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Baker Bros details Prelude Therapeutics (NASDAQ: PRLD) stake and warrant purchase

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Baker Bros. Advisors filed an amended Schedule 13D reporting beneficial ownership of 10,295,301 shares of Prelude Therapeutics common stock, representing 15.5% of the class. This reflects participation in an April 2026 offering of 18,018,014 common shares and prefunded warrants to purchase 2,252,252 shares at $4.4399 each, alongside a $4.44 common share price.

The filing explains that these prefunded warrants and separate non-voting common stock are subject to ownership caps of 4.99% and 9.99%, adjustable up to 19.99% with 61 days’ notice. It also describes option grants to Baker-affiliated directors, an omnibus option amendment tying exercisability to a current adviser representative, and a director lock-up running from April 20 to June 19, 2026.

Positive

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Insights

Baker Bros. reports a 15.5% PRLD stake and structured warrant, option, and lock-up terms.

Baker Bros. Advisors and related entities report beneficial ownership of 10,295,301 Prelude Therapeutics shares, or 15.5% of the company, based on 66,243,507 common shares outstanding plus specified director options. This confirms a large, institutionally managed position with centralized voting and investment control.

The group participated in an April 2026 offering that included 18,018,014 common shares at $4.44 and prefunded warrants for 2,252,252 shares at $4.4399. Those warrants and separate non-voting stock are constrained by a 4.99% “Maximum Percentage” and 9.99% “Beneficial Ownership Limitation,” each adjustable up to 19.99% after 61 days, which shapes how quickly economic exposure can translate into voting power.

The filing also outlines director-related stock options, an omnibus option amendment that ties option exercisability to the tenure of an adviser representative on the board, and a lock-up restricting Dr. Scherer’s sales from April 20, 2026 through June 19, 2026. These mechanics emphasize long-horizon alignment and structured liquidity rather than near-term trading signals; the overall impact is informative but not thesis-changing.

Beneficial ownership 10,295,301 shares Shares of Prelude Therapeutics common stock beneficially owned by Baker Bros. group
Ownership percentage 15.5% of class Based on 66,243,507 Prelude common shares outstanding as of April 21, 2026
Equity offering size 18,018,014 shares Prelude April 2026 public common stock offering at $4.44 per share
Prefunded warrants purchased 2,252,252 warrants 667 and Life Sciences aggregate purchase at $4.4399 per prefunded warrant
Non-voting stock ownership cap 9.99% limit Beneficial Ownership Limitation on conversion of non-voting common stock, adjustable up to 19.99%
Warrant exercise cap 4.99% limit Maximum Percentage for prefunded warrant exercise, adjustable up to 19.99%
Director option grant 76,000 options at $1.04 Stock options held by Dr. Scherer, expiring June 11, 2035, with staged vesting
Director lock-up period Apr 20–Jun 19, 2026 Period during which Dr. Scherer agreed not to transfer or hedge specified securities
Prefunded Warrants financial
"prefunded warrants to purchase up to 2,252,252 shares of the Issuer's Common Stock"
Prefunded warrants are a security that gives the holder the right to convert the warrant into a share after paying a very small remaining amount because almost the full purchase price was paid upfront. They matter to investors because exercising them increases the company’s outstanding shares (dilution) and can provide immediate cash to the issuer while allowing holders to bypass ownership limits or simplify timing, similar to buying a nearly-complete gift card that only needs a tiny top-up to use.
Non-Voting Common Stock financial
"non-voting common stock of the Issuer convertible on a 1-for-1 basis"
A non-voting common stock is an ownership share in a company that gives holders the same economic rights as regular shares—such as claiming a portion of profits and benefiting from price gains—but does not give the holder the right to vote on corporate decisions. Think of it like owning a seat on a train that shares the ride’s benefits but not the ability to steer the engine; investors care because it affects their influence over management, potential control disputes, and sometimes the stock’s price or attractiveness.
Beneficial Ownership Limitation regulatory
"would beneficially own ... no more than 9.99% of the outstanding shares of Common Stock (the "Beneficial Ownership Limitation")"
A beneficial ownership limitation is a rule that caps the percentage of a company’s shares an investor can be treated as owning or controlling for voting, regulatory or tax purposes. It matters to investors because it can restrict how many shares a person or group can buy or vote, affect takeover chances, and influence share liquidity and value — like a speed limit that prevents any single driver from taking over the whole road.
Maximum Percentage regulatory
"would beneficially own ... no more than 4.99% of the outstanding shares of Common Stock (the "Maximum Percentage")"
Lock-Up Agreement financial
"entered into a Lock-Up Agreement (the "Director Lock-Up Agreement") pursuant to which, subject to specified exceptions"
A lock-up agreement is a contract that prevents company insiders and early investors from selling their shares for a fixed period after a stock sale, often after an initial public offering. It matters to investors because it temporarily limits the number of shares that can hit the market, which can keep the share price steadier; when the lock-up ends, a sudden increase in available shares can create extra volatility, revealing insiders’ confidence or lack thereof.
Omnibus Option Amendment Agreement financial
"entered into an Omnibus Option Amendment Agreement (the "Option Amendment Agreement") in respect of 104,644 non-qualified stock options"





74065P101

(CUSIP Number)
Alexandra A. Toohey, CFO
860 Washington Street, 3rd Floor,
New York, NY, 10014
212-339-5690

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
04/20/2026

(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).




schemaVersion:


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


Baker Bros. Advisors LP
Signature:/s/ Scott L. Lessing
Name/Title:By: Baker Bros. Advisors (GP) LLC, its general partner, Scott L. Lessing/ President
Date:04/22/2026
Baker Bros. Advisors (GP) LLC
Signature:/s/ Scott L. Lessing
Name/Title:Scott L. Lessing/ President
Date:04/22/2026
Julian C. Baker
Signature:/s/ Julian C. Baker
Name/Title:Julian C. Baker
Date:04/22/2026
Felix J. Baker
Signature:/s/ Felix J. Baker
Name/Title:Felix J. Baker
Date:04/22/2026

FAQ

How much of Prelude Therapeutics (PRLD) do Baker Bros. beneficially own?

Baker Bros. Advisors and related reporting persons beneficially own 10,295,301 Prelude Therapeutics common shares, representing about 15.5% of the class. This percentage is calculated using 66,243,507 shares outstanding as of April 21, 2026, plus certain director stock options described in the filing.

How did Baker Bros. participate in Prelude Therapeutics’ April 2026 offering?

Baker-affiliated funds 667 and Life Sciences purchased 114,601 and 2,137,651 prefunded warrants, totaling 2,252,252, in Prelude’s April 2026 offering. The offering also included 18,018,014 common shares at $4.44, while the prefunded warrants were sold at $4.4399 each, with a $0.0001 exercise price.

What are the ownership limits on Baker Bros.’ non-voting stock in Prelude Therapeutics (PRLD)?

Non-voting common stock held by Baker-affiliated funds is only convertible so the holders’ beneficial ownership does not exceed 9.99% of outstanding common stock. They may adjust this Beneficial Ownership Limitation up to 19.99% by written notice, which becomes effective 61 days after delivery.

What are the exercise limits on Baker Bros.’ prefunded warrants in Prelude Therapeutics?

The prefunded warrants are exercisable only to the extent Baker-affiliated holders, together with affiliates and group members, would not exceed 4.99% beneficial ownership of Prelude common stock. This Maximum Percentage can be changed up to 19.99% with written notice, effective after a 61-day waiting period.

What lock-up restrictions apply to the Baker-affiliated director at Prelude Therapeutics?

Dr. Paul Scherer, an employee of Baker Bros. Advisors and Prelude director, agreed to a lock-up from April 20, 2026, until June 19, 2026. During this period, subject to exceptions, he cannot transfer or hedge common stock or related securities without prior written consent from the underwriters’ representatives.

How are Julian C. Baker’s Prelude Therapeutics stock options structured?

Julian C. Baker holds 104,644 non-qualified stock options as past board compensation, all vesting within 60 days of the filing. These options are split across grants with exercise prices of $31.02, $4.74, $5.56, and $3.90, expiring between June 2031 and June 2034 under the company’s equity plan.