Wellington Biomedical Innovation Master Investors (Cayman) II L.P.
CIK 1903360 · View on SEC EDGAR ↗
Insider
First SEC filing: April 29, 2026 · Latest: April 29, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 9 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 1, 2026 | AVLN | C | 4,060,259 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| May 1, 2026 | AVLN | C | 20,482,289 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| May 1, 2026 | AVLN | C | 1,275,486 | — | — | 1,275,486 Direct | — | Acquired | (price as of 2026-08-21) |
| Oct. 15, 2024 | UPB | C | 852,940 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Oct. 15, 2024 | UPB | C | 894,733 | — | — | 894,733 Direct | — | Acquired | (price as of 2026-08-21) |
| Sept. 16, 2024 | MBX | C | 4,854,368 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Sept. 16, 2024 | MBX | C | 16,666,666 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| Sept. 16, 2024 | MBX | C | 403,787 | — | — | 1,790,122 Direct | +29.13% | Acquired | (price as of 2026-08-21) |
| Sept. 16, 2024 | MBX | C | 1,386,335 | — | — | 1,386,335 Direct | — | Acquired | (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 1, 2026 | AVLN | Series D Convertible Preferred Stock | Common Stock (211,013) | — | — | 4,060,259 | Disposed |
| May 1, 2026 | AVLN | Series C-1 Convertible Preferred Stock | Common Stock (1,064,473) | — | — | 20,482,289 | Disposed |
| Oct. 15, 2024 | UPB | Series B redeemable convertible preferred stock | Common Stock (894,733) | — | — | 852,940 | Disposed |
| Sept. 16, 2024 | MBX | Series C Preferred Stock | Common Stock (403,787) | — | — | 4,854,368 | Disposed |
| Sept. 16, 2024 | MBX | Series B Preferred Stock | Common Stock (1,386,335) | — | — | 16,666,666 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 29, 2026 | AVLN | Series C-1 Convertible Preferred Stock→ Common Stock (1,064,473) | 1,064,473 | Direct |
| April 29, 2026 | AVLN | Series D Convertible Preferred Stock→ Common Stock (211,013) | 211,013 | Direct |
| Oct. 10, 2024 | UPB | Series B redeemable convertible preferred stock→ Common Stock (894,733) | 894,733 | Direct |
| Sept. 12, 2024 | MBX | Series B Preferred Stock→ Common Stock (1,386,335) | 1,386,335 | Direct |
| Sept. 12, 2024 | MBX | Series C Preferred Stock→ Common Stock (403,787) | 403,787 | Direct |