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AmBase Corp

ABCP
Exchange
OTC
Industry
Opeators of Nonresidential Buildings
SEC CIK
0000020639

No open-market purchases or sales by AmBase Corp insiders were filed in the last 90 days; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.

Q4 2021 vs. Q3 2021

How the institutions holding AmBase Corp changed between Q3 2021 and Q4 2021.

All holders in Q4 2021All holders in Q3 2021

13F holders of ABCP: Q3 2021 compared with Q4 2021
MeasureQ3 2021Q4 2021Change
Holders12+1
Shares345.5K345.5K+20 (0.0%)
Value$102.0K$121.0K+$19.0K (+18.6%)

New holders (1)

Institutions that held AmBase Corp at the end of Q4 2021 but not at the end of Q3 2021.

Institutions new to ABCP in Q4 2021
InstitutionSharesValue% of portfolio
Huntington National Bank20$00.00%

Sold out (0)

Institutions that held AmBase Corp at the end of Q3 2021 and filed for Q4 2021 without it.

None.