Kirk Nielsen

CIK 1523522 · View on SEC EDGAR ↗

Activist

First SEC filing: Feb. 10, 2026 · Latest: Feb. 10, 2026

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Insider at

Insider transactions

1 buys (P) 0 sells (S) Net: $2,640,000 + 21 non-open-market transactions below Avg return of open purchases vs now: 66.3% 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

21 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Feb. 9, 2026 SGP P 165,000 $16.00 $2,640,000 3,310,619 Indirect +5.25% Acquired 66.3% (price as of 2026-08-21)
May 15, 2025 CVRX P 10,966 $5.45 $59,765 1,910,134 Indirect +0.58% Acquired -46.3% (price as of 2026-08-21)
May 14, 2025 CVRX P 61,200 $5.23 $320,076 1,899,168 Indirect +3.33% Acquired -44.1% (price as of 2026-08-21)
May 13, 2025 CVRX P 101,413 $5.29 $536,475 1,837,968 Indirect +5.84% Acquired -44.7% (price as of 2026-08-21)
May 12, 2025 CVRX P 25,200 $4.79 $120,708 1,736,555 Indirect +1.47% Acquired -38.9% (price as of 2026-08-21)
May 24, 2022 CVRX P 8,070 $5.05 $40,754 1,711,355 Indirect +0.47% Acquired -42.1% (price as of 2026-08-21)
May 23, 2022 CVRX P 4,432 $5.04 $22,337 1,703,285 Indirect +0.26% Acquired -42.0% (price as of 2026-08-21)
May 20, 2022 CVRX P 13,387 $5.04 $67,470 1,698,853 Indirect +0.79% Acquired -42.0% (price as of 2026-08-21)
May 19, 2022 CVRX P 10,976 $5.04 $55,319 1,685,466 Indirect +0.66% Acquired -42.0% (price as of 2026-08-21)
May 5, 2022 CVRX P 3,992 $6.00 $23,952 1,674,490 Indirect +0.24% Acquired -51.3% (price as of 2026-08-21)
May 4, 2022 CVRX P 25,503 $5.99 $152,763 1,670,498 Indirect +1.55% Acquired -51.2% (price as of 2026-08-21)
May 3, 2022 CVRX P 32,809 $6.00 $196,854 1,644,995 Indirect +2.04% Acquired -51.3% (price as of 2026-08-21)
May 2, 2022 CVRX P 41,988 $5.97 $250,668 1,612,186 Indirect +2.67% Acquired -51.0% (price as of 2026-08-21)
April 28, 2022 CVRX P 100 $5.97 $597 1,570,198 Indirect +0.01% Acquired -51.0% (price as of 2026-08-21)
Feb. 24, 2022 CVRX P 3,400 $8.24 $28,016 1,570,098 Indirect +0.22% Acquired -64.5% (price as of 2026-08-21)
Feb. 23, 2022 CVRX P 38,200 $8.04 $307,128 1,566,698 Indirect +2.50% Acquired -63.6% (price as of 2026-08-21)
Feb. 22, 2022 CVRX P 40,008 $7.94 $317,664 1,528,498 Indirect +2.69% Acquired -63.2% (price as of 2026-08-21)
Feb. 18, 2022 CVRX P 26,659 $7.92 $211,139 1,488,490 Indirect +1.82% Acquired -63.1% (price as of 2026-08-21)

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
June 1, 2026 CVRX Stock Option (right to buy) Common Stock (11,182) $5.43 June 1, 2036 11,182 Acquired
Feb. 9, 2026 SGP Series B Preferred Stock Common Stock (1,690,230) — — 1,690,230 Disposed
Feb. 9, 2026 SGP Series C-1 Preferred Stock Common Stock (548,067) — — 548,067 Disposed
Feb. 9, 2026 SGP Series D Preferred Stock Common Stock (359,255) — — 359,255 Disposed
Feb. 9, 2026 SGP Series C-2 Preferred Stock Common Stock (548,067) — — 548,067 Disposed
Feb. 9, 2026 SGP Series C-2 Preferred Stock Common Stock (548,067) — — 3,142,015 Disposed
Feb. 9, 2026 SGP Series D Preferred Stock Common Stock (359,255) — — 2,059,573 Disposed
Feb. 9, 2026 SGP Series C-1 Preferred Stock Common Stock (548,067) — — 3,142,015 Disposed
Feb. 9, 2026 SGP Series B Preferred Stock Common Stock (1,690,230) — — 9,689,922 Disposed
June 4, 2024 CVRX Stock Option (right to buy) Common Stock (27,250) $6.49 June 4, 2034 27,250 Acquired
June 4, 2024 CVRX Stock Option (right to buy) Common Stock (20,961) $6.49 June 4, 2034 20,961 Acquired
June 5, 2023 CVRX Stock Option (right to buy) Common Stock (12,012) $12.33 June 4, 2033 12,012 Acquired
June 7, 2022 CVRX Stock Option (right to buy) Common Stock (26,985) $6.76 June 6, 2032 26,985 Acquired
July 2, 2021 CVRX Series G Preferred Stock Common Stock (1,461,831) — — 23,125,000 Disposed
June 29, 2021 CVRX Stock Option (right to buy) Common Stock (10,382) $18.00 June 28, 2031 10,382 Acquired

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

Initial ownership (Form 3) 6 holdings

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

Date Ticker Security Shares Ownership
Feb. 5, 2026 SGP Series B Preferred Stock→ Common Stock (1,690,230) 1,690,230 Indirect
Feb. 5, 2026 SGP Series C-1 Preferred Stock→ Common Stock (548,067) 548,067 Indirect
Feb. 5, 2026 SGP Series C-2 Preferred Stock→ Common Stock (548,067) 548,067 Indirect
Feb. 5, 2026 SGP Series D Preferred Stock→ Common Stock (359,255) 359,255 Indirect
June 29, 2021 CVRX Series G Preferred Stock→ Common Stock (1,461,831) 1,461,831 Indirect
June 29, 2021 CVRX Stock Option→ Common Stock (1,264) 1,264 Direct