KLA (KLAC)
KLA on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as optical instruments & lenses.
24.9M
Short interest
settlement 2026-10-15
2.7
Days to cover
+0.1 days vs prior
17.8%
Short share of volume
2026-11-02
1,979
Fails to deliver
settlement 2026-10-13
Thu 28 Jan
Next earnings
estimated date
-$64.2M
Insider flow, 90 days
0 buys, 11 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in KLAC is 24,883,449 shares, up 1,329,410 shares over the last month. Over the last 48 readings it ranged from 2,312,762 shares (31 October 2024) to 40,762,347 shares (15 June 2026). At the reported average volume of 9.2M shares a day that is 2.7 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 24,883,449 | +2.6% | 9,162,726 | 2.72 |
| 2026-09-30 | 24,261,297 | +3.0% | 9,194,438 | 2.64 |
| 2026-09-15 | 23,554,039 | -19.9% | 9,415,932 | 2.50 |
| 2026-08-31 | 29,401,138 | +16.0% | 8,756,827 | 3.36 |
| 2026-08-14 | 25,337,831 | -6.2% | 10,039,327 | 2.52 |
| 2026-07-31 | 27,024,003 | -3.3% | 12,947,187 | 2.09 |
| 2026-07-15 | 27,939,763 | -18.7% | 13,773,473 | 2.03 |
| 2026-06-30 | 34,375,617 | -15.7% | 16,039,974 | 2.14 |
| 2026-06-15 | 40,762,347 | +1060.6% | 13,024,592 | 3.13 |
| 2026-05-29 | 3,504,100 | +3.7% | 949,938 | 3.69 |
| 2026-05-15 | 3,380,525 | +6.2% | 1,041,927 | 3.24 |
| 2026-04-30 | 3,184,475 | -4.7% | 994,086 | 3.20 |
| 2026-04-15 | 3,341,196 | +5.2% | 791,990 | 4.22 |
| 2026-03-31 | 3,176,233 | +6.0% | 1,038,692 | 3.06 |
| 2026-03-13 | 2,995,660 | +1.6% | 1,027,953 | 2.91 |
| 2026-02-27 | 2,947,691 | +1.4% | 745,119 | 3.96 |
| 2026-02-13 | 2,908,133 | +11.8% | 1,356,383 | 2.14 |
| 2026-01-30 | 2,601,171 | -14.4% | 1,444,667 | 1.80 |
| 2026-01-15 | 3,040,627 | -9.5% | 1,051,762 | 2.89 |
| 2025-12-31 | 3,360,917 | -6.0% | 741,856 | 4.53 |
| 2025-12-15 | 3,575,716 | +8.2% | 846,344 | 4.22 |
| 2025-11-28 | 3,304,319 | -10.9% | 1,110,507 | 2.98 |
| 2025-11-14 | 3,710,400 | +16.9% | 1,056,267 | 3.51 |
| 2025-10-31 | 3,173,235 | +7.5% | 1,061,493 | 2.99 |
| 2025-10-15 | 2,951,921 | -12.9% | 1,151,057 | 2.56 |
| 2025-09-30 | 3,387,793 | -9.1% | 944,149 | 3.59 |
| 2025-09-15 | 3,727,843 | +10.5% | 878,337 | 4.24 |
| 2025-08-29 | 3,374,169 | -5.1% | 816,215 | 4.13 |
| 2025-08-15 | 3,554,507 | +9.6% | 1,072,311 | 3.31 |
| 2025-07-31 | 3,244,666 | +3.7% | 1,081,434 | 3.00 |
| 2025-07-15 | 3,127,974 | -13.1% | 759,720 | 4.12 |
| 2025-06-30 | 3,598,591 | -3.0% | 1,279,140 | 2.81 |
| 2025-06-13 | 3,709,167 | +3.4% | 1,279,035 | 2.90 |
| 2025-05-30 | 3,586,170 | +9.5% | 1,086,535 | 3.30 |
| 2025-05-15 | 3,274,447 | +33.0% | 1,179,947 | 2.78 |
| 2025-04-30 | 2,461,283 | -18.8% | 1,138,131 | 2.16 |
| 2025-04-15 | 3,030,350 | +7.0% | 1,803,740 | 1.68 |
| 2025-03-31 | 2,830,986 | -16.8% | 958,135 | 2.95 |
| 2025-03-14 | 3,401,110 | +1.6% | 1,093,342 | 3.11 |
| 2025-02-28 | 3,347,350 | +17.0% | 1,102,661 | 3.04 |
| 2025-02-14 | 2,860,448 | +7.6% | 839,884 | 3.41 |
| 2025-01-31 | 2,659,031 | -15.1% | 1,384,201 | 1.92 |
| 2025-01-15 | 3,132,335 | -3.4% | 1,181,666 | 2.65 |
| 2024-12-31 | 3,243,046 | +0.2% | 1,010,371 | 3.21 |
| 2024-12-13 | 3,236,620 | +8.4% | 1,126,083 | 2.87 |
| 2024-11-29 | 2,985,568 | +6.1% | 1,195,618 | 2.50 |
| 2024-11-15 | 2,814,848 | +21.7% | 1,222,560 | 2.30 |
| 2024-10-31 | 2,312,762 | -8.7% | 1,288,828 | 1.79 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of KLAC volume is 17.8%, up 3.1 points over the last five sessions. Over the last 30 readings it ranged from 12.7% (23 October 2026) to 54.2% (23 September 2026). The latest reading is 14.5 points below the 30-session average of 32.3%, on 4.7M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 828K | 4.7M | 17.8% | 2,434 |
| 2026-10-30 | 2.6M | 5.7M | 44.8% | 9,624 |
| 2026-10-29 | 2.1M | 5.2M | 39.9% | 3,377 |
| 2026-10-28 | 1.1M | 3.6M | 30.7% | 6,063 |
| 2026-10-27 | 525K | 3.3M | 16.0% | 7,404 |
| 2026-10-26 | 514K | 3.5M | 14.7% | 4,776 |
| 2026-10-23 | 421K | 3.3M | 12.7% | 19,290 |
| 2026-10-22 | 1.5M | 6.4M | 22.7% | 2,426 |
| 2026-10-21 | 528K | 2.1M | 24.9% | 5,518 |
| 2026-10-20 | 605K | 4.0M | 15.1% | 2,676 |
| 2026-10-19 | 663K | 3.1M | 21.7% | 3,371 |
| 2026-10-16 | 1.5M | 3.3M | 44.6% | 3,660 |
| 2026-10-15 | 805K | 4.2M | 19.1% | 1,809 |
| 2026-10-14 | 1.2M | 4.0M | 31.0% | 2,661 |
| 2026-10-13 | 1.1M | 3.4M | 32.1% | 3,064 |
| 2026-10-12 | 686K | 2.1M | 32.7% | 988 |
| 2026-10-09 | 592K | 1.8M | 33.4% | 3,659 |
| 2026-10-08 | 1.6M | 3.5M | 46.6% | 900 |
| 2026-10-07 | 848K | 2.1M | 40.7% | 3,427 |
| 2026-10-06 | 1.1M | 3.1M | 36.9% | 10,765 |
| 2026-10-05 | 726K | 2.3M | 31.7% | 3,945 |
| 2026-10-02 | 957K | 2.3M | 41.8% | 134 |
| 2026-10-01 | 1.0M | 2.8M | 36.3% | 1,786 |
| 2026-09-30 | 603K | 1.7M | 34.5% | 1,449 |
| 2026-09-29 | 885K | 2.5M | 35.4% | 5,257 |
| 2026-09-28 | 810K | 2.5M | 32.6% | 2,342 |
| 2026-09-25 | 613K | 2.6M | 23.8% | 4,192 |
| 2026-09-24 | 1.1M | 2.2M | 49.9% | 1,880 |
| 2026-09-23 | 1.3M | 2.3M | 54.2% | 3,006 |
| 2026-09-22 | 1.2M | 2.4M | 51.1% | 1,381 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 13 October 2026, the fails-to-deliver balance in KLAC is 1,979 shares, up 1,372 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (21 August 2026) to 171,693 shares (7 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 1,979 | $190.12 | $376K |
| 2026-10-09 | 607 | $196.72 | $119K |
| 2026-10-05 | 1,324 | $206.89 | $274K |
| 2026-09-28 | 38 | $187.92 | $7K |
| 2026-09-21 | 35,892 | $176.99 | $6.4M |
| 2026-09-18 | 96 | $168.98 | $16K |
| 2026-09-15 | 61 | $169.09 | $10K |
| 2026-09-09 | 20 | $188.98 | $4K |
| 2026-09-08 | 103 | $185.60 | $19K |
| 2026-09-03 | 3,989 | $172.26 | $687K |
| 2026-09-01 | 7,670 | $175.45 | $1.3M |
| 2026-08-31 | 2,740 | $175.54 | $481K |
| 2026-08-28 | 103 | $183.77 | $19K |
| 2026-08-27 | 37,109 | $183.83 | $6.8M |
| 2026-08-26 | 178 | $183.34 | $33K |
| 2026-08-21 | 1 | $185.86 | $186 |
| 2026-08-20 | 567 | $187.27 | $106K |
| 2026-08-17 | 104 | $203.72 | $21K |
| 2026-08-14 | 3,834 | $209.37 | $803K |
| 2026-08-12 | 4,520 | $200.47 | $906K |
| 2026-08-10 | 170,167 | $198.11 | $33.7M |
| 2026-08-07 | 171,693 | $193.22 | $33.2M |
| 2026-08-05 | 70 | $195.45 | $14K |
| 2026-07-30 | 72 | $170.19 | $12K |
| 2026-07-28 | 616 | $203.36 | $125K |
| 2026-07-27 | 34 | $210.52 | $7K |
| 2026-07-24 | 12,508 | $218.73 | $2.7M |
| 2026-07-23 | 105 | $214.69 | $23K |
| 2026-07-22 | 104 | $217.56 | $23K |
| 2026-07-21 | 9 | $207.60 | $2K |
Insider trades
SEC Form 4, newest first. JSONInsiders at KLAC reported 11 open-market sells worth $64.2M in the last 90 days and no open-market buys. Latest filing: WALLACE RICHARD P (President and CEO) on 2026-09-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | WALLACE RICHARD P | President and CEO | Sell | 72K | $171.88 | $12.4M | 707K |
| 2026-08-13 | Lorig Brian | EVP, KLA Global Services | Sell | 60K | $208.13 | $12.4M | 78K |
| 2026-08-12 | Higgins Bren D. | EVP & Chief Financial Officer | Sell | 32K | $209.87 | $6.6M | 308K |
| 2026-08-11 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Sell | 33K | $198.95 | $6.6M | 238K |
| 2026-08-11 | WALLACE RICHARD P | President and CEO | Sell | 88K | $198.95 | $17.4M | 779K |
| 2026-08-10 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 529 | $204.56 | $108K | 13K |
| 2026-08-10 | Wilkinson Mary Beth | EVP, CLO and Secretary | Sell | 2K | $204.56 | $340K | 37K |
| 2026-08-07 | WALLACE RICHARD P | President and CEO | Tax withholding | 13K | $193.22 | $2.5M | 867K |
| 2026-08-07 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 3K | $193.22 | $556K | 137K |
| 2026-08-07 | Wilkinson Mary Beth | EVP, CLO and Secretary | Sell | 22K | $197.57 | $4.3M | 39K |
| 2026-08-07 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 1K | $193.22 | $233K | 61K |
| 2026-08-07 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 5K | $193.22 | $876K | 271K |
| 2026-08-07 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 2K | $197.57 | $475K | 14K |
| 2026-08-07 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 521 | $193.22 | $101K | 16K |
| 2026-08-07 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 5K | $193.22 | $876K | 339K |
| 2026-08-06 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 31K | $192.80 | $6.0M | 276K |
| 2026-08-06 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Grant | 62K | $0.00 | $0 | 307K |
| 2026-08-06 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 22K | $192.80 | $4.2M | 244K |
| 2026-08-06 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Grant | 87K | $0.00 | $0 | 266K |
| 2026-08-06 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 2K | $192.80 | $456K | 17K |
| 2026-08-06 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Grant | 10K | $0.00 | $0 | 19K |
| 2026-08-06 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 12K | $192.80 | $2.4M | 140K |
| 2026-08-06 | Lorig Brian | EVP, KLA Global Services | Grant | 25K | $0.00 | $0 | 153K |
| 2026-08-06 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 10K | $192.80 | $1.9M | 128K |
| 2026-08-06 | Lorig Brian | EVP, KLA Global Services | Grant | 40K | $0.00 | $0 | 137K |
| 2026-08-06 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 11K | $192.80 | $2.0M | 62K |
| 2026-08-06 | Wilkinson Mary Beth | EVP, CLO and Secretary | Grant | 25K | $0.00 | $0 | 72K |
| 2026-08-06 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 5K | $192.80 | $1.0M | 47K |
| 2026-08-06 | Wilkinson Mary Beth | EVP, CLO and Secretary | Grant | 25K | $0.00 | $0 | 53K |
| 2026-08-06 | WALLACE RICHARD P | President and CEO | Grant | 41K | $0.00 | $0 | 879K |
| 2026-08-06 | WALLACE RICHARD P | President and CEO | Tax withholding | 46K | $192.80 | $9.0M | 838K |
| 2026-08-06 | WALLACE RICHARD P | President and CEO | Grant | 94K | $0.00 | $0 | 885K |
| 2026-08-06 | WALLACE RICHARD P | President and CEO | Tax withholding | 87K | $192.80 | $16.9M | 791K |
| 2026-08-06 | WALLACE RICHARD P | President and CEO | Grant | 353K | $0.00 | $0 | 879K |
| 2026-08-06 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 31K | $192.80 | $6.0M | 344K |
| 2026-08-06 | Higgins Bren D. | EVP & Chief Financial Officer | Grant | 62K | $0.00 | $0 | 375K |
| 2026-08-06 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 22K | $192.80 | $4.2M | 312K |
| 2026-08-06 | Higgins Bren D. | EVP & Chief Financial Officer | Grant | 87K | $0.00 | $0 | 334K |
| 2026-08-05 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Grant | 24K | $0.00 | $0 | 179K |
| 2026-08-05 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Grant | 2K | $0.00 | $0 | 10K |
| 2026-08-05 | Lorig Brian | EVP, KLA Global Services | Grant | 16K | $0.00 | $0 | 98K |
| 2026-08-05 | Wilkinson Mary Beth | EVP, CLO and Secretary | Grant | 5K | $0.00 | $0 | 27K |
| 2026-08-05 | Higgins Bren D. | EVP & Chief Financial Officer | Grant | 24K | $0.00 | $0 | 247K |
| 2026-08-05 | Wilkinson Mary Beth | EVP, CLO and Secretary | Sell | 14K | $195.50 | $2.7M | 22K |
| 2026-08-05 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 5K | $195.50 | $881K | 8K |
| 2026-08-04 | Wilkinson Mary Beth | EVP, CLO and Secretary | Sell | 4K | $191.59 | $823K | 36K |
| 2026-08-04 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 8K | $182.75 | $1.4M | 40K |
| 2026-08-04 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 3K | $182.75 | $459K | 48K |
| 2026-08-04 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 2K | $191.59 | $300K | 12K |
| 2026-08-04 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 3K | $182.75 | $608K | 14K |
| 2026-08-04 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 1K | $182.75 | $202K | 17K |
| 2026-08-04 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 23K | $182.75 | $4.3M | 154K |
| 2026-08-04 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 8K | $182.75 | $1.4M | 177K |
| 2026-08-04 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 11K | $182.75 | $2.0M | 82K |
| 2026-08-04 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 4K | $182.75 | $675K | 93K |
| 2026-08-04 | WALLACE RICHARD P | President and CEO | Tax withholding | 90K | $182.75 | $16.4M | 526K |
| 2026-08-04 | WALLACE RICHARD P | President and CEO | Tax withholding | 20K | $182.75 | $3.6M | 616K |
| 2026-08-04 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 22K | $182.75 | $4.1M | 222K |
| 2026-08-04 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 7K | $182.75 | $1.4M | 244K |
| 2026-08-03 | WALLACE RICHARD P | President and CEO | Tax withholding | 19K | $182.82 | $3.6M | 636K |
| 2026-08-03 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 2K | $182.82 | $326K | 50K |
| 2026-08-03 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 7K | $182.82 | $1.3M | 185K |
| 2026-08-03 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 3K | $182.82 | $600K | 96K |
| 2026-08-03 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 730 | $182.82 | $133K | 18K |
| 2026-08-03 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 7K | $182.82 | $1.3M | 252K |
| 2026-08-01 | WALLACE RICHARD P | President and CEO | Tax withholding | 13K | $182.82 | $2.4M | 655K |
| 2026-08-01 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 1K | $182.82 | $245K | 52K |
| 2026-08-01 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 5K | $182.82 | $823K | 192K |
| 2026-08-01 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 3K | $182.82 | $549K | 100K |
| 2026-08-01 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Tax withholding | 373 | $182.82 | $68K | 19K |
| 2026-08-01 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 5K | $182.82 | $823K | 259K |
| 2026-07-02 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 196 | $265.69 | $52K | 20K |
| 2026-07-02 | Higgins Bren D. | EVP & Chief Financial Officer | Sell | 28K | $265.69 | $7.4M | 263K |
| 2026-07-01 | Wilkinson Mary Beth | EVP, CLO and Secretary | Sell | 14K | $285.30 | $4.1M | 53K |
| 2026-06-30 | Lorig Brian | EVP, KLA Global Services | Tax withholding | 12K | $278.39 | $3.4M | 103K |
| 2026-06-30 | Lorig Brian | EVP, KLA Global Services | Other transaction | 196 | $108.33 | $21K | 115K |
| 2026-06-30 | WALLACE RICHARD P | President and CEO | Tax withholding | 46K | $278.39 | $12.8M | 668K |
| 2026-06-30 | WALLACE RICHARD P | President and CEO | Other transaction | 196 | $108.33 | $21K | 714K |
| 2026-06-30 | Wilkinson Mary Beth | EVP, CLO and Secretary | Tax withholding | 10K | $278.39 | $2.9M | 68K |
| 2026-06-30 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Tax withholding | 31K | $278.39 | $8.5M | 197K |
| 2026-06-30 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Other transaction | 196 | $108.33 | $21K | 227K |
| 2026-06-30 | Higgins Bren D. | EVP & Chief Financial Officer | Tax withholding | 31K | $278.39 | $8.5M | 291K |
| 2026-06-30 | Higgins Bren D. | EVP & Chief Financial Officer | Other transaction | 196 | $108.33 | $21K | 322K |
| 2026-06-30 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Other transaction | 196 | $108.33 | $21K | 20K |
| 2026-06-11 | WALLACE RICHARD P | President and CEO | Sell | 5K | $2213.37 | $10.0M | 71K |
| 2026-05-12 | WALLACE RICHARD P | President and CEO | Sell | 5K | $1794.00 | $8.1M | 76K |
| 2026-05-11 | Kirloskar Virendra A | SVP & Chief Accounting Officer | Sell | 297 | $1879.02 | $558K | 2K |
| 2026-05-11 | Hanley Jeneanne Michelle | Director | Sell | 550 | $1874.71 | $1.0M | 4K |
| 2026-02-05 | CALDERONI ROBERT | Director | Grant | 11 | $0.00 | $0 | 4K |
| 2026-02-05 | CALDERONI ROBERT | Director | Grant | 11 | $0.00 | $0 | 4K |
| 2025-12-16 | Higgins Bren D. | EVP & Chief Financial Officer | Sell | 2K | $1237.01 | $2.8M | 32K |
| 2025-11-12 | Khan Ahmad A. | President, Semi. Prod. & Cust. | Gift | 85 | $0.00 | $0 | 23K |
| 2025-11-11 | WALLACE RICHARD P | President and CEO | Gift | 804 | $0.00 | $0 | 80K |
| 2025-11-11 | WALLACE RICHARD P | President and CEO | Sell | 11K | $1203.10 | $13.0M | 81K |
| 2025-11-05 | Samath Jamie | Director | Grant | 204 | $0.00 | $0 | 378 |
| 2025-11-05 | Hanley Jeneanne Michelle | Director | Grant | 204 | $0.00 | $0 | 4K |
| 2025-11-05 | KENNEDY KEVIN | Director | Grant | 204 | $0.00 | $0 | 3K |
| 2025-11-05 | PENG VICTOR | Director | Grant | 204 | $0.00 | $0 | 2K |
| 2025-11-05 | Taylor Susan J.S. | Director | Grant | 204 | $0.00 | $0 | 370 |
| 2025-11-05 | McMullen Michael R. | Director | Grant | 204 | $0.00 | $0 | 1K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON22 Form 144 notices on file for KLAC worth $119.1M at the prices reported; 11 in the last 90 days worth $64.2M. Latest: WALLACE RICHARD P filed on 2026-09-15 to sell 72,019 shares ($12.4M) from 2026-09-15.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-15 | WALLACE RICHARD POfficer, Director | 72K | $12.4M | 0.006% | 2026-09-15 | Fidelity Brokerage Services LLC |
| 2026-08-13 | Lorig BrianOfficer | 60K | $12.4M | 0.005% | 2026-08-13 | Fidelity Brokerage Services LLC |
| 2026-08-12 | Higgins Bren D.Officer | 32K | $6.6M | 0.002% | 2026-08-12 | Fidelity Brokerage Services LLC |
| 2026-08-11 | Khan Ahmad A.Officer | 33K | $6.6M | 0.003% | 2026-08-11 | Fidelity Brokerage Services LLC |
| 2026-08-11 | WALLACE RICHARD POfficer, Director | 88K | $17.4M | 0.007% | 2026-08-11 | Fidelity Brokerage Services LLC |
| 2026-08-10 | Wilkinson Mary BethOfficer | 2K | $340K | 0.000% | 2026-08-10 | Fidelity Brokerage Services LLC |
| 2026-08-10 | Kirloskar Virendra AOfficer | 529 | $108K | 0.000% | 2026-08-10 | Fidelity Brokerage Services LLC |
| 2026-08-07 | Wilkinson Mary BethOfficer | 22K | $4.3M | 0.002% | 2026-08-07 | Fidelity Brokerage Services LLC |
| 2026-08-07 | Kirloskar Virendra AOfficer | 2K | $475K | 0.000% | 2026-08-07 | Fidelity Brokerage Services LLC |
| 2026-08-05 | Wilkinson Mary BethOfficer | 14K | $2.7M | 0.011% | 2026-08-05 | Fidelity Brokerage Services LLC |
| 2026-08-05 | Kirloskar Virendra AOfficer | 5K | $881K | 0.003% | 2026-08-05 | Fidelity Brokerage Services LLC |
| 2026-08-04 | Kirloskar Virendra AOfficer | 2K | $300K | 0.001% | 2026-08-04 | Fidelity Brokerage Services LLC |
| 2026-08-04 | Wilkinson Mary BethOfficer | 4K | $823K | 0.003% | 2026-08-04 | Fidelity Brokerage Services LLC |
| 2026-07-02 | Higgins Bren D.Officer | 28K | $7.4M | 0.021% | 2026-07-02 | Fidelity Brokerage Services LLC |
| 2026-07-02 | Kirloskar Virendra AOfficer | 196 | $52K | 0.000% | 2026-07-02 | Fidelity Brokerage Services LLC |
| 2026-07-02 | Higgins Bren D.Officer | 28K | $7.4M | 0.021% | 2026-07-02 | Fidelity Brokerage Services LLC |
| 2026-07-01 | Wilkinson Mary BethOfficer | 14K | $4.1M | 0.011% | 2026-07-01 | Fidelity Brokerage Services LLC |
| 2026-06-11 | WALLACE RICHARD POfficer, Director | 5K | $10.0M | 0.003% | 2026-06-11 | Fidelity Brokerage Services LLC |
| 2026-05-12 | WALLACE RICHARD POfficer, Director | 5K | $8.1M | 0.003% | 2026-05-12 | Fidelity Brokerage Services LLC |
| 2026-05-11 | Hanley Jeneanne MichelleDirector | 550 | $1.0M | 0.000% | 2026-05-11 | Fidelity Brokerage Services LLC |
| 2025-12-16 | Higgins Bren D.Officer | 2K | $2.8M | 0.002% | 2025-12-16 | Fidelity Brokerage Services LLC |
| 2025-11-12 | WALLACE RICHARD POfficer, Director | 11K | $13.0M | 0.008% | 2025-11-11 | Fidelity Brokerage Services LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON1 holder reports 5% or more of KLAC in its latest filing, on Schedule 13G (passive). The holder is Vanguard Capital Management at 7.5% of the class (9,822,421 shares), filed 2026-04-30 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 9.8M | 7.5% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 14 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding KLAC at their latest 13F. JSON7 of the 30 tracked managers held KLAC at their latest 13F, $1.64B in total at quarter-end prices. Citadel Advisors is the largest at $766.7M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 2.5M | $766.7M | 0.09% | +2.5M |
| AQR Capital Management | 2026-06-30 | 1.9M | $571.9M | 0.20% | +1.8M |
| Bridgewater Associates | 2026-06-30 | 328K | $99.0M | 0.41% | +219K |
| Fisher Asset Management | 2026-06-30 | 327K | $98.7M | 0.03% | +297K |
| Millennium Management | 2026-06-30 | 178K | $53.7M | 0.02% | +153K |
| Two Sigma Investments | 2026-06-30 | 87K | $26.1M | 0.02% | +82K |
| D. E. Shaw & Co. | 2026-06-30 | 80K | $24.2M | 0.01% | +31K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q1 FY 2027 (quarter ended 2026-09-30) KLA reported revenue of $4.14B, up 28.9% from the same quarter a year earlier, and net income of $1.55B (1.18 diluted EPS). In FY 2026 it generated $4.14B of operating cash flow and spent $2.29B on buybacks and $1.06B on dividends. As of 2026-09-30, cash was $1.53B against $5.72B of debt.
- Cash
- $1.53B
- Debt
- $5.72B
- Equity
- $6.52B
- Total assets
- $18.40B
- Shares outstanding
- 1,302,962,435
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q1 FY 2027 | 2026-09-30 | $4.14B | $1.55B | 37.4% | 1.18 |
| Q4 FY 2026derived | 2026-06-30 | $3.66B | $1.36B | 37.3% | n/a |
| Q3 FY 2026 | 2026-03-31 | $3.42B | $1.20B | 35.2% | 9.12 |
| Q2 FY 2026 | 2025-12-31 | $3.30B | $1.15B | 34.7% | 8.68 |
| Q1 FY 2026 | 2025-09-30 | $3.21B | $1.12B | 34.9% | 0.85 |
| Q4 FY 2025derived | 2025-06-30 | $3.17B | $1.20B | 37.9% | n/a |
| Q3 FY 2025 | 2025-03-31 | $3.06B | $1.09B | 35.5% | 8.16 |
| Q2 FY 2025 | 2024-12-31 | $3.08B | $824.5M | 26.8% | 6.16 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2026 | 2026-06-30 | $13.58B | $4.83B | $4.14B | $375.9M | $2.29B | $1.06B |
| FY 2025 | 2025-06-30 | $12.16B | $4.06B | $4.08B | $335.3M | $2.15B | $904.6M |
| FY 2024 | 2024-06-30 | $9.81B | $2.76B | $3.31B | $277.4M | $1.74B | $773.0M |
| FY 2023 | 2023-06-30 | $10.50B | $3.39B | $3.67B | $341.6M | $1.31B | $732.6M |
| FY 2022 | 2022-06-30 | $9.21B | $3.32B | $3.31B | $307.3M | $3.97B | $638.5M |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-09-30; shares outstanding as of 2026-10-26 from the cover page.
What this page is
KLA in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows KLA (KLAC), SEC CIK 319201, listed on Nasdaq, classified by the SEC as optical instruments & lenses. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-15.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-04-30.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-09-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-10-28.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 319201Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of KLAC is sold short?
24,883,449 shares were held short at the 2026-10-15 settlement, 2.7 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is KLAC's daily short volume?
On 2026-11-02, 827,840 of the 4,657,482 KLAC shares reported to FINRA were sold short, 17.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does KLAC have fails to deliver?
The SEC's latest file shows 1,979 KLAC shares failed to deliver at settlement 2026-10-13. Fails are reported per settlement date and published twice a month with a lag.
Are KLAC insiders buying or selling?
Insiders at KLAC reported 11 open-market sells worth $64.2M in the last 90 days and no open-market buys. Latest filing: WALLACE RICHARD P (President and CEO) on 2026-09-15.
Have KLAC insiders filed to sell?
22 Form 144 notices on file for KLAC worth $119.1M at the prices reported; 11 in the last 90 days worth $64.2M. Latest: WALLACE RICHARD P filed on 2026-09-15 to sell 72,019 shares ($12.4M) from 2026-09-15.
Who owns 5% or more of KLAC?
1 holder reports 5% or more of KLAC in its latest filing, on Schedule 13G (passive). The holder is Vanguard Capital Management at 7.5% of the class (9,822,421 shares), filed 2026-04-30 for an event on 2026-03-31.
What did KLAC report last quarter?
In Q1 FY 2027 (quarter ended 2026-09-30) KLA reported revenue of $4.14B, up 28.9% from the same quarter a year earlier, and net income of $1.55B (1.18 diluted EPS). In FY 2026 it generated $4.14B of operating cash flow and spent $2.29B on buybacks and $1.06B on dividends. As of 2026-09-30, cash was $1.53B against $5.72B of debt.
Which tracked 13F managers own KLAC?
7 of the 30 tracked 13F managers held KLAC shares at their latest filing, $1.64B in all. The largest: Ken Griffin's Citadel Advisors (2.5M shares, $766.7M), Cliff Asness's AQR Capital Management (1.9M shares, $571.9M), Ray Dalio's Bridgewater Associates (328K shares, $99.0M), Ken Fisher's Fisher Asset Management (327K shares, $98.7M), Izzy Englander's Millennium Management (178K shares, $53.7M), Two Sigma Investments (87K shares, $26.1M). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.