Filing Details
- Accession Number:
- 0001214659-25-004290
- Form Type:
- 13D Filing
- Publication Date:
- 2025-03-11 20:00:00
- Filed By:
- Tang Capital Management
- Company:
- Acelyrin Inc.
- Filing Date:
- 2025-03-12
- SEC Url:
- 13D Filing
Ownership Summary
Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.
| Name | Sole Voting Power | Shared Voting Power | Sole Dispositive Power | Shared Dispositive Power | Aggregate Amount Owned Power | Percent of Class |
|---|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT, LLC | 0 | 8,824,693 | 0 | 8,824,693 | 8,824,693 | 8.8% |
| KEVIN TANG | 0 | 8,824,693 | 0 | 8,824,693 | 8,824,693 | 8.8% |
| TANG CAPITAL PARTNERS, LP | 0 | 4,963,009 | 0 | 4,963,009 | 4,963,009 | 5.0% |
| TANG CAPITAL PARTNERS INTERNATIONAL, LP | 0 | 3,861,684 | 0 | 3,861,684 | 3,861,684 | 3.8% |
| TANG CAPITAL PARTNERS III, INC | 0 | 0 | 0 | 0 | 0 | 0% |
| TANG CAPITAL PARTNERS IV, INC | 0 | 0 | 0 | 0 | 0 | 0% |
| CONCENTRA BIOSCIENCES, LLC | 0 | 0 | 0 | 0 | 0 | 0% |
Filing
|
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 2)
|
Acelyrin, Inc. (Name of Issuer) |
Common Stock, par value $0.00001 per share (Title of Class of Securities) |
00445A100 (CUSIP Number) |
Kevin Tang 4747 Executive Drive, Suite 210 San Diego, CA, 92121 858-200-3830 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
03/10/2025 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.
The information required on 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).
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
TANG CAPITAL MANAGEMENT, LLC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
8,824,693.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
8.8 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Tang Capital Management, LLC ("TCM") shares voting and dispositive power over such shares with Tang Capital Partners, LP ("TCP"), Tang Capital Partners International, LP ("TCPI") and Kevin Tang. The percentages used herein are based on 100,325,569 shares of Common Stock outstanding as of November 8, 2024, as set forth in the Issuer's Quarterly Report filed on Form 10-Q that was filed with the Securities and Exchange Commission on November 13, 2024.
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
KEVIN TANG | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
UNITED STATES
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
8,824,693.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
8.8 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
IN |
Comment for Type of Reporting Person:
Kevin Tang shares voting and dispositive power over such shares with TCP, TCPI and TCM.
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
TANG CAPITAL PARTNERS, LP | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
4,963,009.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
5.0 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person:
TCP shares voting and dispositive power over such shares with TCM and Kevin Tang.
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
TANG CAPITAL PARTNERS INTERNATIONAL, LP | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
3,861,684.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
3.8 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person:
TCPI shares voting and dispositive power over such shares with TCM and Kevin Tang.
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
TANG CAPITAL PARTNERS III, INC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
NEVADA
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
CO |
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
TANG CAPITAL PARTNERS IV, INC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
NEVADA
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
CO |
SCHEDULE 13D
|
| CUSIP No. | 00445A100 |
| 1 |
Name of reporting person
CONCENTRA BIOSCIENCES, LLC | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b)
| ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
WC | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
| ||||||||
| 6 | Citizenship or place of organization
DELAWARE
| ||||||||
| Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
| 11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
| ||||||||
| 13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
OO |
SCHEDULE 13D
|
| Item 1. | Security and Issuer | |
| (a) | Title of Class of Securities:
Common Stock, par value $0.00001 per share | |
| (b) | Name of Issuer:
Acelyrin, Inc. | |
| (c) | Address of Issuer's Principal Executive Offices:
4149 LIBERTY CANYON RD., AGOURA HILLS,
CALIFORNIA
, 91301. | |
Item 1 Comment:
This Schedule 13D/A (this "Statement") amends the Schedule 13D (the "Original Schedule 13D") filed on February 20, 2025, as amended on February 27, 2025. Items 3, 5 and 7 of the Statement are hereby amended and supplemented to the extent hereinafter expressly set forth. Except as amended hereby, the original disclosure set forth in the Statement shall remain unchanged. All capitalized terms used and not expressly defined herein have the respective meanings ascribed to such terms in the Original Schedule 13D. | ||
| Item 3. | Source and Amount of Funds or Other Consideration | |
Item 3 of the Original Schedule 13D is hereby amended to add the following:
Since February 27, 2025 the Reporting persons have expended an aggregate of approximately $4.1 million to purchase 1,526,365 shares of the Issuer's Common Stock through the open market. The Common Stock was acquired in the ordinary course of business. | ||
| Item 5. | Interest in Securities of the Issuer | |
| (a) | The information previously provided in response to Item 5 is hereby amended and restated by replacing the text thereof in its entirety with the following:
The information set forth in the cover pages of this Schedule 13D is hereby incorporated by reference into this Item 5. As of the date hereof the Reporting Persons beneficially own an aggregate of 8,824,693 shares of the Issuer's Common Stock, representing 8.8% of the outstanding shares. | |
| (b) | See item 5(a) above. | |
| (c) | Schedule A attached hereto as Exhibit 3 describes all transactions in the Issuer's Common Stock that were effected during the past 60 days by the Reporting Persons. | |
| (d) | No person other than a Reporting Person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, Common Stock beneficially owned by the Reporting Persons. | |
| (e) | Not applicable | |
| Item 7. | Material to be Filed as Exhibits. | |
Exhibit 1: Joint Filing Agreement by and among the Reporting Persons (filed as Exhibit 1 of the 13D filed on February 20, 2025 by the Reporting Persons with respect to the Common Stock of the Issuer).
Exhibit 2: Acquisition Proposal, dated February 20, 2025, sent from Concentra to the Issuer (filed as Exhibit 2 of the 13D filed on February 20, 2025 by the Reporting Persons with respect to the Common Stock of the Issuer).
Exhibit 3: Schedule A: Transactions during the past 60 days (as amended). | ||
| SIGNATURE | |
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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