PRLB · Proto Labs Inc

$91.87 -0.45 (-0.49%) At close · Aug 14

Market Cap

$2.17B

23.92M

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start	ATS Volume	Non-ATS OTC Volume	Total Off-Exchange	% of FINRA Weekly Volume
2026-07-06	515,656	152,505	668,161	45.1%
2026-06-29	203,406	98,389	301,795	39.0%
2026-06-22	238,483	290,821	529,304	32.3%
2026-06-15	261,384	167,753	429,137	35.5%
2026-06-08	315,525	170,553	486,078	41.6%
2026-06-01	242,090	157,391	399,481	41.8%
2026-05-25	161,912	119,138	281,050	36.0%
2026-05-18	268,525	95,642	364,167	38.2%
2026-05-11	317,697	108,270	425,967	38.8%
2026-05-04	213,606	120,111	333,717	36.5%
2026-04-27	200,824	107,843	308,667	30.0%
2026-04-20	115,812	158,915	274,727	45.0%
2026-04-13	194,231	102,688	296,919	38.5%
2026-04-06	126,211	52,654	178,865	25.6%
2026-03-30	127,184	47,067	174,251	28.8%
2026-03-23	156,363	84,905	241,268	32.2%
2026-03-16	145,196	108,416	253,612	27.8%
2026-03-09	198,906	102,628	301,534	32.8%
2026-03-02	164,475	94,819	259,294	33.1%
2026-02-23	212,510	108,290	320,800	37.0%
2026-02-16	179,160	77,760	256,920	36.6%
2026-02-09	490,068	151,788	641,856	43.2%
2026-02-02	457,864	192,882	650,746	42.0%
2026-01-26	259,154	73,358	332,512	41.6%
2026-01-19	181,838	134,599	316,437	41.8%
2026-01-12	165,348	76,356	241,704	37.3%
2026-01-05	171,432	51,162	222,594	32.7%
2025-12-29	92,598	58,314	150,912	37.3%
2025-12-22	63,864	50,898	114,762	32.2%
2025-12-15	136,218	445,275	581,493	43.2%
2025-12-08	109,689	53,967	163,656	29.3%
2025-12-01	123,839	107,398	231,237	38.2%
2025-11-24	91,039	104,206	195,245	29.6%
2025-11-17	132,882	74,520	207,402	26.2%
2025-11-10	141,972	205,798	347,770	37.0%
2025-11-03	310,488	121,812	432,300	27.3%
2025-10-27	319,351	153,333	472,684	34.4%
2025-10-20	211,183	180,046	391,229	39.5%
2025-10-13	256,214	177,620	433,834	34.9%
2025-10-06	146,507	154,856	301,363	36.7%
2025-09-29	118,191	87,764	205,955	32.0%
2025-09-22	181,752	126,815	308,567	33.8%
2025-09-15	161,016	96,348	257,364	23.1%
2025-09-08	128,518	119,696	248,214	36.1%
2025-09-01	107,092	108,167	215,259	33.5%
2025-08-25	191,528	158,628	350,156	37.7%
2025-08-18	168,134	82,361	250,495	33.0%

Showing 1–47 of 47 weeks

Key facts CIK 1443669 CUSIP 743713109 13F (30d) 261 filings 259 filers Visit website Investor relations