STOCK TITAN

Kalaris Therapeutics (KLRS) affiliate adds 244,300 KLRS shares

Filing Impact
(Very High)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Kalaris Therapeutics, Inc. reported an insider group transaction where an affiliated investment vehicle, Samsara Opportunity Fund, L.P., bought 244,300 shares of common stock at $4.83 per share in a privately negotiated deal with Samsara BioCapital, L.P.

The filing also records several non-market, pro rata in-kind distributions among related Samsara entities, reallocating a total of 86,314 shares of Kalaris common stock internally. Following the purchase, Samsara Opportunity Fund, L.P. holds 2,224,147 Kalaris shares indirectly associated with director and ten percent owner Dr. Srinivas Akkaraju.

Positive

  • None.

Negative

  • None.
Insider AKKARAJU SRINIVAS, Samsara BioCapital, L.P., Samsara BioCapital GP, LLC, Samsara Opportunity Fund, L.P., Samsara Opportunity Fund GP, LLC
Role null | null | null | null | null
Bought 244,300 shs ($1.18M)
Type Security Shares Price Value
Purchase Common Stock 244,300 $4.83 $1.18M
Other Common Stock 66,906 $0.00 --
Other Common Stock 14,937 $0.00 --
Other Common Stock 4,471 $0.00 --
Holdings After Transaction: Common Stock — 2,224,147 shares (Indirect, By Samsara Opportunity Fund, L.P.)
Footnotes (1)
  1. Represents the purchase of shares from Samsara BioCapital, L.P. ("Samsara LP") in a privately negotiated transaction. Securities are directly held by Samsara Opportunity Fund, L.P. ("Samsara Opportunity Fund"). Samsara Opportunity Fund GP, LLC ("Samsara Opportunity GP") is the general partner of Samsara Opportunity Fund and may be deemed to beneficially own the securities held by Samsara Opportunity Fund. Dr. Srinivas Akkaraju, MD, Ph.D. has voting and investment power over the securities held by Samsara Opportunity Fund and, accordingly, may be deemed to beneficially own the securities held by Samsara Opportunity Fund. Each of the Reporting Persons disclaims beneficial ownership in these securities except to the extent of its or his pecuniary interest therein. Represents a pro rata, in-kind distribution, without additional consideration, and not a purchase or sale of securities, by Samsara LP in respect of redeemed interests in Samsara LP. Of the shares distributed by Samsara LP, (i) 47,498 were distributed to redeeming limited partners, (ii) 14,937 shares were distributed to Samsara BioCapital GP, LLC ("Samsara LLC"), the general partner of Samsara LP, in respect of redeemed interests of non-managing members of Samsara LLC that were retained by Samsara LLC, and (iii) 4,471 shares were distributed to Samsara BioCapital Partners, L.P. ("Samsara BioCapital Partners"), in respect of the redeemed interest of a limited partner of Samsara LP that has been acquired by Samsara BioCapital Partners. The shares held by Samsara LP reflects the disposition of 244,300 shares, to Samsara Opportunity Fund as described in footnote (1), in which each of Samsara LLC and Dr. Akkaraju had no pecuniary interest. Securities are held by Samsara LP. Samsara LLC is the general partner of Samsara LP and may be deemed to beneficially own the shares held by Samsara LP. Dr. Akkaraju has voting and investment power over the shares held by Samsara LP and, accordingly, may be deemed to beneficially own the shares held by Samsara LP. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein. Represents receipt of shares in the distribution in kind described in footnote (3). Securities are held by Samsara LLC. Dr. Akkaraju has voting and investment power over the shares held by Samsara LLC and, accordingly, may be deemed to beneficially own the shares held by Samsara LLC. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein. Securities are held by Samsara BioCapital Partners. Dr. Akkaraju has voting and investment power over the shares held by Samsara BioCapital Partners and, accordingly, may be deemed to beneficially own the shares held by Samsara BioCapital Partners. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein.
Insider purchase size 244,300 shares Common stock bought by Samsara Opportunity Fund, L.P.
Purchase price $4.83 per share Privately negotiated transaction with Samsara BioCapital, L.P.
Post-transaction holdings 2,224,147 shares Kalaris common stock held by Samsara Opportunity Fund, L.P.
Restructuring-related shares 86,314 shares Pro rata, in-kind distributions among Samsara entities
Shares distributed to Samsara GP LLC 14,937 shares Received in in-kind distribution from Samsara BioCapital, L.P.
Shares distributed to Samsara BioCapital Partners 4,471 shares Received in in-kind distribution from Samsara BioCapital, L.P.
open-market purchase financial
"Purchase in open market or private transaction"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
privately negotiated transaction financial
"purchase of shares from Samsara BioCapital, L.P. in a privately negotiated transaction"
A privately negotiated transaction is a deal whose terms are worked out directly between a buyer and a seller rather than through a public market or open auction. Think of it like selling a car to a neighbor instead of putting it on eBay: the price, timing and conditions are agreed one-on-one, so investors may see less public information, different pricing compared with market trades, and potential impacts on liquidity and valuation.
pro rata, in-kind distribution financial
"Represents a pro rata, in-kind distribution, without additional consideration"
beneficially own financial
"may be deemed to beneficially own the securities held by Samsara Opportunity Fund"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
pecuniary interest financial
"disclaims beneficial ownership in these securities except to the extent of its or his pecuniary interest therein"
SEC Form 4
FORM 4UNITED 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*
AKKARAJU SRINIVAS

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Kalaris Therapeutics, Inc. [ KLRS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/20/2026P(1)244,300A$4.832,224,147IBy Samsara Opportunity Fund, L.P.(2)
Common Stock05/20/2026J(3)66,906D$010,657,028(4)IBy Samsara BioCapital, L.P.(5)
Common Stock05/20/2026J(6)14,937A$014,937IBy Samsara BioCapital GP, LLC(7)
Common Stock05/20/2026J(6)4,471A$019,408IBy Samsara BioCapital Partners, L.P.(8)
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
1. Name and Address of Reporting Person*
AKKARAJU SRINIVAS

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
XDirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Samsara BioCapital, L.P.

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Samsara BioCapital GP, LLC

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Samsara Opportunity Fund, L.P.

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Samsara Opportunity Fund GP, LLC

(Last)(First)(Middle)
C/O SAMSARA BIOCAPITAL, LLC
628 MIDDLEFIELD ROAD

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. Represents the purchase of shares from Samsara BioCapital, L.P. ("Samsara LP") in a privately negotiated transaction.
2. Securities are directly held by Samsara Opportunity Fund, L.P. ("Samsara Opportunity Fund"). Samsara Opportunity Fund GP, LLC ("Samsara Opportunity GP") is the general partner of Samsara Opportunity Fund and may be deemed to beneficially own the securities held by Samsara Opportunity Fund. Dr. Srinivas Akkaraju, MD, Ph.D. has voting and investment power over the securities held by Samsara Opportunity Fund and, accordingly, may be deemed to beneficially own the securities held by Samsara Opportunity Fund. Each of the Reporting Persons disclaims beneficial ownership in these securities except to the extent of its or his pecuniary interest therein.
3. Represents a pro rata, in-kind distribution, without additional consideration, and not a purchase or sale of securities, by Samsara LP in respect of redeemed interests in Samsara LP. Of the shares distributed by Samsara LP, (i) 47,498 were distributed to redeeming limited partners, (ii) 14,937 shares were distributed to Samsara BioCapital GP, LLC ("Samsara LLC"), the general partner of Samsara LP, in respect of redeemed interests of non-managing members of Samsara LLC that were retained by Samsara LLC, and (iii) 4,471 shares were distributed to Samsara BioCapital Partners, L.P. ("Samsara BioCapital Partners"), in respect of the redeemed interest of a limited partner of Samsara LP that has been acquired by Samsara BioCapital Partners.
4. The shares held by Samsara LP reflects the disposition of 244,300 shares, to Samsara Opportunity Fund as described in footnote (1), in which each of Samsara LLC and Dr. Akkaraju had no pecuniary interest.
5. Securities are held by Samsara LP. Samsara LLC is the general partner of Samsara LP and may be deemed to beneficially own the shares held by Samsara LP. Dr. Akkaraju has voting and investment power over the shares held by Samsara LP and, accordingly, may be deemed to beneficially own the shares held by Samsara LP. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein.
6. Represents receipt of shares in the distribution in kind described in footnote (3).
7. Securities are held by Samsara LLC. Dr. Akkaraju has voting and investment power over the shares held by Samsara LLC and, accordingly, may be deemed to beneficially own the shares held by Samsara LLC. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein.
8. Securities are held by Samsara BioCapital Partners. Dr. Akkaraju has voting and investment power over the shares held by Samsara BioCapital Partners and, accordingly, may be deemed to beneficially own the shares held by Samsara BioCapital Partners. Each of the Reporting Persons disclaims beneficial ownership in these shares except to the extent of its or his respective pecuniary interest therein.
/s/ Srinivas Akkaraju05/22/2026
Samsara BioCapital, L.P., By: Samsara BioCapital GP, LLC, its General Partner, By /s/ Srinivas Akkaraju, Managing Member05/22/2026
Samsara BioCapital GP, LLC, By /s/ Srinivas Akkaraju, Managing Member05/22/2026
Samsara Opportunity Fund, L.P., By Samsara Opportunity Fund GP, LLC, its General Partner, By /s/ Srinivas Akkaraju, Managing Member05/22/2026
Samsara Opportunity Fund GP, LLC, By /s/ Srinivas Akkaraju, Managing Member05/22/2026
** Signature of Reporting PersonDate
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)

FAQ

What insider transaction did Kalaris Therapeutics (KLRS) report in this Form 4?

Kalaris Therapeutics reported that Samsara Opportunity Fund, L.P., an affiliated entity, bought 244,300 shares of common stock at $4.83 per share. This acquisition came via a privately negotiated transaction with Samsara BioCapital, L.P., increasing the fund’s indirect stake in KLRS.

Who is behind the Kalaris Therapeutics (KLRS) share purchase in this filing?

The purchase was made by Samsara Opportunity Fund, L.P., whose general partner is Samsara Opportunity Fund GP, LLC. Director and ten percent owner Dr. Srinivas Akkaraju exercises voting and investment power over this fund and may be deemed to beneficially own its Kalaris Therapeutics shares.

How many Kalaris Therapeutics (KLRS) shares does Samsara Opportunity Fund hold after the transaction?

After the reported transaction, Samsara Opportunity Fund, L.P. holds 2,224,147 shares of Kalaris Therapeutics common stock. This position reflects the newly acquired 244,300 shares purchased at $4.83 each, combined with the fund’s previously held KLRS shares.

Was the KLRS insider transaction an open-market trade or a private deal?

The 244,300-share KLRS purchase was executed as a privately negotiated transaction between Samsara Opportunity Fund, L.P. and Samsara BioCapital, L.P. It is coded as a purchase transaction rather than an in-kind distribution or routine administrative transfer among related entities.

What are the pro rata in-kind distributions mentioned in the Kalaris (KLRS) Form 4?

The filing describes a pro rata, in-kind distribution of 86,314 Kalaris shares by Samsara BioCapital, L.P. to its investors and affiliates. These distributions, made without additional consideration, reallocated shares to limited partners, Samsara BioCapital GP, LLC, and Samsara BioCapital Partners, L.P.

Does Dr. Srinivas Akkaraju personally trade KLRS shares in this Form 4?

The transactions involve entities associated with Dr. Srinivas Akkaraju rather than his direct personal account. He has voting and investment power over shares held by Samsara entities and may be deemed a beneficial owner, but each reporting person disclaims ownership beyond its or his pecuniary interest.