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HALLSTATT ADVISORS L.P.

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13F filer, CIK 2040638, NEW YORK, NY

HALLSTATT ADVISORS L.P. reported $126,406,781 across 15 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-07. Its ten largest share positions make up 84.92% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001214659-26-005718

Period
2026-03-31
Reported value
$126M
Holdings
15
Top 10 weight
84.92%
New
5
Sold out
6

Largest buys vs the previous quarter

SecurityShares changeApprox. value
VSTnew+69,077$10.4M
SECYFnew+501,743$7.87M
BDCnew+61,576$7.07M
SEInew+120,209$6.79M
GFLadded+125,721$5.25M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
AERreduced-83,205-$11.4M
IEXexited-46,411-$8.26M
MTreduced-117,966-$6.13M
HUBGexited-133,823-$5.7M
EMRexited-41,978-$5.57M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q1 2026

Share positions as resolved from 13F-HR 0001214659-26-005718, largest first. % of portfolio is the value over $126,406,781, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
GVAGRANITE CONSTR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 141,003 shares; 2026Q1: 132,484 shares 132,484$15.9M12.56%-8,519Timeline
GFLGFL ENVIRONMENTAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 193,551 shares; 2026Q1: 319,272 shares 319,272$13.3M10.54%+125,721Timeline
CLHCLEAN HARBORS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 65,101 shares; 2026Q1: 46,115 shares 46,115$13.2M10.46%-18,986Timeline
CWSTCASELLA WASTE SYS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 145,140 shares; 2026Q1: 165,385 shares 165,385$13.1M10.38%+20,245Timeline
TELTE CONNECTIVITY PLCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 36,447 shares; 2026Q1: 52,924 shares 52,924$11.1M8.75%+16,477Timeline
VSTVISTRA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: 69,077 shares 69,077$10.4M8.22%newTimeline
CTRICENTURI HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 344,621 shares; 2026Q1: 285,721 shares 285,721$8.35M6.6%-58,900Timeline
SECYFSECURE WASTE INFRASTRUCTUREQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: 501,743 shares 501,743$7.87M6.23%newTimeline
EXPEAGLE MATLS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 36,279 shares; 2026Q1: 37,323 shares 37,323$7.07M5.59%+1,044Timeline
BDCBELDEN INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: 61,576 shares 61,576$7.07M5.59%newTimeline
MRVLMARVELL TECHNOLOGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 97,023 shares; 2026Q1: 69,828 shares 69,828$6.92M5.47%-27,195Timeline
SEISOLARIS ENERGY INFRAS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: 120,209 shares 120,209$6.79M5.37%newTimeline
MTARCELORMITTAL SA LUXEMBOURGQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 187,455 shares; 2026Q1: 69,489 shares 69,489$3.61M2.86%-117,966Timeline
AERAERCAP HOLDINGS NVQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 93,245 shares; 2026Q1: 10,040 shares 10,040$1.38M1.09%-83,205Timeline
SMERYSIEMENS ENERGY AG SPON ADRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not loaded; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: not reported; 2026Q1: 2,125 shares 2,125$359K0.28%newTimeline

Sold out in Q1 2026

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
IEXIDEX CORP46,411$8.26Mshares
HUBGHUB GROUP INC133,823$5.7Mshares
EMREMERSON ELEC CO41,978$5.57Mshares
FSLRFIRST SOLAR INC10,588$2.77Mshares
OCOWENS CORNING NEW23,200$2.6Mshares
SIEMENS ENERGY AGSIEMENS ENERGY AG4,116$577Kshares

How Q1 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001214659-26-005718 base2026-05-07acceptance time not in the bulk data set