Katharine Weymouth

Insider

First SEC filing: Nov. 14, 2024 · Latest: Nov. 14, 2024

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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

1 buys (P) 0 sells (S) Net: $100,122 + 64 non-open-market transactions below Avg return of open purchases vs now: 4.9% 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

64 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 15, 2026	RSG	A	11	$217.34	$2,391	3,715 Direct	+0.30%	Acquired	1.1% (price as of 2026-08-21)
May 26, 2026	GHC	J	6,000	—	—	30,000 Direct	-16.67%	Disposed	(price as of 2026-08-21)
May 26, 2026	GHC	J	6,000	—	—	7,615 Direct	+371.52%	Acquired	(price as of 2026-08-21)
April 15, 2026	RSG	A	11	$210.87	$2,320	3,704 Direct	+0.30%	Acquired	4.2% (price as of 2026-08-21)
Jan. 2, 2026	RSG	A	1,095	—	—	1,095 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 29, 2025	GHC	J	36,000	—	—	36,000 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 9, 2025	RSG	P	478	$209.46	$100,122	5,740 Direct	+9.08%	Acquired	4.9% (price as of 2026-08-21)
Oct. 15, 2025	RSG	A	12	$221.03	$2,652	4,440 Direct	+0.27%	Acquired	-0.6% (price as of 2026-08-21)
July 15, 2025	RSG	A	10	$241.86	$2,419	4,428 Direct	+0.23%	Acquired	-9.1% (price as of 2026-08-21)
April 15, 2025	RSG	A	10	$245.00	$2,450	4,418 Direct	+0.23%	Acquired	-10.3% (price as of 2026-08-21)
Jan. 31, 2025	RSG	M	2,608	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 31, 2025	RSG	M	1,775	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 31, 2025	RSG	M	2,608	—	—	5,262 Direct	+98.27%	Acquired	(price as of 2026-08-21)
Jan. 31, 2025	RSG	M	1,775	—	—	2,654 Direct	+201.93%	Acquired	(price as of 2026-08-21)
Jan. 15, 2025	RSG	A	24	$209.76	$5,034	8,791 Direct	+0.27%	Acquired	4.8% (price as of 2026-08-21)
Jan. 2, 2025	RSG	A	1,150	—	—	1,150 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 5, 2024	RSG	S	1,859	$215.27	$400,187	879 Direct	-67.90%	Disposed	2.1% (price as of 2026-08-21)
Nov. 13, 2024	GHC	S	378	$949.26	$358,820	1,615 Direct	-18.97%	Disposed	28.8% (price as of 2026-08-21)
Oct. 15, 2024	RSG	A	21	$206.49	$4,336	7,617 Direct	+0.28%	Acquired	6.4% (price as of 2026-08-21)
July 15, 2024	RSG	A	21	$201.19	$4,225	7,596 Direct	+0.28%	Acquired	9.2% (price as of 2026-08-21)
June 4, 2024	RSG	P	540	$185.26	$100,040	540 Indirect	—	Acquired	18.6% (price as of 2026-08-21)
April 15, 2024	RSG	A	21	$187.24	$3,932	7,575 Direct	+0.28%	Acquired	17.4% (price as of 2026-08-21)
Jan. 31, 2024	RSG	M	2,738	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 31, 2024	RSG	M	2,738	—	—	2,738 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 16, 2024	RSG	A	34	$165.64	$5,632	10,292 Direct	+0.33%	Acquired	32.7% (price as of 2026-08-21)
Jan. 2, 2024	RSG	A	1,395	—	—	1,395 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 13, 2023	RSG	A	32	$147.35	$4,715	8,863 Direct	+0.36%	Acquired	49.2% (price as of 2026-08-21)
July 14, 2023	RSG	A	29	$149.98	$4,349	8,831 Direct	+0.33%	Acquired	46.5% (price as of 2026-08-21)
April 14, 2023	RSG	A	31	$137.37	$4,258	8,802 Direct	+0.35%	Acquired	60.0% (price as of 2026-08-21)
March 16, 2023	RSG	S	1,504	$133.55	$200,859	0 Direct	-100.00%	Disposed	64.6% (price as of 2026-08-21)
March 16, 2023	RSG	S	2,800	$133.57	$373,996	1,504 Direct	-65.06%	Disposed	64.5% (price as of 2026-08-21)
Jan. 31, 2023	RSG	M	3,456	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 31, 2023	RSG	M	3,456	—	—	4,304 Direct	+407.55%	Acquired	(price as of 2026-08-21)
Jan. 13, 2023	RSG	A	49	$124.89	$6,120	12,227 Direct	+0.40%	Acquired	76.0% (price as of 2026-08-21)
Jan. 3, 2023	RSG	A	1,788	—	—	1,788 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 14, 2022	RSG	A	40	$127.45	$5,098	10,390 Direct	+0.39%	Acquired	72.4% (price as of 2026-08-21)
July 15, 2022	RSG	A	37	$129.00	$4,773	10,350 Direct	+0.36%	Acquired	70.4% (price as of 2026-08-21)
April 14, 2022	RSG	A	36	$132.71	$4,778	10,313 Direct	+0.35%	Acquired	65.6% (price as of 2026-08-21)
Jan. 14, 2022	RSG	A	36	$129.86	$4,675	10,277 Direct	+0.35%	Acquired	69.2% (price as of 2026-08-21)
Jan. 3, 2022	RSG	A	1,699	—	—	1,699 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 10, 2021	XMTR	P	1,200	$49.10	$58,920	1,562 Direct	+331.49%	Acquired	66.8% (price as of 2026-08-21)
Oct. 31, 2021	RSG	M	848	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Oct. 31, 2021	RSG	M	848	—	—	848 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 15, 2021	RSG	A	34	$127.73	$4,343	9,390 Direct	+0.36%	Acquired	72.1% (price as of 2026-08-21)
July 20, 2021	XMTR	A	362	—	—	362 Direct	—	Acquired	(price as of 2026-08-21)
July 15, 2021	RSG	A	34	$114.53	$3,894	9,356 Direct	+0.36%	Acquired	91.9% (price as of 2026-08-21)
July 2, 2021	XMTR	J	70,000	—	—	70,000 Direct	—	Acquired	(price as of 2026-08-21)
July 2, 2021	XMTR	J	70,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
April 15, 2021	RSG	A	38	$104.21	$3,960	9,322 Direct	+0.41%	Acquired	110.9% (price as of 2026-08-21)
Jan. 15, 2021	RSG	A	42	$93.81	$3,940	9,284 Direct	+0.45%	Acquired	134.3% (price as of 2026-08-21)
Jan. 4, 2021	RSG	A	2,459	—	—	2,459 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 15, 2020	RSG	A	31	$93.42	$2,896	6,783 Direct	+0.46%	Acquired	135.3% (price as of 2026-08-21)
Aug. 25, 2020	GHC	S	1,100	$414.73	$456,203	2,549 Direct	-30.15%	Disposed	194.8% (price as of 2026-08-21)
July 15, 2020	RSG	A	32	$84.30	$2,698	6,752 Direct	+0.48%	Acquired	160.7% (price as of 2026-08-21)
April 15, 2020	RSG	A	35	$77.00	$2,695	6,720 Direct	+0.52%	Acquired	185.4% (price as of 2026-08-21)
Jan. 15, 2020	RSG	A	29	$92.56	$2,684	6,685 Direct	+0.44%	Acquired	137.5% (price as of 2026-08-21)
Jan. 2, 2020	RSG	A	2,561	—	—	2,561 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 15, 2019	RSG	A	19	$86.09	$1,636	4,095 Direct	+0.47%	Acquired	155.3% (price as of 2026-08-21)
July 15, 2019	RSG	A	17	$87.30	$1,484	4,076 Direct	+0.42%	Acquired	151.8% (price as of 2026-08-21)
April 15, 2019	RSG	A	19	$79.08	$1,503	4,059 Direct	+0.47%	Acquired	177.9% (price as of 2026-08-21)
Jan. 15, 2019	RSG	A	20	$74.88	$1,498	4,040 Direct	+0.50%	Acquired	193.5% (price as of 2026-08-21)
Jan. 2, 2019	RSG	A	3,216	—	—	3,216 Direct	—	Acquired	(price as of 2026-08-21)
Oct. 15, 2018	RSG	A	4	$70.58	$282	804 Direct	+0.50%	Acquired	211.4% (price as of 2026-08-21)
Oct. 9, 2018	GHC	S	1,100	$579.95	$637,945	3,649 Direct	-23.16%	Disposed	110.8% (price as of 2026-08-21)
Oct. 1, 2018	RSG	A	800	—	—	800 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 21, 2018	GHC	S	700	$590.28	$413,196	4,749 Direct	-12.85%	Disposed	107.1% (price as of 2026-08-21)
July 5, 2018	GHC	S	100	$596.25	$59,625	10,620 Direct	-0.93%	Disposed	105.0% (price as of 2026-08-21)
July 5, 2018	GHC	S	1,001	$595.00	$595,595	10,720 Direct	-8.54%	Disposed	105.5% (price as of 2026-08-21)
May 11, 2018	GHC	S	40	$600.00	$24,000	11,721 Direct	-0.34%	Disposed	103.8% (price as of 2026-08-21)
May 11, 2018	GHC	S	949	$601.48	$570,805	11,761 Direct	-7.47%	Disposed	103.3% (price as of 2026-08-21)
May 11, 2018	GHC	S	11	$602.73	$6,630	12,710 Direct	-0.09%	Disposed	102.8% (price as of 2026-08-21)
May 11, 2018	GHC	S	500	$603.79	$301,895	12,721 Direct	-3.78%	Disposed	102.5% (price as of 2026-08-21)
Dec. 15, 2017	GHC	S	529	$564.85	$298,806	13,221 Direct	-3.85%	Disposed	116.4% (price as of 2026-08-21)
Dec. 14, 2017	GHC	S	45	$563.00	$25,335	13,750 Direct	-0.33%	Disposed	117.2% (price as of 2026-08-21)
Dec. 14, 2017	GHC	S	926	$566.06	$524,172	14 Direct	-98.51%	Disposed	116.0% (price as of 2026-08-21)
May 3, 2017	CABO	M	325	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 3, 2017	CABO	M	325	—	—	5,046 Direct	+6.88%	Acquired	(price as of 2026-08-21)
May 2, 2017	CABO	A	184	—	—	184 Direct	—	Acquired	(price as of 2026-08-21)
March 6, 2017	CABO	S	1,562	$625.07	$976,359	8,159 Direct	-16.07%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	864	$626.34	$541,158	7,295 Direct	-10.59%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	563	$627.55	$353,311	6,732 Direct	-7.72%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	139	$628.66	$87,384	6,593 Direct	-2.06%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	658	$629.27	$414,060	5,935 Direct	-9.98%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	578	$630.00	$364,140	5,357 Direct	-9.74%	Disposed	-95.9% (price as of 2026-08-21)
March 6, 2017	CABO	S	636	$631.10	$401,380	4,721 Direct	-11.87%	Disposed	-95.9% (price as of 2026-08-21)
May 24, 2016	CABO	S	430	$484.92	$208,516	9,721 Direct	-4.24%	Disposed	-94.7% (price as of 2026-08-21)
May 3, 2016	CABO	A	325	—	—	325 Direct	—	Acquired	(price as of 2026-08-21)
May 3, 2016	CABO	M	430	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 3, 2016	CABO	M	430	—	—	10,151 Direct	+4.42%	Acquired	(price as of 2026-08-21)
March 24, 2016	CABO	S	841	$435.03	$365,860	9,721 Direct	-7.96%	Disposed	-94.1% (price as of 2026-08-21)
March 22, 2016	CABO	S	300	$440.29	$132,087	10,562 Direct	-2.76%	Disposed	-94.2% (price as of 2026-08-21)
March 21, 2016	CABO	S	401	$440.00	$176,440	10,862 Direct	-3.56%	Disposed	-94.2% (price as of 2026-08-21)
March 17, 2016	CABO	S	79	$440.00	$34,760	11,263 Direct	-0.70%	Disposed	-94.2% (price as of 2026-08-21)
March 16, 2016	CABO	S	242	$440.00	$106,480	11,342 Direct	-2.09%	Disposed	-94.2% (price as of 2026-08-21)
March 15, 2016	CABO	S	637	$440.01	$280,286	11,584 Direct	-5.21%	Disposed	-94.2% (price as of 2026-08-21)
March 4, 2016	CABO	A	1	—	—	430 Direct	+0.23%	Acquired	(price as of 2026-08-21)
Dec. 17, 2015	CABO	S	92	$437.78	$40,276	12,221 Direct	-0.75%	Disposed	-94.1% (price as of 2026-08-21)
Dec. 17, 2015	CABO	S	752	$435.00	$327,120	12,313 Direct	-5.76%	Disposed	-94.1% (price as of 2026-08-21)
Dec. 17, 2015	CABO	S	100	$432.11	$43,211	13,065 Direct	-0.76%	Disposed	-94.1% (price as of 2026-08-21)
Dec. 4, 2015	CABO	A	1	—	—	429 Direct	+0.23%	Acquired	(price as of 2026-08-21)

Showing latest 100 of 135 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
July 15, 2026	RSG	Restricted Stock Units	Common Stock (11)	—	—	11	Acquired
May 26, 2026	GHC	Class A Common Stock	Class B Common Stock (6,000)	—	—	6,000	Disposed
April 15, 2026	RSG	Restricted Stock Units	Common Stock (11)	—	—	11	Acquired
Jan. 2, 2026	RSG	Restricted Stock Units	Common Stock (1,095)	—	—	1,095	Acquired
Dec. 29, 2025	GHC	Class A Common Stock	Class B Common Stock (36,000)	—	—	36,000	Acquired
Oct. 15, 2025	RSG	Restricted Stock Units	Common Stock (12)	—	—	12	Acquired
July 15, 2025	RSG	Restricted Stock Units	Common Stock (10)	—	—	10	Acquired
April 15, 2025	RSG	Restricted Stock Units	Common Stock (10)	—	—	10	Acquired
Jan. 31, 2025	RSG	Restricted Stock Units	Common Stock (2,608)	—	—	2,608	Disposed
Jan. 31, 2025	RSG	Restricted Stock Units	Common Stock (1,775)	—	—	1,775	Disposed
Jan. 15, 2025	RSG	Restricted Stock Units	Common Stock (24)	—	—	24	Acquired
Jan. 2, 2025	RSG	Restricted Stock Units	Common Stock (1,150)	—	—	1,150	Acquired
Oct. 15, 2024	RSG	Restricted Stock Units	Common Stock (21)	—	—	21	Acquired
July 15, 2024	RSG	Restricted Stock Units	Common Stock (21)	—	—	21	Acquired
April 15, 2024	RSG	Restricted Stock Units	Common Stock (21)	—	—	21	Acquired
Jan. 31, 2024	RSG	Restricted Stock Units	Common Stock (2,738)	—	—	2,738	Disposed
Jan. 16, 2024	RSG	Restricted Stock Units	Common Stock (34)	—	—	34	Acquired
Jan. 2, 2024	RSG	Restricted Stock Units	Common Stock (1,395)	—	—	1,395	Acquired
Oct. 13, 2023	RSG	Restricted Stock Units	Common Stock (32)	—	—	32	Acquired
July 14, 2023	RSG	Restricted Stock Units	Common Stock (29)	—	—	29	Acquired
April 14, 2023	RSG	Restricted Stock Units	Common Stock (31)	—	—	31	Acquired
Jan. 31, 2023	RSG	Restricted Stock Units	Common Stock (3,456)	—	—	3,456	Disposed
Jan. 13, 2023	RSG	Restricted Stock Units	Common Stock (49)	—	—	49	Acquired
Jan. 3, 2023	RSG	Restricted Stock Units	Common Stock (1,788)	—	—	1,788	Acquired
Oct. 14, 2022	RSG	Restricted Stock Units	Common Stock (40)	—	—	40	Acquired
July 15, 2022	RSG	Restricted Stock Units	Common Stock (37)	—	—	37	Acquired
April 14, 2022	RSG	Restricted Stock Units	Common Stock (36)	—	—	36	Acquired
Jan. 14, 2022	RSG	Restricted Stock Units	Common Stock (36)	—	—	36	Acquired
Jan. 3, 2022	RSG	Restricted Stock Units	Common Stock (1,699)	—	—	1,699	Acquired
Oct. 31, 2021	RSG	Restricted Stock Units	Common Stock (848)	—	—	848	Disposed
Oct. 15, 2021	RSG	Restricted Stock Units	Common Stock (34)	—	—	34	Acquired
July 15, 2021	RSG	Restricted Stock Units	Common Stock (34)	—	—	34	Acquired
July 2, 2021	XMTR	Stock Option (right to buy)	Class A Common Stock (70,000)	$4.46	Oct. 6, 2030	70,000	Acquired
July 2, 2021	XMTR	Stock Option (right to buy)	Common Stock [F2] (70,000)	$4.46	Oct. 6, 2030	70,000	Disposed
April 15, 2021	RSG	Restricted Stock Units	Common Stock (38)	—	—	38	Acquired
Jan. 15, 2021	RSG	Restricted Stock Units	Common Stock (42)	—	—	42	Acquired
Jan. 4, 2021	RSG	Restricted Stock Units	Common Stock (2,459)	—	—	2,459	Acquired
Oct. 15, 2020	RSG	Restricted Stock Units	Common Stock (31)	—	—	31	Acquired
July 15, 2020	RSG	Restricted Stock Units	Common Stock (32)	—	—	32	Acquired
April 15, 2020	RSG	Restricted Stock Units	Common Stock (35)	—	—	35	Acquired
Jan. 15, 2020	RSG	Restricted Stock Units	Common Stock (29)	—	—	29	Acquired
Jan. 2, 2020	RSG	Restricted Stock Units	Common Stock (2,561)	—	—	2,561	Acquired
Oct. 15, 2019	RSG	Restricted Stock Units	Common Stock (19)	—	—	19	Acquired
July 15, 2019	RSG	Restricted Stock Units	Common Stock (17)	—	—	17	Acquired
April 15, 2019	RSG	Restricted Stock Units	Common Stock (19)	—	—	19	Acquired
Jan. 15, 2019	RSG	Restricted Stock Units	Common Stock (20)	—	—	20	Acquired
Jan. 2, 2019	RSG	Restricted Stock Units	Common Stock (3,216)	—	—	3,216	Acquired
Oct. 15, 2018	RSG	Restricted Stock Units	Common Stock (4)	—	—	4	Acquired
Oct. 1, 2018	RSG	Restricted Stock Units	Common Stock (800)	—	—	800	Acquired
May 3, 2017	CABO	Restricted Stock Unit (RSU)	Common Stock; par value $0.01 (325)	—	—	325	Disposed
May 2, 2017	CABO	Restricted Stock Unit (RSU)	Common Stock; par value $0.01 (184)	—	—	184	Acquired
May 3, 2016	CABO	Restricted Stock Unit (RSU)	Common Stock; par value $0.01 (325)	—	—	325	Acquired
May 3, 2016	CABO	Restricted Stock Units (RSU)	Common Stock; par value $0.01 (430)	—	—	430	Disposed
March 4, 2016	CABO	Restricted Stock Unit (RSU) [F1]	Common Stock; par value $0.01 (1)	—	—	1	Acquired
Dec. 4, 2015	CABO	Restricted Stock Unit (RSU) [F3]	Common Stock, par value $0.01 (1)	—	—	1	Acquired
Aug. 4, 2015	CABO	Restricted Stock Unit (RSU)	Common Stock, par value $0.01 (428)	—	—	428	Acquired
Oct. 7, 2013	GHC	Employee Stock Option (right to buy)	Class B Common Stock (2,000)	$368.56	Jan. 1, 2014	2,000	Acquired
Oct. 7, 2013	GHC	Employee Stock Option (right to buy)	Class B Common Stock (2,000)	$426.74	Jan. 1, 2014	2,000	Acquired
Oct. 7, 2013	GHC	Employee Stock Option (right to buy)	Class B Common Stock (750)	$395.68	Jan. 1, 2014	750	Acquired
Oct. 1, 2013	GHC	Employee Stock Option (right to buy)	Class B Common Stock (250)	$395.68	Dec. 7, 2020	250	Disposed
Dec. 7, 2010	GHC	Employee Stock Option (right to buy)	Class B Common Stock (1,000)	$395.68	Dec. 7, 2020	1,000	Acquired

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

Initial ownership (Form 3) 9 holdings

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

Date	Ticker	Security	Shares	Ownership
June 29, 2021	XMTR	Stock Option (right to buy)→ Common Stock (70,000)	70,000	Direct
Oct. 2, 2018	RSG	Common Stock	0	Direct
Aug. 31, 2018	CABO	Common Stock, par value $0.01	—	Direct
July 1, 2015	CABO	Common Stock, par value $0.01	14,721	Direct
Oct. 1, 2010	GHC	Class B Common Stock	75	Direct
Oct. 1, 2010	GHC	Class B Common Stock	2,625	Direct
Oct. 1, 2010	GHC	Employee Stock Option (right to buy)→ Class B Common Stock (2,000)	2,000	Direct
Oct. 1, 2010	GHC	Employee Stock Option (right to buy)→ Class B Common Stock (2,000)	2,000	Direct
Oct. 1, 2010	GHC	Employee Stock Option (right to buy)→ Class B Common Stock (2,000)	2,000	Direct