Seth Loring Harrison

CIK 1404955 · View on SEC EDGAR ↗

Insider

First SEC filing: June 5, 2026 · Latest: June 5, 2026

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 30 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

30 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Nov. 24, 2020 STOK P 375,000 $39.00 $14,625,000 17,161,713 Indirect +2.23% Acquired -14.9% (price as of 2026-08-19)
Sept. 22, 2014 ELDN P 362,500 $15.00 $5,437,500 7,912,079 Indirect +4.80% Acquired -99.8% (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
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (17,786) $29.46 June 2, 2036 17,786 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (17,786) $29.46 June 2, 2036 17,786 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (29,747) $10.90 June 2, 2035 29,747 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (29,747) $10.90 June 2, 2035 29,747 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (7,639) $16.41 June 4, 2034 7,639 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (7,639) $16.41 June 4, 2034 7,639 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (19,441) $12.46 June 12, 2033 19,441 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (19,441) $12.46 June 12, 2033 19,441 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (21,000) $12.96 June 6, 2032 21,000 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (21,000) $12.96 June 6, 2032 21,000 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (11,650) $40.37 June 7, 2031 11,650 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (11,650) $40.37 June 7, 2031 11,650 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (14,777) $26.53 June 2, 2030 14,777 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (14,777) $26.53 June 2, 2030 14,777 Disposed
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (29,555) $28.80 Sept. 9, 2029 29,555 Acquired
July 16, 2026 STOK Stock Option (Right to Buy) Common Stock (29,555) $28.80 Sept. 9, 2029 29,555 Disposed
June 3, 2026 STOK Director Stock Option (Right to Buy) Common Stock (17,786) $29.46 June 2, 2036 17,786 Acquired
June 13, 2023 STOK Director Stock Option (Right to Buy) Common Stock (19,441) $12.46 June 12, 2033 19,441 Acquired
June 7, 2022 STOK Director Stock Option (Right to Buy) Common Stock (21,000) $12.96 June 6, 2032 21,000 Acquired
June 8, 2021 STOK Director Stock Option (Right to Buy) Common Stock (11,650) $40.37 June 7, 2031 11,650 Acquired
June 3, 2020 STOK Director Stock Option (Right to Buy) Common Stock (14,777) $26.53 June 2, 2030 14,777 Acquired
Sept. 22, 2014 ELDN Series E Preferred Stock Common Stock (2,311,300) — — 24,199,308 Disposed
Sept. 22, 2014 ELDN Series D-3 Preferred Stock Common Stock (2,296,661) — — 24,046,035 Disposed
Sept. 22, 2014 ELDN Series D-2 Preferred Stock Common Stock (147,053) — — 1,539,643 Disposed
Sept. 22, 2014 ELDN Series D-1 Preferred Stock Common Stock (832,028) — — 8,711,335 Disposed
Sept. 22, 2014 ELDN Series C Preferred Stock Common Stock (1,394,921) — — 14,604,833 Disposed
Sept. 22, 2014 ELDN Series B-2 Preferred Stock Common Stock (61,584) — — 644,786 Disposed
Sept. 22, 2014 ELDN Series B-1 Preferred Stock Common Stock (76,224) — — 798,067 Disposed
Sept. 22, 2014 ELDN Series A Preferred Stock Common Stock (429,799) — — 4,500,000 Disposed

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

Initial ownership (Form 3) 13 holdings

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

Date Ticker Security Shares Ownership
June 18, 2019 STOK Series A Convertible Preferred Stock→ Common Stock (4,980,168) 4,980,168 Direct
June 18, 2019 STOK Series A-2 Convertible Preferred Stock→ Common Stock (7,617,746) 7,617,746 Direct
June 18, 2019 STOK Series B Convertible Preferred Stock→ Common Stock (2,799,910) 2,799,910 Direct
Sept. 16, 2014 ELDN Common Stock 212,694 Direct
Sept. 16, 2014 ELDN Common Stock 9 Indirect
Sept. 16, 2014 ELDN Series A Preferred Stock→ Common Stock (429,799) 429,799 Indirect
Sept. 16, 2014 ELDN Series B-1 Preferred Stock→ Common Stock (76,224) 76,224 Indirect
Sept. 16, 2014 ELDN Series B-2 Preferred Stock→ Common Stock (61,584) 61,584 Indirect
Sept. 16, 2014 ELDN Series C Preferred Stock→ Common Stock (1,394,921) 1,394,921 Indirect
Sept. 16, 2014 ELDN Series D-1 Preferred Stock→ Common Stock (832,028) 832,028 Indirect
Sept. 16, 2014 ELDN Series D-2 Preferred Stock→ Common Stock (147,053) 147,053 Indirect
Sept. 16, 2014 ELDN Series D-3 Preferred Stock→ Common Stock (2,296,661) 2,296,661 Indirect
Sept. 16, 2014 ELDN Series E Preferred Stock→ Common Stock (2,311,300) 2,311,300 Indirect