Sec Form 3 Filing - Speidel Thomas @ Ads-Tec Energy Public Ltd Co - 2026-03-18

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Speidel Thomas 2. Issuer Name and Ticker or Trading Symbol Ads-Tec Energy Public Ltd Co [ ADSE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O ADS-TEC ENERGY PUBLIC LTD CO, 10 EARLSFORT TERRACE 3. Date of Earliest Transaction (MM/DD/YY) 03/18/2026 (Street) DUBLIN 2T380 D02 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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) Code V Amount (A) or (D) Price Ordinary Shares, $0.0001 nominal value per share 254,439 ( 1 ) D Ordinary Shares, $0.0001 nominal value per share 18,020,882 I Via ads-tec Energy GmbH. See Footnote ( 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Non-Qualified Stock Options $ 8.62 03/31/2026 03/31/2032 Ordinary Shares 355,000 ( 3 ) D Non-Qualified Stock Options $ 6 07/05/2027 07/05/2033 Ordinary Shares 406,250 ( 4 ) D Non-Qualified Stock Options $ 10.44 04/15/2028 04/15/2034 Ordinary Shares 153,100 ( 5 ) D Non-Qualified Stock Options $ 13.45 05/01/2029 05/01/2035 Ordinary Shares 120,818 ( 6 ) D Warrants $ 6.2 08/26/2025 08/26/2026 Ordinary Shares 800,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Speidel Thomas C/O ADS-TEC ENERGY PUBLIC LTD CO 10 EARLSFORT TERRACE DUBLIN 2T380 D02 X X Chief Executive Officer Signatures /s/ Thomas Speidel 03/26/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Granted pursuant to the issuer's 2021 Omnibus Incentive Plan. Each restricted stock unit ("RSU") represents a contingent right to receive one ordinary share of the issuer, nominal value $0.0001 per share ("Ordinary Share"). Of the RSUs reported, (i) 127,170 are fully vested, (ii) 54,167 were granted on 7/5/23 and will vest in four equal installments commencing the first anniversary of the grant date, (iii) 31,130 were granted on 4/15/24, and will vest in four equal installments commencing the first anniversary of the grant date, (iv) 9,217 were granted on 9/23/24 and will vest in full upon the one-year anniversary of the grant date, (v) 24,164 were granted 5/1/25, and will vest in four equal installments commencing the first anniversary of the grant date, and (vi) 8,591 were granted on 9/26/25, and will vest in full upon the one-year anniversary of the grant date. ( 2 )Mr. Speidel is the chief executive officer of ads-tec Energy GmbH and may be deemed to beneficially own the securities held by ads-tec Energy GmbH. Mr. Speidel disclaims beneficial ownership of any securities held by ads-tec Energy GmbH other than to the extent of his pecuniary interests therein, directly or indirectly. ( 3 )Granted pursuant to the issuer's 2021 Omnibus Incentive Plan. 355,000 non-qualified stock options ("NQOs") were granted on March 31, 2022. The reported number of NQOs represent (i) 266,250 vested and unexercised NQOs and (ii) 88,750 outstanding NQOs which will vest in full on the fourth anniversary of the grant date. ( 4 )Granted pursuant to the issuer's 2021 Omnibus Incentive Plan. 406,250 NQOs were granted on July 5, 2023. The reported number of NQOs represent (i) 203,124 vested and unexercised NQOs and (ii) 203,126 unvested NQOs that will vest in two equal installments commencing the third and fourth anniversary of the grant date. ( 5 )Granted pursuant to the issuer's 2021 Omnibus Incentive Plan. 153,100 NQOs were granted on April 15, 2024. The reported number of NQOs represent (i) 38,275 vested and unexercised NQOs and (ii) 114,825 unvested NQOs which will vest in three equal installments commencing the second, third, and fourth anniversary of the grant date. ( 6 )Granted pursuant to the issuer's 2021 Omnibus Incentive Plan. 120,818 NQOs were granted on May 1, 2025 and will vest in four equal installments commencing the first anniversary of the grant date.

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