Colin Walsh
Insider
First SEC filing: Aug. 5, 2026 · Latest: Aug. 5, 2026
Insider at
Insider transactions
10 buys (P)
46 sells (S)
Net: $18,314,760
Avg return of open purchases vs now: -13.3%
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 6, 2026 | ATTO | C | 1,957,134 | · | · | 2,042,134 Indirect | +2302.51% | Acquired | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 478,498 | · | · | 2,520,632 Indirect | +23.43% | Acquired | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | P | 500,000 | $17.00 | $8,500,000 | 3,020,632 Indirect | +19.84% | Acquired | 2.9% (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 18,181,830 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 4,445,275 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 1,957,134 | · | · | 2,042,134 Indirect | +2302.51% | Acquired | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 478,498 | · | · | 2,520,632 Indirect | +23.43% | Acquired | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | P | 500,000 | $17.00 | $8,500,000 | 3,020,632 Indirect | +19.84% | Acquired | 2.9% (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 18,181,830 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 6, 2026 | ATTO | C | 4,445,275 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 85,000 | $21.00 | $1,785,000 | 85,000 Indirect | · | Acquired | -16.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 988 | $22.03 | $21,766 | 84,012 Indirect | -1.16% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 447 | $21.87 | $9,776 | 83,565 Indirect | -0.53% | Disposed | -20.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,332 | $22.03 | $29,344 | 82,233 Indirect | -1.59% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.05 | $4,410 | 82,033 Indirect | -0.24% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,556 | $22.06 | $34,325 | 80,477 Indirect | -1.90% | Disposed | -20.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 3,402 | $22.02 | $74,912 | 77,075 Indirect | -4.23% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.10 | $4,420 | 76,875 Indirect | -0.26% | Disposed | -20.8% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 480 | $21.55 | $10,344 | 76,395 Indirect | -0.62% | Disposed | -18.8% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 100 | $22.11 | $2,211 | 76,295 Indirect | -0.13% | Disposed | -20.9% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 753 | $21.97 | $16,543 | 75,542 Indirect | -0.99% | Disposed | -20.3% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 672 | $22.02 | $14,797 | 74,870 Indirect | -0.89% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 6,970 | $22.03 | $153,549 | 67,900 Indirect | -9.31% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 400 | $22.02 | $8,808 | 67,500 Indirect | -0.59% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,180 | $21.84 | $25,771 | 66,320 Indirect | -1.75% | Disposed | -19.9% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,040 | $22.05 | $22,932 | 65,280 Indirect | -1.57% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 300 | $20.84 | $6,252 | 64,980 Indirect | -0.46% | Disposed | -16.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 443 | $21.78 | $9,649 | 64,537 Indirect | -0.68% | Disposed | -19.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.05 | $4,410 | 64,337 Indirect | -0.31% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 700 | $22.07 | $15,449 | 63,637 Indirect | -1.09% | Disposed | -20.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,163 | $22.19 | $25,807 | 62,474 Indirect | -1.83% | Disposed | -21.1% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 100 | $21.99 | $2,199 | 62,374 Indirect | -0.16% | Disposed | -20.4% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 6,763 | $21.61 | $146,148 | 55,611 Indirect | -10.84% | Disposed | -19.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 76,418 | $21.04 | $1,607,835 | 0 Indirect | -100.00% | Disposed | -16.8% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 2,872 | $21.22 | $60,944 | 2,872 Indirect | · | Acquired | -17.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 28,717 | $21.22 | $609,375 | 31,589 Indirect | +999.90% | Acquired | -17.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 11,488 | $21.22 | $243,775 | 43,077 Indirect | +36.37% | Acquired | -17.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 45,588 | $21.27 | $969,657 | 88,665 Indirect | +105.83% | Acquired | -17.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 11,398 | $21.27 | $242,435 | 100,063 Indirect | +12.86% | Acquired | -17.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 5,744 | $21.22 | $121,888 | 105,807 Indirect | +5.74% | Acquired | -17.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | P | 85,000 | $21.00 | $1,785,000 | 85,000 Indirect | · | Acquired | -16.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 988 | $22.03 | $21,766 | 84,012 Indirect | -1.16% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 447 | $21.87 | $9,776 | 83,565 Indirect | -0.53% | Disposed | -20.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,332 | $22.03 | $29,344 | 82,233 Indirect | -1.59% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.05 | $4,410 | 82,033 Indirect | -0.24% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,556 | $22.06 | $34,325 | 80,477 Indirect | -1.90% | Disposed | -20.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 3,402 | $22.02 | $74,912 | 77,075 Indirect | -4.23% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.10 | $4,420 | 76,875 Indirect | -0.26% | Disposed | -20.8% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 480 | $21.55 | $10,344 | 76,395 Indirect | -0.62% | Disposed | -18.8% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 100 | $22.11 | $2,211 | 76,295 Indirect | -0.13% | Disposed | -20.9% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 753 | $21.97 | $16,543 | 75,542 Indirect | -0.99% | Disposed | -20.3% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 672 | $22.02 | $14,797 | 74,870 Indirect | -0.89% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 6,970 | $22.03 | $153,549 | 67,900 Indirect | -9.31% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 400 | $22.02 | $8,808 | 67,500 Indirect | -0.59% | Disposed | -20.5% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,180 | $21.84 | $25,771 | 66,320 Indirect | -1.75% | Disposed | -19.9% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,040 | $22.05 | $22,932 | 65,280 Indirect | -1.57% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 300 | $20.84 | $6,252 | 64,980 Indirect | -0.46% | Disposed | -16.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 443 | $21.78 | $9,649 | 64,537 Indirect | -0.68% | Disposed | -19.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 200 | $22.05 | $4,410 | 64,337 Indirect | -0.31% | Disposed | -20.6% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 700 | $22.07 | $15,449 | 63,637 Indirect | -1.09% | Disposed | -20.7% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 1,163 | $22.19 | $25,807 | 62,474 Indirect | -1.83% | Disposed | -21.1% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 100 | $21.99 | $2,199 | 62,374 Indirect | -0.16% | Disposed | -20.4% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 6,763 | $21.61 | $146,148 | 55,611 Indirect | -10.84% | Disposed | -19.0% (price as of 2026-10-06) |
| Aug. 5, 2026 | ATTO | S | 76,418 | $21.04 | $1,607,835 | 0 Indirect | -100.00% | Disposed | -16.8% (price as of 2026-10-06) |
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 |
|---|---|---|---|---|---|---|---|
| Aug. 6, 2026 | ATTO | Series B Preferred Stock | Common Stock | · | · | 18,181,830 | Disposed |
| Aug. 6, 2026 | ATTO | Series C Preferred Stock | Common Stock | · | · | 4,445,275 | Disposed |
| Aug. 6, 2026 | ATTO | Series B Preferred Stock | Common Stock | · | · | 18,181,830 | Disposed |
| Aug. 6, 2026 | ATTO | Series C Preferred Stock | Common Stock | · | · | 4,445,275 | Disposed |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 2,872 | Acquired |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 28,717 | Acquired |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 11,488 | Acquired |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 45,588 | Acquired |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 11,398 | Acquired |
| Aug. 5, 2026 | ATTO | Equity Swap | Common Stock | · | · | 5,744 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.