Tara Nickerson

CIK 1564461 · View on SEC EDGAR ↗

Insider

First SEC filing: Dec. 21, 2012 · Latest: Dec. 21, 2012

On this page

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 22 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

22 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Sept. 28, 2017 PRTA S 12,776 $69.20 $884,099 2,000 Direct -86.46% Disposed -87.1% (price as of 2026-08-20)
Sept. 27, 2017 PRTA S 4,724 $69.05 $326,192 2,000 Direct -70.26% Disposed -87.0% (price as of 2026-08-20)
Sept. 25, 2017 PRTA S 3,783 $64.33 $243,360 2,000 Direct -65.42% Disposed -86.1% (price as of 2026-08-20)
Sept. 25, 2017 PRTA S 13,717 $63.39 $869,521 5,783 Direct -70.34% Disposed -85.9% (price as of 2026-08-20)
Dec. 9, 2015 PRTA S 600 $66.94 $40,164 2,000 Direct -23.08% Disposed -86.6% (price as of 2026-08-20)
Dec. 9, 2015 PRTA S 6,695 $66.40 $444,548 2,600 Direct -72.03% Disposed -86.5% (price as of 2026-08-20)
Dec. 9, 2015 PRTA S 2,705 $65.42 $176,961 9,295 Direct -22.54% Disposed -86.3% (price as of 2026-08-20)
Sept. 9, 2015 PRTA S 200 $57.32 $11,464 2,000 Direct -9.09% Disposed -84.4% (price as of 2026-08-20)
Sept. 9, 2015 PRTA S 4,000 $56.52 $226,080 2,200 Direct -64.52% Disposed -84.1% (price as of 2026-08-20)
Sept. 9, 2015 PRTA S 5,800 $55.69 $323,002 6,200 Direct -48.33% Disposed -83.9% (price as of 2026-08-20)
June 9, 2015 PRTA S 2,760 $45.17 $124,669 2,000 Direct -57.98% Disposed -80.2% (price as of 2026-08-20)
June 9, 2015 PRTA S 9,240 $44.19 $408,316 4,760 Direct -66.00% Disposed -79.7% (price as of 2026-08-20)
March 20, 2015 PRTA S 10b5-1 13,000 $39.99 $519,870 2,000 Direct -86.67% Disposed -77.6% (price as of 2026-08-20)
May 12, 2014 PRTA P 1,656 $21.00 $34,776 2,000 Direct +481.40% Acquired -57.3% (price as of 2026-08-20)

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
Feb. 21, 2018 PRTA Stock Option (right to buy) Ordinary Shares (45,000) $33.10 Feb. 21, 2028 45,000 Acquired
Sept. 28, 2017 PRTA Stock Option (right to buy) Ordinary Shares (12,776) $6.73 Jan. 29, 2023 12,776 Disposed
Sept. 27, 2017 PRTA Stock Option (right to buy) Ordinary Shares (4,724) $6.73 Jan. 29, 2023 4,724 Disposed
Sept. 25, 2017 PRTA Stock Option (right to buy) Ordinary Shares (17,500) $6.41 Jan. 29, 2023 17,500 Disposed
Feb. 22, 2017 PRTA Stock Option (right to buy) Ordinary Shares (45,000) $55.00 Feb. 22, 2027 45,000 Acquired
Feb. 24, 2016 PRTA Stock Option (right to buy) Ordinary Shares (35,000) $34.61 Feb. 24, 2026 35,000 Acquired
Dec. 9, 2015 PRTA Stock Option (right to buy) Ordinary Shares (10,000) $6.73 March 31, 2023 10,000 Disposed
Sept. 9, 2015 PRTA Stock Option (right to buy) Ordinary Shares (10,000) $6.41 Jan. 29, 2023 10,000 Disposed
June 9, 2015 PRTA Stock Option (right to buy) Ordinary Shares (12,000) $6.41 Jan. 29, 2023 12,000 Disposed
March 20, 2015 PRTA Stock Option (right to buy) Ordinary Shares (13,000) $6.41 Jan. 29, 2023 13,000 Disposed
March 11, 2015 PRTA Stock Option (right to buy) Ordinary Shares (37,500) $27.81 March 11, 2025 37,500 Acquired
Feb. 4, 2014 PRTA Stock Option (right to buy) Ordinary Shares (50,000) $29.81 Feb. 4, 2024 50,000 Acquired
April 1, 2013 PRTA Stock Option (right to buy) Ordinary Shares (46,000) $6.73 March 31, 2023 46,000 Acquired
Jan. 29, 2013 PRTA Stock Option (right to buy Ordinary Shares (54,000) — Jan. 29, 2023 54,000 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
Dec. 21, 2012 PRTA Ordinary Shares, par value $0.01 per share 265 Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

PRTA

Ph.D.Chief Business Officer
Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2017 $339,608 — — — $135,843 — $13,500 $2,101,981
2016 $317,750 — — — $131,866 — $11,925 $1,254,841
2015 $307,917 — — — $106,231 — $11,263 $1,121,617

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.