Brian Jg Pereira
CIK 1298146 · View on SEC EDGAR ↗
Insider
First SEC filing: June 11, 2026 · Latest: June 11, 2026
On this page
Insider at
Insider transactions
0 buys (P)
10 sells (S)
Net:
$-2,951,047
+ 31 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
31 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 20, 2026 | PROK | S | 222,948 | $1.42 | $316,586 | 0 Indirect | -100.00% | Disposed | 5.3% (price as of 2026-08-21) |
| Aug. 20, 2026 | PROK | S | 27,052 | $1.42 | $38,414 | 0 Direct | -100.00% | Disposed | 5.3% (price as of 2026-08-21) |
| Aug. 19, 2026 | PROK | S | 222,949 | $1.44 | $321,047 | 222,948 Indirect | -50.00% | Disposed | 3.8% (price as of 2026-08-21) |
| Aug. 19, 2026 | PROK | S | 27,051 | $1.44 | $38,953 | 27,052 Direct | -50.00% | Disposed | 3.8% (price as of 2026-08-21) |
| Aug. 18, 2026 | PROK | S | 229,338 | $1.37 | $314,193 | 445,897 Indirect | -33.96% | Disposed | 9.1% (price as of 2026-08-21) |
| Aug. 18, 2026 | PROK | S | 27,826 | $1.37 | $38,122 | 54,103 Direct | -33.96% | Disposed | 9.1% (price as of 2026-08-21) |
| Nov. 13, 2025 | PROK | S | 54,333 | $2.37 | $128,769 | 0 Indirect | -100.00% | Disposed | -36.9% (price as of 2026-08-21) |
| Nov. 13, 2025 | PROK | S | 447,803 | $2.37 | $1,061,293 | 0 Indirect | -100.00% | Disposed | -36.9% (price as of 2026-08-21) |
| Nov. 12, 2025 | PROK | S | 27,595 | $2.72 | $75,058 | 54,333 Indirect | -33.68% | Disposed | -45.0% (price as of 2026-08-21) |
| Nov. 12, 2025 | PROK | S | 227,431 | $2.72 | $618,612 | 447,803 Indirect | -33.68% | Disposed | -45.0% (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 |
|---|---|---|---|---|---|---|---|
| Aug. 4, 2026 | PROK | Class B Common Stock [F1] | Class A Common Stock (81,929) | $0.00 | — | 81,929 | Disposed |
| Aug. 4, 2026 | PROK | Common Units in ProKidney Holdings, LLC | Class A Common Stock (81,929) | $0.00 | — | 81,929 | Disposed |
| Aug. 4, 2026 | PROK | Class B Common Stock [F1] | Class A Common Stock (675,235) | $0.00 | — | 675,235 | Disposed |
| Aug. 4, 2026 | PROK | Common Units in ProKidney Holdings, LLC | Class A Common Stock (675,235) | $0.00 | — | 675,235 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (30,000) | $12.05 | Sept. 30, 2035 | 30,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (10,000) | $11.54 | Oct. 2, 2034 | 10,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (10,000) | $10.08 | Sept. 25, 2033 | 10,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (10,000) | $4.53 | Oct. 12, 2032 | 10,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (10,000) | $17.45 | Sept. 29, 2031 | 10,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (7,000) | $12.88 | Sept. 30, 2030 | 7,000 | Disposed |
| June 11, 2026 | KALV | Stock Option (Right to Buy) | Common Stock (14,000) | $17.95 | Jan. 31, 2029 | 14,000 | Disposed |
| May 28, 2026 | PROK | Director stock option (right to buy) | Class A Common Stock (135,000) | $1.81 | May 28, 2036 | 135,000 | Acquired |
| Oct. 1, 2025 | KALV | Stock Option (right to buy) | Common Stock (30,000) | $12.05 | Sept. 30, 2035 | 30,000 | Acquired |
| May 29, 2025 | PROK | Director stock option (right to buy) | Class A Ordinary Shares (125,862) | $0.72 | May 29, 2035 | 125,862 | Acquired |
| Feb. 4, 2025 | PROK | Common Units in ProKidney LP | Class A Ordinary Shares (675,234) | $0.00 | — | 675,234 | Disposed |
| Feb. 4, 2025 | PROK | Class B Ordinary Shares [F1] | Class A Ordinary Shares (675,234) | $0.00 | — | 675,234 | Disposed |
| Feb. 4, 2025 | PROK | Common Units in ProKidney LP | Class A Ordinary Shares (81,928) | $0.00 | — | 81,928 | Disposed |
| Feb. 4, 2025 | PROK | Class B Ordinary Shares [F1] | Class A Ordinary Shares (81,928) | $0.00 | — | 81,928 | Disposed |
| Oct. 3, 2024 | KALV | Stock Option (Right to Buy) | Common Stock (10,000) | $11.54 | Oct. 2, 2034 | 10,000 | Acquired |
| May 30, 2024 | PROK | Director stock option (right to buy) | Class A Ordinary Shares (62,558) | $4.20 | May 30, 2034 | 62,558 | Acquired |
| Sept. 26, 2023 | KALV | Stock Option (right to buy) | Common Stock (10,000) | $10.08 | Sept. 25, 2033 | 10,000 | Acquired |
| June 29, 2023 | PROK | Director stock option (right to buy) | Class A Ordinary Shares (48,128) | $10.56 | June 29, 2033 | 48,128 | Acquired |
| Oct. 13, 2022 | KALV | Employee Stock Option (right to buy) | Common Stock (10,000) | $4.53 | Oct. 12, 2032 | 10,000 | Acquired |
| July 11, 2022 | PROK | Common Units in ProKidney LP [F3] | Class A Ordinary Shares (1,514,326) | — | — | 1,514,326 | Acquired |
| July 11, 2022 | PROK | Class B Ordinary Shares | Class A Ordinary Shares (1,514,326) | — | — | 1,514,326 | Acquired |
| Sept. 30, 2021 | KALV | Director Stock Option (Right to Buy) | Common Stock (10,000) | $17.45 | Sept. 29, 2031 | 10,000 | Acquired |
| Oct. 1, 2020 | KALV | Director Stock Option (right to buy) | Common Stock (7,000) | $12.88 | Sept. 30, 2030 | 7,000 | 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.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 13, 2022 | PROK | No securities owned. | 0 | Direct |
| Feb. 5, 2019 | KALV | No Securities are beneficially owned | 0 | Direct |