WAVEMAN · COMPANY

ABCP · Ambase Corp

LIVE

TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475

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ABCP

Name: AmBase Corp (ABCP) insider trading and ownership data
Creator: WaveMan
License: https://wave-man.com/terms

AmBase Corp

REAL ESTATE · OPEATORS OF NONRESIDENTIAL BUILDINGS · CIK 0000020639

SEC FILINGS☆ WATCH

INSIDER NET · 180D

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

13F, latest reported quarter

REVENUE GROWTH

XBRL, annual

NET MARGIN

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

no Form 4 purchases or sales on file

CONGRESS

no member of Congress has reported trading it

FUNDS

fewer than five institutions report holding it

REVENUE

no revenue reported in any filing

MARGIN

no margin: this company reports no revenue to divide by

BUYBACKS

no share repurchases reported

SHORT

<0.1% of shares outstanding short · 2.7 days to cover · settled 2026-07-31

below 91% of Real Estate

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN -5.0%

-5.0%12M

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

The complete filing record, in one place.

Every figure on this page is a federal filing, dated the day it became public — so you can test what was knowable, not what is known now.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

FPH OPEN AXR FTHM JOE FRPH CBRE COMP RMAX TPHS ZDPY AEI

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

No insider purchases or sales are on record for AmBase Corp in the period covered. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER

FILED

VALUE

Barc Investments LLC

—

BUY

2024-04-30

909,691.0

$191.0K

Barc Investments LLC

—

BUY

2024-02-28

44,200,460.0

$8.8M

Camac Fund, LP

—

SELL

2024-02-20

1,102,170.0

$242.5K

Camac Fund, LP

—

SELL

2024-02-16

1,693,021.0

$423.3K

Camac Fund, LP

—

SELL

2024-02-15

383,116.0

$95.8K

21 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 16 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

no 13F holders found for this ticker

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12	2022-12
OPERATING INCOME	$-4.3M	$-6.5M	$-5.0M	$-3.4M
NET INCOME	$-4.6M	$-6.6M	$-5.3M	$-3.5M
OPERATING CASH FLOW	$-2.3M	$-8.9M	$-3.5M	$-2.7M
CASH	$87.0K	$314.0K	$78.0K	$349.0K
LONG-TERM DEBT	—	—	$3.2M	$0

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE