13F Insight
DOSSIER · 13F Holders · Q1 2026High-convictionMulti-bagger
TRMLF

TOURMALINE OIL CORP COM

4 institutions still hold TOURMALINE OIL CORP COM as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 89156V106·4 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 5.6%
vs prior quarter
13F value held
$20M
68.0% inst. owned
of float
Holders
4
+33 QoQ
filers reporting
Activity
+106 / −98
+1,038 added · −828 reduced
this quarter
Concentration
93.35%
GRACE & WHITE INC /NY #1
top holder share
AI Holders Summary · Q1 2026

4 institutions reported TRMLF in Q1 2026. GRACE & WHITE INC /NY leads at 93.4% of the visible book. +33 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
GRACE & WHITE INC /NY
CIK 0000903064
$19M397K3.35%Q1 202602
KAHN BROTHERS GROUP INC
CIK 0001039565
$1M27K0.23%Q1 202603
PNC FINANCIAL SERVICES GROUP, INC.
CIK 0000713676
$63,1081K0.00%Q4 202504
Golden State Equity Partners
CIK 0001845003
$2,249470.00%Q1 2026