Alper Ilkbahar

CIK 2059630 · View on SEC EDGAR ↗

Insider

First SEC filing: March 14, 2025 · Latest: June 2, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

SNDK selling June 1, 2026

Insider transactions

0 buys (P) 3 sells (S) Net: $-3,513,152 + 21 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

21 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 2, 2026	SNDK	G	2,694	—	—	49,983 Direct	-5.11%	Disposed	(price as of 2026-08-21)
June 1, 2026	SNDK	S	600	$1758.40	$1,055,040	52,677 Direct	-1.13%	Disposed	-8.7% (price as of 2026-08-21)
June 1, 2026	SNDK	S	401	$1757.00	$704,557	53,277 Direct	-0.75%	Disposed	-8.7% (price as of 2026-08-21)
June 1, 2026	SNDK	S	999	$1755.31	$1,753,555	53,678 Direct	-1.83%	Disposed	-8.6% (price as of 2026-08-21)
May 25, 2026	SNDK	F	653	$1478.69	$965,585	54,677 Direct	-1.18%	Disposed	8.5% (price as of 2026-08-21)
May 21, 2026	SNDK	F	319	$1542.24	$491,975	55,330 Direct	-0.57%	Disposed	4.1% (price as of 2026-08-21)
May 20, 2026	SNDK	F	162	$1392.56	$225,595	55,649 Direct	-0.29%	Disposed	15.3% (price as of 2026-08-21)
April 20, 2026	SNDK	F	2,251	$913.02	$2,055,208	55,811 Direct	-3.88%	Disposed	75.8% (price as of 2026-08-21)
Feb. 25, 2026	SNDK	F	566	$632.38	$357,927	58,062 Direct	-0.97%	Disposed	153.8% (price as of 2026-08-21)
Feb. 21, 2026	SNDK	F	223	$649.97	$144,943	58,628 Direct	-0.38%	Disposed	146.9% (price as of 2026-08-21)
Feb. 20, 2026	SNDK	F	122	$649.97	$79,296	58,851 Direct	-0.21%	Disposed	146.9% (price as of 2026-08-21)
Nov. 25, 2025	SNDK	F	653	$220.50	$143,986	58,973 Direct	-1.10%	Disposed	627.9% (price as of 2026-08-21)
Nov. 21, 2025	SNDK	F	319	$200.27	$63,886	59,626 Direct	-0.53%	Disposed	701.4% (price as of 2026-08-21)
Nov. 20, 2025	SNDK	F	162	$195.96	$31,746	59,945 Direct	-0.27%	Disposed	719.0% (price as of 2026-08-21)
Sept. 3, 2025	SNDK	A	26,161	—	—	60,107 Direct	+77.07%	Acquired	(price as of 2026-08-21)
Aug. 25, 2025	SNDK	F	653	$46.78	$30,547	33,946 Direct	-1.89%	Disposed	3331.0% (price as of 2026-08-21)
Aug. 21, 2025	SNDK	F	1,278	$45.50	$58,149	34,599 Direct	-3.56%	Disposed	3427.5% (price as of 2026-08-21)
Aug. 20, 2025	SNDK	F	1,095	$44.40	$48,618	35,877 Direct	-2.96%	Disposed	3514.9% (price as of 2026-08-21)
May 25, 2025	SNDK	F	653	$37.28	$24,344	36,972 Direct	-1.74%	Disposed	4205.3% (price as of 2026-08-21)
May 20, 2025	SNDK	F	162	$40.18	$6,509	37,625 Direct	-0.43%	Disposed	3894.5% (price as of 2026-08-21)
May 9, 2025	SNDK	A	149,046	—	—	149,046 Direct	—	Acquired	(price as of 2026-08-21)
April 20, 2025	SNDK	F	1,501	$31.29	$46,966	37,787 Direct	-3.82%	Disposed	5029.4% (price as of 2026-08-21)
March 20, 2025	SNDK	F	1,558	$56.21	$87,575	39,288 Direct	-3.81%	Disposed	2755.4% (price as of 2026-08-21)
March 12, 2025	SNDK	F	569	$50.44	$28,700	40,846 Direct	-1.37%	Disposed	3082.0% (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
May 9, 2025	SNDK	Performance Shares	Common Stock (149,046)	—	—	149,046	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
March 14, 2025	SNDK	Common Stock	41,415	Direct