Bolt Biotherapeutics: Coastlands buys 50,000 shares

The purchase was made in multiple transactions at prices ranging from $6.3618 to $6.4044 per share.

Available on EDGAR 11/10/2026 - 02:57 PM EST Accepted by SEC EDGAR 11/10/2026 - 02:57 PM EST

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Form Type

Rhea-AI Filing Summary

Bolt Biotherapeutics, Inc. (BOLT) ten-percent owner Coastlands Capital LP indirectly purchased 50,000 common shares on November 9, 2026, at a weighted average $6.38 per share. The purchase comprised multiple transactions priced from $6.3618 to $6.4044 per share; Coastlands Capital LP reported 462,416 shares following the purchase. No Rule 10b5-1 plan is reported. A footnote identifies Matthew Perry as control person of Coastlands and related entities and says reporting persons disclaim beneficial ownership except to the extent of their pecuniary interest.

Insider Trade Summary

Net Buyer: 50,000 shares

Net Buy 1 txn

Insider Coastlands Capital LP

Role 10% Owner

Bought 50,000 shs ($319K)

Type	Security	Shares	Price	Value
Purchase	Common Stock ^{F1, F2}	50,000	$6.38	$319K

Holdings After Transaction: Common Stock — 462,416 shares (Indirect, By Coastlands Capital LP)

Footnotes (2)

F1. The price reported represents the weighted average purchase price per share. The shares were purchased in multiple transactions at prices ranging from $6.3618 to $6.4044. Upon request by the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, the reporting persons will provide full information regarding the number of shares purchased at each separate price.
F2. Coastlands Capital LP ("Coastlands") and Coastlands Capital GP LLC (the "General Partner") are the investment adviser and general partner, respectively, of Coastlands Capital Partners LP, a Delaware limited partnership (the "Partnership"). Coastlands Capital LLC ("Coastlands GP") is the general partner of Coastlands. Matthew Perry is the control person of Coastlands, the Partnership, Coastlands GP and the General Partner. The reporting persons are filing this Form 4 jointly, but not as members of a group, and each disclaims membership in a group. Each reporting person also disclaims beneficial ownership of common stock except to the extent of that person's pecuniary interest therein.

Key Figures

Shares purchased: 50,000 shares Weighted average purchase price: $6.38 per share Purchase price range: $6.3618 to $6.4044 per share +1 more

4 metrics

Shares purchased 50,000 shares Coastlands Capital LP purchase on November 9, 2026

Weighted average purchase price $6.38 per share Coastlands Capital LP purchase on November 9, 2026

Purchase price range $6.3618 to $6.4044 per share Multiple transactions on November 9, 2026

Shares following transaction 462,416 shares Coastlands Capital LP reported position

Key Terms

weighted average purchase price, beneficial ownership, pecuniary interest

3 terms

weighted average purchase price financial

"The price reported represents the weighted average purchase price per share"

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

beneficial ownership regulatory

"disclaims beneficial ownership of common stock"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"except to the extent of that person's pecuniary interest therein"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many BOLT shares did Coastlands Capital LP buy, and at what price?

Coastlands Capital LP purchased 50,000 BOLT common shares on November 9, 2026, at a weighted average price of $6.38 per share. The shares were purchased in multiple transactions at prices ranging from $6.3618 to $6.4044 per share.

How many BOLT shares did Coastlands Capital LP hold after the purchase?

Coastlands Capital LP reported 462,416 shares following the purchase. The transaction is listed as indirect ownership by Coastlands Capital LP.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Coastlands Capital LP

(Last)

(First)

(Middle)

601 CALIFORNIA STREET

SUITE 1210

(Street)

SAN FRANCISCO

CALIFORNIA

94108

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Bolt Biotherapeutics, Inc. [ BOLT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/09/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/09/2026		P		50,000	A	$6.38⁽¹⁾	462,416	I	By Coastlands Capital LP⁽²⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The price reported represents the weighted average purchase price per share. The shares were purchased in multiple transactions at prices ranging from $6.3618 to $6.4044. Upon request by the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, the reporting persons will provide full information regarding the number of shares purchased at each separate price.

2. Coastlands Capital LP ("Coastlands") and Coastlands Capital GP LLC (the "General Partner") are the investment adviser and general partner, respectively, of Coastlands Capital Partners LP, a Delaware limited partnership (the "Partnership"). Coastlands Capital LLC ("Coastlands GP") is the general partner of Coastlands. Matthew Perry is the control person of Coastlands, the Partnership, Coastlands GP and the General Partner. The reporting persons are filing this Form 4 jointly, but not as members of a group, and each disclaims membership in a group. Each reporting person also disclaims beneficial ownership of common stock except to the extent of that person's pecuniary interest therein.

	/s/ Mark Shamia, Chief Operating Officer of the General Partner of Coastlands Capital LP	11/10/2026
	/s/ Mark Shamia, Chief Operating Officer of the General Partner of Coastlands Capital Partners LP	11/10/2026
	/s/ Mark Shamia, Chief Operating Officer of Coastlands Capital GP LLC	11/10/2026
	/s/ Mark Shamia, Chief Operating Officer of Coastlands Capital LLC	11/10/2026
	/s/ Matthew D. Perry	11/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR