Karin L Walker
CIK 1559422 · View on SEC EDGAR ↗
Insider
First SEC filing: March 1, 2019 · Latest: March 1, 2019
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 64 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
64 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Jan. 24, 2024 | PRTA | S 10b5-1 | 5,000 | $34.00 | $170,000 | 0 Direct | -100.00% | Disposed | -73.6% (price as of 2026-08-20) |
| Dec. 20, 2023 | PRTA | S 10b5-1 | 3,322 | $37.45 | $124,409 | 0 Direct | -100.00% | Disposed | -76.1% (price as of 2026-08-20) |
| Dec. 20, 2023 | PRTA | S 10b5-1 | 1,678 | $36.68 | $61,549 | 3,322 Direct | -33.56% | Disposed | -75.6% (price as of 2026-08-20) |
| Nov. 30, 2023 | PRTA | S 10b5-1 | 5,000 | $34.00 | $170,000 | 0 Direct | -100.00% | Disposed | -73.6% (price as of 2026-08-20) |
| Oct. 25, 2023 | PRTA | S 10b5-1 | 294 | $42.28 | $12,430 | 0 Direct | -100.00% | Disposed | -78.8% (price as of 2026-08-20) |
| Oct. 25, 2023 | PRTA | S 10b5-1 | 2,917 | $41.38 | $120,705 | 294 Direct | -90.84% | Disposed | -78.3% (price as of 2026-08-20) |
| Oct. 25, 2023 | PRTA | S 10b5-1 | 1,789 | $40.27 | $72,043 | 3,211 Direct | -35.78% | Disposed | -77.8% (price as of 2026-08-20) |
| Sept. 19, 2023 | PRTA | S 10b5-1 | 5,000 | $52.36 | $261,800 | 0 Direct | -100.00% | Disposed | -82.9% (price as of 2026-08-20) |
| Aug. 18, 2023 | PRTA | S 10b5-1 | 5,000 | $57.18 | $285,900 | 0 Direct | -100.00% | Disposed | -84.3% (price as of 2026-08-20) |
| July 19, 2023 | PRTA | S 10b5-1 | 1,034 | $70.08 | $72,463 | 0 Direct | -100.00% | Disposed | -87.2% (price as of 2026-08-20) |
| July 19, 2023 | PRTA | S 10b5-1 | 3,966 | $68.96 | $273,495 | 1,034 Direct | -79.32% | Disposed | -87.0% (price as of 2026-08-20) |
| June 20, 2023 | PRTA | S 10b5-1 | 529 | $69.99 | $37,025 | 0 Direct | -100.00% | Disposed | -87.2% (price as of 2026-08-20) |
| June 20, 2023 | PRTA | S 10b5-1 | 2,471 | $69.49 | $171,710 | 529 Direct | -82.37% | Disposed | -87.1% (price as of 2026-08-20) |
| June 20, 2023 | PRTA | S 10b5-1 | 2,000 | $67.88 | $135,760 | 3,000 Direct | -40.00% | Disposed | -86.8% (price as of 2026-08-20) |
| May 19, 2023 | PRTA | S 10b5-1 | 2,177 | $74.47 | $162,121 | 0 Direct | -100.00% | Disposed | -88.0% (price as of 2026-08-20) |
| May 19, 2023 | PRTA | S 10b5-1 | 2,823 | $73.63 | $207,857 | 2,177 Direct | -56.46% | Disposed | -87.8% (price as of 2026-08-20) |
| April 19, 2023 | PRTA | S 10b5-1 | 2,083 | $53.25 | $110,920 | 0 Direct | -100.00% | Disposed | -83.2% (price as of 2026-08-20) |
| April 19, 2023 | PRTA | S 10b5-1 | 2,917 | $52.64 | $153,551 | 2,083 Direct | -58.34% | Disposed | -83.0% (price as of 2026-08-20) |
| March 20, 2023 | PRTA | S 10b5-1 | 1,097 | $48.47 | $53,172 | 0 Direct | -100.00% | Disposed | -81.5% (price as of 2026-08-20) |
| March 20, 2023 | PRTA | S 10b5-1 | 3,903 | $47.51 | $185,432 | 1,097 Direct | -78.06% | Disposed | -81.1% (price as of 2026-08-20) |
| Sept. 28, 2017 | PRTA | S | 1,500 | $70.00 | $105,000 | 0 Direct | -100.00% | Disposed | -87.2% (price as of 2026-08-20) |
| July 17, 2017 | PRTA | S | 3,600 | $65.21 | $234,756 | 0 Direct | -100.00% | Disposed | -86.3% (price as of 2026-08-20) |
| July 17, 2017 | PRTA | S | 1,400 | $64.06 | $89,684 | 3,600 Direct | -28.00% | Disposed | -86.0% (price as of 2026-08-20) |
| April 17, 2017 | PRTA | S | 2,000 | $52.29 | $104,580 | 0 Direct | -100.00% | Disposed | -82.9% (price as of 2026-08-20) |
| April 17, 2017 | PRTA | S | 100 | $52.70 | $5,270 | 0 Direct | -100.00% | Disposed | -83.0% (price as of 2026-08-20) |
| April 17, 2017 | PRTA | S | 2,900 | $52.21 | $151,409 | 100 Direct | -96.67% | Disposed | -82.8% (price as of 2026-08-20) |
| Oct. 13, 2016 | PRTA | S | 900 | $54.71 | $49,239 | 0 Direct | -100.00% | Disposed | -83.6% (price as of 2026-08-20) |
| Oct. 13, 2016 | PRTA | S | 1,100 | $53.61 | $58,971 | 900 Direct | -55.00% | Disposed | -83.3% (price as of 2026-08-20) |
| Oct. 13, 2016 | PRTA | S | 1,800 | $54.74 | $98,532 | 0 Direct | -100.00% | Disposed | -83.6% (price as of 2026-08-20) |
| Oct. 13, 2016 | PRTA | S | 1,200 | $53.70 | $64,440 | 1,800 Direct | -40.00% | Disposed | -83.3% (price as of 2026-08-20) |
| Sept. 19, 2016 | PRTA | S | 4,500 | $61.83 | $278,235 | 0 Direct | -100.00% | Disposed | -85.5% (price as of 2026-08-20) |
| Sept. 19, 2016 | PRTA | S | 500 | $60.01 | $30,005 | 4,500 Direct | -10.00% | Disposed | -85.1% (price as of 2026-08-20) |
| Sept. 19, 2016 | PRTA | S | 2,700 | $61.83 | $166,941 | 0 Direct | -100.00% | Disposed | -85.5% (price as of 2026-08-20) |
| Sept. 19, 2016 | PRTA | S | 4,300 | $60.00 | $258,000 | 2,700 Direct | -61.43% | Disposed | -85.1% (price as of 2026-08-20) |
| April 13, 2016 | PRTA | S | 1,000 | $45.29 | $45,290 | 0 Direct | -100.00% | Disposed | -80.2% (price as of 2026-08-20) |
| April 13, 2016 | PRTA | S | 1,000 | $45.28 | $45,280 | 0 Direct | -100.00% | Disposed | -80.2% (price as of 2026-08-20) |
Showing latest 100 of 143 transactions
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 |
|---|---|---|---|---|---|---|---|
| July 28, 2026 | PRTA | Restricted Stock Units [F2] | Ordinary Shares (15,000) | — | — | 15,000 | Disposed |
| March 3, 2026 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (150,000) | $9.36 | March 3, 2036 | 150,000 | Acquired |
| March 5, 2025 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (70,000) | $14.95 | March 5, 2035 | 70,000 | Acquired |
| Feb. 27, 2024 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (54,000) | $30.30 | Feb. 27, 2034 | 54,000 | Acquired |
| Jan. 24, 2024 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $13.53 | Feb. 27, 2029 | 5,000 | Disposed |
| Dec. 20, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $13.53 | Feb. 27, 2029 | 5,000 | Disposed |
| Nov. 30, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $13.53 | Feb. 27, 2029 | 5,000 | Disposed |
| Oct. 25, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $13.53 | Feb. 27, 2029 | 5,000 | Disposed |
| Sept. 19, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| Aug. 18, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| July 19, 2023 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| June 30, 2023 | BGMS | Stock Option (right to buy) | Common Stock (42,438) | $0.59 | June 30, 2033 | 42,438 | Acquired |
| June 20, 2023 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| May 19, 2023 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| April 19, 2023 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| March 20, 2023 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $15.04 | June 21, 2028 | 5,000 | Disposed |
| March 2, 2023 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (38,000) | $52.97 | March 2, 2033 | 38,000 | Acquired |
| June 14, 2022 | BGMS | Stock Option (right to buy) | Common stock (31,645) | $1.11 | June 14, 2032 | 31,645 | Acquired |
| Feb. 23, 2022 | PRTA | Stock Option (Right to Buy) | Ordinary Shares (45,500) | $32.45 | Feb. 23, 2032 | 45,500 | Acquired |
| June 15, 2021 | BGMS | Stock Option (right to buy) | Common Stock (2,374) | $6.69 | June 15, 2031 | 2,374 | Acquired |
| June 15, 2021 | BGMS | Stock Option (right to buy) | Common Stock (4,748) | $6.69 | June 15, 2031 | 4,748 | Acquired |
| Nov. 9, 2020 | BGMS | Stock Option (right to buy) [F1] | Common Stock (5,200) | $3.33 | Nov. 9, 2030 | 5,200 | Acquired |
| Feb. 27, 2019 | PRTA | Stock Option (right to buy) | Ordinary Shares (35,000) | $13.53 | Feb. 27, 2029 | 35,000 | Acquired |
| June 21, 2018 | PRTA | Stock Option (right to buy) | Ordinary Shares (110,000) | $15.04 | June 21, 2028 | 110,000 | Acquired |
| Feb. 21, 2018 | PRTA | Stock Option (right to buy) | Ordinary Shares (25,000) | $33.10 | Feb. 21, 2028 | 25,000 | Acquired |
| Sept. 28, 2017 | PRTA | Stock Option(right to buy) | Ordinary Shares (1,500) | $27.81 | March 11, 2025 | 1,500 | Disposed |
| July 17, 2017 | PRTA | Stock Option(right to buy) | Ordinary Shares (5,000) | $9.75 | June 2, 2023 | 5,000 | Disposed |
| April 17, 2017 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $29.81 | Feb. 4, 2024 | 2,000 | Disposed |
| April 17, 2017 | PRTA | Stock Option (right to buy) | Ordinary Shares (3,000) | $9.75 | June 2, 2023 | 3,000 | Disposed |
| Feb. 22, 2017 | PRTA | Stock Option (right to buy) | Ordinary Shares (30,000) | $55.00 | Feb. 22, 2027 | 30,000 | Acquired |
| Oct. 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $29.81 | Feb. 4, 2024 | 2,000 | Disposed |
| Oct. 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (3,000) | $9.75 | June 2, 2023 | 3,000 | Disposed |
| Sept. 19, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $27.81 | March 11, 2025 | 5,000 | Disposed |
| Sept. 19, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (7,000) | $9.75 | June 2, 2023 | 7,000 | Disposed |
| April 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (1,000) | $27.81 | March 11, 2025 | 1,000 | Disposed |
| April 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (1,000) | $29.81 | Feb. 4, 2024 | 1,000 | Disposed |
| April 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $9.75 | June 2, 2023 | 2,000 | Disposed |
| Feb. 24, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (25,000) | $34.61 | Feb. 24, 2026 | 25,000 | Acquired |
| Jan. 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $29.81 | Feb. 4, 2024 | 2,000 | Disposed |
| Jan. 13, 2016 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $9.75 | June 2, 2023 | 2,000 | Disposed |
| Aug. 12, 2015 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,000) | $29.81 | Feb. 4, 2024 | 2,000 | Disposed |
| Aug. 12, 2015 | PRTA | Stock Option (right to buy) | Ordinary Shares (5,000) | $9.75 | June 2, 2023 | 5,000 | Disposed |
| March 11, 2015 | PRTA | Stock Option (right to buy) | Ordinary Shares (25,000) | $27.81 | March 11, 2025 | 25,000 | Acquired |
| Feb. 10, 2015 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,500) | $9.75 | June 2, 2023 | 2,500 | Disposed |
| Dec. 9, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,500) | $9.75 | June 2, 2023 | 2,500 | Disposed |
| Oct. 16, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,500) | $9.75 | June 2, 2023 | 2,500 | Disposed |
| Oct. 16, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,500) | $9.75 | June 2, 2023 | 2,500 | Disposed |
| Aug. 12, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (2,500) | $9.75 | June 2, 2023 | 2,500 | Disposed |
| June 6, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (8,000) | $9.75 | June 2, 2023 | 8,000 | Disposed |
| Feb. 4, 2014 | PRTA | Stock Option (right to buy) | Ordinary Shares (12,000) | $29.81 | Feb. 4, 2024 | 12,000 | Acquired |
| June 3, 2013 | PRTA | Stock Option (right to buy) | Ordinary Shares (45,000) | $9.75 | June 2, 2023 | 45,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).