# EDGAR Filing Document

**Accession Number:** 0001300336
**File Stem:** 0001104659-23-005733
**Filing Date:** 2023-1
**Character Count:** 19662
**Document Hash:** 4cb84950ca8027ea412b7fca1847b900
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-23-005733.hdr.sgml**: 20230123

**ACCESSION NUMBER**: 0001104659-23-005733

**CONFORMED SUBMISSION TYPE**: SC 13G/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230123

**DATE AS OF CHANGE**: 20230123

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Rallybio Corp
- **CENTRAL INDEX KEY:** 0001739410
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 851083789
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92742
- **FILM NUMBER:** 23543478

**BUSINESS ADDRESS:**
- **STREET 1:** 234 CHURCH STREET
- **STREET 2:** SUITE 1020
- **CITY:** NEW HAVEN
- **STATE:** CT
- **ZIP:** 06510
- **BUSINESS PHONE:** 203- 859-3820

**MAIL ADDRESS:**
- **STREET 1:** 234 CHURCH STREET
- **STREET 2:** SUITE 1020
- **CITY:** NEW HAVEN
- **STATE:** CT
- **ZIP:** 06510

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Rallybio Holdings, LLC
- **DATE OF NAME CHANGE:** 20180502
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Tekla Capital Management LLC
- **CENTRAL INDEX KEY:** 0001300336
- **IRS NUMBER:** 010628853
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A

**BUSINESS ADDRESS:**
- **STREET 1:** 100 FEDERAL STREET
- **STREET 2:** 19TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617 772-8500

**MAIL ADDRESS:**
- **STREET 1:** 100 FEDERAL STREET
- **STREET 2:** 19TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Hambrecht & Quist Capital Management LLC
- **DATE OF NAME CHANGE:** 20040811

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| |
|:---|
| **UNITED STATES** |
| **SECURITIES AND EXCHANGE COMMISSION** |
| **Washington, D.C. 20549** |

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**SCHEDULE 13G**

**Under the Securities Exchange Act of 1934<br> (Amendment No. 1)\***

**Rallybio Corp.**

(Name of Issuer)

**Common Stock**

(Title of Class of Securities)

**75120L100**

(CUSIP Number)

**December 31, 2022**

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

⌧ Rule 13d-1(b) <br> ◻ Rule 13d-1(c) <br> ◻ Rule 13d-1(d)

\*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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| | | | | |
|:---|:---|:---|:---|:---|
| CUSIP No. | CUSIP No. | CUSIP No. | CUSIP No. | CUSIP No. |
| 1. | Names of Reporting Persons<br> Tekla Capital Management LLC | Names of Reporting Persons<br> Tekla Capital Management LLC | Names of Reporting Persons<br> Tekla Capital Management LLC | Names of Reporting Persons<br> Tekla Capital Management LLC |
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) |
|  | (a) | (a) | ◻ | ◻ |
|  | (b) | (b) | ◻ | ◻ |
| 3. | SEC Use Only | SEC Use Only | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 5. | 5. | Sole Voting Power <br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 6. | 6. | Shared Voting Power <br> 1,727,067 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 7. | 7. | Sole Dispositive Power <br> 1,727,067 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 8. | 8. | Shared Dispositive Power <br> 0 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| 11. | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% |
| 12. | Type of Reporting Person (See Instructions)<br> IA, CO | Type of Reporting Person (See Instructions)<br> IA, CO | Type of Reporting Person (See Instructions)<br> IA, CO | Type of Reporting Person (See Instructions)<br> IA, CO |

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| | | | | |
|:---|:---|:---|:---|:---|
| CUSIP No. | CUSIP No. | CUSIP No. | CUSIP No. | CUSIP No. |
| 1. | Names of Reporting Persons<br> Daniel R. Omstead | Names of Reporting Persons<br> Daniel R. Omstead | Names of Reporting Persons<br> Daniel R. Omstead | Names of Reporting Persons<br> Daniel R. Omstead |
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) | Check the Appropriate Box if a Member of a Group (See Instructions) |
|  | (a) | (a) | ◻ | ◻ |
|  | (b) | (b) | ◻ | ◻ |
| 3. | SEC Use Only | SEC Use Only | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware | Citizenship or Place of Organization <br> Delaware |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 5. | 5. | Sole Voting Power <br> 0 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 6. | 6. | Shared Voting Power <br> 1,727,067 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 7. | 7. | Sole Dispositive Power <br> 1,727,067 |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With |  |  |  |
| Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | Number of<br> Shares<br> Beneficially<br> Owned by<br> Each<br> Reporting<br> Person With | 8. | 8. | Shared Dispositive Power <br> 0 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 | Aggregate Amount Beneficially Owned by Each Reporting Person<br> 1,727,067 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ◻ |
| 11. | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% | Percent of Class Represented by Amount in Row (9)<br> 4.6% |
| 12. | Type of Reporting Person (See Instructions)<br> IN, HC | Type of Reporting Person (See Instructions)<br> IN, HC | Type of Reporting Person (See Instructions)<br> IN, HC | Type of Reporting Person (See Instructions)<br> IN, HC |

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| | | | |
|:---|:---|:---|:---|
| **Item 1.** | **Item 1.** | **Item 1.** | **Item 1.** |
|  | (a) | Name of Issuer<br> Rallybio Corp. | Name of Issuer<br> Rallybio Corp. |
|  | (b) | Address of Issuer's Principal Executive Offices<br> 234 Church Street, Suite 1020, New Haven, CT 06510 | Address of Issuer's Principal Executive Offices<br> 234 Church Street, Suite 1020, New Haven, CT 06510 |
| **Item 2.** | **Item 2.** | **Item 2.** | **Item 2.** |
|  | (a) | Name of Person Filing<br> Tekla Capital Management LLC | Name of Person Filing<br> Tekla Capital Management LLC |
|  | (b) | Address of Principal Business Office or, if none, Residence<br> 100 Federal Street, 19th Floor, Boston, MA 02110 | Address of Principal Business Office or, if none, Residence<br> 100 Federal Street, 19th Floor, Boston, MA 02110 |
|  | (c) | Citizenship<br> Delaware Corporation | Citizenship<br> Delaware Corporation |
|  | (d) | Title of Class of Securities<br> Common Stock | Title of Class of Securities<br> Common Stock |
|  | (e) | CUSIP Number<br> 75120L100 | CUSIP Number<br> 75120L100 |
| **Item 3.** | **If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:** | **If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:** | **If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:** |
|  | (a) | ◻ | Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o); |
|  | (b) | ◻ | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c); |
|  | (c) | ◻ | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c); |
|  | (d) | ◻ | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8); |
|  | (e) | ⌧ | An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E); |
|  | (f) | ◻ | An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F); |
|  | (g) | ⌧ | A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G); |
|  | (h) | ◻ | A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); |
|  | (i) | ◻ | A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); |
|  | (j) | ◻ | A non-U.S. institution in accordance with § 240.13d–1(b)(1)(ii)(J); |
|  | (k) | ◻ | Group, in accordance with § 240.13d–1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with § 240.13d–1(b)(1)(ii)(J), please specify the type of institution:____________________________ |

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| | | | |
|:---|:---|:---|:---|
| **Item 4.** | **Ownership** | **Ownership** | **Ownership** |
| Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. | Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. | Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. | Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. |
|  | (a) | Amount beneficially owned: <br> 1,727,067 | Amount beneficially owned: <br> 1,727,067 |
|  | (b) | Percent of class: <br> 4.6% | Percent of class: <br> 4.6% |
|  | (c) | Number of shares as to which the person has:  | Number of shares as to which the person has:  |
|  |  | (i) | Sole power to vote or to direct the vote<br> 0 |
|  |  | (ii) | Shared power to vote or to direct the vote<br> 1,727,067 |
|  |  | (iii) | Sole power to dispose or to direct the disposition of<br> 1,727,067 |
|  |  | (iv) | Shared power to dispose or to direct the disposition of<br> 0 |
| **Item 5.** | **Ownership of Five Percent or Less of a Class** | **Ownership of Five Percent or Less of a Class** | **Ownership of Five Percent or Less of a Class** |
| If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ⌧. | If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ⌧. | If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ⌧. | If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ⌧. |
| **Item 6.** | **Ownership of More than Five Percent on Behalf of Another Person** | **Ownership of More than Five Percent on Behalf of Another Person** | **Ownership of More than Five Percent on Behalf of Another Person** |
| Not applicable. | Not applicable. | Not applicable. | Not applicable. |
| **Item 7.** | **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person** | **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person** | **Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person** |
| See attached Exhibit A. | See attached Exhibit A. | See attached Exhibit A. | See attached Exhibit A. |
| **Item 8.** | **Identification and Classification of Members of the Group** | **Identification and Classification of Members of the Group** | **Identification and Classification of Members of the Group** |
| Not applicable. | Not applicable. | Not applicable. | Not applicable. |
| **Item 9.** | **Notice of Dissolution of Group** | **Notice of Dissolution of Group** | **Notice of Dissolution of Group** |
| N/A | N/A | N/A | N/A |

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| | |
|:---|:---|
| **Item 10.** | **Certification** |
| By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. | By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. |

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**Signatures**

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

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| | | |
|:---|:---|:---|
|  | **Tekla Capital Management LLC** | **Tekla Capital Management LLC** |
| Dated: January 23, 2023 | By: | /s/ Laura Woodward |
|  | Name/Title: | Laura Woodward, Treasurer |

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| | | |
|:---|:---|:---|
|  | **Daniel R. Omstead** | **Daniel R. Omstead** |
| Dated: January 23, 2023 | By: | /s/ Daniel R. Omstead |
|  | Name: | Daniel R. Omstead |

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Exhibit A

Tekla Capital Management LLC ("TCM"), an investment adviser registered pursuant to Section 203 of the Investment Advisers Act of 1940, is the beneficial owner of 1,727,067 shares (or 4.6%) of the Common Stock of Rallybio Corp. (the "Company") as a result of acting as investment adviser to Tekla Healthcare Investors ("HQH"), Tekla Life Sciences Investors ("HQL") and Tekla Healthcare Opportunities Fund ("THQ"), each of which is registered as an investment company pursuant to Section 8 of the Investment Company Act of 1940. Each of TCM and Daniel R. Omstead, through his control of TCM, has sole power to dispose of the 1,727,067 shares beneficially owned by HQH, HQL and THQ. Neither TCM nor Daniel R. Omstead has the sole power to vote or direct the vote of the shares beneficially owned by HQH, HQL and THQ, which power resides in each fund's Board of Trustees. TCM carries out the voting of the shares under written guidelines established by each fund's Board of Trustees.

## Exhibit 99.1

**Exhibit 99.1**

Joint Filing Agreement

The undersigned persons, on January 23, 2023, agree and consent to the joint filing on their behalf of this Schedule 13G in connection with their beneficial ownership of the Common Stock of Rallybio Corp. on December 31, 2022.

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| | |
|:---|:---|
| Tekla Capital Management LLC | Tekla Capital Management LLC |
| By | /s/ Laura Woodward |
| Laura Woodward | Laura Woodward |
| Daniel R. Omstead | Daniel R. Omstead |
| By | /s/ Daniel R. Omstead |
| Daniel R. Omstead | Daniel R. Omstead |

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