Seth Lederman

CIK 1563420 · View on SEC EDGAR ↗

Insider

First SEC filing: June 9, 2026 · Latest: June 9, 2026

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Insider transactions

1 buys (P) 0 sells (S) Net: $58,950 + 24 non-open-market transactions below Avg return of open purchases vs now: 8.5% 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

24 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
June 9, 2026 TNXP P 5,000 $11.79 $58,950 9,005 — — 8.5% (price as of 2026-08-19)
June 29, 2022 TNXP P 20,000 $1.71 $34,200 24,235 Indirect +472.26% Acquired -100.0% (price as of 2026-08-19)
March 25, 2022 TNXP P 100,000 $0.24 $24,000 112,177 Direct +821.22% Acquired -100.0% (price as of 2026-08-19)
Sept. 28, 2021 TNXP P 12,000 $0.61 $7,320 12,177 Direct +6779.66% Acquired -100.0% (price as of 2026-08-19)
March 24, 2021 TNXP P 16,733 $1.32 $22,088 135,000 Indirect +14.15% Acquired -100.0% (price as of 2026-08-19)
Dec. 30, 2020 TNXP P 35,000 $0.68 $23,800 118,267 Direct +42.03% Acquired -100.0% (price as of 2026-08-19)
Aug. 13, 2020 TNXP P 60,000 $0.91 $54,600 83,267 Indirect +257.88% Acquired -100.0% (price as of 2026-08-19)
Dec. 3, 2019 TNXP P 20,000 $1.16 $23,200 23,267 Indirect +612.18% Acquired -100.0% (price as of 2026-08-19)
March 29, 2019 TNXP P 5,000 $2.49 $12,450 32,670 Indirect +18.07% Acquired -100.0% (price as of 2026-08-19)
March 26, 2019 TNXP P 25,000 $2.38 $59,500 27,670 Indirect +936.33% Acquired -100.0% (price as of 2026-08-19)
March 23, 2016 TNXP P 8,000 $2.44 $19,520 80,815 Direct +10.99% Acquired -100.0% (price as of 2026-08-19)
Sept. 25, 2015 TNXP P 6,000 $6.50 $39,000 71,074 Direct +9.22% Acquired -100.0% (price as of 2026-08-19)
July 17, 2015 TNXP P 6,000 $7.50 $45,000 6,000 Indirect — Acquired -100.0% (price as of 2026-08-19)
March 17, 2015 TNXP P 1,000 $7.18 $7,180 65,074 Direct +1.56% Acquired -100.0% (price as of 2026-08-19)
March 16, 2015 TNXP P 1,000 $6.85 $6,850 64,074 Direct +1.59% Acquired -100.0% (price as of 2026-08-19)
March 13, 2015 TNXP P 1,000 $7.21 $7,210 63,074 Direct +1.61% Acquired -100.0% (price as of 2026-08-19)
March 12, 2015 TNXP P 1,000 $7.26 $7,260 62,074 Direct +1.64% Acquired -100.0% (price as of 2026-08-19)
March 11, 2015 TNXP P 1,000 $7.00 $7,000 61,074 Direct +1.66% Acquired -100.0% (price as of 2026-08-19)
March 10, 2015 TNXP P 1,000 $6.90 $6,900 60,074 Direct +1.69% Acquired -100.0% (price as of 2026-08-19)
March 9, 2015 TNXP P 1,000 $6.50 $6,500 59,074 Direct +1.72% Acquired -100.0% (price as of 2026-08-19)
March 6, 2015 TNXP P 1,000 $6.45 $6,450 58,074 Direct +1.75% Acquired -100.0% (price as of 2026-08-19)
March 5, 2015 TNXP P 1,000 $6.48 $6,480 57,074 Direct +1.78% Acquired -100.0% (price as of 2026-08-19)
March 4, 2015 TNXP P 1,000 $6.05 $6,050 56,074 Direct +1.82% Acquired -100.0% (price as of 2026-08-19)
Feb. 9, 2015 TNXP P 5,000 $5.85 $29,250 55,074 Direct +9.99% Acquired -100.0% (price as of 2026-08-19)
Aug. 14, 2013 TNXP P 11,765 — — 11,765 Direct — Acquired (price as of 2026-08-19)
Aug. 14, 2013 TNXP P 11,765 — — 50,074 Direct +30.71% Acquired (price as of 2026-08-19)
May 20, 2013 TNXP P 400 $7.75 $3,100 38,309 Direct +1.06% Acquired -100.0% (price as of 2026-08-19)
May 20, 2013 TNXP P 600 $7.00 $4,200 37,909 Direct +1.61% Acquired -100.0% (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
Feb. 15, 2022 TNXP Stock Option Common Stock (5,000,000) $0.21 Feb. 15, 2032 5,000,000 Acquired
Feb. 15, 2022 TNXP Stock Option Common Stock (5,000,000) $0.41 Feb. 15, 2032 5,000,000 Acquired
Feb. 15, 2022 TNXP Stock Option Common Stock (5,000,000) $0.62 Feb. 15, 2032 5,000,000 Acquired
Feb. 15, 2022 TNXP Stock Option Common Stock (5,000,000) $0.83 Feb. 15, 2032 5,000,000 Acquired
Feb. 23, 2021 TNXP Stock Option Common Stock (3,000,000) $1.22 Feb. 23, 2031 3,000,000 Acquired
Feb. 23, 2021 TNXP Stock Option Common Stock (3,000,000) $1.53 Feb. 23, 2031 3,000,000 Acquired
May 4, 2020 TNXP Stock Option Common Stock (2,000,000) $0.77 May 4, 2030 2,000,000 Acquired
May 4, 2020 TNXP Stock Option Common Stock (2,000,000) $0.96 May 4, 2030 2,000,000 Acquired
Feb. 25, 2020 TNXP Stock Option Common Stock (120,000) $0.40 Feb. 25, 2030 120,000 Acquired
Feb. 25, 2020 TNXP Stock Option Common Stock (120,000) $0.50 Feb. 25, 2030 120,000 Acquired
May 6, 2019 TNXP Stock Option Common Stock (129,758) $2.05 May 6, 2029 129,758 Acquired
May 6, 2019 TNXP Stock Option Common Stock (129,757) $2.56 May 6, 2029 129,757 Acquired
Feb. 26, 2019 TNXP Stock Option Common Stock (23,265) $1.89 Feb. 25, 2029 23,265 Acquired
Feb. 26, 2019 TNXP Stock Option Common Stock (23,265) $2.36 Feb. 25, 2029 23,265 Acquired
Feb. 9, 2016 TNXP Stock Option Common Stock (110,000) $5.03 Feb. 9, 2026 110,000 Acquired
Feb. 9, 2016 TNXP Stock Option Common Stock (110,000) $5.03 Feb. 9, 2026 110,000 Acquired
Feb. 25, 2015 TNXP Stock Option Common Stock (7,143) $5.95 Feb. 25, 2025 7,143 Acquired
Feb. 25, 2015 TNXP Stock Option Common Stock (189,000) $5.95 Feb. 25, 2025 189,000 Acquired
Oct. 29, 2014 TNXP Stock Option Common Stock (100,000) $6.68 Oct. 29, 2024 100,000 Acquired
June 17, 2014 TNXP Stock Option Common Stock (100,000) $9.87 June 17, 2024 100,000 Acquired
Feb. 11, 2014 TNXP Stock Option Common Stock (71,000) $15.88 Feb. 11, 2024 71,000 Acquired
Aug. 14, 2013 TNXP Series A common stock purchase warrant common stock (11,765) $4.25 Aug. 14, 2018 11,765 Acquired
Feb. 12, 2013 TNXP Stock Option Common Stock (1,350,000) $0.51 Feb. 12, 2023 1,350,000 Acquired

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

Initial ownership (Form 3) 18 holdings

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

Date Ticker Security Shares Ownership
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 746,165 Direct
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 3,692,558 Indirect
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 649,138 Indirect
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 1,179,424 Indirect
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 83,333 Indirect
Jan. 14, 2013 TNXP Common Stock, Par Value $0.001 83,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (90,000) 90,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (1,000,000) 1,000,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (1,000,000) 1,000,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (10,000) 10,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (10,000) 10,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (233,333) 233,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (233,333) 233,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (165,000) 165,000 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (83,333) 83,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (83,333) 83,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (83,333) 83,333 Indirect
Jan. 14, 2013 TNXP Warrants→ Common Stock (83,333) 83,333 Indirect

Compensation (DEF 14A)

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

TNXP

Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2025 $702,000 $596,700 — $1,870,130 — — — $3,168,830
2023 $675,000 — — $1,375,065 — — — $2,050,065
2021 $675,000 $506,250 — $6,527,139 — — — $7,708,389

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