Daniel R Herzog

Insider

First SEC filing: Jan. 5, 2026 · Latest: Jan. 5, 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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

CLFD selling Aug. 9, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 94 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

94 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 30, 2026	CLFD	A	752	$24.78	$18,635	85,834 Direct	+0.88%	Acquired	11.5% (price as of 2026-08-20)
Dec. 31, 2025	CLFD	A	88	$24.78	$2,181	85,082 Direct	+0.10%	Acquired	11.5% (price as of 2026-08-20)
Nov. 28, 2025	CLFD	A	11,495	—	—	84,994 Direct	+15.64%	Acquired	(price as of 2026-08-20)
Nov. 20, 2025	CLFD	F	824	$28.22	$23,253	73,499 Direct	-1.11%	Disposed	-2.1% (price as of 2026-08-20)
Nov. 20, 2025	CLFD	A	5,394	—	—	74,323 Direct	+7.83%	Acquired	(price as of 2026-08-20)
Nov. 20, 2025	CLFD	A	2,696	—	—	68,929 Direct	+4.07%	Acquired	(price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	825	$30.72	$25,344	66,233 Direct	-1.23%	Disposed	-10.0% (price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	973	$30.72	$29,891	67,058 Direct	-1.43%	Disposed	-10.0% (price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	510	$30.72	$15,667	68,031 Direct	-0.74%	Disposed	-10.0% (price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	825	$30.72	$25,344	66,233 Direct	+1.26%	Acquired	-10.0% (price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	973	$30.72	$29,891	67,058 Direct	+1.47%	Acquired	-10.0% (price as of 2026-08-20)
Nov. 16, 2025	CLFD	F	510	$30.72	$15,667	68,031 Direct	-0.74%	Disposed	-10.0% (price as of 2026-08-20)
Sept. 12, 2025	CLFD	M	12,000	—	—	5,837 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 12, 2025	CLFD	M	11,795	—	—	17,632 Direct	+202.07%	Acquired	(price as of 2026-08-20)
Sept. 12, 2025	CLFD	F	6,785	$33.25	$225,601	68,541 Direct	-9.01%	Disposed	-16.9% (price as of 2026-08-20)
Sept. 12, 2025	CLFD	M	12,000	$12.43	$149,160	75,326 Direct	+18.95%	Acquired	122.4% (price as of 2026-08-20)
Sept. 12, 2025	CLFD	F	9,453	$33.25	$314,312	63,326 Direct	-12.99%	Disposed	-16.9% (price as of 2026-08-20)
Sept. 12, 2025	CLFD	M	11,795	$23.74	$280,013	72,779 Direct	+19.34%	Acquired	16.4% (price as of 2026-08-20)
June 30, 2025	CLFD	A	683	$26.35	$17,997	60,984 Direct	+1.13%	Acquired	4.9% (price as of 2026-08-20)
Dec. 31, 2024	CLFD	A	137	$26.35	$3,610	60,301 Direct	+0.23%	Acquired	4.9% (price as of 2026-08-20)
Nov. 26, 2024	CLFD	A	8,090	—	—	60,164 Direct	+15.54%	Acquired	(price as of 2026-08-20)
Nov. 16, 2024	CLFD	F	973	$28.26	$27,497	52,074 Direct	-1.83%	Disposed	-2.2% (price as of 2026-08-20)
Nov. 16, 2024	CLFD	F	510	$28.26	$14,413	53,047 Direct	-0.95%	Disposed	-2.2% (price as of 2026-08-20)
Nov. 16, 2024	CLFD	F	114	$28.26	$3,222	53,557 Direct	-0.21%	Disposed	-2.2% (price as of 2026-08-20)
Aug. 21, 2024	CLFD	F	458	$37.58	$17,212	53,671 Direct	-0.85%	Disposed	-26.5% (price as of 2026-08-20)
June 30, 2024	CLFD	A	688	$24.72	$17,007	54,129 Direct	+1.29%	Acquired	11.8% (price as of 2026-08-20)
Dec. 31, 2023	CLFD	A	206	$24.72	$5,092	53,441 Direct	+0.39%	Acquired	11.8% (price as of 2026-08-20)
Nov. 16, 2023	CLFD	A	9,549	—	—	53,235 Direct	+21.86%	Acquired	(price as of 2026-08-20)
Nov. 16, 2023	CLFD	F	509	$26.18	$13,326	43,686 Direct	-1.15%	Disposed	5.6% (price as of 2026-08-20)
Nov. 16, 2023	CLFD	F	114	$26.18	$2,985	44,195 Direct	-0.26%	Disposed	5.6% (price as of 2026-08-20)
Nov. 16, 2023	CLFD	F	206	$26.18	$5,393	44,309 Direct	-0.46%	Disposed	5.6% (price as of 2026-08-20)
Aug. 21, 2023	CLFD	F	459	$37.50	$17,212	44,515 Direct	-1.02%	Disposed	-26.3% (price as of 2026-08-20)
June 30, 2023	CLFD	A	140	$40.25	$5,635	45,072 Direct	+0.31%	Acquired	-31.3% (price as of 2026-08-20)
Feb. 24, 2023	CLFD	A	5,000	—	—	44,932 Direct	+12.52%	Acquired	(price as of 2026-08-20)
Dec. 31, 2022	CLFD	A	232	$53.52	$12,417	39,932 Direct	+0.58%	Acquired	-48.4% (price as of 2026-08-20)
Dec. 14, 2022	CLFD	F	424	$104.36	$44,249	39,700 Direct	-1.06%	Disposed	-73.5% (price as of 2026-08-20)
Dec. 14, 2022	CLFD	A	1,386	—	—	40,124 Direct	+3.58%	Acquired	(price as of 2026-08-20)
Nov. 16, 2022	CLFD	F	184	$92.48	$17,016	38,738 Direct	-0.47%	Disposed	-70.1% (price as of 2026-08-20)
Nov. 16, 2022	CLFD	F	331	$92.48	$30,611	38,922 Direct	-0.84%	Disposed	-70.1% (price as of 2026-08-20)
Aug. 21, 2022	CLFD	F	738	$123.45	$91,106	39,253 Direct	-1.85%	Disposed	-77.6% (price as of 2026-08-20)
Aug. 9, 2022	CLFD	S	4,534	$113.56	$514,881	40,072 Direct	-10.16%	Disposed	-75.7% (price as of 2026-08-20)
Aug. 8, 2022	CLFD	M	10,000	—	—	29,632 Direct	-25.23%	Disposed	(price as of 2026-08-20)
Aug. 8, 2022	CLFD	F	5,466	$112.38	$614,269	44,606 Direct	-10.92%	Disposed	-75.4% (price as of 2026-08-20)
Aug. 8, 2022	CLFD	M	10,000	$12.17	$121,700	50,072 Direct	+24.96%	Acquired	127.1% (price as of 2026-08-20)
June 30, 2022	CLFD	A	47	$52.66	$2,475	40,072 Direct	+0.12%	Acquired	-47.5% (price as of 2026-08-20)
Dec. 31, 2021	CLFD	A	81	$32.43	$2,627	40,025 Direct	+0.20%	Acquired	-14.8% (price as of 2026-08-20)
Dec. 31, 2021	CLFD	A	82	$31.83	$2,610	40,026 Direct	+0.21%	Acquired	-13.2% (price as of 2026-08-20)
Nov. 16, 2021	CLFD	A	5,837	—	—	39,632 Direct	+17.27%	Acquired	(price as of 2026-08-20)
Nov. 16, 2021	CLFD	A	1,121	—	—	39,944 Direct	+2.89%	Acquired	(price as of 2026-08-20)
Nov. 16, 2021	CLFD	F	206	$66.48	$13,695	38,823 Direct	-0.53%	Disposed	-58.4% (price as of 2026-08-20)
Aug. 21, 2021	CLFD	F	727	$42.78	$31,101	39,029 Direct	-1.83%	Disposed	-35.4% (price as of 2026-08-20)
June 30, 2021	CLFD	A	114	$21.01	$2,395	39,850 Direct	+0.29%	Acquired	31.6% (price as of 2026-08-20)
Dec. 31, 2020	CLFD	A	190	$11.93	$2,267	39,736 Direct	+0.48%	Acquired	131.7% (price as of 2026-08-20)
Nov. 27, 2020	CLFD	M	14,000	—	—	33,795 Direct	-29.29%	Disposed	(price as of 2026-08-20)
Nov. 27, 2020	CLFD	F	9,995	$23.33	$233,183	39,546 Direct	-20.18%	Disposed	18.5% (price as of 2026-08-20)
Nov. 27, 2020	CLFD	M	14,000	$12.17	$170,380	49,541 Direct	+39.39%	Acquired	127.1% (price as of 2026-08-20)
Nov. 27, 2020	CLFD	S	2,000	$23.08	$46,160	35,541 Direct	-5.33%	Disposed	19.8% (price as of 2026-08-20)
Nov. 25, 2020	CLFD	S	5,000	$23.51	$117,550	37,541 Direct	-11.75%	Disposed	17.6% (price as of 2026-08-20)
Nov. 16, 2020	CLFD	A	2,022	—	—	42,541 Direct	+4.99%	Acquired	(price as of 2026-08-20)
Nov. 16, 2020	CLFD	A	11,795	—	—	47,795 Direct	+32.76%	Acquired	(price as of 2026-08-20)
Aug. 21, 2020	CLFD	F	724	$17.80	$12,887	40,519 Direct	-1.76%	Disposed	55.3% (price as of 2026-08-20)
June 30, 2020	CLFD	A	205	$11.85	$2,429	41,353 Direct	+0.50%	Acquired	133.2% (price as of 2026-08-20)
Dec. 31, 2019	CLFD	A	277	$11.23	$3,111	41,148 Direct	+0.68%	Acquired	146.1% (price as of 2026-08-20)
Nov. 13, 2019	CLFD	A	12,000	—	—	36,000 Direct	+50.00%	Acquired	(price as of 2026-08-20)
Aug. 21, 2019	CLFD	F	728	$11.55	$8,408	41,002 Direct	-1.74%	Disposed	139.3% (price as of 2026-08-20)
June 30, 2019	CLFD	A	522	$8.43	$4,400	41,730 Direct	+1.27%	Acquired	227.9% (price as of 2026-08-20)
May 26, 2019	CLFD	F	2,228	$14.19	$31,615	41,208 Direct	-5.13%	Disposed	94.8% (price as of 2026-08-20)
Dec. 31, 2018	CLFD	A	119	$8.43	$1,003	43,436 Direct	+0.27%	Acquired	227.9% (price as of 2026-08-20)
Nov. 14, 2018	CLFD	A	24,000	—	—	24,000 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 21, 2018	CLFD	F	729	$13.03	$9,499	43,317 Direct	-1.66%	Disposed	112.1% (price as of 2026-08-20)
June 30, 2018	CLFD	A	106	$9.39	$995	44,209 Direct	+0.24%	Acquired	194.3% (price as of 2026-08-20)
May 26, 2018	CLFD	F	2,175	$11.10	$24,142	44,103 Direct	-4.70%	Disposed	149.0% (price as of 2026-08-20)
Dec. 31, 2017	CLFD	A	97	$10.41	$1,010	46,278 Direct	+0.21%	Acquired	165.5% (price as of 2026-08-20)
Aug. 23, 2017	CLFD	F	3,108	$11.58	$35,991	46,181 Direct	-6.31%	Disposed	138.7% (price as of 2026-08-20)
Aug. 21, 2017	CLFD	F	777	$13.60	$10,567	50,356 Direct	-1.52%	Disposed	103.2% (price as of 2026-08-20)
June 30, 2017	CLFD	A	89	$11.22	$999	50,867 Direct	+0.18%	Acquired	146.3% (price as of 2026-08-20)
May 26, 2017	CLFD	F	2,061	$13.88	$28,607	50,778 Direct	-3.90%	Disposed	99.1% (price as of 2026-08-20)
Dec. 31, 2016	CLFD	A	69	$15.21	$1,049	70,362 Direct	+0.10%	Acquired	81.7% (price as of 2026-08-20)
Nov. 22, 2016	CLFD	S	10,608	$18.88	$200,279	70,293 Direct	-13.11%	Disposed	46.4% (price as of 2026-08-20)
Nov. 21, 2016	CLFD	S	14,392	$19.61	$282,227	80,901 Direct	-15.10%	Disposed	40.9% (price as of 2026-08-20)
Nov. 18, 2016	CLFD	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 18, 2016	CLFD	F	1,717	$19.21	$32,984	95,293 Direct	-1.77%	Disposed	43.9% (price as of 2026-08-20)
Nov. 18, 2016	CLFD	M	10,000	$3.30	$33,000	97,010 Direct	+11.49%	Acquired	737.5% (price as of 2026-08-20)
Aug. 25, 2016	CLFD	M	20,000	—	—	10,000 Direct	-66.67%	Disposed	(price as of 2026-08-20)
Aug. 25, 2016	CLFD	F	7,142	$17.81	$127,199	87,010 Direct	-7.59%	Disposed	55.2% (price as of 2026-08-20)
Aug. 25, 2016	CLFD	M	20,000	$6.36	$127,200	94,152 Direct	+26.97%	Acquired	334.6% (price as of 2026-08-20)
Aug. 23, 2016	CLFD	F	1,975	$18.01	$35,570	74,152 Direct	-2.59%	Disposed	53.5% (price as of 2026-08-20)
Aug. 21, 2016	CLFD	F	503	$18.07	$9,089	76,127 Direct	-0.66%	Disposed	53.0% (price as of 2026-08-20)
June 30, 2016	CLFD	A	154	$11.40	$1,756	76,630 Direct	+0.20%	Acquired	142.4% (price as of 2026-08-20)
May 26, 2016	CLFD	A	17,094	—	—	76,476 Direct	+28.79%	Acquired	(price as of 2026-08-20)
Feb. 29, 2016	CLFD	S	4,000	$14.69	$58,760	59,382 Direct	-6.31%	Disposed	88.1% (price as of 2026-08-20)
Dec. 31, 2015	CLFD	A	172	$11.40	$1,961	63,382 Direct	+0.27%	Acquired	142.4% (price as of 2026-08-20)
Aug. 23, 2015	CLFD	F	1,974	$16.89	$33,341	63,210 Direct	-3.03%	Disposed	63.6% (price as of 2026-08-20)
Aug. 21, 2015	CLFD	F	504	$17.03	$8,583	65,184 Direct	-0.77%	Disposed	62.3% (price as of 2026-08-20)
June 30, 2015	CLFD	A	168	$10.46	$1,757	65,688 Direct	+0.26%	Acquired	164.2% (price as of 2026-08-20)
Feb. 18, 2015	CLFD	M	15,000	—	—	30,000 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Feb. 18, 2015	CLFD	M	5,000	—	—	45,000 Direct	-10.00%	Disposed	(price as of 2026-08-20)
Feb. 18, 2015	CLFD	F	3,713	$13.33	$49,494	65,520 Direct	-5.36%	Disposed	107.3% (price as of 2026-08-20)
Feb. 18, 2015	CLFD	M	15,000	$3.30	$49,500	69,233 Direct	+27.66%	Acquired	737.5% (price as of 2026-08-20)
Feb. 18, 2015	CLFD	M	5,000	$2.58	$12,900	54,233 Direct	+10.16%	Acquired	971.3% (price as of 2026-08-20)

Showing latest 100 of 119 transactions

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
Sept. 12, 2025	CLFD	Employee Stock Option (Right to buy)	Common Stock (12,000)	$12.43	Nov. 13, 2025	12,000	Acquired
Sept. 12, 2025	CLFD	Employee Stock Option (Right to buy)	Common Stock (11,795)	$23.74	Nov. 16, 2025	11,795	Acquired
Aug. 8, 2022	CLFD	Employee Stock Option (Right to buy)	Common Stock (10,000)	$12.17	Nov. 14, 2022	10,000	Disposed
Nov. 16, 2021	CLFD	Option to Purchase Common Stock	Common Stock (5,837)	$66.48	Nov. 16, 2026	5,837	Acquired
Nov. 27, 2020	CLFD	Employee Stock Option (Right to Buy)	Common Stock (14,000)	$12.17	Nov. 14, 2022	14,000	Disposed
Nov. 16, 2020	CLFD	Option to Purchase Common Stock	Common Stock (11,795)	$23.74	Nov. 16, 2025	11,795	Acquired
Nov. 13, 2019	CLFD	Option to purchase common stock	Common Stock (12,000)	$12.43	Nov. 13, 2025	12,000	Acquired
Nov. 14, 2018	CLFD	Option to Purchase Common Stock	Common Stock (24,000)	$12.17	Nov. 14, 2022	24,000	Acquired
Nov. 18, 2016	CLFD	Employee Stock Option (Right to Buy)	Common Stock (10,000)	$3.30	Nov. 20, 2016	10,000	Disposed
Aug. 25, 2016	CLFD	Employee Stock Option (Right to Buy)	Common Stock (20,000)	$6.36	Aug. 25, 2016	20,000	Disposed
Feb. 18, 2015	CLFD	Employee Stock Option (Right to Buy)	Common Stock (15,000)	$3.30	Nov. 20, 2016	15,000	Disposed
Feb. 18, 2015	CLFD	Employee Stock Option (Right to Buy)	Common Stock (5,000)	$2.58	Aug. 19, 2020	5,000	Disposed
Aug. 25, 2011	CLFD	Option to Purchase Common Stock	Common Stock (20,000)	$6.36	Aug. 25, 2016	20,000	Acquired
Oct. 30, 2003	CLFD	Incentive Stock Options	Common Stock (20,000)	$2.55	Oct. 30, 2009	20,000	Acquired

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

Initial ownership (Form 3) 3 holdings

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

Date	Ticker	Security	Shares	Ownership
March 3, 2011	CLFD	Common Stock	244	Direct
March 3, 2011	CLFD	Option to Purchase Common Shares→ Common Stock (25,000)	25,000	Direct
Sept. 4, 2003	CLFD	None	0	Direct

Compensation (DEF 14A)

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

CLFD

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$360,400	—	$499,962	—	$103,036	—	$17,182	$980,580
2024	$340,000	$112,200	$499,986	—	—	—	$14,816	$967,002
2023	$340,000	—	$307,800	—	—	—	$18,592	$666,392

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