Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.
| Quarter | Action | Shares change | Est. value change | Δ Own | Shares held | Filing date |
|---|---|---|---|---|---|---|
| Q4 2021 | Exited | −8K | – | −100.0% | 0 | Feb 14, 2022 |
| Q3 2021 | New | +8K | – | – | 8K | Nov 15, 2021 |
Not currently. Joel Greenblatt fully exited RBBN in Q4 2021, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
Joel Greenblatt first disclosed a RBBN position in Q3 2021; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
Yes. Joel Greenblatt reduced and then fully exited RBBN by Q4 2021; the reductions are in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
None as of the latest filing: Joel Greenblatt has exited RBBN. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
Joel Greenblatt began building the RBBN position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.
