Beth C Seidenberg

CIK 1184592 · View on SEC EDGAR ↗

Insider

First SEC filing: May 23, 2008 · Latest: May 23, 2008

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Insider at

Insider transactions

1 buys (P) 0 sells (S) Net: $999,998 + 78 non-open-market transactions below Avg return of open purchases vs now: 14.4% 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

78 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Dec. 18, 2025 KYTX P 133,333 $7.50 $999,998 869,317 Indirect +18.12% Acquired 14.4% (price as of 2026-08-20)
July 18, 2023 SGMT P 46,875 $16.00 $750,000 46,875 Indirect — Acquired -34.3% (price as of 2026-08-20)
March 30, 2023 VERA P 2,300 $7.24 $16,652 1,949,295 Indirect +0.12% Acquired 336.0% (price as of 2026-08-20)
March 28, 2023 VERA P 23,908 $7.24 $173,094 1,946,995 Indirect +1.24% Acquired 336.0% (price as of 2026-08-20)
March 27, 2023 VERA P 1,633 $7.24 $11,823 1,923,087 Indirect +0.08% Acquired 336.0% (price as of 2026-08-20)
March 24, 2023 VERA P 1,833 $7.24 $13,271 1,921,454 Indirect +0.10% Acquired 336.0% (price as of 2026-08-20)
March 20, 2023 VERA P 15,252 $7.21 $109,967 1,919,621 Indirect +0.80% Acquired 337.9% (price as of 2026-08-20)
March 17, 2023 VERA P 74,045 $7.12 $527,200 1,904,369 Indirect +4.05% Acquired 343.4% (price as of 2026-08-20)
March 16, 2023 VERA P 60,097 $7.09 $426,088 1,830,324 Indirect +3.39% Acquired 345.3% (price as of 2026-08-20)
March 15, 2023 VERA P 32,844 $7.12 $233,849 1,770,227 Indirect +1.89% Acquired 343.4% (price as of 2026-08-20)
March 10, 2023 VERA P 48,003 $7.16 $343,701 1,737,383 Indirect +2.84% Acquired 340.9% (price as of 2026-08-20)
March 3, 2023 VERA P 1,000 $7.24 $7,240 1,689,380 Indirect +0.06% Acquired 336.0% (price as of 2026-08-20)
March 2, 2023 VERA P 23,378 $7.24 $169,257 1,688,380 Indirect +1.40% Acquired 336.0% (price as of 2026-08-20)
March 1, 2023 VERA P 100 $7.25 $725 1,665,002 Indirect +0.01% Acquired 335.4% (price as of 2026-08-20)
Feb. 23, 2023 VERA P 200 $7.24 $1,448 1,664,902 Indirect +0.01% Acquired 336.0% (price as of 2026-08-20)
Feb. 13, 2023 VERA P 10,072 $7.20 $72,518 1,664,702 Indirect +0.61% Acquired 338.5% (price as of 2026-08-20)
Feb. 9, 2023 VERA P 400 $7.25 $2,900 1,654,630 Indirect +0.02% Acquired 335.4% (price as of 2026-08-20)
Feb. 8, 2023 VERA P 45,357 $7.22 $327,478 1,654,230 Indirect +2.82% Acquired 337.3% (price as of 2026-08-20)
Feb. 7, 2023 VERA P 87,956 $7.08 $622,728 1,608,873 Indirect +5.78% Acquired 345.9% (price as of 2026-08-20)
Feb. 6, 2023 VERA P 131,602 $7.03 $925,162 1,520,917 Indirect +9.47% Acquired 349.1% (price as of 2026-08-20)
Feb. 3, 2023 VERA P 46,163 $7.24 $334,220 1,389,315 Indirect +3.44% Acquired 336.0% (price as of 2026-08-20)
April 15, 2021 PGNY S 9,799 $50.32 $493,086 8,805,015 Indirect -0.11% Disposed -47.3% (price as of 2026-08-20)

Showing latest 100 of 191 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
Aug. 10, 2026 LTGO Series Seed Convertible Stock Common Stock (938,979) — — 938,979 Disposed
Aug. 10, 2026 LTGO Series A Convertible Preferred Stock Common Stock (3,547,842) — — 3,547,842 Disposed
Aug. 10, 2026 LTGO Series A-2 Convertible Preferred Stock Common Stock (1,027,635) — — 1,027,635 Disposed
Aug. 10, 2026 LTGO Series A-2 Convertible Preferred Stock Common Stock (3,464,072) — — 3,464,072 Disposed
Aug. 10, 2026 LTGO Series B Convertible Preferred Stock Common Stock (1,484,401) — — 1,484,401 Disposed
Aug. 10, 2026 LTGO Series A-2 Convertible Preferred Stock Common Stock (2,066,857) — — 2,066,857 Disposed
Aug. 10, 2026 LTGO Convertible Promissory Note Common Stock (165,519) — — 165,519 Disposed
June 12, 2026 SGMT Stock Option (Right to Buy) Series A Common Stock (39,567) $6.48 June 11, 2036 39,567 Acquired
May 27, 2026 KYTX Stock Option (right to buy) Common Stock (20,582) $8.59 May 27, 2036 20,582 Acquired
May 21, 2026 VERA Stock Option (right to buy) Class A Common Stock (17,084) $34.35 May 20, 2036 17,084 Acquired
June 9, 2025 SGMT Stock Option (Right to Buy) Series A Common Stock (32,250) $5.33 June 8, 2035 32,250 Acquired
June 6, 2025 SGMT Stock Option (Right to Buy) Series A Common Stock (28,522) $5.56 June 5, 2035 28,522 Acquired
May 29, 2025 KYTX Stock Option (right to buy) Common Stock (65,351) $2.63 May 29, 2035 65,351 Acquired
June 5, 2024 SGMT Stock Option (Right to Buy) Series A Common Stock (51,459) $4.64 June 4, 2034 51,459 Acquired
Feb. 12, 2024 KYTX Series B Redeemable Convertible Preferred Stock Common Stock (735,984) — — 3,349,538 Disposed
Feb. 12, 2024 KYTX Series B Redeemable Convertible Preferred Stock Common Stock (880,364) — — 4,006,624 Disposed
Feb. 12, 2024 KYTX Series A-2 Redeemable Convertible Preferred Stock Common Stock (1,940,388) — — 8,830,901 Disposed
Feb. 12, 2024 KYTX Series A-1 Redeemable Convertible Preferred Stock Common Stock (967,188) — — 4,401,771 Disposed
July 18, 2023 SGMT Stock Option (Right to Buy) Series A Common Stock (23,216) $6.36 April 28, 2029 23,216 Acquired
July 18, 2023 SGMT Stock Option (Right to Buy) Common Stock (23,216) $6.36 April 28, 2029 23,216 Disposed
July 18, 2023 SGMT Series F Preferred Stock Series A Common Stock (257,052) — — 20,430,107 Disposed
July 18, 2023 SGMT Series E Preferred Stock Series A Common Stock (1,297,549) — — 103,127,234 Disposed
July 18, 2023 SGMT Series E Preferred Stock Series A Common Stock (84,768) — — 6,737,254 Disposed
July 18, 2023 SGMT Series D Preferred Stock Series A Common Stock (76,796) — — 6,103,580 Disposed
July 18, 2023 SGMT Series C Preferred Stock Series A Common Stock (108,163) — — 8,596,589 Disposed
July 18, 2023 SGMT Series B-1 Preferred Stock Series A Common Stock (108,163) — — 8,596,590 Disposed
July 18, 2023 SGMT Series B Preferred Stock Series A Common Stock (6,208) — — 493,370 Disposed
July 18, 2023 SGMT Series A Preferred Stock Series A Common Stock (6,781) — — 539,006 Disposed
May 31, 2023 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (79,500) $1.53 May 30, 2033 79,500 Acquired
May 10, 2023 VERA Stock Option (right to buy) Class A Common Stock (20,000) $7.70 May 9, 2033 20,000 Acquired
June 23, 2022 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (31,500) $7.35 June 22, 2032 31,500 Acquired
May 24, 2022 VERA Stock Option (right to buy) Class A Common Stock (9,925) $16.14 May 23, 2032 9,925 Acquired
Oct. 24, 2021 PGNY Stock Option (right to buy) Common Stock (2,813) $63.21 Oct. 23, 2026 2,813 Acquired
Oct. 24, 2021 PGNY Stock Option (right to buy) Common Stock (17,003) $63.21 Oct. 23, 2026 17,003 Acquired
June 8, 2021 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (17,500) $13.80 June 7, 2031 17,500 Acquired
May 18, 2021 VERA Series C Preferred Stock Class A Common Stock (818,984) — — 818,984 Disposed
May 18, 2021 VERA Series B Preferred Stock Class A Common Stock (100,526) — — 100,526 Disposed
May 18, 2021 VERA Series A Preferred Stock Class A Common Stock (423,642) — — 423,642 Disposed
May 13, 2021 VERA Stock Option (right to buy) Class A Common Stock (9,925) $11.00 May 12, 2031 9,925 Acquired
April 15, 2021 PGNY Common Stock Warrants (right to buy) Common Stock (284,998) $1.73 Dec. 18, 2024 284,998 Disposed
April 15, 2021 PGNY Common Stock Warrants (right to buy) Common Stock (242,248) $1.73 Sept. 6, 2023 242,248 Disposed
Oct. 24, 2020 PGNY Stock Option (right to buy) Common Stock (4,799) $27.95 Oct. 23, 2030 4,799 Acquired
Oct. 24, 2020 PGNY Stock Option (right to buy) Common Stock (2,325) $27.95 Oct. 23, 2030 2,325 Acquired
Oct. 24, 2020 PGNY Stock Option (right to buy) Common Stock (29,000) $27.95 Oct. 23, 2030 29,000 Acquired
June 16, 2020 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (24,500) $10.54 June 15, 2030 24,500 Acquired
Oct. 29, 2019 PGNY Common Stock Warrants (right to buy) Common Stock (284,998) $1.73 Dec. 18, 2024 284,998 Acquired
Oct. 29, 2019 PGNY Series B Warrant (right to buy) Series B Preferred Stock (284,998) $1.73 Dec. 18, 2024 284,998 Disposed
Oct. 29, 2019 PGNY Common Stock Warrants (right to buy) Common Stock (242,248) $1.73 Sept. 6, 2023 242,248 Acquired
Oct. 29, 2019 PGNY Series B Warrant (right to buy) Series B Preferred Stock (242,248) $1.73 Sept. 6, 2023 242,248 Disposed
Oct. 29, 2019 PGNY Series B Preferred Stock Common Stock (10,753,784) — — 10,753,784 Disposed
Oct. 29, 2019 PGNY Series A Preferred Stock Common Stock (6,149,084) — — 6,149,084 Disposed
June 27, 2019 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (13,000) $20.25 June 26, 2029 13,000 Acquired
June 14, 2018 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (5,000) $45.65 June 13, 2025 5,000 Acquired
June 8, 2017 ATRA NonQualified Stock Option (Right to Buy) Common Stock (21,500) $13.20 June 8, 2024 21,500 Acquired
Jan. 3, 2017 ATRA NonQualified Stock Option (Right to Buy) Common Stock (5,500) $15.08 Jan. 3, 2024 5,500 Acquired
Jan. 4, 2016 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (10,500) $24.05 Jan. 4, 2023 10,500 Acquired
Jan. 16, 2015 ATRA Non-Qualified Stock Option (Right to Buy) Common Stock (25,000) $25.15 Jan. 16, 2022 25,000 Acquired
Oct. 21, 2014 ATRA Series B Preferred Stock Common Stock (18,135) — — 18,136 Disposed
Oct. 21, 2014 ATRA Series A Preferred Stock Common Stock (37,179) — — 37,179 Disposed
Oct. 21, 2014 ATRA Series B Preferred Stock Common Stock (607,235) — — 607,234 Disposed
Oct. 21, 2014 ATRA Series A Preferred Stock Common Stock (1,244,871) — — 1,244,871 Disposed
May 13, 2010 BCRX Non-Qualified Stock Option [F1] Common Stock (15,000) $7.01 May 13, 2020 15,000 Acquired
April 30, 2009 BCRX Non-Qualified Stock Option [F1] Common Stock (15,000) $3.96 April 30, 2019 15,000 Acquired
May 21, 2008 BCRX Stock Option [F1] Common Stock (15,000) $3.12 May 21, 2018 15,000 Acquired
May 16, 2007 BCRX Stock Option [F1] Common Stock (15,000) $7.98 May 16, 2017 15,000 Acquired
May 17, 2006 BCRX Stock Option Common Stock (15,000) $12.26 May 17, 2016 15,000 Acquired
Dec. 16, 2005 BCRX Stock Option Common Stock (4,167) $15.45 Dec. 16, 2015 4,167 Acquired
March 15, 2004 AMGN NQSO (Right to Buy) Common Stock (48,319) $59.48 March 15, 2011 48,319 Acquired
March 15, 2004 AMGN ISO (Right to Buy) Common Stock (1,681) $59.48 March 15, 2011 1,681 Acquired

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

Initial ownership (Form 3) 41 holdings

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

Date Ticker Security Shares Ownership
Aug. 6, 2026 LTGO Common Stock 429,553 Indirect
Aug. 6, 2026 LTGO Common Stock 46,855 Indirect
Aug. 6, 2026 LTGO Common Stock 27,956 Indirect
Aug. 6, 2026 LTGO Series Seed Convertible Preferred Stock→ Common Stock (938,979) 938,979 Indirect
Aug. 6, 2026 LTGO Series A Convertible Preferred Stock→ Common Stock (3,547,842) 3,547,842 Indirect
Aug. 6, 2026 LTGO Series A-2 Convertible Preferred Stock→ Common Stock (1,027,635) 1,027,635 Indirect
Aug. 6, 2026 LTGO Series A-2 Convertible Preferred Stock→ Common Stock (3,464,072) 3,464,072 Indirect
Aug. 6, 2026 LTGO Series B Convertible Preferred Stock→ Common Stock (1,484,401) 1,484,401 Indirect
Aug. 6, 2026 LTGO Series A-2 Convertible Preferred Stock→ Common Stock (2,066,857) 2,066,857 Indirect
Aug. 6, 2026 LTGO Convertible Promissory Note→ Common Stock (165,519) 165,519 Indirect
Feb. 7, 2024 KYTX Stock Option (Right to Buy)→ Common Stock (32,959) 32,959 Direct
Feb. 7, 2024 KYTX Series A-1 Redeemable Convertible Preferred Stock→ Common Stock — Indirect
Feb. 7, 2024 KYTX Series A-2 Redeemable Convertible Preferred Stock→ Common Stock — Indirect
Feb. 7, 2024 KYTX Series B Redeemable Convertible Preferred Stock→ Common Stock — Indirect
Feb. 7, 2024 KYTX Series B Redeemable Convertible Preferred Stock→ Common Stock — Indirect
July 13, 2023 SGMT Common Stock 38,763 Indirect
July 13, 2023 SGMT Series A Preferred Stock→ Common Stock (6,781) 6,781 Indirect
July 13, 2023 SGMT Series B Preferred Stock→ Common Stock (6,208) 6,208 Indirect
July 13, 2023 SGMT Series B-1 Preferred Stock→ Common Stock (108,163) 108,163 Indirect
July 13, 2023 SGMT Series C Preferred Stock→ Common Stock (108,163) 108,163 Indirect
July 13, 2023 SGMT Series D Preferred Stock→ Common Stock (76,796) 76,796 Indirect
July 13, 2023 SGMT Series E Preferred Stock→ Common Stock (84,768) 84,768 Direct
July 13, 2023 SGMT Series E Preferred Stock→ Common Stock (1,297,549) 1,297,549 Indirect
July 13, 2023 SGMT Series F Preferred Stock→ Common Stock (257,052) 257,052 Indirect
July 13, 2023 SGMT Stock Option (Right to Buy)→ Common Stock (23,216) 23,216 Direct
May 13, 2021 VERA Series A Preferred Stock→ Class A Common Stock (423,642) 423,642 Indirect
May 13, 2021 VERA Series B Preferred Stock→ Class A Common Stock (100,526) 100,526 Indirect
May 13, 2021 VERA Series C Preferred Stock→ Class A Common Stock (818,984) 818,984 Indirect
May 13, 2021 VERA Stock Option (right to buy)→ Class A Common Stock (69,043) 69,043 Direct
Oct. 24, 2019 PGNY Common Stock 719,028 Indirect
Oct. 24, 2019 PGNY Series A Preferred Stock→ Common Stock (6,149,084) 6,149,084 Indirect
Oct. 24, 2019 PGNY Series B Preferred Stock→ Common Stock (10,753,784) 10,753,784 Indirect
Oct. 24, 2019 PGNY Series B Warrant (right to buy)→ Series B Preferred Stock (242,248) 242,248 Indirect
Oct. 24, 2019 PGNY Series B Warrant (right to buy)→ Series B Preferred Stock (284,998) 284,998 Indirect
Oct. 24, 2019 PGNY Stock Option (right to buy)→ Common Stock (52,800) 52,800 Direct
Oct. 15, 2014 ATRA Common Stock 746,923 Indirect
Oct. 15, 2014 ATRA Common Stock 22,307 Indirect
Oct. 15, 2014 ATRA Series A Preferred Stock→ Common Stock (1,244,871) 1,244,871 Indirect
Oct. 15, 2014 ATRA Series B Preferred Stock→ Common Stock (607,234) 607,234 Indirect
Oct. 15, 2014 ATRA Series A Preferred Stock→ Common Stock (37,179) 37,179 Indirect
Oct. 15, 2014 ATRA Series B Preferred Stock→ Common Stock (18,136) 18,136 Indirect