William N. Thorndike, Jr.

Activist

First SEC filing: March 10, 2026 · Latest: March 10, 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

Insider transactions

0 buys (P) 1 sells (S) Net: $-1,101,600 + 50 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

50 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 4, 2026	CNX	M	83,097	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 4, 2026	CNX	S	28,800	$38.25	$1,101,600	426,585 Direct	-6.32%	Disposed	-4.8% (price as of 2026-08-21)
May 4, 2026	CNX	M	83,097	$13.19	$1,096,049	455,385 Direct	+22.32%	Acquired	176.1% (price as of 2026-08-21)
May 2, 2024	CNX	A	11,058	—	—	11,058 Direct	—	Acquired	(price as of 2026-08-21)
May 2, 2024	CNX	A	17,242	—	—	372,288 Direct	+4.86%	Acquired	(price as of 2026-08-21)
May 4, 2023	CNX	A	16,289	—	—	16,289 Direct	—	Acquired	(price as of 2026-08-21)
May 4, 2023	CNX	A	27,342	—	—	355,046 Direct	+8.34%	Acquired	(price as of 2026-08-21)
May 5, 2022	CNX	A	10,850	—	—	10,850 Direct	—	Acquired	(price as of 2026-08-21)
May 5, 2022	CNX	A	19,503	—	—	327,704 Direct	+6.33%	Acquired	(price as of 2026-08-21)
Nov. 8, 2021	PRM	J	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 8, 2021	PRM	J	500,000	—	—	500,000 Direct	—	Acquired	(price as of 2026-08-21)
May 6, 2021	CNX	A	37,620	—	—	308,201 Direct	+13.90%	Acquired	(price as of 2026-08-21)
May 6, 2020	CNX	A	18,503	—	—	18,503 Direct	—	Acquired	(price as of 2026-08-21)
May 6, 2020	CNX	A	50,802	—	—	270,581 Direct	+23.12%	Acquired	(price as of 2026-08-21)
May 29, 2019	CNX	A	14,368	—	—	14,368 Direct	—	Acquired	(price as of 2026-08-21)
May 29, 2019	CNX	A	59,683	—	—	219,779 Direct	+37.28%	Acquired	(price as of 2026-08-21)
May 9, 2018	CNX	A	7,693	—	—	7,693 Direct	—	Acquired	(price as of 2026-08-21)
May 9, 2018	CNX	A	28,940	—	—	160,096 Direct	+22.07%	Acquired	(price as of 2026-08-21)
Feb. 12, 2018	CNX	P	35,000	$12.80	$448,000	35,000 Indirect	—	Acquired	184.5% (price as of 2026-08-21)
May 9, 2017	CNX	A	38,241	—	—	130,662 Direct	+41.38%	Acquired	(price as of 2026-08-21)
May 11, 2016	CNX	A	71,943	—	—	71,943 Direct	—	Acquired	(price as of 2026-08-21)
March 3, 2016	CNX	A	10	—	—	92,421 Direct	+0.01%	Acquired	(price as of 2026-08-21)
Nov. 20, 2015	CNX	A	14	—	—	92,411 Direct	+0.02%	Acquired	(price as of 2026-08-21)
Nov. 17, 2015	CNX	P	30,000	$7.78	$233,400	92,397 Direct	+48.08%	Acquired	461.7% (price as of 2026-08-21)
Aug. 24, 2015	CNX	A	9	—	—	62,397 Direct	+0.01%	Acquired	(price as of 2026-08-21)
Aug. 7, 2015	CNX	P	45,400	$13.46	$611,084	62,388 Direct	+267.25%	Acquired	224.7% (price as of 2026-08-21)
Aug. 7, 2015	CNX	P	4,600	$14.24	$65,504	16,988 Direct	+37.13%	Acquired	206.9% (price as of 2026-08-21)
July 30, 2015	CNX	P	50,000	$16.88	$844,000	50,000 Indirect	—	Acquired	158.9% (price as of 2026-08-21)
May 21, 2015	CNX	A	22	—	—	12,388 Direct	+0.18%	Acquired	(price as of 2026-08-21)
May 6, 2015	CNX	A	3,631	—	—	12,366 Direct	+41.57%	Acquired	(price as of 2026-08-21)
May 6, 2015	CNX	A	4,539	—	—	8,735 Direct	+108.17%	Acquired	(price as of 2026-08-21)
March 5, 2015	CNX	A	7	—	—	4,196 Direct	+0.17%	Acquired	(price as of 2026-08-21)
Dec. 2, 2014	CNX	A	6	—	—	4,189 Direct	+0.14%	Acquired	(price as of 2026-08-21)
Nov. 1, 2014	CNX	A	2,378	—	—	4,183 Direct	+131.75%	Acquired	(price as of 2026-08-21)
Oct. 21, 2014	CNX	A	1,805	$35.24	$63,608	1,805 Direct	—	Acquired	24.0% (price as of 2026-08-21)
July 24, 2013	LMAT	A	7,500	—	—	7,500 Direct	—	Acquired	(price as of 2026-08-21)
May 7, 2013	LMAT	S	5,051	$6.04	$30,508	0 Indirect	-100.00%	Disposed	1254.3% (price as of 2026-08-21)
March 12, 2013	LMAT	S	5,674	$6.00	$34,044	5,051 Indirect	-52.90%	Disposed	1263.3% (price as of 2026-08-21)
March 11, 2013	LMAT	S	204	$6.00	$1,224	10,725 Indirect	-1.87%	Disposed	1263.3% (price as of 2026-08-21)
March 8, 2013	LMAT	S	600	$6.02	$3,612	10,929 Indirect	-5.20%	Disposed	1258.8% (price as of 2026-08-21)
March 7, 2013	LMAT	S	10,000	$6.00	$60,000	11,529 Indirect	-46.45%	Disposed	1263.3% (price as of 2026-08-21)
March 6, 2013	LMAT	M	15,000	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-21)
March 6, 2013	LMAT	M	10,529	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-21)
March 6, 2013	LMAT	S	4,000	$6.03	$24,120	21,529 Indirect	-15.67%	Disposed	1256.6% (price as of 2026-08-21)
March 6, 2013	LMAT	M	15,000	$3.00	$45,000	25,529 Indirect	+142.46%	Acquired	2626.7% (price as of 2026-08-21)
March 6, 2013	LMAT	M	10,529	$3.40	$35,799	10,529 Indirect	—	Acquired	2305.9% (price as of 2026-08-21)
March 5, 2013	LMAT	M	1,200	—	—	10,529 Indirect	-10.23%	Disposed	(price as of 2026-08-21)
March 5, 2013	LMAT	S	1,200	$6.08	$7,296	0 Indirect	-100.00%	Disposed	1245.4% (price as of 2026-08-21)
March 5, 2013	LMAT	M	1,200	$3.40	$4,080	1,200 Indirect	—	Acquired	2305.9% (price as of 2026-08-21)
March 4, 2013	LMAT	M	3,271	—	—	11,729 Indirect	-21.81%	Disposed	(price as of 2026-08-21)
March 4, 2013	LMAT	M	8,291	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-21)
March 4, 2013	LMAT	S	3,271	$6.03	$19,724	0 Indirect	-100.00%	Disposed	1256.6% (price as of 2026-08-21)
March 4, 2013	LMAT	M	3,271	$3.40	$11,121	3,271 Indirect	—	Acquired	2305.9% (price as of 2026-08-21)
March 4, 2013	LMAT	S	8,291	$6.05	$50,161	0 Indirect	-100.00%	Disposed	1252.1% (price as of 2026-08-21)
March 4, 2013	LMAT	M	8,291	$5.85	$48,502	8,291 Indirect	—	Acquired	1298.3% (price as of 2026-08-21)
March 1, 2013	LMAT	M	1,709	—	—	8,291 Indirect	-17.09%	Disposed	(price as of 2026-08-21)
March 1, 2013	LMAT	S	1,709	$6.02	$10,288	0 Indirect	-100.00%	Disposed	1258.8% (price as of 2026-08-21)
March 1, 2013	LMAT	M	1,709	$5.85	$9,998	1,709 Indirect	—	Acquired	1298.3% (price as of 2026-08-21)
July 25, 2012	LMAT	A	15,000	—	—	15,000 Indirect	—	Acquired	(price as of 2026-08-21)
July 26, 2011	LMAT	A	15,000	—	—	15,000 Indirect	—	Acquired	(price as of 2026-08-21)
July 26, 2010	LMAT	A	15,000	—	—	15,000 Indirect	—	Acquired	(price as of 2026-08-21)
May 19, 2010	LMAT	M	2,000	$3.62	$7,240	1,393,314 Indirect	+0.14%	Acquired	2159.7% (price as of 2026-08-21)
May 19, 2010	LMAT	M	2,000	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-21)
May 19, 2010	LMAT	M	2,000	$3.62	$7,240	1,423,048 Indirect	+0.14%	Acquired	2159.7% (price as of 2026-08-21)
July 27, 2009	LMAT	A	15,000	—	—	15,000 Indirect	—	Acquired	(price as of 2026-08-21)
Sept. 1, 2008	LMAT	A	15,000	$3.40	$51,000	15,000 Indirect	—	Acquired	2305.9% (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 4, 2026	CNX	Stock Option (right to buy)	Common shares, $0.01 par value per share	—	May 11, 2026	83,097	Disposed
May 2, 2024	CNX	Stock Option (right to buy)	Common shares, $0.01 per share (11,058)	$23.20	May 2, 2034	11,058	Acquired
May 4, 2023	CNX	Stock Option (right to buy)	Common shares, $0.01 per share (16,289)	$14.63	May 4, 2033	16,289	Acquired
May 5, 2022	CNX	Stock Option (right to buy)	Common shares, $0.01 par value per share (10,850)	$10.60	May 5, 2032	10,850	Acquired
Nov. 8, 2021	PRM	Warrants (right to buy)	Ordinary Shares (125,000)	$12.00	Nov. 12, 2024	500,000	Acquired
May 6, 2020	CNX	Common shares, $0.01 par value per share	Common shares, $0.01 par value per share (18,503)	$9.99	May 6, 2030	18,503	Acquired
May 29, 2019	CNX	Common shares, $0.01 par value per share	Common shares, $0.01 par value per share (14,368)	$7.54	May 29, 2029	14,368	Acquired
May 9, 2018	CNX	Stock Option (right to buy)	Common shares, $0.01 par value per share (7,693)	$15.55	May 9, 2028	7,693	Acquired
May 11, 2016	CNX	Stock Option (right to buy)	Common shares, $0.01 par value per share (71,943)	$15.23	May 11, 2026	71,943	Acquired
July 24, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (7,500)	$6.67	July 24, 2018	7,500	Acquired
March 6, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$3.00	March 6, 2013	15,000	Disposed
March 6, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (10,529)	$3.40	March 6, 2013	10,529	Disposed
March 5, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (1,200)	$3.40	March 6, 2013	1,200	Disposed
March 4, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (3,271)	$3.40	March 6, 2013	3,271	Disposed
March 4, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (8,291)	$5.85	March 6, 2013	8,291	Disposed
March 1, 2013	LMAT	Stock Option (Right to Buy)	Common Stock (1,709)	$5.85	March 6, 2013	1,709	Disposed
July 25, 2012	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$6.23	July 25, 2017	15,000	Acquired
July 26, 2011	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$7.10	July 26, 2016	15,000	Acquired
July 26, 2010	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$5.85	July 26, 2015	15,000	Acquired
May 19, 2010	LMAT	Stock Option (Right to Buy)	Common Stock (2,000)	$3.62	July 31, 2010	2,000	Disposed
July 27, 2009	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$3.00	July 27, 2014	15,000	Acquired
Sept. 1, 2008	LMAT	Stock Option (Right to Buy)	Common Stock (15,000)	$3.40	Sept. 1, 2013	15,000	Acquired

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

Initial ownership (Form 3) 27 holdings

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

Date	Ticker	Security	Shares	Ownership
Dec. 19, 2012	LMAT	Common Stock	87,202	Direct
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (3,500)	3,500	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (1,503)	1,503	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (1,327)	1,327	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (8,170)	8,170	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (15,000)	15,000	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (15,000)	15,000	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (10,000)	10,000	Indirect
Dec. 19, 2012	LMAT	Stock Option (Right to Buy)→ Common Stock (5,000)	5,000	Indirect
June 20, 2008	LMAT	Common Stock	1,275,850	Indirect
June 20, 2008	LMAT	Common Stock	1,666	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (2,000)	2,000	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (3,500)	3,500	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (3,500)	3,500	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (1,503)	1,503	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (1,327)	1,327	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (8,170)	8,170	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (7,500)	7,500	Indirect
June 20, 2008	LMAT	Common Stock	1,275,850	Indirect
June 20, 2008	LMAT	Common Stock	1,666	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (2,000)	2,000	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (3,500)	3,500	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (3,500)	3,500	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (1,503)	1,503	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (1,327)	1,327	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (8,170)	8,170	Indirect
June 20, 2008	LMAT	Stock Option (Right to Buy)→ Common Stock (7,500)	7,500	Indirect