Other Information
−Removed: On May 21, 2025 , Mr.
+Added: On November 12, 2025 , Mr.
Seth Bernstein , Chief Executive Officer of AB adopted a Rule 10b5-1 trading arrangement, as defined in Regulation S-K, (the " Plan"), Item 408.
−Removed: The Rule 10b5-1 trading arrangement had a plan effective date of August 19, 2025 and plan end date of November 17, 2025 and provided for the sale of up to 31,694 AB Holding Units pursuant to the terms of the plan.
−Removed: During the third quarter, a total of 31,694 AB units were sold pursuant to the Plan and the Plan was terminated.
−Removed: No other directors or officers adopted or terminated a 10b5-1 trading arrangement or non-10b5-1 trading arrangement during the third quarter of 2025.
+Added: The Rule 10b5-1 trading arrangement allowed trading to commence upon conclusion of the requisite cooling-off period and had a plan end date October 27, 2026 and provided for the sale of up to 26,840 AB Holding Units pursuant to the terms of the plan.
+Added: During the first quarter of 2026, a total of 26,840 AB Units were sold pursuant to the Plan and the Plan was terminated.
+Added: No other directors or officers adopted or terminated a 10b5-1 trading arrangement or non-10b5-1 trading arrangement during the first quarter of 2026.
31.1 Certification of Mr.
9 unchanged sentences
99.1 Part I, Items 1 through 4 of the AllianceBernstein L.P.
−Removed: Quarterly Report on Form 10-Q for the quarter ended September 30, 2025.
+Added: Quarterly Report on Form 10-Q for the quarter ended March 31, 202 6 .
101.INS XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
4 unchanged sentences
101.DEF XBRL Taxonomy Extension Definition Linkbase.
−Removed: 104 The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, formatted in Inline XBRL (included in Exhibit 101).
+Added: 104 The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in Inline XBRL (included in Exhibit 101).
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
−Removed: October 23, 2025 ALLIANCEBERNSTEIN HOLDING L.P.
+Added: May 1, 2026 ALLIANCEBERNSTEIN HOLDING L.P.
/s/ Thomas Simeone
5 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.