, and not included in the measurement of right-of-use asset or lease liability as they are not reasonably certain to be exercised.

The Company's lease costs consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Operating lease cost | $179 | $422 |
| Variable lease cost | 188 | 165 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total lease cost | $367 | $587 |

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The following table summarizes cash flow information related to the Company's lease obligations (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Cash paid for operating lease liabilities | $175 | $417 |

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The following table summarizes the Company's lease assets and liabilities (in thousands):

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Operating lease right-of-use assets | $60 | $238 |
| Current operating lease liabilities | $186 | $372 |

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The following table summarizes other supplemental information related to the Company's lease obligations:

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Weighted-average remaining lease term (in years) | 0.6 | 0.7 |
| Weighted-average discount rate | 6.75% | 6.75% |

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Subsequent to March 31, 2026, the Company extended its lease in Dallas to April 2031, which was originally set to expire in April 2026. The Alderley Park leases in the United Kingdom are set to expire in November 2026.

As of March 31, 2026, future minimum lease payments under operating lease liabilities were $0.2 million, excluding any future payments associated with the Dallas lease extension.

Operating lease liabilities are recorded in the line item "accrued expenses and other current liabilities" in the condensed consolidated balance sheet.

**Company as a Lessor: Tarzana Facility Lease with AstraZeneca**

On July 10, 2024, Complex Therapeutics LLC, a wholly owned subsidiary of the Company, entered into a lease with AstraZeneca Pharmaceuticals LP pursuant to which Tenant is leasing the facility located in Tarzana, California (the "Lease"). The Lease has an initial term of approximately 15 years, beginning on July 10, 2024 and ending on July 31, 2039, with Tenant having two consecutive options to extend the term for a five-year period each and a one-time option to terminate the Lease on the tenth anniversary of the commencement of the Lease, which, if exercised, obligates Tenant to pay Complex Therapeutics LLC a termination fee. The initial base rent was approximately $0.6 million per month (approximately $7.5 million annually) and the base rent escalates by 3% per annum. Tenant is also required to pay certain operating expenses and tax expenses as additional rent. There was rent abatement during the first year of the Lease such that Tenant paid no rent or reduced rent during this period. Tenant also has a right of first offer to purchase the premises that are subject to the Lease.

The Lease is classified as an operating lease and revenue is recognized on a straight-line basis and is recorded within the condensed consolidated statements of operations and comprehensive loss in the line item "Other rental income" as this is not a part of the Company's core operations. Rental income related to the Lease was as follows (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Rental income related to fixed lease income | $2242 | $2242 |

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Approximate future straight-lined contractual lease income to be recognized under the Lease in effect as of March 31, 2026, is as follows (in thousands):

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| | |
|:---|:---|
| | **March 31, 2026** |
| 2026 (remaining nine months) | $6726 |
| 2027 | 8968 |
| 2028 | 8968 |
| 2029 | 8968 |
| 2030 | 8968 |
| Thereafter | 76973 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total | $119571 |

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Differences between rental income earned and amounts due per the Lease are capitalized or charged, as applicable, to accrued rent receivable. As of March 31, 2026 and December 31, 2025, the Company had accrued rent receivable of $8.0 million and $7.7 million, respectively.

***Legal Proceedings***

From time to time, the Company may have certain contingent liabilities that arise in the ordinary course of its business activities. The Company accrues a liability for such matters when it is probable that future expenditures will be made and that such expenditures can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount. The Company does not expect that the resolution of these matters will have a material adverse effect on its financial position, results of operations or cash flows.

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***Debt***

In June 2022, the Company's wholly owned subsidiaries Complex Therapeutics Mezzanine LLC and Complex Therapeutics LLC entered into a mortgage construction loan and mezzanine construction loan (together, the "Construction Loans") secured by Complex Therapeutic LLC's Tarzana, California land and building. The initial principal amount of the Construction Loans was $52.1 million, with additional future principal of up to $32.9 million to fund ongoing construction costs.

On December 20, 2024 (the "Closing Date"), Complex Therapeutics LLC entered into a Term Loan Agreement (the "2024 Loan") and related loan documents with Midland National Life Insurance Company ("Lender"), pursuant to which Lender loaned Complex Therapeutics LLC a term loan in the principal amount of $85.6 million to refinance the Construction Loans. Substantially all of the 2024 Loan proceeds were used to repay in full the Construction Loans. As of both March 31, 2026 and December 31, 2025, the outstanding principal amount under the 2024 Loan was $85.6 million. Unamortized debt issuance costs were $0.6 million and $0.8 million as of March 31, 2026 and December 31, 2025, respectively.

The 2024 Loan has a term of two years with a one-year extension option. The extension option is subject to certain conditions being met, including: (a) no potential default or event of default, (b) payment of a 0.35% extension fee and the costs and expenses of Lender incurred in connection with the extension, (c) replenishing of all reserve funds as reasonably determined by Lender, and (d) compliance with minimum debt yield and debt service coverage ratio requirements. The 2024 Loan bears interest at a fixed rate of 6.35% per annum, with interest-only payments during the term and the principal balance due in full at maturity.

The 2024 Loan may be prepaid in whole but not in part. If the 2024 Loan is prepaid on or prior to the 12-month anniversary of the Closing Date, a prepayment fee is required (other than in connection with a casualty or condemnation event) to make Lender whole for the interest it would have otherwise earned on the 2024 Loan during the first 12 months. There is no prepayment fee due if the 2024 Loan is prepaid after the 12-month anniversary of the Closing Date.

The net carrying amount of the liability component of the 2024 Loan was as follows (in thousands):

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| | | |
|:---|:---|:---|
| | **March 31, 2026** | **December 31, 2025** |
| Principal amount | $85600 | $85600 |
| Unamortized debt issuance cost | (601) | (794) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net carrying amount | $84999 | $84806 |

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The following table sets forth the interest expense recognized related to the 2024 Loan (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Contractual interest expense | $1359 | $886 |
| Amortization of debt issuance cost | 193 | 212 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total interest expense related to the 2024 Loan | $1552 | $1098 |

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***Indemnifications***

The Company has entered into indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers to the fullest extent permitted by Delaware corporate law. The Company currently has directors' and officers' insurance coverage that reduces its exposure and enables the Company to recover a portion of any future amounts paid. No liability associated with such indemnifications was recorded as of March 31, 2026 and December 31, 2025.

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***Other Commitments***

In the normal course of business, the Company enters into contracts and various purchase agreements and commitments with third-party vendors for clinical research services, products and other services for operating purposes. These agreements generally provide for termination or cancellation at the Company's option, other than for costs already incurred.

As of March 31, 2026 and December 31, 2025, the Company had $0.2 million in commitments for contract terminations as part of the Plan (see Note 12).

**9. Equity**

***Common Stock***

Each share of common stock has the right to one vote. The holders of common stock are also entitled to receive dividends out of legally available funds when and if declared by the Company's Board of Directors, subject to the rights of holders of any classes of stock outstanding having priority rights as to dividends. No cash dividends have been declared by the Board of Directors from inception.

As of March 31, 2026 and December 31, 2025, the Company had 6,781,976 shares of common stock outstanding.

***At-the-Market Offering***

In March 2025, the Company entered into an Open Market Sale Agreement<sup>SM</sup> with Jefferies LLC ("Jefferies") pursuant to which the Company may, subject to the terms and conditions set forth in the agreement, offer and sell, from time to time, through or to Jefferies, acting as agent or principal, shares of common stock having an aggregate offering price of up to $100.0 million in one or more "at the market offerings" (the "ATM Program").

As of December 31, 2025, the Company had sold 185,837 shares of common stock under the ATM Program at a weighted-average price of $37.13 per share, for net proceeds of $6.6 million, after deducting commissions and expenses of approximately $0.3 million. The remaining availability under the ATM Program as of both December 31, 2025 and March 31, 2026 was approximately $93.1 million. There were no sales under the ATM Program during the three months ended March 31, 2026.

***Preferred Stock***

The Company's current amended and restated certificate of incorporation authorizes the Company to issue up to 10,000,000 shares of preferred stock at $0.000001 par value per share. The Board of Directors is authorized to provide for the issuance of the preferred stock in one or more series, and to fix the number of shares and to determine or alter for each such series, such voting powers, full or limited, or no voting powers, and such designation, preferences, and relative, participating, optional, or other rights and such qualifications, limitations, or restrictions thereof, as shall be stated and expressed in subsequent resolution or resolutions adopted by the board providing for the issuance of such shares. As of March 31, 2026 and December 31, 2025, there were no shares of preferred stock issued or outstanding.

**10. Stock-Based Compensation**

***2021 Equity Incentive Plan***

In March 2021, the Company adopted the 2021 Equity Incentive Plan (the "2021 Plan"), which became effective in connection with the Company's initial public offering ("IPO"). The 2021 Plan was approved by the Board of Directors and stockholders in March 2021. The 2021 Plan is an equity incentive plan pursuant to which the Company may grant the following awards: (i) incentive stock options; (ii) nonstatutory stock options; (iii) stock appreciation rights; (iv) restricted stock awards; (v) restricted stock unit awards; (vi) performance awards; and (vii)

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other forms of stock awards to employees, directors, and consultants, including employees and consultants of the Company's affiliates. The 2021 Plan is a successor to the Company's 2018 Stock Incentive Plan (the "2018 Plan"). Following the effectiveness of the 2021 Plan, no further grants may be made under the 2018 Plan; however, any outstanding equity awards granted under the 2018 Plan will continue to be governed by the terms of the 2018 Plan.

As of March 31, 2026, 951,236 shares of common stock remained available for issuance under the 2021 Plan.

The following table sets forth stock-based compensation included in the Company's condensed consolidated statements of operations and comprehensive loss (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Stock-based compensation expense | $985 | $3495 |

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As of March 31, 2026, there was $9.2 million of total unrecognized compensation cost related to unvested stock options granted under the 2021 Plan, which is expected to be recognized over a weighted average period of 2.1 years.

***Employee Stock Purchase Plan***

In March 2021, the Company adopted the Employee Stock Purchase Plan (the "ESPP"), which became effective in connection with the IPO. The ESPP was adopted by the Board of Directors and stockholders in March 2021, but the Company has not yet commenced offerings to employees under the ESPP. As of March 31, 2026, the Company had 192,148 shares of its common stock available for future issuance under the ESPP.

**11. Net Loss Per Share**

The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share for the periods presented due to their anti-dilutive effect:

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| | | |
|:---|:---|:---|
| | **March 31,** | **March 31,** |
| | **2026** | **2025** |
| Stock options to purchase common stock | 1,406,324 | 1,234,635 |

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**12. Restructuring and Impairment of Long-Lived Assets**

In January 2023, the Board of Directors approved a restructuring plan and the Company announced the consolidation of the ITIL-306 Phase 1 clinical trial, which included contract terminations.

In January 2024, the Board of Directors approved a comprehensive restructuring plan, which included the closure of the Company's UK manufacturing facility and clinical trial operations. In September 2024, the Board of Directors approved additional UK restructuring actions, which resulted in the elimination of the majority of the remaining UK workforce in the fall of 2024, with the remaining reduction and restructuring activities substantially completed by the end of 2024.

Collectively, the restructuring events from 2023 and 2024 are referred to as the "Plan." Certain contractual obligations associated with the Plan were settled in 2025, resulting in related cost adjustments.

In March 2025, the Board of Directors approved a plan to sell the Tarzana facility, and the Company listed the Tarzana facility for sale and reclassified it as a long-lived asset held for sale and incurred impairment charges on the facility and as well as charges related to the anticipated cost to sell the facility, collectively, these charges are referred to as (the "2025 Tarzana Charges").

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In January 2026, Axion Bio discontinued development of AXN-2510, and the Company terminated certain employees associated with this program (the "2026 Employee Terminations").

***Restructuring and Impairment Charges***

As a result of the 2026 Employee Terminations, the Company recorded charges of $1.0 million within the condensed consolidated statements of operations and comprehensive loss in the line item "restructuring and impairment charges" for the three months ended March 31, 2026. As a result of the 2025 Tarzana Charges and the Plan, the Company recorded charges of $16.1 million within the condensed consolidated statements of operations and comprehensive loss in the line item "restructuring and impairment charges" for the three months ended March 31, 2025.

The following table summarizes the restructuring and impairment loss (gain) by category (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Contract terminations | $— | $(487) |
| Impairment of long-lived assets held for sale |  | 16569 |
| One-time employee termination benefits | 992 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Total restructuring and impairment charges | $992 | $16082 |

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***Restructuring Liability***

As a result of the Plan and the 2026 Employee Terminations, a restructuring liability was recorded in the condensed consolidated balance sheets under "Accrued expenses and other current liabilities" and was measured at the amount expected to be paid, or that was paid. During the quarter ended March 31, 2026, the Company paid $1.0 million of employee benefits and expects to pay the remainder of the restructuring costs by the end of 2026.

The following table shows the restructuring liability related to the Plan and the 2026 Employee Terminations (in thousands):

---

| | | | |
|:---|:---|:---|:---|
| | **Employee Benefits** | **Contract Terminations** | **Total** |
| Restructuring liability as of December 31, 2025 | $— | $155 | $155 |
| Additions | 992 |  | 992 |
| Payments | (992) |  | (992) |
| Restructuring liability as of March 31, 2026 | $— | $155 | $155 |

---

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**Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations**

*The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited condensed consolidated financial statements and related notes included in this Quarterly Report on Form 10-Q and the audited financial statements and notes thereto as of and for the year ended December 31, 2025 and the related Management's Discussion and Analysis of Financial Condition and Results of Operations, both of which are contained in our Annual Report on Form 10-K filed with the Securities and Exchange Commission, or the SEC, on March 27, 2026. Unless the context requires otherwise, references in this Quarterly Report on Form 10-Q to "we," "us" and "our" refer to Instil Bio, Inc. and our consolidated subsidiaries.*

**Forward-Looking Statements**

**Overview**

We are a biotechnology company focused on identifying and advancing innovative therapeutic opportunities.

In January 2026, we announced that our wholly owned subsidiary, Axion Bio, Inc., or Axion Bio, was discontinuing development of AXN-2510, our former lead product candidate. We are actively seeking to in-license or acquire and develop additional novel therapeutic candidates in diseases with significant unmet medical need.

Since inception, we have had significant operating losses. Our net loss was $4.2 million for the three months ended March 31, 2026. As of March 31, 2026, we had an accumulated deficit of $730.7 million. As of March 31, 2026, we had cash, cash equivalents, restricted cash and marketable securities of approximately $74.7 million, which consists of $5.0 million in cash and cash equivalents, $0.1 million in restricted cash and $69.5 million in marketable securities. We expect to continue to incur net losses for the foreseeable future.

**Components of Operating Results**

***Operating Expenses***

*Research and Development*

Research and development expenses consist primarily of research and development, manufacturing, monitoring and other services payments and, to a lesser extent, salaries, benefits and other personnel-related costs, including stock-based compensation, professional service fees, and facility and other related costs. In addition, research and development expense is presented net of reimbursements from reimbursable tax and expenditure credits and grants from the UK government.

We expect our future research and development expenses to change in line with our potential business development activities and any nonclinical and clinical development activities. Our expenditures on any future

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nonclinical and clinical development programs are subject to numerous uncertainties in timing and cost to completion. The duration, costs and timing of clinical trials and development of product candidates will depend on a variety of factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope, rate of progress and expenses of clinical trials and other research and development activities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential safety monitoring and other studies requested by regulatory agencies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• significant and changing government regulation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing and receipt of regulatory approvals, if any.

The process of conducting the necessary clinical research to obtain regulatory approval from the U.S. Food and Drug Administration, or FDA, Medicines and Healthcare Products Regulatory Agency, or MHRA, European Medicines Agency, or EMA, and comparable foreign authorities is costly and time-consuming and the successful development of product candidates is highly uncertain. The risks and uncertainties associated with our research and development projects are discussed more fully in the section of this Quarterly Report titled "Risk Factors." As a result of these risks and uncertainties, we are unable to determine with any degree of certainty the duration and completion costs of our research and development projects, or if, when or to what extent we will generate revenues from the commercialization and sale of any product candidates that obtain regulatory approval. We may never succeed in achieving regulatory approval for any product candidates.

*General and Administrative*

General and administrative expenses consist primarily of compensation and personnel-related expenses, including stock-based compensation, for our personnel in executive, finance and other administrative functions. General and administrative expenses also include professional fees paid for accounting, auditing, legal, tax and consulting services, insurance costs, recruiting costs, travel expenses, facility and other related costs, depreciation, and other general and administrative costs.

We expect to continue to incur expenses as a result of operating as a public company, including expenses related to compliance with the rules and regulations of the SEC, director and officer insurance expenses, and any investor relations related expenses, as well as other administrative and professional services.

*Restructuring and Impairment Charges*

Restructuring and impairment charges for the three months ended March 31, 2026 consisted of employee termination costs. Restructuring and impairment charges for the three months ended March 31, 2025 consisted primarily of an impairment loss recognized on long-lived assets held for sale in connection with listing our Tarzana facility for sale in March 2025, partially offset by a settlement gain on terminated contracts.

In January 2023, the Board of Directors approved a restructuring plan and we announced the consolidation of the ITIL-306 Phase 1 clinical trial, which included contract terminations.

In January 2024, we decided to initiate closure of our UK manufacturing and clinical operations related to our past development of our CoStAR-TIL technology, and in September 2024 we decided to close most of our remaining Manchester, UK operations related to our past development of our CoStAR-TIL technology, which resulted in the elimination of the majority of the remaining UK workforce, with the remaining reduction substantially completed by the end of 2024.

Collectively, the restructuring events from 2023 and 2024 are referred to as the "Plan."

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In March 2025, the Board of Directors approved a plan to sell our Tarzana facility, and we listed our Tarzana facility for sale. At such time, we reclassified the facility as a long-lived asset held for sale and incurred impairment charges related thereto, which we refer to as the 2025 Tarzana Charges.

In May 2026, we determined that there had been a change to our plan with respect to the Tarzana facility and the Board of Directors approved discontinuing the plan to market the Tarzana facility for sale. As a result, we determined that this asset no longer meets the criteria to be classified as held for sale under ASC 360. Consequently, in the second quarter of 2026, this asset will be reclassified as held and used at the lower of (a) its carrying amount before the asset was classified as held for sale, adjusted for depreciation expenses that would have been recognized had the asset been continuously classified as held and used, and (b) its fair value. We are currently evaluating the financial statement impact of this reclassification. The resulting adjustment will be recognized in the second quarter in the condensed consolidated statement of operations and comprehensive loss as a component of gain (loss) from operations.

In January 2026, Axion Bio discontinued development of AXN-2510 and terminated certain employees associated with this program, or the 2026 Employee Terminations.

As a result of the Plan, the 2025 Tarzana Charges and the 2026 Employee Terminations, we incurred restructuring and impairment charges of $1.0 million and $16.1 million during the three months ended March 31, 2026 and 2025, respectively.

***Interest Income***

Interest income consists of interest income from funds held in our cash and cash equivalent accounts, restricted cash and marketable securities.

***Interest Expense***

Interest expense consists of interest expense on our debt and amortization of loan origination costs.

***Other Rental Income***

Other rental income consists of rental income related to the Tarzana facility.

***Gain on Contract Termination***

Gain on contract termination consists of a payment received pursuant to the termination agreement between ImmuneOnco Biopharmaceuticals (Shanghai) Inc., or ImmuneOnco, and Axion Bio related to discontinuing development of AXN-2510.

***Other (Expense) Income, Net***

Other (expense) income, net consists primarily of foreign exchange remeasurement gain or loss and other expenses and income.

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**Results of Operations**

***Comparison of the Three Months Ended March 31, 2026 and 2025***

The following table summarizes our results of operations for the three months ended March 31, 2026 and 2025 (in thousands):

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| | | | |
|:---|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** | **Change** |
| | **2026** | **2025** | **$** |
| Operating expenses: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Research and development | $669 | $5371 | $(4702) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 5349 | 9109 | (3760) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Restructuring and impairment charges | 992 | 16082 | (15090) |
| Total operating expenses | 7010 | 30562 | (23552) |
| Loss from operations | (7010) | (30562) | 23552 |
| Interest income | 678 | 1175 | (497) |
| Interest expense | (1552) | (1098) | (454) |
| Other rental income | 2242 | 2242 |  |
| Gain on contract termination | 1620 |  | 1620 |
| Other (expense) income, net | (182) | 43 | (225) |
| Net loss | $(4204) | $(28200) | $23996 |

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*Research and Development Expenses*

Research and development expenses were $0.7 million and $5.4 million for the three months ended March 31, 2026 and 2025, respectively. The net decrease of approximately $4.7 million was primarily due to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $3.6 million decrease in costs related to research and clinical development activities primarily due to discontinuing development of AXN-2510; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $1.1 million decrease in employee-related costs from reduced headcount, consisting primarily of a $0.6 million decrease in stock-based compensation expense and a decrease in bonus and severance payments of $0.5 million.

The following table shows our research and development expenses by program for the three months ended March 31, 2026 and 2025 (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Research and development: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;AXN-2510 | $659 | $4715 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other program expenses <sup>(1)</sup> | 10 | 656 |
| Total research and development expenses by program | $669 | $5371 |

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______________________________________________________________

(1) &nbsp;&nbsp;&nbsp;&nbsp;Other program expenses consist of costs related to our past development of our CoStAR-TIL technology.

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*General and Administrative Expenses*

General and administrative expenses were $5.3 million and $9.1 million for the three months ended March 31, 2026 and 2025, respectively. The net decrease of $3.8 million was primarily due to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $2.3 million decrease in employee-related costs from reduced headcount, consisting primarily of a $1.9 million decrease in stock-based compensation expense and a $0.4 million decrease in bonus and other employee-related expenses;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.8 million decrease in consulting and professional services costs; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.7 million decrease in insurance expense, depreciation, and office expenses.

*Restructuring and Impairment Charges*

Restructuring and impairment charges were approximately $1.0 million and $16.1 million for the three months ended March 31, 2026 and 2025, respectively. The net decrease of approximately $15.1 million was primarily due to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $16.6 million impairment recognized on long-lived assets held for sale mainly related to impairment of the Tarzana facility and as well as charges related to the anticipated cost to sell the facility in the first quarter of 2025; partially offset by

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $1.0 million increase in severance payments; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.5 million increase due to a settlement gain on terminated contracts in 2025.

*Interest Income, Interest Expense, Other Rental Income, Gain on Contract Termination, and Other (Expense) Income, Net*

Interest income, interest expense, other rental income, gain on contract termination and other (expense) income, net were $2.8 million and $2.4 million of income for the three months ended March 31, 2026 and 2025, respectively. The net increase of approximately $0.4 million was primarily due to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $1.6 million increase in gain on contract termination;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.1 million decrease in other expenses; partially offset by

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.5 million increase in interest expense related to the 2024 Loan (as defined below);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.5 million decrease in interest income related to our investments; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $0.3 million increase in foreign currency transaction losses.

**Liquidity and Capital Resources**

***Sources of Liquidity***

Since our inception, we have not generated any revenue from product sales and we have incurred significant operating losses. We do not have any products that have achieved regulatory marketing approval and we do not expect to generate revenue from commercial sales of any product candidate for at least several years, if ever.

Prior to our initial public offering, or IPO, we funded our operations primarily through the issuance and sale of convertible preferred stock. From our inception through March 2021, prior to our IPO, we raised net cash proceeds of $380.1 million from the issuance and sale of our convertible preferred stock.

In the first quarter of 2021, we raised net proceeds of $339.0 million in our IPO pursuant to which we sold an aggregate of 920,000 shares of common stock.

In June 2022, our wholly owned subsidiaries, Complex Therapeutics Mezzanine LLC and Complex Therapeutics LLC, entered into a mortgage construction loan and mezzanine construction loan, or together, the Construction Loans, secured by Complex Therapeutics LLC's Tarzana, California land and building. Construction of the Tarzana facility was subsequently completed and in 2024 the facility was leased to AstraZeneca

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Pharmaceuticals LP, or Tenant. The initial base rent under the lease to Tenant was approximately $0.6 million per month (approximately $7.5 million annually) and the base rent escalates by 3% per annum. On December 20, 2024, or the Closing Date, Complex Therapeutics LLC entered into a Term Loan Agreement and related loan documents with Midland National Life Insurance Company, or Midland, pursuant to which Midland loaned Complex Therapeutics LLC a term loan in the principal amount of $85.6 million, or the 2024 Loan, to refinance the Construction Loans secured by the Tarzana facility. Substantially all of the 2024 Loan proceeds were used to repay in full the Construction Loans.

On November 13, 2024, we filed a shelf registration statement on Form S-3 with the SEC, which the SEC declared effective on November 21, 2024. Pursuant to our shelf registration statement we may, from time to time, sell up to an aggregate of $200 million of our common stock, preferred stock, debt securities or warrants.

In March 2025, we entered into an Open Market Sale Agreement<sup>SM</sup>, with Jefferies LLC, or Jefferies, as sales agent, under which we may offer and sell, from time to time, shares of our common stock, through Jefferies, with an aggregate offering price of up to $100 million by methods deemed to be an "at the market offering," or the ATM Program.

As of March 31, 2026, we had sold an aggregate of 185,837 shares of our common stock under the ATM Program for net proceeds of $6.6 million after deducting commissions and expenses of approximately $0.3 million. The remaining availability under the ATM Program as of March 31, 2026 was approximately $93.1 million.

As of March 31, 2026, we had cash, cash equivalents, restricted cash and marketable securities of approximately $74.7 million, which consisted of $5.0 million in cash and cash equivalents, $0.1 million in restricted cash and $69.5 million in marketable securities. Cash in excess of immediate requirements is invested in accordance with our investment policy, primarily with a view to liquidity and capital preservation.

***Future Funding Requirements***

In December 2024, Complex Therapeutics LLC entered into the 2024 Loan to refinance the Construction Loans secured by the Tarzana facility. As of March 31, 2026, the outstanding principal amount under the 2024 Loan was $85.6 million and unamortized debt issuance costs were $0.6 million. The 2024 Loan bears interest at a fixed rate of 6.35% per annum, with interest-only payments during the term of the 2024 Loan and the principal balance due in full at maturity. The 2024 Loan may be prepaid in whole but not in part. There is no prepayment fee due if the 2024 Loan is prepaid after the 12-month anniversary of the Closing Date. The 2024 Loan has a term of two years with a one-year extension option. The extension option is subject to certain conditions being met, including: (a) no potential default or event of default, (b) payment of a 0.35% extension fee and the costs and expenses of Midland incurred in connection with the extension, (c) replenishing of all reserve funds as reasonably determined by Midland, and (d) compliance with minimum debt yield and debt service coverage ratio requirements. We expect Complex Therapeutics LLC to meet all requirements necessary to exercise the extension to extend the maturity by one year to January 2028, and we expect that written notice to extend the loan will be provided as early as the 2024 Loan permits, which is no sooner than one hundred twenty days from its maturity date and no later than thirty days before its maturity date.

Based on our current operating plan, we believe our existing cash, cash equivalents, restricted cash and marketable securities will be sufficient to fund our operating expenses and capital expenditure requirements beyond 2027.

The accompanying condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. We evaluated our ability to continue as a going concern for the twelve months following the issuance of the condensed consolidated financial statements. As discussed above and in Note 8 to the accompanying condensed consolidated financial statements, the 2024 Loan is due in January 2027, for total principal of $85.6 million, which is in excess of cash, cash equivalents, and marketable securities on hand as of March 31, 2026, which we concluded is an indicator of substantial doubt about our ability to continue as a going concern.

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We plan to exercise our contractual right to extend the maturity of the 2024 Loan to January 2028. In addition, we may seek to refinance or restructure the 2024 Loan, sell the Tarzana facility to repay the 2024 Loan, or seek additional financing in the form of equity or debt instruments. There can be no assurance that new financing or other forms of funding will be available on favorable terms or at all. We concluded that management's plans, including Complex Therapeutics LLC's contractual right to exercise the extension option to January 2028, which is within Complex Therapeutics LLC's control, alleviate the conditions that raise substantial doubt about our ability to continue as a going concern.

We use our cash to fund operations, primarily to fund our business development, research and development expenditures and related personnel costs. We expect our expenses to continue to be significant as we invest in research and development activities, particularly if we in-license or acquire product candidates, advance one or more product candidates into later stages of development and conduct clinical trials, seek regulatory approvals for and commercialize any product candidates that successfully complete clinical trials, hire personnel and invest in and grow our business, expand and protect our intellectual property portfolio, and operate as a public company. Because of the numerous risks and uncertainties associated with acquiring product candidates, and the research, development and commercialization of product candidates, we are unable to estimate the exact timing and amount of our funding requirements. Our future operating expenditures will depend on many factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the extent to which we acquire or in-license other companies' product candidates and technologies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope, rate of progress, costs and results of future clinical and preclinical development activities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs, timing and outcome of regulatory review of any product candidates, and the number of trials required for regulatory approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the cost of manufacturing any product candidates, as well as any products we successfully commercialize;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the cost of commercialization activities of any product candidates, if approved for sale, including marketing, sales and distribution costs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing, receipt and amount of sales of any product candidates, if approved;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to establish and maintain strategic collaborations, licensing or other arrangements and the financial terms of any such arrangements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any product liability or other lawsuits or claims;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the expenses needed to attract, hire and retain skilled personnel;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our investments in our operational, financial and management information systems;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs associated with operating as a public company;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing any intellectual property portfolio we may acquire;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs related to the Tarzana facility; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any delays or issues resulting from the impact of adverse geopolitical and economic conditions.

Until we can generate substantial revenue from sales of a product candidate, if that occurs, we plan to fund our operations through equity offerings, debt financings, leasing income, or other capital sources. This may include strategic collaborations or other arrangements with third parties. Additional funds may not be available to us on acceptable terms or at all. If we raise additional funds by issuing equity or convertible debt securities, our stockholders will suffer dilution, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. Debt financing, if available, may involve restrictive covenants limiting our flexibility in conducting future business activities, and, in the event of insolvency, debt holders would be repaid before holders of our equity securities receive any distribution of our corporate assets. If we raise funds through collaborations or other similar arrangements with third parties, we may have to relinquish

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valuable rights to technologies, future revenue streams, product candidates or research programs or grant licenses on terms that may not be favorable to us and/or may reduce the value of our common stock. Our ability to raise additional funds may be adversely impacted by worsening global economic conditions and the recent disruptions to, and volatility in, the credit and financial markets in the United States and worldwide resulting from, among other things, heightened inflation, fluctuations in interest rates, military conflicts, including in Ukraine and the Middle East, tariffs and recent and potential trade wars. If we fail to obtain necessary capital when needed on acceptable terms, or at all, it could force us to delay, limit, reduce or terminate our product development programs, commercialization efforts or other operations. See "Risk Factors."

***Cash Flows***

The following table sets forth the significant sources and uses of cash for the periods set forth below (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended March 31,** | **Three Months Ended March 31,** |
| | **2026** | **2025** |
| Net cash provided by (used in): |  |  |
| Cash used in operating activities | $(1337) | $(4195) |
| Cash (used in) provided by investing activities | (317) | 9611 |
| Cash provided by financing activities |  | 232 |
| Net (decrease) increase in cash, cash equivalents and restricted cash | $(1654) | $5648 |

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*Cash Flows from Operating Activities*

Cash used in operating activities for the three months ended March 31, 2026 was $1.3 million, which consisted of the net loss of $4.2 million, partially offset by a $1.3 million net change to our net operating assets and liabilities and $1.6 million in non-cash charges and other adjustments to reconcile net loss to net cash used in operating activities. The net change in our operating assets and liabilities was primarily due to a decrease of $1.5 million in prepaid expenses and other current assets, a decrease of $0.1 million in other long-term assets, and an increase of $0.1 million in accrued expenses and other current liabilities, partially offset by an increase of $0.3 million in accrued rent receivable and a decrease of $0.1 million in operating lease liabilities. The non-cash charges primarily consisted of stock-based compensation expense of $1.0 million, non-cash interest expense of $0.2 million, accretion on invested securities of $0.2 million and change in foreign exchange remeasurement of $0.1 million.

Cash used in operating activities for the three months ended March 31, 2025 was $4.2 million, which consisted of the net loss of $28.2 million, partially offset by a $3.6 million net change to our net operating assets and liabilities and $20.4 million in non-cash charges and other adjustments to reconcile net loss to net cash used in operating activities. The net change in our operating assets and liabilities was primarily due to an increase of $6.5 million in prepaid expenses and other current assets, an increase of $1.3 million in accrued rent receivable and other long-term assets, a decrease of $0.2 million in operating lease liabilities, a decrease of $0.4 million in accounts payable, and a decrease of $1.0 million in accrued restructuring liabilities, accrued expenses and other current liabilities. The non-cash charges primarily consisted of stock-based compensation expense of $3.5 million, depreciation expense of $0.5 million, impairment of property, plant and equipment of $16.6 million, and non-cash interest expense of $0.2 million, offset by accretion on invested securities of $0.2 million and change in foreign exchange remeasurement of $0.2 million.

*Cash Flows from Investing Activities*

Cash used in investing activities for the three months ended March 31, 2026 was $0.3 million, consisting of $0.3 million related to purchases of marketable securities.

Cash provided by investing activities for the three months ended March 31, 2025 was $9.6 million, consisting of $9.2 million related to redemptions from marketable securities and $0.4 million of cash received from the sale of assets classified as held for sale.

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*Cash Flows from Financing Activities*

Cash provided by financing activities for the three months ended March 31, 2026 was nil.

Cash provided by financing activities for the three months ended March 31, 2025 was $0.2 million, which was related to proceeds from the exercise of stock options of $0.4 million, offset by loan agreement closing costs of $0.2 million.

**Critical Accounting Policies and Estimates**

This management's discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of the condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the condensed financial statements, as well as the reported expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

For a description of critical accounting policies that require significant judgments and estimates during the preparation of our financial statements, refer to "Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates" and Note 2 to our consolidated financial statements contained in our Annual Report on Form 10-K for the year ended December 31, 2025 and Note 2 to the condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q.

**Recent Accounting Pronouncements**

Information regarding recent accounting pronouncements applicable to us is included in Note 2 to the condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q.

**Emerging Growth Company Status and Smaller Reporting Company Status**

We are an "emerging growth company" as defined in the Jumpstart Our Business Startups Act of 2012, or JOBS Act. For so long as we remain an emerging growth company, we are permitted and intend to rely on certain exemptions from various public company reporting requirements, including not being required to have our internal control over financial reporting audited by our independent registered public accounting firm pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and any golden parachute payments not previously approved. Accordingly, the information contained herein may be different than the information you receive from other public companies in which you hold stock.

In addition, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies. We have elected to avail ourselves of this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that we (i) are no longer an emerging growth company or (ii) affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of public company effective dates.

We will remain an emerging growth company until the earliest of (i) December 31, 2026, (ii) the last day of the fiscal year in which we have total annual gross revenue of at least $1.235 billion, (iii) the last day of the fiscal year in which we are deemed to be a "large accelerated filer" as defined in Rule 12b-2 under the Exchange Act, which would occur if the market value of our common stock held by non-affiliates exceeded $700.0 million as of the

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last business day of the second fiscal quarter of such year or (iv) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three-year period.

We are also a "smaller reporting company," as defined in Rule 12b-2 under the Exchange Act. We may continue to be a smaller reporting company if either (i) the market value of our shares held by non-affiliates is less than $250.0 million or (ii) our annual revenue was less than $100.0 million during the most recently completed fiscal year and the market value of our shares held by non-affiliates is less than $700.0 million. If we are a smaller reporting company at the time we cease to be an emerging growth company, we may continue to rely on exemptions from certain disclosure requirements that are available to smaller reporting companies. Specifically, as a smaller reporting company, we may choose to present only the two most recent fiscal years of audited financial statements in our Annual Report on Form 10-K and, similar to emerging growth companies, smaller reporting companies have reduced disclosure obligations regarding executive compensation.

**Item 3. Quantitative and Qualitative Disclosures About Market Risk**

We are a smaller reporting company as defined by Item 10 of Regulation S-K and are not required to provide the information otherwise required under this item.

**Item 4. Controls and Procedures**

**Evaluation of Disclosure Controls and Procedures**

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of March 31, 2026, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms, and to provide reasonable assurance that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

**Changes in Internal Control Over Financial Reporting**

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

**Inherent Limitations on Effectiveness of Controls**

Our management, including our Chief Executive Officer and Chief Financial Officer, do not expect that our disclosure controls or our internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. The design of any system of controls is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

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**Part II. Other Information**

**Item 1. Legal Proceedings**

From time to time, we may become involved in legal proceedings arising in the ordinary course of our business. We are not currently subject to any material legal proceedings.

**Item 1A. Risk Factors**

There are no material changes to the risk factors set forth in Part I, Item 1A, *Risk Factors* in our Annual Report on Form 10-K for the year ended December 31, 2025.

**Item 2. Unregistered Sales of Equity Securities and Use of Proceeds**

**(a) Recent Sales of Unregistered Equity Securities**

None.

**(b) Use of Proceeds**

Not applicable.

**(c) Issuer Purchases of Equity Securities**

None.

**Item 3. Defaults Upon Senior Securities**

Not applicable.

**Item 4. Mine Safety Disclosures**

Not applicable.

**Item 5. Other Information**

*Director and Officer Trading Arrangements*

None of our directors or executive officers adopted or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K) during the quarterly period covered by this report.

**Item 6. Exhibits**

The exhibits listed on the Exhibit Index are either filed or furnished with this report or incorporated herein by reference.

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| | |
|:---|:---|
| **Exhibit**<br>**Number** | **Description of Exhibit** |
| 3.1 | <u>[Amended and Restated Certificate of Incorporation, as amended (incorporated herein by reference to Exhibit 3.1 to the Company's Annual Report on Form 10-K (File No. 001-40215), filed with the SEC on March 21, 2024)](https://www.sec.gov/Archives/edgar/data/1789769/000178976924000036/amendedandrestatedcertific.htm)</u>.  |
| 3.2 | <u>[Amended and Restated Bylaws (incorporated herein by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K (File No. 001-40215), filed with the SEC on March 23, 2021).](https://www.sec.gov/Archives/edgar/data/1789769/000119312521091216/d131874dex32.htm)</u>  |
| 31.1\* | <u>[Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](a-26ex311certificationofpr.htm)</u> |
| 31.2\* | <u>[Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](a-26ex312certificationofpr.htm)</u> |
| 32.1# | <u>[Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](q1-26ex321certificationceo.htm)</u> |
| 32.2# | <u>[Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](q1-26ex322certificationcfo.htm)</u> |
| 101 | The following financial information from the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 formatted in Inline XBRL (Extensible Business Reporting Language) includes: (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations and Comprehensive Loss, (iii) the Condensed Consolidated Statements of Stockholders' Equity, (iv) the Condensed Consolidated Statements of Cash Flows, and (v) Notes to the Condensed Consolidated Financial Statements. |
| 104 | Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) |

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\*&nbsp;&nbsp;&nbsp;&nbsp;Filed herewith.

#&nbsp;&nbsp;&nbsp;&nbsp;These certifications are being furnished solely to accompany this quarterly report on Form 10-Q pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed "filed" by the registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and are not to be incorporated by reference into any filing of the registrant, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

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**Signatures** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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| | | |
|:---|:---|:---|
| | **INSTIL BIO, INC.** | **INSTIL BIO, INC.** |
| May 15, 2026 | By: | /s/ Sandeep Laumas |
|  |  | Sandeep Laumas<br>Chief Financial Officer and Chief Business Officer<br>*(On behalf of the registrant and in his capacity as Principal Financial Officer and Principal Accounting Officer)* |

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## Exhibit 31.1

**EXHIBIT 31.1** 

**CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER** 

**PURSUANT TO EXCHANGE ACT RULE 13a-14(a)/15d-14(a)** 

**AS ADOPTED PURSUANT TO SECTION 302** 

**OF THE SARBANES-OXLEY ACT OF 2002** 

I, Bronson Crouch, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Instil Bio, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and

 (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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Date: May 15, 2026

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| |
|:---|
| /s/ Bronson Crouch |
| **Bronson Crouch** |
| **Chief Executive Officer (Principal Executive Officer)** |

---

## Exhibit 31.2

**EXHIBIT 31.2** 

**CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER** 

**PURSUANT TO EXCHANGE ACT RULE 13a-14(a)/15d-14(a)** 

**AS ADOPTED PURSUANT TO SECTION 302** 

**OF THE SARBANES-OXLEY ACT OF 2002** 

I, Sandeep Laumas, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Instil Bio, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and

 (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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Date: May 15, 2026

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| |
|:---|
| /s/ Sandeep Laumas |
| **Sandeep Laumas** |
| **Chief Financial Officer and Chief Business Officer (Principal Financial Officer)** |

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## Exhibit 32.1

**Exhibit 32.1**

**CERTIFICATION OF CHIEF EXECUTIVE OFFICER**

**PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the quarterly report of Instil Bio, Inc. (the "Company") on Form 10-Q for the quarter ended March 31, 2026 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Bronson Crouch, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as amended (the "Exchange Act"); and

 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

---

| |
|:---|
| /s/ Bronson Crouch |
| Bronson Crouch |
| Chief Executive Officer |

---

Date: May 15, 2026

This certification shall not be deemed "filed" for purposes of Section 18 of the Exchange Act or otherwise subject to the liability of Section 18 of the Exchange Act. Such certification shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent that the Company specifically incorporates it by reference.

## Exhibit 32.2

**Exhibit 32.2**

**CERTIFICATION OF CHIEF FINANCIAL OFFICER**

**PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the quarterly report of Instil Bio, Inc. (the "Company") on Form 10-Q for the quarter ended March 31, 2026 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Sandeep Laumas, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

 1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as amended (the "Exchange Act"); and

 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

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| |
|:---|
| /s/ Sandeep Laumas |
| Sandeep Laumas |
| Chief Financial Officer and Chief Business Officer |

---

Date: May 15, 2026

This certification shall not be deemed "filed" for purposes of Section 18 of the Exchange Act or otherwise subject to the liability of Section 18 of the Exchange Act. Such certification shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent that the Company specifically incorporates it by reference.

<br>