Richard J. Mitrano
CIK 1785287 · View on SEC EDGAR ↗
Insider
First SEC filing: April 15, 2022 · Latest: April 15, 2022
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 28 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
28 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 21, 2023 | KRRO | S 10b5-1 | 237 | $0.53 | $126 | 48,457 Direct | -0.49% | Disposed | -49.0% (price as of 2026-08-20) |
| Aug. 18, 2023 | KRRO | S 10b5-1 | 227 | $0.63 | $143 | 48,694 Direct | -0.46% | Disposed | -57.1% (price as of 2026-08-20) |
| Aug. 17, 2023 | KRRO | S 10b5-1 | 230 | $0.62 | $143 | 48,921 Direct | -0.47% | Disposed | -56.4% (price as of 2026-08-20) |
| Aug. 16, 2023 | KRRO | S 10b5-1 | 234 | $0.67 | $157 | 49,151 Direct | -0.47% | Disposed | -59.7% (price as of 2026-08-20) |
| Aug. 15, 2023 | KRRO | S 10b5-1 | 228 | $0.65 | $148 | 49,385 Direct | -0.46% | Disposed | -58.4% (price as of 2026-08-20) |
| Aug. 14, 2023 | KRRO | S 10b5-1 | 238 | $0.64 | $152 | 49,613 Direct | -0.48% | Disposed | -57.8% (price as of 2026-08-20) |
| Aug. 11, 2023 | KRRO | S 10b5-1 | 240 | $0.64 | $154 | 49,851 Direct | -0.48% | Disposed | -57.8% (price as of 2026-08-20) |
| Aug. 10, 2023 | KRRO | S 10b5-1 | 247 | $0.64 | $158 | 50,091 Direct | -0.49% | Disposed | -57.8% (price as of 2026-08-20) |
| Aug. 9, 2023 | KRRO | S 10b5-1 | 238 | $0.66 | $157 | 50,338 Direct | -0.47% | Disposed | -59.1% (price as of 2026-08-20) |
| Aug. 8, 2023 | KRRO | S 10b5-1 | 241 | $0.67 | $161 | 50,576 Direct | -0.47% | Disposed | -59.7% (price as of 2026-08-20) |
| Aug. 7, 2023 | KRRO | S 10b5-1 | 235 | $0.69 | $162 | 50,817 Direct | -0.46% | Disposed | -60.8% (price as of 2026-08-20) |
| Aug. 4, 2023 | KRRO | S 10b5-1 | 220 | $0.67 | $147 | 51,052 Direct | -0.43% | Disposed | -59.7% (price as of 2026-08-20) |
| Aug. 3, 2023 | KRRO | S 10b5-1 | 232 | $0.56 | $130 | 51,272 Direct | -0.45% | Disposed | -51.8% (price as of 2026-08-20) |
| Aug. 2, 2023 | KRRO | S 10b5-1 | 231 | $0.49 | $113 | 51,504 Direct | -0.45% | Disposed | -44.9% (price as of 2026-08-20) |
| Aug. 1, 2023 | KRRO | S 10b5-1 | 238 | $0.48 | $114 | 51,735 Direct | -0.46% | Disposed | -43.7% (price as of 2026-08-20) |
| July 31, 2023 | KRRO | S 10b5-1 | 222 | $0.50 | $111 | 51,973 Direct | -0.43% | Disposed | -46.0% (price as of 2026-08-20) |
| July 28, 2023 | KRRO | S 10b5-1 | 223 | $0.47 | $105 | 52,195 Direct | -0.43% | Disposed | -42.5% (price as of 2026-08-20) |
| July 27, 2023 | KRRO | S 10b5-1 | 227 | $0.53 | $120 | 52,418 Direct | -0.43% | Disposed | -49.0% (price as of 2026-08-20) |
| July 26, 2023 | KRRO | S 10b5-1 | 222 | $0.53 | $118 | 52,645 Direct | -0.42% | Disposed | -49.0% (price as of 2026-08-20) |
| July 25, 2023 | KRRO | S 10b5-1 | 234 | $0.50 | $117 | 52,867 Direct | -0.44% | Disposed | -46.0% (price as of 2026-08-20) |
| July 24, 2023 | KRRO | S 10b5-1 | 234 | $0.56 | $131 | 53,101 Direct | -0.44% | Disposed | -51.8% (price as of 2026-08-20) |
| July 21, 2023 | KRRO | S 10b5-1 | 223 | $0.61 | $136 | 53,335 Direct | -0.42% | Disposed | -55.7% (price as of 2026-08-20) |
| July 20, 2023 | KRRO | S 10b5-1 | 229 | $0.64 | $147 | 53,558 Direct | -0.43% | Disposed | -57.8% (price as of 2026-08-20) |
| July 19, 2023 | KRRO | S 10b5-1 | 228 | $0.63 | $144 | 53,787 Direct | -0.42% | Disposed | -57.1% (price as of 2026-08-20) |
| July 18, 2023 | KRRO | S 10b5-1 | 249 | $0.56 | $139 | 54,015 Direct | -0.46% | Disposed | -51.8% (price as of 2026-08-20) |
| July 17, 2023 | KRRO | S 10b5-1 | 244 | $0.65 | $159 | 54,264 Direct | -0.45% | Disposed | -58.4% (price as of 2026-08-20) |
| July 14, 2023 | KRRO | S 10b5-1 | 148 | $0.60 | $89 | 54,508 Direct | -0.27% | Disposed | -55.0% (price as of 2026-08-20) |
| July 13, 2023 | KRRO | S 10b5-1 | 227 | $0.39 | $89 | 54,656 Direct | -0.41% | Disposed | -30.7% (price as of 2026-08-20) |
| July 12, 2023 | KRRO | S 10b5-1 | 220 | $0.40 | $88 | 54,883 Direct | -0.40% | Disposed | -32.5% (price as of 2026-08-20) |
| July 11, 2023 | KRRO | S 10b5-1 | 228 | $0.37 | $84 | 55,103 Direct | -0.41% | Disposed | -27.0% (price as of 2026-08-20) |
| July 10, 2023 | KRRO | S 10b5-1 | 220 | $0.37 | $81 | 55,331 Direct | -0.40% | Disposed | -27.0% (price as of 2026-08-20) |
| July 10, 2023 | KRRO | S 10b5-1 | 220 | $0.37 | $81 | 32,605 Direct | -0.67% | Disposed | -27.0% (price as of 2026-08-20) |
| July 7, 2023 | KRRO | S 10b5-1 | 220 | $0.36 | $79 | 55,551 Direct | -0.39% | Disposed | -24.9% (price as of 2026-08-20) |
| July 7, 2023 | KRRO | S 10b5-1 | 220 | $0.36 | $79 | 32,067 Direct | -0.68% | Disposed | -24.9% (price as of 2026-08-20) |
| July 6, 2023 | KRRO | S 10b5-1 | 224 | $0.35 | $78 | 55,771 Direct | -0.40% | Disposed | -22.8% (price as of 2026-08-20) |
| July 6, 2023 | KRRO | S 10b5-1 | 224 | $0.35 | $78 | 31,529 Direct | -0.71% | Disposed | -22.8% (price as of 2026-08-20) |
| July 6, 2022 | KRRO | S | 2,184 | $1.54 | $3,363 | 30,995 Direct | -6.58% | Disposed | -82.5% (price as of 2026-08-20) |
| Oct. 7, 2019 | KRRO | P | 107 | $14.00 | $1,498 | 15,673 Direct | +0.69% | Acquired | -98.1% (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| July 10, 2023 | KRRO | Restricted Stock Unit | Common Stock (758) | — | — | 758 | Disposed |
| July 7, 2023 | KRRO | Restricted Stock Unit | Common Stock (758) | — | — | 758 | Disposed |
| July 6, 2023 | KRRO | Restricted Stock Unit | Common Stock (758) | — | — | 758 | Disposed |
| July 5, 2023 | KRRO | Restricted Stock Unit | Common Stock (758) | — | — | 758 | Disposed |
| July 4, 2023 | KRRO | Restricted Stock Unit | Common Stock (25,000) | — | — | 25,000 | Disposed |
| Jan. 26, 2023 | KRRO | Restricted Stock Unit | Common Stock (91,000) | — | — | 91,000 | Acquired |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (11,550) | $35.85 | Jan. 14, 2031 | 11,550 | Disposed |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (11,550) | $2.14 | Jan. 14, 2031 | 11,550 | Acquired |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (18,000) | $25.05 | Feb. 11, 2030 | 18,000 | Disposed |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (18,000) | $2.14 | Feb. 11, 2030 | 18,000 | Acquired |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (17,816) | $14.00 | Oct. 1, 2029 | 17,816 | Disposed |
| Aug. 17, 2022 | KRRO | Stock Option | Common Stock (17,816) | $2.14 | Oct. 1, 2029 | 17,816 | Acquired |
| July 5, 2022 | KRRO | Restricted Stock Unit | Common Stock (7,500) | — | — | 7,500 | Disposed |
| June 3, 2020 | KRRO | Stock Option | Common Stock (2,552) | $0.61 | June 28, 2027 | 2,552 | Disposed |
| June 3, 2020 | KRRO | Stock Option | Common Stock (929) | $0.07 | Dec. 5, 2026 | 929 | Disposed |
| Feb. 12, 2020 | KRRO | Stock Option | Common Stock (18,000) | $25.05 | Feb. 11, 2030 | 18,000 | Acquired |
| Oct. 7, 2019 | KRRO | Series B Preferred Stock | Common Stock (4,032) | — | — | 27,160 | Disposed |
| Oct. 2, 2019 | KRRO | Stock Option | Common Stock (17,816) | $14.00 | Oct. 1, 2029 | 17,816 | Acquired |
| April 17, 2019 | KRRO | Stock Option [F1] | Common Stock (33,305) | $3.37 | April 16, 2029 | 33,305 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 13 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 15, 2022 | KRRO | Common Stock | 25,679 | Direct |
| April 15, 2022 | KRRO | Common Stock | 4,032 | Indirect |
| April 15, 2022 | KRRO | Restricted Stock Units→ Common Stock (25,000) | 25,000 | Direct |
| April 15, 2022 | KRRO | Restricted Stock Units→ Common Stock (7,500) | 7,500 | Direct |
| April 15, 2022 | KRRO | Stock Option (Right to Buy)→ Common Stock (11,550) | 11,550 | Direct |
| April 15, 2022 | KRRO | Stock Option (Right to Buy)→ Common Stock (18,000) | 18,000 | Direct |
| April 15, 2022 | KRRO | Stock Option (Right to Buy)→ Common Stock (17,816) | 17,816 | Direct |
| April 15, 2022 | KRRO | Stock Option (Right to Buy)→ Common Stock (28,805) | 28,805 | Direct |
| Oct. 2, 2019 | KRRO | Common Stock | 11,534 | Direct |
| Oct. 2, 2019 | KRRO | Series B Preferred Stock→ Common Stock (4,032) | 4,032 | Indirect |
| Oct. 2, 2019 | KRRO | Stock Option→ Common Stock (1,053) | 1,053 | Direct |
| Oct. 2, 2019 | KRRO | Stock Option→ Common Stock (3,743) | 3,743 | Direct |
| Oct. 2, 2019 | KRRO | Stock Option→ Common Stock (33,305) | 33,305 | Direct |