Gilbert E Nathan

Insider

First SEC filing: May 23, 2023 · Latest: May 23, 2023

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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

6 buys (P) 0 sells (S) Net: $490,110 + 22 non-open-market transactions below Avg return of open purchases vs now: 6.4% 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

22 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 11, 2026	ALTO	P	50,000	$4.15	$207,500	856,393 Direct	+6.20%	Acquired	0.7% (price as of 2026-08-19)
Aug. 1, 2026	MX	A	51,191	—	—	265,682 Direct	+23.87%	Acquired	(price as of 2026-08-19)
June 23, 2026	ALTO	A	31,652	—	—	806,393 Direct	+4.09%	Acquired	(price as of 2026-08-19)
May 13, 2026	ALTO	P	5,000	$4.45	$22,250	774,741 Direct	+0.65%	Acquired	-6.1% (price as of 2026-08-19)
May 12, 2026	ALTO	P	20,000	$4.61	$92,200	769,741 Direct	+2.67%	Acquired	-9.3% (price as of 2026-08-19)
March 16, 2026	MX	P	21,994	$2.87	$63,123	158,200 Indirect	+16.15%	Acquired	15.0% (price as of 2026-08-19)
March 13, 2026	MX	P	13,006	$2.79	$36,287	136,206 Indirect	+10.56%	Acquired	18.3% (price as of 2026-08-19)
March 12, 2026	MX	P	25,000	$2.75	$68,750	123,200 Indirect	+25.46%	Acquired	20.0% (price as of 2026-08-19)
Feb. 15, 2026	MX	A	1,478	—	—	214,491 Direct	+0.69%	Acquired	(price as of 2026-08-19)
Nov. 15, 2025	MX	A	6,320	—	—	213,013 Direct	+3.06%	Acquired	(price as of 2026-08-19)
July 9, 2025	ALTO	A	49,166	—	—	749,741 Direct	+7.02%	Acquired	(price as of 2026-08-19)
July 1, 2025	MX	A	50,650	—	—	206,693 Direct	+32.46%	Acquired	(price as of 2026-08-19)
March 13, 2025	MX	P	20,000	$3.68	$73,600	98,200 Indirect	+25.58%	Acquired	-10.3% (price as of 2026-08-19)
March 10, 2025	RCD	P	5,000	$5.12	$25,600	118,106 Direct	+4.42%	Acquired	354.1% (price as of 2026-08-19)
Feb. 22, 2025	RCD	A	17,857	—	—	113,106 Direct	+18.75%	Acquired	(price as of 2026-08-19)
Nov. 13, 2024	ALTO	P	5,000	$1.32	$6,600	31,200 Indirect	+19.08%	Acquired	216.7% (price as of 2026-08-19)
Nov. 13, 2024	ALTO	P	25,000	$1.34	$33,500	700,575 Direct	+3.70%	Acquired	211.9% (price as of 2026-08-19)
June 20, 2024	ALTO	A	36,666	—	—	675,575 Direct	+5.74%	Acquired	(price as of 2026-08-19)
June 15, 2024	MX	A	39,157	—	—	156,043 Direct	+33.50%	Acquired	(price as of 2026-08-19)
May 24, 2024	RCD	P	10,000	$8.29	$82,900	95,249 Direct	+11.73%	Acquired	180.5% (price as of 2026-08-19)
March 22, 2024	RCD	P	7,000	$9.12	$63,840	7,000 Indirect	—	Acquired	154.9% (price as of 2026-08-19)
March 22, 2024	RCD	P	2,150	$9.13	$19,630	85,249 Direct	+2.59%	Acquired	154.7% (price as of 2026-08-19)
March 14, 2024	RCD	P	10,000	$8.65	$86,500	83,099 Direct	+13.68%	Acquired	168.8% (price as of 2026-08-19)
Feb. 22, 2024	RCD	A	12,693	—	—	73,099 Direct	+21.01%	Acquired	(price as of 2026-08-19)
Dec. 8, 2023	MX	P	10,000	$6.80	$68,000	78,200 Indirect	+14.66%	Acquired	-51.5% (price as of 2026-08-19)
Nov. 15, 2023	MX	A	3,222	—	—	116,886 Direct	+2.83%	Acquired	(price as of 2026-08-19)
Aug. 15, 2023	MX	P	10,000	$8.39	$83,900	68,200 Indirect	+17.18%	Acquired	-60.7% (price as of 2026-08-19)
June 22, 2023	ALTO	A	55,000	—	—	638,909 Direct	+9.42%	Acquired	(price as of 2026-08-19)
June 1, 2023	MX	A	17,479	—	—	113,664 Direct	+18.17%	Acquired	(price as of 2026-08-19)
June 1, 2023	ALTO	P	5,000	$1.97	$9,850	583,909 Direct	+0.86%	Acquired	112.2% (price as of 2026-08-19)
May 31, 2023	ALTO	P	5,000	$1.99	$9,950	578,909 Direct	+0.87%	Acquired	110.1% (price as of 2026-08-19)
March 17, 2023	ALTO	P	10,000	$1.71	$17,100	573,909 Direct	+1.77%	Acquired	144.4% (price as of 2026-08-19)
March 16, 2023	ALTO	P	10,000	$1.81	$18,100	563,909 Direct	+1.81%	Acquired	130.9% (price as of 2026-08-19)
March 15, 2023	ALTO	P	15,000	$1.86	$27,900	553,909 Direct	+2.78%	Acquired	124.7% (price as of 2026-08-19)
March 8, 2023	RCD	P	3,841	$11.05	$42,443	60,406 Direct	+6.79%	Acquired	110.4% (price as of 2026-08-19)
March 7, 2023	RCD	P	5,000	$10.95	$54,750	56,565 Direct	+9.70%	Acquired	112.3% (price as of 2026-08-19)
Feb. 12, 2023	RCD	A	8,860	—	—	51,565 Direct	+20.75%	Acquired	(price as of 2026-08-19)
Dec. 16, 2022	ALTO	P	35,000	$2.71	$94,850	538,909 Direct	+6.95%	Acquired	54.2% (price as of 2026-08-19)
June 23, 2022	ALTO	A	20,109	—	—	503,909 Direct	+4.16%	Acquired	(price as of 2026-08-19)
May 20, 2022	ALTO	P	20,000	$4.04	$80,800	483,800 Direct	+4.31%	Acquired	3.5% (price as of 2026-08-19)
Feb. 12, 2022	RCD	A	7,752	—	—	42,705 Direct	+22.18%	Acquired	(price as of 2026-08-19)
Dec. 8, 2021	ALTO	P	10,000	$4.96	$49,600	463,800 Direct	+2.20%	Acquired	-15.7% (price as of 2026-08-19)
Nov. 30, 2021	RCD	P	2,000	$15.29	$30,580	34,953 Direct	+6.07%	Acquired	52.1% (price as of 2026-08-19)
Nov. 29, 2021	RCD	P	1,000	$15.51	$15,510	32,953 Direct	+3.13%	Acquired	49.9% (price as of 2026-08-19)
Nov. 22, 2021	ALTO	P	5,000	$5.16	$25,800	453,800 Direct	+1.11%	Acquired	-19.0% (price as of 2026-08-19)
Nov. 19, 2021	ALTO	P	5,000	$5.13	$25,650	448,800 Direct	+1.13%	Acquired	-18.5% (price as of 2026-08-19)
Nov. 15, 2021	RCD	P	2,000	$15.84	$31,680	31,953 Direct	+6.68%	Acquired	46.8% (price as of 2026-08-19)
Nov. 15, 2021	ALTO	P	15,000	$5.47	$82,050	443,800 Direct	+3.50%	Acquired	-23.6% (price as of 2026-08-19)
Nov. 12, 2021	ALTO	P	10,000	$5.73	$57,300	428,800 Direct	+2.39%	Acquired	-27.1% (price as of 2026-08-19)
Aug. 30, 2021	ALTO	P	8,504	$4.85	$41,244	418,800 Direct	+2.07%	Acquired	-13.8% (price as of 2026-08-19)
Aug. 20, 2021	ALTO	P	6,000	$4.45	$26,700	410,296 Direct	+1.48%	Acquired	-6.1% (price as of 2026-08-19)
Aug. 13, 2021	ALTO	P	20,000	$4.96	$99,200	404,296 Direct	+5.20%	Acquired	-15.7% (price as of 2026-08-19)
Aug. 12, 2021	ALTO	P	5,000	$5.10	$25,500	384,296 Direct	+1.32%	Acquired	-18.0% (price as of 2026-08-19)
June 17, 2021	ALTO	A	32,736	—	—	379,296 Direct	+9.45%	Acquired	(price as of 2026-08-19)
June 11, 2021	ALTO	P	25,000	$6.08	$152,000	346,560 Direct	+7.77%	Acquired	-31.3% (price as of 2026-08-19)
June 10, 2021	ALTO	P	15,000	$6.15	$92,250	321,560 Direct	+4.89%	Acquired	-32.0% (price as of 2026-08-19)
May 24, 2021	RCD	P	3,000	$14.66	$43,980	29,953 Direct	+11.13%	Acquired	58.6% (price as of 2026-08-19)
May 19, 2021	ALTO	P	5,000	$5.38	$26,900	306,560 Direct	+1.66%	Acquired	-22.3% (price as of 2026-08-19)
May 18, 2021	ALTO	P	66,134	$5.65	$373,657	301,560 Direct	+28.09%	Acquired	-26.0% (price as of 2026-08-19)
May 17, 2021	ALTO	P	6,200	$5.09	$31,558	26,200 Indirect	+31.00%	Acquired	-17.9% (price as of 2026-08-19)
May 17, 2021	ALTO	P	7,325	$5.11	$37,431	235,426 Direct	+3.21%	Acquired	-18.2% (price as of 2026-08-19)
May 11, 2021	RCD	S	None	$51956.54	—	0 Direct	—	Disposed	-100.0% (price as of 2026-08-19)
May 11, 2021	RCD	P	4,000	$13.66	$54,640	26,953 Direct	+17.43%	Acquired	70.2% (price as of 2026-08-19)
Feb. 12, 2021	RCD	A	7,800	—	—	22,953 Direct	+51.47%	Acquired	(price as of 2026-08-19)
Dec. 10, 2020	ALTO	A	28,710	—	—	228,101 Direct	+14.40%	Acquired	(price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	3,811	$3.53	$13,453	20,000 Indirect	+23.54%	Acquired	18.4% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	16,089	$3.53	$56,794	16,189 Indirect	+16089.00%	Acquired	18.4% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	100	$3.52	$352	100 Indirect	—	Acquired	18.7% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	5,300	$3.53	$18,709	199,391 Direct	+2.73%	Acquired	18.4% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	5,000	$3.32	$16,600	194,091 Direct	+2.64%	Acquired	25.9% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	7,083	$3.31	$23,445	189,091 Direct	+3.89%	Acquired	26.3% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	100	$3.30	$330	182,008 Direct	+0.05%	Acquired	26.7% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	12,817	$3.30	$42,296	181,908 Direct	+7.58%	Acquired	26.7% (price as of 2026-08-19)
Aug. 26, 2020	ALTO	P	2,500	$3.37	$8,425	169,091 Direct	+1.50%	Acquired	24.0% (price as of 2026-08-19)
Aug. 25, 2020	ALTO	P	4,400	$4.00	$17,600	166,591 Direct	+2.71%	Acquired	4.5% (price as of 2026-08-19)
Aug. 25, 2020	ALTO	P	100	$4.00	$400	162,191 Direct	+0.06%	Acquired	4.5% (price as of 2026-08-19)
Aug. 25, 2020	ALTO	P	3,000	$3.99	$11,970	162,091 Direct	+1.89%	Acquired	4.8% (price as of 2026-08-19)
Aug. 25, 2020	ALTO	P	2,500	$4.02	$10,050	159,091 Direct	+1.60%	Acquired	4.0% (price as of 2026-08-19)
Aug. 24, 2020	ALTO	P	10,000	$3.83	$38,300	156,591 Direct	+6.82%	Acquired	9.1% (price as of 2026-08-19)
Aug. 14, 2020	ALTO	P	50,000	$3.42	$171,000	146,591 Direct	+51.76%	Acquired	22.2% (price as of 2026-08-19)
Aug. 13, 2020	ALTO	P	725	$3.22	$2,334	96,591 Direct	+0.76%	Acquired	29.8% (price as of 2026-08-19)
Aug. 13, 2020	ALTO	P	3,000	$3.22	$9,660	95,866 Direct	+3.23%	Acquired	29.8% (price as of 2026-08-19)
Aug. 13, 2020	ALTO	P	3,000	$3.18	$9,540	92,866 Direct	+3.34%	Acquired	31.4% (price as of 2026-08-19)
May 22, 2020	RCD	P	None	$8335.00	—	— Direct	—	Acquired	-99.7% (price as of 2026-08-19)
May 21, 2020	RCD	P	None	$16577.00	—	— Direct	—	Acquired	-99.9% (price as of 2026-08-19)
May 14, 2020	RCD	P	None	$7711.54	—	— Direct	—	Acquired	-99.7% (price as of 2026-08-19)
March 19, 2020	RCD	P	2,000	$5.94	$11,880	14,324 Direct	+16.23%	Acquired	291.4% (price as of 2026-08-19)
March 18, 2020	RCD	P	2,000	$5.37	$10,740	12,324 Direct	+19.37%	Acquired	333.0% (price as of 2026-08-19)
March 10, 2020	RCD	A	6,268	—	—	10,324 Direct	+154.54%	Acquired	(price as of 2026-08-19)
Nov. 18, 2019	ALTO	A	31,666	—	—	89,866 Direct	+54.41%	Acquired	(price as of 2026-08-19)
June 11, 2019	RCD	A	4,056	—	—	4,056 Direct	—	Acquired	(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
May 11, 2021	RCD	7.00% Convertible Senior Notes due 2023	Common stock	—	Aug. 11, 2023	—	Disposed
May 22, 2020	RCD	7.00% Convertible Senior Notes due 2023	Common Stock	—	Aug. 11, 2023	—	Acquired
May 21, 2020	RCD	7.00% Convertible Senior Notes due 2023	Common Stock	—	Aug. 11, 2023	—	Acquired
May 14, 2020	RCD	7.00% Convertible Senior Notes due 2023	Common Stock	—	Aug. 11, 2023	—	Acquired

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

Initial ownership (Form 3) 7 holdings

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

Date	Ticker	Security	Shares	Ownership
May 23, 2023	MX	Common Stock	96,185	Direct
May 23, 2023	MX	Common Stock	58,200	Indirect
May 23, 2023	MX	Common Stock	1,905	Indirect
May 23, 2023	MX	Common Stock	1,690	Indirect
May 23, 2023	MX	Common Stock	1,675	Indirect
May 23, 2023	MX	Common Stock	1,860	Indirect
Nov. 15, 2019	ALTO	Common Stock	58,200	Direct