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Apellis Pharmaceuticals (APLS) CFO equity awards converted in Biogen cash-and-CVR merger

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Apellis Pharmaceuticals’ Chief Financial Officer Timothy Sullivan reported multiple equity award changes tied to the company’s acquisition by Biogen. Common shares tendered before the offer’s expiration were exchanged for $41.00 in cash per share plus one contractual contingent value right (CVR) per share.

Each CVR can pay up to an aggregate $4.00 in cash if specified milestones are achieved. After completion of the tender offer, Biogen’s subsidiary merged into Apellis, making Apellis a wholly owned subsidiary. Outstanding common stock was automatically converted into the right to receive the cash-and-CVR offer price.

Restricted stock units were cancelled and converted into cash-and-CVR rights that continue to vest over time, with performance conditions removed. Vested and certain unvested stock options were cancelled and converted into cash and/or CVRs depending on exercise price, while options with exercise prices at or above $45.00 were cancelled without consideration.

Positive

  • None.

Negative

  • None.
Insider Sullivan Timothy Eugene
Role Chief Financial Officer
Type Security Shares Price Value
Disposition Stock Option (right to buy) 232,903 $0.00 --
Disposition Stock Option (right to buy) 84,946 $0.00 --
Disposition Stock Option (right to buy) 23,958 $0.00 --
Disposition Stock Option (right to buy) 82,500 $0.00 --
Disposition Stock Option (right to buy) 60,242 $0.00 --
Disposition Stock Option (right to buy) 70,125 $0.00 --
Disposition Stock Option (right to buy) 45,000 $0.00 --
Disposition Stock Option (right to buy) 43,183 $0.00 --
Disposition Stock Option (right to buy) 34,533 $0.00 --
U Common Stock 140,945 $0.00 --
U Common Stock 71,492 $0.00 --
Grant/Award Common Stock 41,250 $0.00 --
Disposition Common Stock 41,250 $0.00 --
Grant/Award Common Stock 30,620 $0.00 --
Disposition Common Stock 30,620 $0.00 --
Grant/Award Common Stock 29,070 $0.00 --
Disposition Common Stock 29,070 $0.00 --
Grant/Award Common Stock 58,140 $0.00 --
Disposition Common Stock 58,140 $0.00 --
Disposition Common Stock 6,872 $0.00 --
Disposition Common Stock 11,874 $0.00 --
Disposition Common Stock 34,447 $0.00 --
Disposition Common Stock 58,140 $0.00 --
Holdings After Transaction: Stock Option (right to buy) — 0 shares (Direct, null); Common Stock — 0 shares (Direct, null); Common Stock — 0 shares (Indirect, Indirect Owner (The Timothy E Sullivan Irrevocable Trust of 2023))
Footnotes (1)
  1. Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), by and among Apellis Pharmaceuticals, Inc. (the "Issuer"), Biogen Inc. ("Parent") and Parent's direct wholly-owned subsidiary, Aspen Purchaser Sub, Inc. ("Purchaser"), dated as of March 31, 2026, the shares of common stock, par value $0.0001 per share, of the Issuer (the "Common Stock") that were tendered to Purchaser prior to the expiration time of the tender offer were exchanged for: (i) $41.00 per share of Common Stock, net to the seller in cash, without interest and subject to reduction for any applicable tax withholding (the "Cash Amount"), plus (ii) one contractual, non-transferable contingent value right per share of Common Stock (each, a "CVR"), (continued from footnote 1) which entitles the holder to receive potential payments of up to an aggregate of $4.00 in cash, without interest and subject to reduction for any applicable tax withholding, upon the achievement of certain specified milestones in accordance with the terms and conditions of a contingent value rights agreement (the "CVR Agreement" and the Cash Amount plus one CVR, together, the "Offer Price"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Purchaser merged with and into the Issuer (the "Merger"), effective as of the filing and acceptance of the certificate of merger relating thereto on May 14, 2026 (the "Effective Time"), with the Issuer continuing as the surviving corporation (the "Surviving Corporation") and a wholly owned subsidiary of Parent. In the Merger, each share of Common Stock issued and outstanding immediately prior to the Effective Time, subject to certain exceptions, (continued from footnote 2) was automatically converted into the right to receive the Offer Price from Purchaser, without interest and subject to reduction for any applicable withholding taxes. Patrick O. Collins is the trustee of The Timothy E Sullivan Irrevocable Trust of 2023. The reporting person disclaims beneficial ownership over the shares held by The Timothy E Sullivan Irrevocable Trust of 2023 except to the extent of his pecuniary interest therein. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each outstanding RSU that was not a Cash-Out RSU Award (each, a "Converted RSU Award") that was subject to both a time-based and a performance-based vesting schedule (other than RSUs granted in January 2026 and for which performance-based vesting schedule was based on total shareholder return), was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award, as determined based on the target level of performance, multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award. (continued from footnote 4) Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time, as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement, provided that such payments will no longer be subject to performance-based vesting. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Converted RSU Award that was granted in January 2026 subject to both a time-based and a performance-based vesting schedule, with the performance-based vesting schedule based on performance with respect to total shareholder return ("TSR") relative to the TSR of the group of companies in the Nasdaq Biotechnology Index ("Relative TSR"), was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award, as determined based on the actual performance determined by the compensation committee of the Issuer's board of directors as of May 8, 2026 (which is the latest practicable date prior to the Effective Time), (continued from footnote 6) multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award. On May 11, 2026, the compensation committee certified that the Relative TSR as of May 8, 2026 was at the 93.3rd percentile, which resulted in a payout percentage of 200% of target for each such Converted RSU Award, as reported in the table above. Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time, (continued from footnote 7) as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement, provided that such payments will no longer be subject to performance-based vesting. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Converted RSU Award that was subject solely to a time-based vesting schedule (including, for the avoidance of doubt, any Converted RSU Award for which the performance period of any applicable performance metric had already ended) was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award. (continued from footnote 8) Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time, as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each outstanding and unexercised option to purchase shares of Common Stock that was vested pursuant to its existing terms or that vested as a result of the transactions contemplated by the Merger Agreement (each, a "Cash-Out Option") and had an exercise price per share that was less than $41.00 (the Cash Amount) was automatically cancelled and converted into the right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such option, multiplied by (y) the excess of the Cash Amount over the exercise price per share of such option and (ii) one CVR for each share of Common Stock underlying such option. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Cash-Out Option that had an exercise price per share that was equal to or greater than the Cash Amount, and less than the sum of (i) $41.00 (the Cash Amount) plus (ii) $4.00 (i.e., the maximum amount payable pursuant to a CVR assuming that the milestones are achieved) (such sum of $45.00, the "Aggregate Amount"), was automatically cancelled and converted into the right to receive one CVR for each share of Common Stock underlying such Cash-Out Option (with any payable milestone payment amounts being reduced by the excess, if any, of the applicable exercise price per share over the Cash Amount). Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each vested or unvested option with an exercise price per share that was equal to or greater than $45.00 (the Aggregate Amount) was cancelled without consideration and will have no further force or effect.
Cash Amount per share $41.00 per share Cash consideration for each Apellis common share in tender offer
Maximum CVR payout $4.00 aggregate Potential additional cash per share from contingent value rights
Aggregate Amount threshold $45.00 per share Sum of $41.00 cash plus $4.00 maximum CVR payments
TSR performance percentile 93.3rd percentile Relative TSR used to determine payout for January 2026 Converted RSU Awards
TSR RSU payout multiple 200% of target Payout percentage for certain performance-based RSUs as of May 8, 2026
Tendered trust shares 71,492 shares Common stock disposed of via tender offer by The Timothy E Sullivan Irrevocable Trust of 2023
Tendered direct shares 140,945 shares Common stock disposed of directly via tender offer by the reporting person
Cancelled Cash-Out Option block 232,903 options at $10.03 Stock options disposed of to issuer with $10.03 exercise price per share
contingent value right financial
"one contractual, non-transferable contingent value right per share of Common Stock"
A contingent value right is a special security that gives its holder the right to receive one or more future payments only if specified events happen, such as a product reaching a sales target or getting regulatory approval. It matters to investors because it offers potential extra payout tied to uncertain outcomes—like a bet that a project will succeed—so it can add upside to a deal while also carrying extra risk and valuation uncertainty.
Converted RSU Award financial
"each outstanding RSU that was not a Cash-Out RSU Award (each, a "Converted RSU Award")"
Relative TSR financial
"performance-based vesting schedule based on performance with respect to total shareholder return ("TSR") relative to the TSR of the group of companies in the Nasdaq Biotechnology Index ("Relative TSR")"
Cash-Out Option financial
"each outstanding and unexercised option to purchase shares of Common Stock that was vested ... (each, a "Cash-Out Option")"
Aggregate Amount financial
"such sum of $45.00, the "Aggregate Amount""
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
X
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*
Sullivan Timothy Eugene

(Last)(First)(Middle)
C/O APELLIS PHARMACEUTICALS, INC.
100 FIFTH AVENUE, 3RD FLOOR

(Street)
WALTHAM MASSACHUSETTS 02451

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Apellis Pharmaceuticals, Inc. [ APLS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/14/2026U(1)(2)(3)140,945D(1)(2)(3)0D
Common Stock05/14/2026U(1)(2)(3)71,492D(1)(2)(3)0IIndirect Owner (The Timothy E Sullivan Irrevocable Trust of 2023)(4)
Common Stock05/14/2026A41,250A(5)(6)41,250D
Common Stock05/14/2026D41,250D(5)(6)0D
Common Stock05/14/2026A30,620A(5)(6)30,620D
Common Stock05/14/2026D30,620D(5)(6)0D
Common Stock05/14/2026A29,070A(5)(6)29,070D
Common Stock05/14/2026D29,070D(5)(6)0D
Common Stock05/14/2026A58,140A(7)(8)(9)58,140D
Common Stock05/14/2026D58,140D(7)(8)(9)0D
Common Stock05/14/2026D6,872D(10)(11)0(10)(11)D
Common Stock05/14/2026D11,874D(10)(11)0(10)(11)D
Common Stock05/14/2026D34,447D(10)(11)0(10)(11)D
Common Stock05/14/2026D58,140D(10)(11)0(10)(11)D
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
Stock Option (right to buy)$10.0305/14/2026D232,903 (12) (12)Common Stock232,903(12)0D
Stock Option (right to buy)$13.8505/14/2026D84,946 (12) (12)Common Stock84,946(12)0D
Stock Option (right to buy)$14.9505/14/2026D23,958 (12) (12)Common Stock23,958(12)0D
Stock Option (right to buy)$19.3905/14/2026D82,500 (12) (12)Common Stock82,500(12)0D
Stock Option (right to buy)$35.4605/14/2026D60,242 (12) (12)Common Stock60,242(12)0D
Stock Option (right to buy)$44.3305/14/2026D70,125 (13) (13)Common Stock70,125(13)0D
Stock Option (right to buy)$44.905/14/2026D45,000 (13) (13)Common Stock45,000(13)0D
Stock Option (right to buy)$52.6605/14/2026D43,183 (14) (14)Common Stock43,183(14)0D
Stock Option (right to buy)$66.305/14/2026D34,533 (14) (14)Common Stock34,533(14)0D
Explanation of Responses:
1. Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), by and among Apellis Pharmaceuticals, Inc. (the "Issuer"), Biogen Inc. ("Parent") and Parent's direct wholly-owned subsidiary, Aspen Purchaser Sub, Inc. ("Purchaser"), dated as of March 31, 2026, the shares of common stock, par value $0.0001 per share, of the Issuer (the "Common Stock") that were tendered to Purchaser prior to the expiration time of the tender offer were exchanged for: (i) $41.00 per share of Common Stock, net to the seller in cash, without interest and subject to reduction for any applicable tax withholding (the "Cash Amount"), plus (ii) one contractual, non-transferable contingent value right per share of Common Stock (each, a "CVR"),
2. (continued from footnote 1) which entitles the holder to receive potential payments of up to an aggregate of $4.00 in cash, without interest and subject to reduction for any applicable tax withholding, upon the achievement of certain specified milestones in accordance with the terms and conditions of a contingent value rights agreement (the "CVR Agreement" and the Cash Amount plus one CVR, together, the "Offer Price"). After completion of the tender offer, pursuant to the terms of the Merger Agreement, Purchaser merged with and into the Issuer (the "Merger"), effective as of the filing and acceptance of the certificate of merger relating thereto on May 14, 2026 (the "Effective Time"), with the Issuer continuing as the surviving corporation (the "Surviving Corporation") and a wholly owned subsidiary of Parent. In the Merger, each share of Common Stock issued and outstanding immediately prior to the Effective Time, subject to certain exceptions,
3. (continued from footnote 2) was automatically converted into the right to receive the Offer Price from Purchaser, without interest and subject to reduction for any applicable withholding taxes.
4. Patrick O. Collins is the trustee of The Timothy E Sullivan Irrevocable Trust of 2023. The reporting person disclaims beneficial ownership over the shares held by The Timothy E Sullivan Irrevocable Trust of 2023 except to the extent of his pecuniary interest therein.
5. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each outstanding RSU that was not a Cash-Out RSU Award (each, a "Converted RSU Award") that was subject to both a time-based and a performance-based vesting schedule (other than RSUs granted in January 2026 and for which performance-based vesting schedule was based on total shareholder return), was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award, as determined based on the target level of performance, multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award.
6. (continued from footnote 4) Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time, as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement, provided that such payments will no longer be subject to performance-based vesting.
7. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Converted RSU Award that was granted in January 2026 subject to both a time-based and a performance-based vesting schedule, with the performance-based vesting schedule based on performance with respect to total shareholder return ("TSR") relative to the TSR of the group of companies in the Nasdaq Biotechnology Index ("Relative TSR"), was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award, as determined based on the actual performance determined by the compensation committee of the Issuer's board of directors as of May 8, 2026 (which is the latest practicable date prior to the Effective Time),
8. (continued from footnote 6) multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award. On May 11, 2026, the compensation committee certified that the Relative TSR as of May 8, 2026 was at the 93.3rd percentile, which resulted in a payout percentage of 200% of target for each such Converted RSU Award, as reported in the table above. Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time,
9. (continued from footnote 7) as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement, provided that such payments will no longer be subject to performance-based vesting.
10. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Converted RSU Award that was subject solely to a time-based vesting schedule (including, for the avoidance of doubt, any Converted RSU Award for which the performance period of any applicable performance metric had already ended) was automatically cancelled and converted into the contingent right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such Converted RSU Award multiplied by (y) the Cash Amount and (ii) one CVR for each share of Common Stock underlying such Converted RSU Award.
11. (continued from footnote 8) Subject to the holder's continued service through the vesting dates applicable to the Converted RSU Award under its terms as in effect immediately prior to the Effective Time, all payments in respect of such Converted RSU Award pursuant to the Merger Agreement will vest and become payable at the same time as the underlying Converted RSU Award would have vested and become settled pursuant to its terms and shall otherwise remain subject to the same terms and conditions (including any "double-trigger" vesting provisions applicable to the Converted RSU Award immediately prior to the Effective Time, as extended as provided by the Merger Agreement) as were applicable to the underlying RSU immediately prior to the Effective Time and the terms of the CVR Agreement.
12. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each outstanding and unexercised option to purchase shares of Common Stock that was vested pursuant to its existing terms or that vested as a result of the transactions contemplated by the Merger Agreement (each, a "Cash-Out Option") and had an exercise price per share that was less than $41.00 (the Cash Amount) was automatically cancelled and converted into the right to receive (i) an amount of cash, without interest and less applicable tax withholding, equal to the product of (x) the total number of shares of Common Stock underlying such option, multiplied by (y) the excess of the Cash Amount over the exercise price per share of such option and (ii) one CVR for each share of Common Stock underlying such option.
13. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Cash-Out Option that had an exercise price per share that was equal to or greater than the Cash Amount, and less than the sum of (i) $41.00 (the Cash Amount) plus (ii) $4.00 (i.e., the maximum amount payable pursuant to a CVR assuming that the milestones are achieved) (such sum of $45.00, the "Aggregate Amount"), was automatically cancelled and converted into the right to receive one CVR for each share of Common Stock underlying such Cash-Out Option (with any payable milestone payment amounts being reduced by the excess, if any, of the applicable exercise price per share over the Cash Amount).
14. Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each vested or unvested option with an exercise price per share that was equal to or greater than $45.00 (the Aggregate Amount) was cancelled without consideration and will have no further force or effect.
/s/ David Watson, attorney-in-fact for Timothy Sullivan05/14/2026
** 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 does the Apellis (APLS) Form 4 filing for Timothy Sullivan show?

The Form 4 shows equity award changes for CFO Timothy Sullivan in connection with Biogen’s acquisition of Apellis. His common shares, RSUs, and stock options were cancelled or converted into rights to receive cash and contingent value rights under the merger terms.

What is the cash and CVR offer price in the Apellis–Biogen deal?

Under the merger, each Apellis share is exchanged for $41.00 in cash plus one CVR. Each CVR can pay up to an aggregate $4.00 in cash if defined milestones are met, making the potential total value per share $45.00.

How were Apellis CFO Timothy Sullivan’s RSUs treated in the merger?

His RSUs were cancelled and converted into cash-and-CVR rights. Payments equal the cash amount times underlying shares plus one CVR per share, and continue to vest on the original schedules, with performance-based vesting conditions removed but time-based vesting still required.

What happened to Apellis stock options in the Biogen transaction?

Vested and certain unvested options with exercise prices below $41.00 were cancelled and converted into cash plus CVRs. Options with exercise prices between $41.00 and $45.00 received CVRs only, while options at or above $45.00 were cancelled without consideration.

How were TSR-based RSUs for Apellis’ executives treated at closing?

TSR-based RSUs granted in January 2026 were settled based on actual performance. Relative total shareholder return was certified at the 93.3rd percentile, resulting in a 200% of target payout for those awards, delivered as cash-and-CVR rights that continue to vest over time.

What happened to Apellis shares held by The Timothy E Sullivan Irrevocable Trust?

Shares held by The Timothy E Sullivan Irrevocable Trust of 2023 were disposed of pursuant to the tender offer. A trustee controls the trust, and the reporting person disclaims beneficial ownership except to the extent of any pecuniary interest in those shares.