David Arkowitz
Insider
First SEC filing: June 1, 2021 · Latest: June 1, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 20, 2025 | IBIO | A | 13,500 | · | · | 13,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 10, 2025 | IBIO | P | 18,382 | $2.72 | $49,999 | 18,382 Direct | · | Acquired | -58.6% (price as of 2026-10-02) |
| Nov. 21, 2024 | IBIO | A | 12,600 | · | · | 12,600 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 16, 2024 | MCRB | S 10b5-1 | 3,939 | $1.08 | $4,254 | 182,442 Direct | -2.11% | Disposed | -86.4% (price as of 2026-10-02) |
| Feb. 15, 2024 | MCRB | M | 10,625 | · | · | 31,875 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| Feb. 15, 2024 | MCRB | M | 10,625 | · | · | 186,381 Direct | +6.05% | Acquired | (price as of 2026-10-02) |
| Feb. 14, 2024 | MCRB | A | 35,625 | · | · | 35,625 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 14, 2024 | MCRB | A | 287,905 | · | · | 287,905 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 14, 2024 | MCRB | A | 213,750 | · | · | 213,750 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 30, 2023 | MCRB | S 10b5-1 | 4,066 | $1.35 | $5,489 | 175,756 Direct | -2.26% | Disposed | -89.1% (price as of 2026-10-02) |
| Oct. 27, 2023 | MCRB | M | 13,209 | · | · | 13,209 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Oct. 27, 2023 | MCRB | M | 13,209 | · | · | 179,822 Direct | +7.93% | Acquired | (price as of 2026-10-02) |
| April 27, 2023 | MCRB | A | 26,418 | · | · | 26,418 Direct | · | Acquired | (price as of 2026-10-02) |
| April 27, 2023 | MCRB | A | 42,500 | · | · | 166,613 Direct | +34.24% | Acquired | (price as of 2026-10-02) |
| Feb. 3, 2023 | MCRB | A | 85,000 | · | · | 85,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 3, 2023 | MCRB | A | 42,500 | · | · | 42,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 27, 2022 | MCRB | A | 42,500 | · | · | 112,992 Direct | +60.29% | Acquired | (price as of 2026-10-02) |
| July 5, 2022 | MCRB | A | 63,492 | $3.15 | $200,000 | 65,492 Direct | +3174.60% | Acquired | -95.3% (price as of 2026-10-02) |
| June 15, 2022 | MCRB | M | 5,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 15, 2022 | MCRB | M | 5,000 | · | · | 70,492 Direct | +7.63% | Acquired | (price as of 2026-10-02) |
| Feb. 4, 2022 | MCRB | A | 190,000 | · | · | 190,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2021 | MCRB | A | 5,000 | · | · | 5,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2021 | MCRB | A | 270,000 | · | · | 270,000 Direct | · | Acquired | (price as of 2026-10-02) |
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 | $1.00 | Nov. 19, 2035 | 13,500 | Acquired |
| Nov. 21, 2024 | IBIO | Stock Option (right to buy) [F1] | Common Stock | $2.45 | Nov. 20, 2034 | 12,600 | Acquired |
| Feb. 15, 2024 | MCRB | Restricted Stock Units | Common Stock | · | · | 10,625 | Disposed |
| Feb. 14, 2024 | MCRB | Restricted Stock Units | Common Stock | · | · | 35,625 | Acquired |
| Feb. 14, 2024 | MCRB | Stock Option (Right to Buy) | Common Stock | $1.10 | Feb. 13, 2034 | 287,905 | Acquired |
| Feb. 14, 2024 | MCRB | Stock Option (Right to Buy) | Common Stock | $1.10 | Feb. 13, 2034 | 213,750 | Acquired |
| Oct. 27, 2023 | MCRB | Restricted Stock Units | Common Stock | · | · | 13,209 | Disposed |
| April 27, 2023 | MCRB | Restricted Stock Units | Common Stock | · | · | 26,418 | Acquired |
| Feb. 3, 2023 | MCRB | Stock Option (Right to Buy) | Common Stock | $5.50 | Feb. 2, 2033 | 85,000 | Acquired |
| Feb. 3, 2023 | MCRB | Restricted Stock Units | Common Stock | · | · | 42,500 | Acquired |
| June 15, 2022 | MCRB | Restricted Stock Units | Common Stock | · | · | 5,000 | Disposed |
| Feb. 4, 2022 | MCRB | Stock Option (Right to Buy) | Common Stock | $7.38 | Feb. 3, 2032 | 190,000 | Acquired |
| June 1, 2021 | MCRB | Restricted Stock Units | Common Stock | · | · | 5,000 | Acquired |
| June 1, 2021 | MCRB | Stock Options (right to buy) | Common Stock | $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.