SC 13G/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 1)*

DBV Technologies S.A.

(Name of Issuer)

Ordinary Shares, nominal value €0.10 per share

(Title of Class of Securities)

23306J101 (American Depositary Shares, each representing one-half of one Ordinary Share)

(CUSIP Number)

December 31, 2017

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o Rule 13d-1(b)

o Rule 13d-1(c)

x Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in 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).

CUSIP No. 23306J101
	1	Name of Reporting Person Bpifrance Participations S.A.
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power Not applicable.
			6		Shared Voting Power 1,585,260
			7		Sole Dispositive Power Not applicable.
			8		Shared Dispositive Power 1,585,260
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 1,585,260
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 6.3%
	12	Type of Reporting Person (See Instructions) OO

2

CUSIP No. 23306J101
	1	Name of Reporting Person Innobio FPCI
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power Not applicable.
			6		Shared Voting Power 226,133
			7		Sole Dispositive Power Not applicable.
			8		Shared Dispositive Power 226,133
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 226,133
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 0.9%
	12	Type of Reporting Person (See Instructions) OO

3

CUSIP No. 23306J101
	1	Name of Reporting Person Bpifrance Investissement S.A.S.
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power Not applicable.
			6		Shared Voting Power 226,133
			7		Sole Dispositive Power Not applicable.
			8		Shared Dispositive Power 226,133
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 226,133
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 0.9%
	12	Type of Reporting Person (See Instructions) OO

4

CUSIP No. 23306J101
	1	Name of Reporting Person Caisse des Dépôts
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power 90,000
			6		Shared Voting Power 1,811,393
			7		Sole Dispositive Power 90,000
			8		Shared Dispositive Power 1,811,393
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 1,901,393
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 7.6%
	12	Type of Reporting Person (See Instructions) OO

5

CUSIP No. 23306J101
	1	Name of Reporting Person EPIC Bpifrance
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power Not applicable.
			6		Shared Voting Power 1,811,393
			7		Sole Dispositive Power Not applicable.
			8		Shared Dispositive Power 1,811,393
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 1,811,393
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 7.2%
	12	Type of Reporting Person (See Instructions) OO

6

CUSIP No. 23306J101
	1	Name of Reporting Person Bpifrance S.A.
	2	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3	SEC Use Only
	4	Citizenship or Place of Organization France
Number of Shares Beneficially Owned by Each Reporting Person With			5		Sole Voting Power Not applicable.
			6		Shared Voting Power 1,811,393
			7		Sole Dispositive Power Not applicable.
			8		Shared Dispositive Power 1,811,393
	9	Aggregate Amount Beneficially Owned by Each Reporting Person 1,811,393
	10	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11	Percent of Class Represented by Amount in Row (9) 7.2%
	12	Type of Reporting Person (See Instructions) OO

7

Item 1 (a)		Name of Issuer DBV Technologies S.A.
Item 1 (b)		Address of Issuer’s Principal Executive Offices: 177-181 avenue Pierre Brossolette 92120 Montrouge FRANCE
Item 2 (a)		Name of Person Filing: (i) Bpifrance Participations S.A. (ii) Innobio FPCI (“Innobio”) (iii) Bpifrance Investissement S.A.S. (iv) Caisse des Dépôts (“CDC”) (v) EPIC Bpifrance (“EPIC”) (vi) Bpifrance S.A.
Item 2 (b)		Address of Principal Business Office: (i) 27-31, avenue du Général Leclerc 94710 Maisons-Alfort Cedex France (ii) 27-31, avenue du Général Leclerc 94710 Maisons-Alfort Cedex France (iii) 27-31, avenue du Général Leclerc 94710 Maisons-Alfort Cedex France (iv) 56, rue de Lille 75007 Paris France (v) 27-31, avenue du Général Leclerc 94710 Maisons-Alfort Cedex France (vi) 27-31, avenue du Général Leclerc 94710 Maisons-Alfort Cedex France
Item 2 (c)		Citizenship: France
Item 2 (d)		Title of Class of Securities: Ordinary Shares, nominal value €0.10 per share (“Ordinary Shares”)
Item 2 (e)		CUSIP Number: 23306J101 (American Depositary Shares, each representing one-half of one Ordinary Share)
Item 3	If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
		Not applicable.

8

Item 4	Ownership:
	Please see Items 5, 6, 7, 8, 9 and 11 of each cover sheet for each filing entity. Bpifrance Participations S.A. is a French public investment fund specializing in the business of equity financing via direct investment or fund of funds. Bpifrance Participations S.A. is a wholly-owned subsidiary of Bpifrance S.A., a French financial institution especially created for this purpose. CDC, a French special public entity (établissement special) and EPIC, a French public institution of industrial and commercial nature, each hold 50% of the share capital of Bpifrance S.A. and jointly control Bpifrance S.A. CDC is principally engaged in the business of long-term investments. EPIC is principally engaged in the business of banking finance. Innobio is a fund managed by Bpifrance Investissement S.A.S., a French management company (société de gestion), and Bpifrance Investissement S.A.S., is a wholly-owned subsidiary of Bpifrance Participations S.A. InnoBio is a venture capital fund. The main aim of the fund is to make equity investments in innovative companies providing technology, products and services for health care. As of December 31, 2017, Bpifrance Participations S.A. held directly 1,585,260 Ordinary Shares, and Innobio held directly 226,133 Ordinary Shares. Neither Bpifrance S.A., EPIC nor Bpifrance Investissement S.A.S. held any Ordinary Shares directly. Bpifrance Investissement S.A.S. may be deemed to be the beneficial owner of the 226,133 Ordinary Shares held by Innobio, through its management of Innobio. Bpifrance S.A. may be deemed to be the beneficial owner of 1,811,393 Ordinary Shares, indirectly through its sole ownership of Bpifrance Participations S.A., which is the parent company of Bpifrance Investissement S.A.S. EPIC may be deemed to be the beneficial owner of 1,811,393 Ordinary Shares, indirectly through its joint ownership and control of Bpifrance S.A. As of December 31, 2017, CDC held directly 90,000 Ordinary Shares and, as a result, CDC may be deemed to be the beneficial owner of 1,901,393 Ordinary Shares directly and indirectly through its joint ownership and control of Bpifrance S.A.
Item 5	Ownership of 5 Percent or Less of a Class:
	Not applicable.
Item 6	Ownership of More than 5 Percent on Behalf of Another Person:
	Not applicable.
Item 7	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person:
	Not applicable.
Item 8	Identification and Classification of Members of the Group:
	Not applicable.
Item 9	Notice of Dissolution of Group:
	Not applicable.

9

Item 10	Certifications:
	Not applicable.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: February 12, 2018	Bpifrance Participations S.A.
	By:	/s/ Sophie Paquin*
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs
Dated: February 12, 2018	Innobio FPCI
	By:	/s/ Sophie Paquin**
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs (Bpifrance Investissement)
Dated: February 12, 2018	Bpifrance Investissement S.A.S.
	By:	/s/ Sophie Paquin**
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs
Dated: February 12, 2018	Caisse des Dépôts
	By:	/s/ Joel Prohin***
	Name:	Joel Prohin
	Title:	Head of Portfolio Management

10

Dated: February 12, 2018	Epic Bpifrance
	By:	/s/ Sophie Paquin****
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs
Dated: February 12, 2018	Bpifrance S.A.
	By:	/s/ Boubakar Dione*****
	Name:	Boubakar Dione
	Title:	Group Director of Legal Affairs

* Sophie Paquin is signing on behalf of Bpifrance Participations S.A. by power of attorney previously filed with the Securities and Exchange Commission on February 8, 2018 as Exhibit 1 to Schedule 13D/A filed by Bpifrance Participations related to CGG, and hereby incorporated herein by reference.

** Sophie Paquin is signing on behalf of Bpifrance Investissement S.A.S. by power of attorney filed as Exhibit 2 hereto, incorporated herein by reference.

*** Joel Prohin is signing on behalf of Caisse des Dépôts by executive order from the general manager of Caisse des Dépôts previously filed with the Securities and Exchange Commission on September 7, 2017 as Exhibit 1 to Schedule 13D/A filed by Bpifrance Participations related to Constellium N.V., and hereby incorporated herein by reference.

**** Sophie Paquin is signing on behalf of EPIC Bpifrance by power of attorney previously filed with the Securities and Exchange Commission on February 14, 2017 as Exhibit 3 to Schedule 13G/A filed by Bpifrance Participations related to Orange S.A., and hereby incorporated herein by reference.

***** Boubakar Dione is signing on behalf of Bpifrance S.A. by power of attorney previously filed with the Securities and Exchange Commission on September 7, 2017 as Exhibit 2 to Schedule 13D/A filed by Bpifrance Participations related to Constellium N.V., and hereby incorporated herein by reference.

11

EX-99.1

Exhibit 99.1

Exhibit 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) of the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the ordinary shares of DBV Technologies S.A. and further agree that this Joint Filing Agreement shall be included as an Exhibit to such joint filing. In evidence thereof, the undersigned, being duly authorized, hereby execute this Joint Filing Agreement as of February 12, 2018.

Dated: February 12, 2018	Bpifrance Participations S.A.
	By:	/s/ Sophie Paquin
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs
Dated: February 12, 2018	Innobio FPCI
	By:	/s/ Sophie Paquin
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs (Bpifrance Investissement)
Dated: February 12, 2018	Bpifrance Investissement S.A.S.
	By:	/s/ Sophie Paquin
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs
Dated: February 12, 2018	Caisse des Dépôts
	By:	/s/ Joel Prohin
	Name:	Joel Prohin
	Title:	Head of Portfolio Management
Dated: February 12, 2018	Epic Bpifrance
	By:	/s/ Sophie Paquin
	Name:	Sophie Paquin
	Title:	Director of Legal Affairs

Dated: February 12, 2018	Bpifrance S.A.
	By:	/s/ Boubakar Dione
	Name:	Boubakar Dione
	Title:	Group Director of Legal Affairs

EX-99.2

Exhibit 99.2

Exhibit 2

FREE TRANSLATION OF
POWER OF ATTORNEY

I, the undersigned,

Mr. Boubakar Dione (the “Delegator”), acting pursuant to a power of attorney granted on July 28, 2014 by Mr. Nicolas Dufourcq, chief executive officer of the company Bpifrance Investissement, a French simplified joint stock company with share capital of 20,000,000 euros, headquartered at 27-31 avenue du Général Leclerc in Maisons-Alfort (94710), registered with the Trade and Companies register of Créteil under number 433 975 224 (the “Company”),

delegate to Mrs. Sophie Paquin, Director of Legal Affairs (the “Delegate”), on a permanent basis with possibility to sub delegate, the  powers specified below in matters of (1) representation, in particular in front of jurisdictions, and (2) of choice of legal advisers:

1.Delegation of powers in matters of representation, in particular in front of jurisdictions

-(…)

-sign any declaration of the crossing of threshold;

-(…)

2.Delegation of powers in matters of choice of legal advisers

-(…)

The Delegate shall have total autonomy in the implementation of this delegation of powers and shall act in the interest of the Company and agrees to respect the applicable regulations, the provisions of the by-laws and to comply with any existing internal procedures, in particular in terms of control of engagements and expenses. In this respect, the Delegate certifies to have taken full knowledge of the by-laws of the Company and the internal regulation of the Board of the Company.

This power of attorney has been established for an indefinite period. It cancels and replaces any prior delegation on the same subject matters.

It may be modified at any time by the Delegator and it may be revoked at any time at the initiative of the Delegator or the Delegate. In any event, this power of attorney will end if the functions of the Delegate are terminated.

Signed at Maisons-Alfort, on October 15, 2014, in two (2) original copies,

Good for power of attorney,	Good for acceptance of power of attorney,
/s/ Boubakar Dione	/s/ Sophie Paquin
The Delegator(1)	The Delegate(2)
Mr. Boubakar DIONE	Mrs. Sophie PAQUIN

(1)Signature preceded by “Good for power of attorney”

(2)Signature preceded by “Good for acceptance of power of attorney”