PACB · Pacific Biosciences Of California, Inc.

$1.29 +0.01 (+0.78%)

Russell 2000 member Rebalance outlook locked

Market Cap

$435.16M

310.83M

Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.

PACB Latest Reported Short Interest

FINRA reported 53,412,027 PACB shares sold short as of the August 14, 2026 settlement date, an increase of 4,407,186 shares. Days to cover was 6.63 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent stock splits

PACB Short Interest Forecast

Equibles' model estimates 51,731,899 shares sold short for the August 31, 2026 settlement, -3.1% versus the latest reported position, with a likely range of 46,633,669 to 56,686,272 shares. This model prediction uses FINRA data through August 31, 2026; FINRA's official release is expected September 10, 2026.

Model estimate

Expected Aug 31 short interest

as of Aug 31 Medium confidence 66% chance it falls

51,731,899 -3.1% vs reported

Likely range 46,633,669 to 56,686,272 The latest estimate appears in the chart below. Official release expected Sep 10. Methodology

Short Squeeze Score

76/100

Short interest 17.2% of shares — P97 Days to cover 6.6 — P80 Price vs VWAP -9.4% — P27 Short-volume trend +4.8% — P68 Short interest change +9.0% — P75 Worst FTD 0.29% of shares — P91

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-08-14). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.

1M 3M 6M 1Y 5Y All

Short Interest History

Settlement Date	Current Position	Previous Position	Change	Avg Daily Volume	Days to Cover
2026-09-15 Scheduled FINRA publishes Sep 24	—	—	—	—	—
2026-08-31 Scheduled FINRA publishes Sep 10	—	—	—	—	—
2026-08-14	53,412,027	49,004,841	+4,407,186	8,056,891	6.63
2026-07-31	49,004,841	46,237,636	+2,767,205	6,666,706	7.35
2026-07-15	46,237,636	47,490,204	-1,252,568	4,638,329	9.97
2026-06-30	47,490,204	60,560,138	-13,069,934	7,291,153	6.51
2026-06-15	60,560,138	48,707,384	+11,852,754	5,954,109	10.17
2026-05-29	48,707,384	59,926,798	-11,219,414	5,684,330	8.57
2026-05-15	59,926,798	47,090,593	+12,836,205	6,645,578	9.02
2026-04-30	47,090,593	46,364,406	+726,187	6,688,960	7.04
2026-04-15	46,364,406	45,631,632	+732,774	5,505,784	8.42
2026-03-31	45,631,632	41,388,621	+4,243,011	5,428,096	8.41
2026-03-13	41,388,621	38,191,242	+3,197,379	6,304,987	6.56
2026-02-27	38,191,242	38,916,811	-725,569	5,352,300	7.14
2026-02-13	38,916,811	35,591,593	+3,325,218	7,386,819	5.27
2026-01-30	35,591,593	35,091,747	+499,846	8,377,033	4.25
2026-01-15	35,091,747	34,003,835	+1,087,912	8,781,846	4.00
2025-12-31	34,003,835	34,259,532	-255,697	6,403,082	5.31
2025-12-15	34,259,532	34,042,917	+216,615	6,286,336	5.45
2025-11-28	34,042,917	33,569,699	+473,218	11,064,220	3.08
2025-11-14	33,569,699	32,511,384	+1,058,315	9,267,258	3.62
2025-10-31	32,511,384	34,508,178	-1,996,794	11,362,122	2.86
2025-10-15	34,508,178	37,967,832	-3,459,654	8,397,808	4.11
2025-09-30	37,967,832	45,550,788	-7,582,956	6,535,511	5.81
2025-09-15	45,550,788	37,111,300	+8,439,488	5,195,811	8.77

Full FINRA short interest reporting calendar

Showing 1–23 of 23 settlements

Key facts CIK 1299130 CUSIP 69404D108 13F (30d) 179 filings 175 filers Visit website