Kathryn E Stein

CIK 1587382 · View on SEC EDGAR ↗

Insider

First SEC filing: Oct. 9, 2013 · Latest: Oct. 9, 2013

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 25 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

25 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Dec. 22, 2014 MGNX S 10b5-1 10,946 $37.00 $405,002 43,205 Direct -20.21% Disposed -88.7% (price as of 2026-08-19)
Dec. 18, 2014 MGNX S 10b5-1 10,946 $33.00 $361,218 43,205 Direct -20.21% Disposed -87.3% (price as of 2026-08-19)
Nov. 21, 2014 MGNX S 10b5-1 10,946 $27.00 $295,542 43,205 Direct -20.21% Disposed -84.5% (price as of 2026-08-19)
Nov. 17, 2014 MGNX S 10b5-1 2,090 $22.95 $47,966 43,205 Direct -4.61% Disposed -81.8% (price as of 2026-08-19)
Nov. 14, 2014 MGNX S 10b5-1 23,211 $23.33 $541,513 43,205 Direct -34.95% Disposed -82.1% (price as of 2026-08-19)
May 29, 2014 MGNX S 10,946 $19.75 $216,184 43,205 Direct -20.21% Disposed -78.9% (price as of 2026-08-19)

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
Jan. 7, 2016 MGNX Employee Stock Option (right to buy) Common Stock (19,060) $0.71 March 23, 2016 19,060 Disposed
Jan. 7, 2016 MGNX Employee Stock Option (right to buy( Common Stock (13,316) $0.94 Jan. 5, 2018 13,316 Disposed
Jan. 7, 2016 MGNX Employee Stock Option (right to buy) Common Stock (4,421) $0.94 Jan. 10, 2019 4,421 Disposed
Jan. 7, 2016 MGNX Employee Stock Option (right to buy) Common Stock (8,895) $0.94 Jan. 10, 2019 8,895 Disposed
Jan. 7, 2016 MGNX Employee Stock Option (right to buy) Common Stock (6,658) $0.94 Jan. 9, 2020 6,658 Disposed
Dec. 23, 2014 MGNX Employee Stock Option (right to buy) Common Stock (10,946) $0.71 March 23, 2016 10,946 Disposed
Dec. 18, 2014 MGNX Employee Stock Option (right to buy) Common Stock (10,946) $0.71 March 23, 2016 10,946 Disposed
Dec. 12, 2014 MGNX Employee Stock Option (right to buy) Common Stock (10,000) $29.68 Dec. 12, 2024 10,000 Acquired
Nov. 21, 2014 MGNX Stock Option (right to buy) Common Stock (10,946) $0.71 March 23, 2016 10,946 Disposed
Nov. 17, 2014 MGNX Stock Option (right to buy) Common Stock (2,090) $0.94 Jan. 6, 2017 2,090 Disposed
Nov. 14, 2014 MGNX Stock Option (right to buy) Common Stock (23,211) $0.94 Jan. 6, 2017 23,211 Disposed
May 29, 2014 MGNX Stock Option (right to buy) Common Stock (293) $0.71 March 24, 2015 293 Disposed
May 29, 2014 MGNX Stock Option (right to buy) Common Stock (10,653) $0.71 Dec. 15, 2015 10,653 Disposed
Oct. 9, 2013 MGNX Stock Option (right to buy) Common Stock (10,653) $16.00 Oct. 9, 2023 10,653 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 11 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
Oct. 9, 2013 MGNX Common Stock 43,205 Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct
Oct. 9, 2013 MGNX Stock Option (right to buy)→ Common Stock — Direct