David Arkowitz
CIK 1296999 · View on SEC EDGAR ↗
First SEC filing: June 1, 2021 · Latest: June 1, 2021
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
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 |
|---|---|---|---|---|---|---|---|---|---|
| Jan. 10, 2025 | IBIO | P | 18,382 | $2.72 | $49,999 | 18,382 Direct | — | Acquired | -46.7% (price as of 2026-08-19) |
| Feb. 16, 2024 | MCRB | S 10b5-1 | 3,939 | $1.08 | $4,254 | 182,442 Direct | -2.11% | Disposed | -78.8% (price as of 2026-08-19) |
| Oct. 30, 2023 | MCRB | S 10b5-1 | 4,066 | $1.35 | $5,489 | 175,756 Direct | -2.26% | Disposed | -83.0% (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| Nov. 20, 2025 | IBIO | Stock Option (right to buy) [F1] | Common Stock (13,500) | $1.00 | Nov. 19, 2035 | 13,500 | Acquired |
| Nov. 21, 2024 | IBIO | Stock Option (right to buy) [F1] | Common Stock (12,600) | $2.45 | Nov. 20, 2034 | 12,600 | Acquired |
| Feb. 15, 2024 | MCRB | Restricted Stock Units | Common Stock (10,625) | — | — | 10,625 | Disposed |
| Feb. 14, 2024 | MCRB | Restricted Stock Units | Common Stock (35,625) | — | — | 35,625 | Acquired |
| Feb. 14, 2024 | MCRB | Stock Option (Right to Buy) | Common Stock (287,905) | $1.10 | Feb. 13, 2034 | 287,905 | Acquired |
| Feb. 14, 2024 | MCRB | Stock Option (Right to Buy) | Common Stock (213,750) | $1.10 | Feb. 13, 2034 | 213,750 | Acquired |
| Oct. 27, 2023 | MCRB | Restricted Stock Units | Common Stock (13,209) | — | — | 13,209 | Disposed |
| April 27, 2023 | MCRB | Restricted Stock Units | Common Stock (26,418) | — | — | 26,418 | Acquired |
| Feb. 3, 2023 | MCRB | Stock Option (Right to Buy) | Common Stock (85,000) | $5.50 | Feb. 2, 2033 | 85,000 | Acquired |
| Feb. 3, 2023 | MCRB | Restricted Stock Units | Common Stock (42,500) | — | — | 42,500 | Acquired |
| June 15, 2022 | MCRB | Restricted Stock Units | Common Stock (5,000) | — | — | 5,000 | Disposed |
| Feb. 4, 2022 | MCRB | Stock Option (Right to Buy) | Common Stock (190,000) | $7.38 | Feb. 3, 2032 | 190,000 | Acquired |
| June 1, 2021 | MCRB | Restricted Stock Units | Common Stock (5,000) | — | — | 5,000 | Acquired |
| June 1, 2021 | MCRB | Stock Options (right to buy) | Common Stock (270,000) | $20.19 | May 31, 2031 | 270,000 | 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 |
|---|---|---|---|---|
| June 1, 2021 | MCRB | Common Stock | 2,000 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2022 | $470,900 | — | — | — | $190,000 | — | $9,120 | $1,786,650 |
| 2021 | $265,417 | $50,000 | $916,100 | $3,896,775 | $93,994 | — | $4,409 | $5,226,695 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.