Celyad Oncology SA — Major Shareholding Notification 2021

May 5, 2021

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1) Status of the notification

Fina
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2) Issuer

	Name CELYAD ONCOLOGY
ldentification number 0891-118-115

3) Reason for the notification

Crossing of a threshold by persons acting in concert
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4) Notification by

Persons acting in concert

5) Persons subject to the notification requirement

Name	Address (for legal entities)
TOLEFI	1589D chaussée de waterloo 1180 Bruxelles - Be
Serge Goblet
Isabelle Thoumyre
Jerome Goblet
Jean Daniel Goblet

6) Persons that dispose of voting rights (only to be filled in if art 7 of the Law applies)

7) Date on which the threshold is crossed

03-05-2021 (DD/MM/YYYY) 8) Threshold that is crossed (in %) 25 If the holding has fallen below the lowest threshold, you have the option of not entering any numbers in Section 10

9) Denominator

17,373 181

Please enter the denominator before filling in the data

10) Notified details

A) Voting rights	Previous notification # of voting rights	After the transaction
Holders of voting rights		# of voting rights		% of voting rights
		Linked to securities	Not linked to the securities	Linked lo secunties	Not linked to the securities
TOLEFI	2 295 701	4_591_402		26 43%
Serge Goblet	56 003	56 180		0 32%
lsabelle Thoumyre	7_300	7.300		0.0436
Subtotal	2 359 004	4 654 882		26 79%

Jerome Goblet	250	250	0 00%
Jean-Daniel Goblet	384	384	000%
TOTAL		4-655-516	26,80%	0,00%

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Start with "groups" of helders and subtolitics with the with the parsons who are "alone".
For groups start with the ultimate controlliages we have sites and type sites on cCA

B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
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	TOTAL			0	0,00%

The totals will be updated once you have clicked on

TOTAL (A & B)			# of voting rights % of voting rights
	CALCULATE	4.855.518	20.80%

11) Full chain of controlled undertakings through which the holding is effectively held, if applicable

La société TOLEFI est détenue à 100% par Monsieur Goblet, madame Thpoumyre et ses enfants
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12) In case of proxy voting for only one GM
(DD/MM/YYYY) will cease to hold / Holder O voting rights as of will hold again
13) Additional information
Done at Uccle On 04-05-2021 (DD/MM/YYYY)
Name & capacity Serge GOBLET Administrateur délégué Serge GOBLET Signature TOLEFI SA 1589 D. ch. de Waterloo 1180 Bruxelles - Be Tel: 02/375 16 80 - Fax: 02/375 07

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