Linda Kay Zecher is See remarks. at Houghton Mifflin Harcourt Co (HMHC). They have made 17 open-market trades across 3 companies since 2014, most recently 2026-08-19.
CIK 0001585799
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 17 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| HMHC | 232,874 | $4.9M |
| HAS | 18,453 | $1.8M |
| TENB | 7,012 | $261K |
| Total | $7.0M |
Shares reported on the most recent Form 4, priced at the 2026-08-20 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TENB | SELL | 2026-08-18 | 2026-08-20 | $35.61 | $49K | +6.1% | +8.3% | — |
| TENB | SELL | 2026-08-03 | 2026-08-11 | $34.98 | $92K | -8.1% | -14.4% | — |
| TENB | SELL | 2025-03-11 | 2025-03-13 | $37.00 | $93K | +3.5% | -7.1% | -11.7% |
| TENB | SELL | 2024-05-23 | 2024-05-23 | $43.47 | $204K | -3.9% | -5.6% | -0.5% |
| TENB | SELL | 2024-02-09 | 2024-02-09 | $50.75 | $132K | -9.2% | -8.7% | -12.8% |
| TENB | SELL | 2023-11-06 | 2023-11-07 | $37.20 | $107K | +3.9% | +7.4% | +23.6% |
| TENB | SELL | 2023-06-05 | 2023-06-07 | $40.56 | $105K | +5.1% | +7.2% | +14.3% |
| TENB | SELL | 2023-04-27 | 2023-04-28 | $36.49 | $242K | +2.9% | +8.3% | +29.5% |
| TENB | SELL | 2023-02-10 | 2023-02-14 | $44.24 | $310K | -2.2% | -0.0% | -15.2% |
| TENB | SELL | 2022-08-10 | 2022-08-10 | $45.00 | $100K | -7.9% | -5.9% | -19.2% |
| TENB | SELL | 2022-06-07 | 2022-06-09 | $52.00 | $100K | -2.5% | +6.2% | -20.6% |
| TENB | SELL | 2021-09-15 | 2021-09-16 | $47.08 | $200K | -3.0% | +8.7% | +8.9% |
| TENB | SELL | 2021-06-08 | 2021-06-10 | $42.82 | $171K | +4.5% | -4.4% | +6.9% |
| HAS | SELL | 2020-08-24 | 2020-08-26 | $79.61 | $130K | -1.7% | -3.1% | +15.9% |
| TENB | SELL | 2020-08-10 | 2020-08-12 | $32.20 | $372K | +5.4% | +6.0% | +2.3% |
| HMHC | SELL | 2016-04-28 | 2016-05-02 | $21.02 | $210K | -13.1% | -15.6% | -14.9% |
| HMHC | SELL | 2016-04-20 | 2016-04-22 | $21.00 | $282K | -9.0% | -17.1% | -17.7% |
| HMHC | SELL · 10b5-1 | 2015-12-24 | 2015-12-28 | $21.00 | $1.6M | -17.6% | -18.1% | -9.8% |
| HMHC | SELL · 10b5-1 | 2015-10-20 | 2015-10-21 | $21.00 | $139K | -17.6% | -4.3% | -20.5% |
| HMHC | SELL · 10b5-1 | 2015-10-15 | 2015-10-19 | $21.02 | $1.4M | -17.6% | -4.3% | -20.5% |
| HMHC | SELL · 10b5-1 | 2015-09-15 | 2015-09-16 | $21.66 | $1.6M | -17.6% | -4.3% | -4.3% |
| HMHC | SELL · 10b5-1 | 2015-08-17 | 2015-08-19 | $23.56 | $1.8M | -17.6% | -4.3% | -4.3% |
| HMHC | SELL · 10b5-1 | 2015-07-15 | 2015-07-16 | $26.00 | $1.9M | -17.6% | -4.3% | -4.3% |
| HMHC | SELL · 10b5-1 | 2015-06-15 | 2015-06-17 | $26.56 | $2.0M | -17.6% | -4.3% | -4.3% |
| HMHC | SELL · 10b5-1 | 2015-05-18 | 2015-05-20 | $23.47 | $962K | -17.6% | -4.3% | -4.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.