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Member

Bartłomiej SIENKIEWICZ

EPP · Poland

Group
EPP PPE
Country
Poland
Roll-call participation
97.3 %ⓘ of 620 roll calls in office · chamber median 90.6 % · whole term, final votes
With majority line
94.2 %ⓘ of 603 votes where the group had a line · EPP median 95.6 %
More facts (5)
National party
KO Koalicja Obywatelska
In office
Since 16 Jul 2024
Against clear line
20 of 561 votesⓘ
Committees
AFCO, LIBE (substitute)
Member id
86057
More

Record

The member’s figures against the median of their group and of the chamber. Each vote counts the member in the group they belonged to that day.

Roll-call participation ⓘ

97.3 %

603 of 620 final votes while in office

EPP median: 90.6 % (+6.7 pts)

Chamber median: 90.6 %

With majority line ⓘ

94.2 %

568 of 603 votes where their group had a line

EPP median: 95.6 % (−1.4 pts)

Against clear line ⓘ

3.6 %

20 of 561 votes where their group had a clear line

13 opposite (for ↔ against), 7 abstained against the line

Abstention ⓘ

2.5 %

15 of 603 votes cast

Participation 97.3 % — EPP median 90.6 %, 192 members.ⓘ
Data as a table
Participation among the 192 members of the EPP with enough votes.
FigureParticipation
Bartłomiej SIENKIEWICZ97.3 %
EPP median90.6 %
Lowest in the group18.4 %
Highest in the group99.8 %
Members192
With majority line 94.2 % — EPP median 95.6 %, 192 members.ⓘ
Data as a table
With majority line among the 192 members of the EPP with enough votes.
FigureWith majority line
Bartłomiej SIENKIEWICZ94.2 %
EPP median95.6 %
Lowest in the group67.8 %
Highest in the group99.0 %
Members192
  • Whole term, 620 final votes; 620 of 794 decisions had a final vote recorded by name. The dots are the other members of EPP; no ranks.
  • “No vote recorded” is not the same as absent: leave, illness and chairing the sitting look the same.
  • A group’s line is inferred from its members’ votes — Parliament publishes no whip.

Votes, 5 928

Export

Every roll-call vote of the term with the member’s position, newest first.

Result: for–against–abstained. Majority line: how most of the member’s group voted that day (“Tie” when no position won). ≠ group marks a vote otherwise than a clear line (at least two thirds, with at least 10 members voting) of their group.
DateDecision and voteResultPositionMajority line
22 May 2025Deliberations of the Committee on Petitions in 2023 Amendment 19, adding text after paragraph 2 263 for, 108 against, 222 abstainedPosition: Abstained Majority line: Abstained
22 May 2025Deliberations of the Committee on Petitions in 2023 Amendment 16, adding text after paragraph 2 192 for, 374 against, 20 abstainedPosition: Against Majority line: Against
22 May 2025Deliberations of the Committee on Petitions in 2023 Separate vote on paragraph 2 266 for, 304 against, 22 abstainedPosition: Against Majority line: Against
22 May 2025Amendments to the Capital Requirements Regulation as regards securities financing transactions under the net stable funding ratio Final votePassed 436 for, 149 against, 11 abstainedPosition: For Majority line: For
22 May 2025Euratom Research and Training Programme for the period 2026-2027 complementing Horizon Europe Final votePassed 489 for, 55 against, 38 abstainedPosition: For Majority line: For
22 May 2025Amendments to the Capital Requirements Regulation as regards securities financing transactions under the net stable funding ratio Amendment 6 to Article 1, point 2 Règlement (UE) nº 575/2013 Article 510, paragraph paragraph 7 et 8 259 for, 288 against, 46 abstainedPosition: Against Majority line: Against
22 May 2025Amendments to the Capital Requirements Regulation as regards securities financing transactions under the net stable funding ratio Amendment 1 115 for, 442 against, 41 abstainedPosition: Against Majority line: Against
22 May 2025Granting equivalence to Moldova and Ukraine for field inspections and seed production Final votePassed 374 for, 176 against, 36 abstainedPosition: Against ≠ groupMajority line: For
22 May 2025Granting equivalence to Moldova and Ukraine for field inspections and seed production Amendment 5, adding text after recital 11 177 for, 400 against, 7 abstainedPosition: Against Majority line: Against
22 May 2025Granting equivalence to Moldova and Ukraine for field inspections and seed production Amendment 4, adding text after recital 11 181 for, 396 against, 4 abstainedPosition: Against Majority line: Against
22 May 2025Granting equivalence to Moldova and Ukraine for field inspections and seed production Amendment 3 180 for, 367 against, 43 abstainedPosition: For ≠ groupMajority line: Against
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Final votePassed 411 for, 100 against, 78 abstainedPosition: For Majority line: For
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Amendment 3, adding text after recital 11 164 for, 358 against, 61 abstainedPosition: Abstained ≠ groupMajority line: Against
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Amendment 4, adding text after recital 10 217 for, 348 against, 25 abstainedPosition: Against Majority line: Against
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Amendment 2, adding text after recital 10 176 for, 380 against, 34 abstainedPosition: Abstained ≠ groupMajority line: Against
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Amendment 5, adding text after recital 5 185 for, 362 against, 42 abstainedPosition: Abstained ≠ groupMajority line: Against
22 May 2025Modification of customs duties applicable to imports of certain goods originating in or exported from the Russian Federation and the Republic of Belarus Amendment 6 to Article 2, après le paragraph 2 172 for, 376 against, 41 abstainedPosition: Abstained ≠ groupMajority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Final votePassed 564 for, 20 against, 12 abstainedPosition: For Majority line: For
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 9, adding text after recital 29 171 for, 414 against, 9 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 23, adding text after recital 27 172 for, 405 against, 6 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 14, adding text after recital 27 111 for, 428 against, 52 abstainedPosition: For ≠ groupMajority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 13, adding text after recital 27 114 for, 424 against, 51 abstainedPosition: For ≠ groupMajority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 30, adding text after recital 1 195 for, 387 against, 11 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 29, adding text after recital 1 189 for, 388 against, 17 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 19, adding text after recital 1 164 for, 407 against, 20 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 18, adding text after recital 1 171 for, 407 against, 5 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 17, adding text after recital 1 169 for, 415 against, 8 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 27 to Annex II, point 1 Regulation (EU) 2023/956 Annex VII, point 1 176 for, 411 against, 3 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 12 to Annex I, paragraph 1, point 2, point a Regulation (EU) 2023/956 Annex IV, point 4.1, fourth sentence 163 for, 418 against, 7 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 31 to Article 1, alinéa 1, point 25, sous-point a Règlement (UE) 2023/956 Article 36, paragraph 2, point b 187 for, 387 against, 17 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 26 to Article 1, alinéa 1, point 25, sous-point a Règlement (UE) 2023/956 Article 36, paragraph 2, point b 151 for, 421 against, 22 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 25 to Article 1, alinéa 1, après le point 24 Règlement (UE) 2023/956 après l'article 32 158 for, 411 against, 19 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 15 to Article 1, paragraph 1, après le point 23 Règlement (UE) 2023/956 Article 30, paragraph 2 103 for, 438 against, 47 abstainedPosition: For ≠ groupMajority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendments 7 + 11 (voted as one) to Article 1, alinéa 1, point 21, sous-point a Règlement (UE) 2023/956 Article 26, après le paragraph 1 105 for, 462 against, 14 abstainedPosition: Against Majority line: Against
22 May 2025Amending Regulation (EU) 2023/956 as regards simplifying and strengthening the carbon border adjustment mechanism Amendment 10 to Article 1, alinéa 1, point 16, sous-point b Règlement (UE) 2023/956 Article 22, paragraph 2, point b 159 for, 411 against, 6 abstainedPosition: Against Majority line: Against
21 May 2025Wednesday’s agenda – Request by The Left Group Request by The Left Group 102 for, 378 against, 7 abstainedPosition: Against Majority line: Against
21 May 2025Wednesday’s agenda – Request by the PfE Group Request by the PfE Group 132 for, 334 against, 5 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Final vote — text as a wholeAdopted 306 for, 80 against, 57 abstainedPosition: For Majority line: For
8 May 2025Old challenges and new commercial practices in the internal market Amendment 6, adding text after recital E 172 for, 288 against, 11 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 27, adding text after paragraph 37 146 for, 311 against, 14 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 24 to paragraph 35 164 for, 276 against, 22 abstainedPosition: For ≠ groupMajority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Paragraph 30 — part 2 375 for, 92 against, 6 abstainedPosition: For Majority line: For
8 May 2025Old challenges and new commercial practices in the internal market Paragraph 30 — part 1 444 for, 32 against, 3 abstainedPosition: For Majority line: For
8 May 2025Old challenges and new commercial practices in the internal market Amendment 16 to paragraph 29 100 for, 306 against, 71 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 26 to paragraph 24 86 for, 345 against, 51 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 23, adding text after paragraph 21 — part 2 168 for, 312 against, 1 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 23, adding text after paragraph 21 — part 1 281 for, 193 against, 1 abstainedPosition: For Majority line: For
8 May 2025Old challenges and new commercial practices in the internal market Amendment 14 to paragraph 16 67 for, 378 against, 36 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 25, adding text after paragraph 15 137 for, 326 against, 22 abstainedPosition: Against Majority line: Against
8 May 2025Old challenges and new commercial practices in the internal market Amendment 9 to paragraph 5 127 for, 321 against, 40 abstainedPosition: Against Majority line: Against

Show all 50 votes on this page

Roll-call participation

One cell per sitting while in office, shaded by the share of that day’s roll calls the member voted in. The official attendance register is kept separately by Parliament.

No vote recorded on 2 of 80 sittings with roll calls.

"No vote recorded" is not the same as absent: leave, illness and chairing the sitting look the same.

Data as a table

Voting neighbours

Members who voted the same way most often in the roll calls they both took part in, within and outside the member’s group (group at the date of each vote), over all roll calls of the term.

At least 200 shared roll calls over at least six months in office together. Within = both sat in the same group on the date of the vote; a member who changed group can appear on both lists. Baseline = the median agreement of all pairs of members of the groups the two sat in on the date of each shared vote (within: the group they shared; outside: the two groups), weighted by the votes they shared in each combination.

Within EPP

Agreement: roll calls where both cast the same position, of the roll calls both voted in while in the same group (“shared”); a count below 50 shared. Baseline: the median agreement of every pair of members of that group.
SelectMemberGroupCountryAgreementBaseline
Bogdan Andrzej ZDROJEWSKI EPPPoland95 % of 5 713 shared89 %
Andrzej BUŁA EPPPoland95 % of 5 306 shared89 %
Andrzej HALICKI EPPPoland95 % of 5 275 shared89 %
Ewa KOPACZ EPPPoland95 % of 5 723 shared89 %
Krzysztof BREJZA EPPPoland95 % of 5 397 shared89 %
Magdalena ADAMOWICZ EPPPoland95 % of 5 396 shared89 %
Mirosława NYKIEL EPPPoland94 % of 5 171 shared89 %
Jagna MARCZUŁAJTIS-WALCZAK EPPPoland94 % of 5 439 shared89 %
Bartosz ARŁUKOWICZ EPPPoland94 % of 5 531 shared89 %
Marta WCISŁO EPPPoland94 % of 5 527 shared89 %

Show all 10 neighbours

Outside the group

Agreement: roll calls where both cast the same position, of the roll calls both voted in while in different groups (“shared”); a count below 50 shared. Baseline: the median agreement of every pair of members of the groups the two sat in on those votes (groups at the date, weighted by the votes shared in each combination).
SelectMemberGroupCountryAgreementBaseline
Urmas PAET RenewEstonia84 % of 5 181 shared82 %
Eugen TOMAC RenewRomania82 % of 4 183 shared82 %
Dan BARNA RenewRomania82 % of 5 114 shared82 %
Hilde VAUTMANS RenewBelgium82 % of 5 608 shared82 %
Katri KULMUNI RenewFinland82 % of 4 574 shared82 %
Jeannette BALJEU RenewNetherlands81 % of 5 077 shared82 %
Ivars IJABS RenewLatvia81 % of 4 425 shared82 %
Bart GROOTHUIS RenewNetherlands81 % of 4 378 shared82 %
Benoit CASSART RenewBelgium81 % of 5 306 shared82 %
Anouk VAN BRUG RenewNetherlands81 % of 4 350 shared82 %

Show all 10 neighbours

Work

Seats in committees, delegations and intergroups, and the dossiers the member leads, shadows or negotiates.

Seats

Body: the committee, delegation or intergroup, with its kind. Role: the member’s role in it. From, To: the dates of the seat (“now” while it lasts).
BodyRoleFromTo
Committee on Constitutional AffairsAFCO CommitteeMember19 Jul 2024now
Committee on Civil Liberties, Justice and Home AffairsLIBE CommitteeSubstitute19 Jul 2024now
Special Committee on the European Democracy ShieldEUDS Special committeeMember23 Jan 2025now
Delegation to the EU-Russia Parliamentary Cooperation CommitteeD-RU DelegationMember16 Jul 2024now
Delegation for relations with the Maghreb countries and the Arab Maghreb Union, including the EU-Morocco, EU-Tunisia and EU-Algeria Joint Parliamentary CommitteesDMAG DelegationMember19 Sept 2024now

Show all 5 seats

Dossiers

Dossier: the procedure the declaration names (“No dossier named” for a delegation without one). Role: rapporteur, shadow rapporteur, negotiator or delegation. Committee: the committee that appointed them. Date: of the declaration.
DossierRoleCommitteeDate
No dossier namedDelegation vice-chairD-RU4 Sept 2026
Monitoring and controlling drug precursors and repealing Regulations (EC) No 273/2004 and (EC) No 111/2005RapporteurLIBE10 Feb 2026
Delegation to Morocco for Morocco-EU Joint Parliamentary CommitteeOfficial delegationDMAG22 Oct 2025
EUROPEAN PARLIAMENT’S RIGHT OF INQUIRYShadow rapporteurAFCO10 Jan 2025
No dossier namedDelegation vice-chairD-RU30 Sept 2024
Commission proposal for a Regulation amending Regulation (EU) 2021/1148 (Instrument for Financial Support for Border Management and Visa Policy) as regards the financial envelope and the allocation for the thematic facility - 2024/0059(COD) -Shadow rapporteurLIBE10 Sept 2024

Show all 6 dossier roles

Topics they work on (model-assigned)

Counts: dossiers they spoke on, led or amended, and their questions and motions.

In the chamber

Speeches and statements in plenary debates, newest first; the verbatim report is on Parliament’s site.

21 contributions recorded; 2 on behalf of their group; 31 minutes of speaking time.

Date: the sitting. Debate: the item debated, and the group when they spoke on its behalf. Kind: speech or written statement, with speaking time. Verbatim: the verbatim report on Parliament’s site.
DateDebateKindVerbatim
15 Sept 2026The recent hybrid attacks and instrumentalisation of migrants in Ceuta and the need for a coordinated response to protect the EU’s external borders (debate) Speech · 1 minRead
15 Sept 2026Findings and recommendations of the Special Committee on the European Democracy Shield (debate) Speech · 2 minRead
19 May 2026Europe's response to reduced US military deployments in Europe, particularly at its Eastern flank in the light of the latest US decisions (debate) Speech · 1 minRead
19 May 2026EU governance under pressure – institutional responses to global challenges (debate) on behalf of EPPSpeech · 2 minRead
29 Apr 2026Danger of normalising relations with Russia, including its participation in major cultural and sports events (debate) Speech · 1 minRead
21 Jan 2026Restoring control of migration: returns, visa policy and third-country cooperation (topical debate) Speech · 2 minRead
17 Dec 2025Cases of pro-Russian espionage in the European Parliament (debate) Speech · 2 minRead
15 Dec 2025Murder of Mehdi Kessaci - urgent need for ambitious European action against drug trafficking (debate) Speech · 1 minRead
8 Oct 2025United response to recent Russian violations of the EU Member States’ airspace and critical infrastructure (debate) Speech · 1 minRead
10 Sept 2025State of the Union (debate) Speech · 1 minRead

Show all 21 recent contributions

Questions and motions, 23

Parliamentary questions and motions for resolutions the member authored or co-signed, newest first.

Date: tabled. Title: the question or motion, with its id. Kind: written question or motion for a resolution, with the number of co-authors. Answer: the date of the answer to a question.
DateTitleKindAnswer
13 Jul 2026Missing and runaway children as an indicator of violence, abuse and grooming E-10-2026-002868Written questionwith 15 co-authorsNot yet answered
29 Jun 2026Protecting minors online from manipulation, bullying and grooming E-10-2026-002680Written questionwith 9 co-authors11 Sept 2026
10 Jun 2026MOTION FOR A RESOLUTION on the recruitment of children by organised crime B-10-2026-0275Motion for a resolutionwith 33 co-authors—
9 Jun 2026Chinese tomato concentrate imports: protecting EU producers and food security P-10-2026-002375Priority written questionwith 23 co-authors13 Jul 2026
20 May 2026Russia’s admission to the Biennale Festival and EU funding E-10-2026-002082Written question16 Jul 2026
25 Mar 2026Ensuring competition and strategic autonomy in the AI gigafactory supply chain E-10-2026-001255Written questionwith 17 co-authors19 Jun 2026
24 Feb 2026Ensuring risk assessment as the basis for proportionate regulation of cosmetic products E-10-2026-000762Written questionwith 20 co-authors16 Apr 2026
18 Feb 2026Checks on the presence of prohibited substances and trace impurities in non-EU cosmetic products entering the single market E-10-2026-000688Written questionwith 21 co-authors21 May 2026
18 Feb 2026Inspections to ensure regulatory conformity of cosmetic products in the single market with the Cosmetic Products Regulation E-10-2026-000687Written questionwith 22 co-authorsNot yet answered
9 Feb 2026MOTION FOR A RESOLUTION on World Cancer Day B-10-2026-0141Motion for a resolutionwith 18 co-authors—

Show all 23 questions and motions

Amendments tabled in committee, 13

Committee amendment documents that carry amendments by the member, with how many are theirs.

Date: of the amendment document. Text amended: the dossier and the document’s id. Committee: where the amendments were tabled. Amendments: how many in the document are the member’s.
DateText amendedCommitteeAmendments
23 Jun 2026on the proposal for a regulation of the European Parliament and of the Council establishing the European Fund for economic, social and territorial cohesion, agriculture and rural, fisheries and maritime, prosperity and security for the period 2028-2034 and amending Regulation (EU) 2023/955 and Regulation (EU, Euratom) 2024/2509 CJ71-AM-790099 CJ712
29 Apr 2026Institutional aspects of artificial intelligence in the context of European integration AFCO-AM-787899 AFCO2
17 Mar 2026Amending Decision (EU) 2015/1814 as regards the market stability reserve for the buildings, road transport and additional sector ENVI-AM-785330 ENVI7
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784433 EUDS4
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784407 EUDS2
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784408 EUDS7
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784367 EUDS1
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784405 EUDS7
12 Feb 2026Findings and recommendations of the Special Committee on the European Democracy Shield EUDS-AM-784406 EUDS3
30 Jan 2026Interim report on the proposal for the multiannual financial framework for 2028-2034 BUDG-AM-784187 BUDG3

Show all 13 amendment documents

Connections

Dossiers they lead or shadow, committees, party, delegation and other related pages.

Political group

National delegation

  • Delegation Poland National delegation

Sources & citation

Where the facts on this page come from, and how to cite it.

Data source
Licensed CC BY 4.0.
Data version
data version 7669c786bb14 (1 Oct 2026) · methods: group-at-date v1, participation v1, abstention v1, loyalty v1, against-clear v1, cohesion v1, agreement v1, group-agreement v1, winning-side v1, similar-votes v1, scope v1, data-version v1 · methods
Retrieved
1 October 2026

Cite as

EU Parl Watch Research (2026). “Bartłomiej SIENKIEWICZ”. Member record. memberId 86057. EU Parl Watch Research. https://news.eu-parl.st-solutions.dev/members/86057?page=87&scope=final&vscope=all (retrieved 1 October 2026). Official source: Member’s profile, European Parliament, https://www.europarl.europa.eu/meps/en/86057. Data: EP Open Data: member record, https://data.europarl.europa.eu/api/v2/meps/86057?format=application%2Fld%2Bjson (CC BY 4.0); data version 7669c786bb14 (1 Oct 2026) · methods: group-at-date v1, participation v1, abstention v1, loyalty v1, against-clear v1, cohesion v1, agreement v1, group-agreement v1, winning-side v1, similar-votes v1, scope v1, data-version v1.
BibTeX
@misc{epw-member-86057,
  author = {{EU Parl Watch Research}},
  title = {{Bartłomiej SIENKIEWICZ}},
  year = {2026},
  howpublished = {\url{https://news.eu-parl.st-solutions.dev/members/86057?page=87&scope=final&vscope=all}},
  url = {https://news.eu-parl.st-solutions.dev/members/86057?page=87&scope=final&vscope=all},
  urldate = {2026-10-01},
  publisher = {EU Parl Watch Research},
  note = {Member record. memberId 86057. Official source: https://www.europarl.europa.eu/meps/en/86057. Data: EP Open Data: member record (CC BY 4.0); data version 7669c786bb14 (1 Oct 2026) · methods: group-at-date v1, participation v1, abstention v1, loyalty v1, against-clear v1, cohesion v1, agreement v1, group-agreement v1, winning-side v1, similar-votes v1, scope v1, data-version v1}
}