Peter I Tumminello
CIK 1491158 · View on SEC EDGAR ↗
Insider
First SEC filing: July 6, 2021 · Latest: July 6, 2021
On this page
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-271,852
+ 16 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
16 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 26, 2026 | DTM | S | 2,002 | $135.79 | $271,852 | 11,386 Direct | -14.95% | Disposed | -4.4% (price as of 2026-08-21) |
| Oct. 14, 2024 | DTM | P | 73 | $86.28 | $6,298 | 11,945 Direct | +0.61% | Acquired | 50.5% (price as of 2026-08-21) |
| July 12, 2024 | DTM | P | 88 | $71.13 | $6,259 | 11,172 Direct | +0.79% | Acquired | 82.5% (price as of 2026-08-21) |
| April 11, 2024 | DTM | P | 98 | $62.99 | $6,173 | 11,084 Direct | +0.89% | Acquired | 106.1% (price as of 2026-08-21) |
| Jan. 11, 2024 | DTM | P | 108 | $53.18 | $5,743 | 10,986 Direct | +0.99% | Acquired | 144.2% (price as of 2026-08-21) |
| Oct. 12, 2023 | DTM | P | 104 | $54.74 | $5,693 | 10,878 Direct | +0.97% | Acquired | 137.2% (price as of 2026-08-21) |
| July 13, 2023 | DTM | P | 106 | $52.64 | $5,580 | 10,108 Direct | +1.06% | Acquired | 146.7% (price as of 2026-08-21) |
| May 23, 2023 | DTM | P | 5,000 | $47.35 | $236,750 | 9,888 Direct | +102.29% | Acquired | 174.2% (price as of 2026-08-21) |
| April 13, 2023 | DTM | P | 43 | $49.02 | $2,108 | 3,114 Direct | +1.40% | Acquired | 164.9% (price as of 2026-08-21) |
| Jan. 12, 2023 | DTM | P | 35 | $54.96 | $1,924 | 3,071 Direct | +1.15% | Acquired | 136.2% (price as of 2026-08-21) |
| Oct. 13, 2022 | DTM | P | 35 | $54.36 | $1,903 | 3,035,323 Direct | 0.00% | Acquired | 138.9% (price as of 2026-08-21) |
| Aug. 8, 2022 | DTM | P | 3,000 | $54.80 | $164,400 | 3,000 Direct | — | Acquired | 136.9% (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| May 5, 2026 | DTM | Restricted Stock Units | Common Stock (1,093) | — | — | 1,093 | Acquired |
| Aug. 2, 2025 | DTM | Restricted Stock Units | Common Stock (1,208) | — | — | 1,208 | Disposed |
| May 6, 2025 | DTM | Restricted Stock Units | Common Stock (1,145) | — | — | 1,145 | Acquired |
| Aug. 2, 2024 | DTM | Restricted Stock Units | Common Stock (604) | — | — | 604 | Disposed |
| Aug. 2, 2024 | DTM | Restricted Stock Units | Common Stock (604) | — | — | 604 | Disposed |
| May 10, 2024 | DTM | Restricted Stock Units | Common Stock (1,758) | — | — | 1,758 | Acquired |
| Aug. 2, 2023 | DTM | Restricted Stock Units | Common Stock (604) | — | — | 604 | Disposed |
| May 5, 2023 | DTM | Restricted Stock Units | Common Stock (2,451) | — | — | 2,451 | Acquired |
| May 5, 2023 | DTM | Restricted Stock Units | Common Stock (1,795) | — | — | 1,795 | Disposed |
| May 6, 2022 | DTM | Restricted Stock Units | Common Stock (1,795) | — | — | 1,795 | Acquired |
| Aug. 2, 2021 | DTM | Restricted Stock Units | Common Stock (2,417) | — | — | 2,417 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 6, 2021 | DTM | Common Stock | 0 | Direct |