The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Apr 13, 2026 | Colman Carol L | Director | Sell(S) | 5K | $3.66 | $16K |
| Jul 14, 2025 | Mason Peter Daniel Charles | Director | Buy(P) | 10K | $4.02 | $40K |
| Jun 2, 2025 | Sale Hillary A | Director | Buy(P) | 5K | $3.88 | $20K |
| May 27, 2025 | Grillo Anthony | Director | Buy(P) | 3K | $3.84 | $12K |
| Jan 5, 2022 | Colman Carol L | Director | Sell(S) | 1K | $5.14 | $5K |
| Jan 5, 2022 | Cronin Daniel P | Director | Sell(S) | 3K | $5.10 | $16K |
| Aug 27, 2021 | Colman Carol L | Director | Sell(S) | 3K | $5.24 | $13K |
| Jun 7, 2021 | Colman Carol L | Director | Sell(S) | 6K | $5.23 | $33K |
| Dec 16, 2020 | Hutchinson William R | Director | Sell(S) | 8K | $5.02 | $38K |
| Nov 20, 2020 | Saba Capital Management, L.P. | 10% Owner | Disposed to issuer(D) | 6.3M | $5.37 | $33.9M |
| Nov 20, 2020 | Saba Capital Management, L.P. | 10% Owner | Sell(S) | 152K | $4.98 | $758K |
| Nov 19, 2020 | Cronin Daniel P | Director | Sell(S) | 3K | $5.37 | $17K |
| Nov 3, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 400K | $4.89 | $2.0M |
| Oct 30, 2020 | Saba Capital Management, L.P. | 10% Owner | Sell(S) | 67K | $4.89 | $326K |
| Oct 28, 2020 | Saba Capital Management, L.P. | 10% Owner | Sell(S) | 108K | $4.89 | $530K |
| Oct 26, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 66K | $4.95 | $324K |
| Oct 23, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 17K | $4.98 | $83K |
| Sep 8, 2020 | Colman Carol L | Director | Sell(S) | 2K | $4.96 | $10K |
| Jul 27, 2020 | Colman Carol L | Director | Sell(S) | 2K | $4.81 | $8K |
| Jul 10, 2020 | Colman Carol L | Director | Sell(S) | 700 | $4.67 | $3K |
| Mar 20, 2020 | Saba Capital Management, L.P. | 10% Owner | Buy(P) | 150K | $3.70 | $555K |
| Mar 19, 2020 | Weinstein Boaz | 10% Owner | Other(J) | 2.9M | $3.46 | $10.1M |
| Feb 25, 2020 | Saba Capital Management, L.P. | 10% Owner | Buy(P) | 139K | $5.18 | $718K |
| Feb 21, 2020 | Weinstein Boaz | 10% Owner | Buy(P) | 128K | $5.25 | $672K |
| Feb 20, 2020 | Saba Capital Management, L.P. | 10% Owner | Buy(P) | 288K | $5.25 | $1.5M |
| Feb 19, 2020 | Saba Capital Management, L.P. | 10% Owner | Buy(P) | 1.4M | $5.26 | $7.6M |
| Feb 14, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 132K | $5.16 | $682K |
| Feb 13, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 765K | $5.15 | $3.9M |
| Feb 12, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 413K | $5.15 | $2.1M |
| Feb 11, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 316K | $5.15 | $1.6M |
| Feb 10, 2020 | Weinstein Boaz | 10% Owner | Sell(S) | 111K | $5.15 | $572K |
| Jan 4, 2017 | Cronin Daniel P | Director | Buy(P) | 2K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2019-09-30 → 2026-08-08. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for HIO