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基本データ

【業種】: 金属製品
【市場】: プライム（内国株式）
【決算期】: 12月
【会社設立】
【上場】: 2005.11
【直近決算日】: 2025-05-08（1Q）
【決算予定日】: 2025-08-07 (15:30)

【時価総額】: 4265億1300万円
【PBR】: 0.66倍
【配当利回り(予)】: %

企業概要

同社は、半導体メーカー向けシリコンウェーハの製造及び販売を業務とする「高純度シリコン事業」の単一セグメントで運営されている。
主に製造するシリコンウェーハは、メモリーやロジック用半導体の基板材料として重要な役割を果たすものであり、口径が大きくなることで生産性や歩留まりが向上し、コスト削減を実現する。
具体的には、300mmウェーハや200mm以下のウェーハの製造を行い、ポリッシュトウェーハやエピタキシャルウェーハなどの多様な製品を展開している。
国内外に製造拠点を持ち、販売体制もグローバルに展開されており、海外市場にも対応した営業機能を整備している。

業績修正履歴

年度	タイプ	日付	売上高	営業利益	経常利益	純利益

通期四半期別

売上高

経常利益

純利益

通期四半期別

決算期	四半期	売上高	営業利益	経常利益	純利益	1株当たり純利益	営業利益率	経常利益率	売上高/前年比	営業利益/前年比	経常利益/前年比	純利益/前年比
	予想		―	―	―	―	―	―	―%	―%	―%	―%
2025-12	1	102,472	5,990	4,892	3,047	8.71	5.85%	4.77%	9.6%	-31.1%	-46.3%	-39.7%
2024-12	4	396,619	36,924	37,457	19,877	56.84	9.31%	9.44%	-6.9%	-49.5%	-48.4%	-68.9%
	3	296,664	29,974	26,003	16,259	46.5	10.1%	8.77%	-7.5%	-51.5%	-59.4%	-72.4%
	2	198,273	20,822	20,441	12,614	36.07	10.5%	10.31%	-10.1%	-55.5%	-57.9%	-74.6%
	1	93,514	8,693	9,104	5,055	14.46	9.3%	9.74%	-14.9%	-66.5%	-66.8%	-86.6%
2023-12	4	425,941	73,080	72,627	63,884	182.59	17.16%	17.05%	-3.4%	-33.4%	-34.8%	-9%
	3	320,851	61,855	63,992	58,937	168.42	19.28%	19.94%	-0.9%	-22.6%	-23.3%	13.8%
	2	220,659	46,786	48,528	49,647	141.82	21.2%	21.99%	6.4%	-6%	-4.7%	58.5%
	1	109,948	25,974	27,384	37,698	107.66	23.62%	24.91%	9.5%	10.8%	15.4%	148%
2022-12	4	441,083	109,683	111,339	70,205	200.49	24.87%	25.24%	31.4%	112.8%	117.9%	70.7%
	3	323,658	79,931	83,412	51,794	147.91	24.7%	25.77%	32.4%	118.8%	137.1%	92%
	2	207,412	49,751	50,929	31,324	89.46	23.99%	24.55%	31.5%	129%	142.9%	91.3%
	1	100,449	23,452	23,734	15,202	43.42	23.35%	23.63%	32.3%	150.3%	150.5%	106.1%
2021-12	4	335,674	51,543	51,107	41,120	135.86	15.36%	15.23%	15.2%	36%	43.4%	61.2%
	3	244,463	36,533	35,184	26,979	92.9	14.94%	14.39%	11.8%	22.6%	23.4%	33.5%
	2	157,778	21,720	20,964	16,373	56.36	13.77%	13.29%	7.2%	-6.3%	-7.4%	-2.7%
	1	75,939	9,370	9,472	7,375	25.35	12.34%	12.47%	5.1%	-19.5%	-20.6%	-13.1%
2020-12	4	291,333	37,897	35,650	25,505	87.48	13.01%	12.24%	-2.7%	-25.2%	-26.2%	-23%
	3	218,745	29,794	28,508	20,209	69.29	13.62%	13.03%	-4.3%	-29.8%	-30.8%	-28.2%
	2	147,142	23,170	22,650	16,821	57.62	15.75%	15.39%	-6%	-30.9%	-30.8%	-26.8%
	1	72,244	11,644	11,934	8,490	29.01	16.12%	16.52%	-12%	-41.2%	-37.5%	-35.4%
2019-12	4	299,460	50,636	48,310	33,112	112.9	16.91%	16.13%	-7.9%	-40.5%	-41.8%	-43.5%
	3	228,511	42,459	41,209	28,132	95.92	18.58%	18.03%	-5.8%	-33.9%	-34.3%	-34.1%
	2	156,487	33,543	32,719	22,979	78.35	21.44%	20.91%	-1.6%	-18.6%	-18.4%	-18.4%
	1	82,103	19,816	19,085	13,133	44.78	24.14%	23.25%	6.2%	1.2%	4.4%	2.9%
2018-12	4	325,059	85,165	83,068	58,580	199.74	26.2%	25.55%	24.7%	102.4%	126.3%	116.8%
	3	242,456	64,252	62,702	42,663	145.47	26.5%	25.86%	27.3%	123.1%	158.8%	156.7%
	2	159,023	41,192	40,092	28,151	95.99	25.9%	25.21%	28.3%	137.8%	191.9%	192.2%
	1	77,289	19,590	18,275	12,766	43.53	25.35%	23.65%	28.4%	142.8%	231.3%	253.3%
2017-12	4	260,627	42,085	36,709	27,016	92.12	16.15%	14.08%	23.3%	199.6%	270.1%	310.1%
	3	190,405	28,799	24,228	16,621	56.68	15.13%	12.72%	22.5%	235.2%	330.6%	385.5%
	2	123,994	17,320	13,736	9,634	32.85	13.97%	11.08%	20.1%	179.7%	219%	317.5%
	1	60,195	8,067	5,516	3,613	12.32	13.4%	9.16%	16.3%	123.3%	106.2%	129.3%
2016-12	4	211,361	14,046	9,919	6,588	22.46	6.65%	4.69%	-10.8%	-52.3%	-61.2%	-66.6%
	3	155,416	8,591	5,626	3,423	11.67	5.53%	3.62%	-14.6%	-66.3%	-74.8%	-78.2%
	2	103,215	6,193	4,306	2,307	7.87	6%	4.17%	-16.1%	-66.3%	-71.9%	-78.9%
	1	51,779	3,612	2,675	1,576	5.37	6.98%	5.17%	-14.3%	-59.2%	-64.2%	-69.4%

決算期	四半期	売上高	営業利益	経常利益	純利益	1株当たり純利益	営業利益率	経常利益率	売上高/前年比	営業利益/前年比	経常利益/前年比	純利益/前年比
2025-12	1	102,472	5,990	4,892	3,047	8.71	5.85%	4.77%	9.6%	-31.1%	-46.3%	-39.7%
2024-12	4	99,955	6,950	11,454	3,618	10.34	6.95%	11.46%	-4.89%	-38.08%	32.65%	-26.86%
	3	98,391	9,152	5,562	3,645	10.43	9.3%	5.65%	-1.8%	-39.27%	-64.03%	-60.76%
	2	104,759	12,129	11,337	7,559	21.61	11.58%	10.82%	-5.38%	-41.72%	-46.38%	-36.74%
	1	93,514	8,693	9,104	5,055	14.46	9.3%	9.74%	-14.9%	-66.5%	-66.8%	-86.6%
2023-12	4	105,090	11,225	8,635	4,947	14.17	10.68%	8.22%	-10.5%	-62.27%	-69.08%	-73.13%
	3	100,192	15,069	15,464	9,290	26.6	15.04%	15.43%	-13.81%	-50.07%	-52.39%	-54.62%
	2	110,711	20,812	21,144	11,949	34.16	18.8%	19.1%	3.5%	-20.86%	-22.25%	-25.88%
	1	109,948	25,974	27,384	37,698	107.66	23.62%	24.91%	9.5%	10.8%	15.4%	148%
2022-12	4	117,425	29,752	27,927	18,411	52.58	25.34%	23.78%	28.74%	98.21%	75.39%	30.2%
	3	116,246	30,180	32,483	20,470	58.45	25.96%	27.94%	34.1%	103.74%	128.43%	93%
	2	106,963	26,299	27,195	16,122	46.04	24.59%	25.42%	30.7%	112.95%	136.64%	79.17%
	1	100,449	23,452	23,734	15,202	43.42	23.35%	23.63%	32.3%	150.3%	150.5%	106.1%
2021-12	4	91,211	15,010	15,923	14,141	42.96	16.46%	17.46%	25.66%	85.24%	122.95%	167.01%
	3	86,685	14,813	14,220	10,606	36.54	17.09%	16.4%	21.06%	123.63%	142.74%	213.05%
	2	81,839	12,350	11,492	8,998	31.01	15.09%	14.04%	9.27%	7.15%	7.24%	8.01%
	1	75,939	9,370	9,472	7,375	25.35	12.34%	12.47%	5.1%	-19.5%	-20.6%	-13.1%
2020-12	4	72,588	8,103	7,142	5,296	18.19	11.16%	9.84%	2.31%	-0.9%	0.58%	6.35%
	3	71,603	6,624	5,858	3,388	11.67	9.25%	8.18%	-0.58%	-25.71%	-31%	-34.25%
	2	74,898	11,526	10,716	8,331	28.61	15.39%	14.31%	0.69%	-16.03%	-21.4%	-15.39%
	1	72,244	11,644	11,934	8,490	29.01	16.12%	16.52%	-12%	-41.2%	-37.5%	-35.4%
2019-12	4	70,949	8,177	7,101	4,980	16.98	11.53%	10.01%	-14.11%	-60.9%	-65.13%	-68.71%
	3	72,024	8,916	8,490	5,153	17.57	12.38%	11.79%	-13.67%	-61.34%	-62.45%	-64.49%
	2	74,384	13,727	13,634	9,846	33.57	18.45%	18.33%	-8.99%	-36.45%	-37.51%	-36%
	1	82,103	19,816	19,085	13,133	44.78	24.14%	23.25%	6.2%	1.2%	4.4%	2.9%
2018-12	4	82,603	20,913	20,366	15,917	54.27	25.32%	24.66%	17.63%	57.41%	63.18%	53.12%
	3	83,433	23,060	22,610	14,512	49.48	27.64%	27.1%	25.63%	100.89%	115.5%	107.7%
	2	81,734	21,602	21,817	15,385	52.46	26.43%	26.69%	28.11%	133.46%	165.41%	155.52%
	1	77,289	19,590	18,275	12,766	43.53	25.35%	23.65%	28.4%	142.8%	231.3%	253.3%
2017-12	4	70,222	13,286	12,481	10,395	35.44	18.92%	17.77%	25.52%	143.56%	190.73%	228.44%
	3	66,411	11,479	10,492	6,987	23.83	17.28%	15.8%	27.22%	378.69%	694.85%	526.08%
	2	63,799	9,253	8,220	6,021	20.53	14.5%	12.88%	24.04%	258.5%	403.99%	723.67%
	1	60,195	8,067	5,516	3,613	12.32	13.4%	9.16%	16.3%	123.3%	106.2%	129.3%
2016-12	4	55,945	5,455	4,293	3,165	10.79	9.75%	7.67%	2.02%	39.09%	32.34%	-21.31%
	3	52,201	2,398	1,320	1,116	3.8	4.59%	2.53%	-11.4%	-66.58%	-81.02%	-76.81%
	2	51,436	2,581	1,631	731	2.5	5.02%	3.17%	-17.91%	-72.82%	-79.27%	-87.32%
	1	51,779	3,612	2,675	1,576	5.37	6.98%	5.17%	-14.3%	-59.2%	-64.2%	-69.4%

3436 ＳＵＭＣＯ 企業サイト Yahooファイナンス 日経新聞 株探 四季報

3436 ＳＵＭＣＯ　企業サイト　　　Yahooファイナンス　日経新聞　株探　四季報　