Watsco (WSO)
Watsco on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as wholesale-hardware & plumbing & heating equipment & supplies.
4.2M
Short interest
settlement 2026-09-30
7.7
Days to cover
-1.8 days vs prior
77.0%
Short share of volume
2026-10-09
470
Fails to deliver
settlement 2026-09-14
Wed 28 Oct
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-10-09.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in WSO is 4,175,908 shares, up 234,384 shares over the last month. Over the last 48 readings it ranged from 2,298,766 shares (31 January 2025) to 4,175,908 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 540K shares a day that is 7.7 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/wso" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 4,175,908 | +4.3% | 539,802 | 7.74 |
| 2026-09-15 | 4,002,277 | +1.5% | 418,111 | 9.57 |
| 2026-08-31 | 3,941,524 | +8.3% | 508,427 | 7.75 |
| 2026-08-14 | 3,638,845 | +2.9% | 472,232 | 7.71 |
| 2026-07-31 | 3,535,635 | +4.4% | 617,637 | 5.72 |
| 2026-07-15 | 3,387,898 | +12.3% | 328,335 | 10.32 |
| 2026-06-30 | 3,016,856 | +0.3% | 387,925 | 7.78 |
| 2026-06-15 | 3,006,405 | +0.7% | 319,178 | 9.42 |
| 2026-05-29 | 2,985,354 | +0.7% | 404,373 | 7.38 |
| 2026-05-15 | 2,965,702 | -9.8% | 320,497 | 9.25 |
| 2026-04-30 | 3,287,279 | -10.4% | 595,474 | 5.52 |
| 2026-04-15 | 3,667,025 | +25.6% | 481,208 | 7.62 |
| 2026-03-31 | 2,918,875 | -1.3% | 616,581 | 4.73 |
| 2026-03-13 | 2,956,091 | -4.1% | 311,930 | 9.48 |
| 2026-02-27 | 3,081,118 | -12.4% | 392,608 | 7.85 |
| 2026-02-13 | 3,517,021 | +1.4% | 492,837 | 7.14 |
| 2026-01-30 | 3,467,320 | +5.7% | 442,103 | 7.84 |
| 2026-01-15 | 3,279,169 | +3.2% | 393,863 | 8.33 |
| 2025-12-31 | 3,177,350 | -1.4% | 336,989 | 9.43 |
| 2025-12-15 | 3,222,450 | +1.1% | 464,581 | 6.94 |
| 2025-11-28 | 3,187,300 | +4.1% | 420,557 | 7.58 |
| 2025-11-14 | 3,062,798 | +5.1% | 364,178 | 8.41 |
| 2025-10-31 | 2,914,282 | +9.1% | 611,492 | 4.77 |
| 2025-10-15 | 2,672,006 | -4.5% | 593,695 | 4.50 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 9 October 2026, the short share of WSO volume is 77.0%, up 6.7 points over the last five sessions. Over the last 30 readings it ranged from 42.2% (25 September 2026) to 85.9% (1 September 2026). The latest reading is 3.6 points above the 30-session average of 73.4%, on 272K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-09 | 209K | 272K | 77.0% | 0 |
| 2026-10-08 | 208K | 274K | 75.9% | 3 |
| 2026-10-07 | 150K | 269K | 55.6% | 22 |
| 2026-10-06 | 95K | 180K | 52.9% | 0 |
| 2026-10-05 | 243K | 320K | 76.0% | 4 |
| 2026-10-02 | 141K | 201K | 70.3% | 44 |
| 2026-10-01 | 137K | 173K | 79.2% | 40 |
| 2026-09-30 | 116K | 178K | 65.2% | 0 |
| 2026-09-29 | 194K | 303K | 63.9% | 1 |
| 2026-09-28 | 153K | 245K | 62.6% | 143 |
| 2026-09-25 | 121K | 287K | 42.2% | 35 |
| 2026-09-24 | 151K | 206K | 73.1% | 1,463 |
| 2026-09-23 | 143K | 183K | 78.4% | 0 |
| 2026-09-22 | 150K | 183K | 82.2% | 576 |
| 2026-09-21 | 179K | 222K | 80.7% | 1,160 |
| 2026-09-18 | 275K | 341K | 80.6% | 976 |
| 2026-09-17 | 156K | 194K | 80.3% | 364 |
| 2026-09-16 | 146K | 178K | 82.1% | 24,228 |
| 2026-09-15 | 97K | 161K | 60.2% | 379 |
| 2026-09-14 | 142K | 181K | 78.7% | 10 |
| 2026-09-11 | 131K | 156K | 83.9% | 12 |
| 2026-09-10 | 144K | 183K | 78.7% | 653 |
| 2026-09-09 | 109K | 133K | 82.4% | 4 |
| 2026-09-08 | 138K | 170K | 81.1% | 207 |
| 2026-09-04 | 86K | 116K | 74.1% | 500 |
| 2026-09-03 | 139K | 177K | 78.3% | 0 |
| 2026-09-02 | 179K | 250K | 71.5% | 50 |
| 2026-09-01 | 300K | 349K | 85.9% | 1,284 |
| 2026-08-31 | 215K | 286K | 75.2% | 3,369 |
| 2026-08-28 | 169K | 227K | 74.3% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 14 September 2026, the fails-to-deliver balance in WSO is 470 shares, down 3,858 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (27 July 2026) to 72,434 shares (13 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-14 | 470 | $314.22 | $148K |
| 2026-09-11 | 4,328 | $310.90 | $1.3M |
| 2026-09-10 | 8,070 | $309.75 | $2.5M |
| 2026-09-09 | 3,634 | $316.02 | $1.1M |
| 2026-09-08 | 877 | $315.13 | $276K |
| 2026-09-02 | 7,275 | $314.98 | $2.3M |
| 2026-08-31 | 5,071 | $310.76 | $1.6M |
| 2026-08-28 | 5,652 | $313.05 | $1.8M |
| 2026-08-27 | 7 | $314.39 | $2K |
| 2026-08-26 | 3,093 | $302.29 | $935K |
| 2026-08-20 | 688 | $319.64 | $220K |
| 2026-08-19 | 536 | $313.65 | $168K |
| 2026-08-13 | 72,434 | $309.41 | $22.4M |
| 2026-08-12 | 14,593 | $318.91 | $4.7M |
| 2026-08-05 | 2 | $335.07 | $670 |
| 2026-07-27 | 1 | $362.01 | $362 |
| 2026-07-24 | 18 | $359.85 | $6K |
| 2026-07-16 | 19 | $387.24 | $7K |
| 2026-07-14 | 519 | $393.71 | $204K |
| 2026-07-06 | 5 | $404.71 | $2K |
| 2026-07-01 | 26 | $416.73 | $11K |
| 2026-06-30 | 3,063 | $410.60 | $1.3M |
| 2026-06-29 | 2,621 | $410.74 | $1.1M |
| 2026-06-26 | 9 | $412.19 | $4K |
| 2026-06-25 | 250 | $400.98 | $100K |
| 2026-06-23 | 90 | $397.16 | $36K |
| 2026-06-22 | 846 | $401.04 | $339K |
| 2026-06-11 | 101 | $375.66 | $38K |
| 2026-06-10 | 3,592 | $386.11 | $1.4M |
| 2026-06-08 | 126 | $371.38 | $47K |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONNo open-market insider trades were reported for WSO in the last 90 days. The most recent filings are listed below. Latest filing: Nahmad Aaron J (President) on 2026-03-11.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-03-11 | Nahmad Aaron J | President | J | 25 | $336.95 | $8K | 526 |
| 2026-03-11 | NAHMAD ALBERT H | Chairman and CEO | J | 25 | $336.95 | $8K | 92 |
| 2026-03-11 | MENENDEZ ANA M | CFO / Treasurer | J | 25 | $336.95 | $8K | 2K |
| 2026-03-11 | LOGAN BARRY S | Executive Vice President | J | 19 | $336.95 | $6K | 2K |
| 2025-12-12 | Lopez-Blazquez Ana | Director | Tax withholding | 707 | $354.61 | $251K | 293 |
| 2025-12-12 | Lopez-Blazquez Ana | Director | Option exercise | 1K | $250.84 | $251K | 0 |
| 2025-12-05 | Dickins Denise | Director | Gift | 269 | $0.00 | $0 | 22K |
| 2025-06-10 | Custer John Michael | Director | Sell | 2K | $448.27 | $986K | 4K |
| 2025-05-15 | Dickins Denise | Director | Gift | 191 | $0.00 | $0 | 22K |
| 2025-05-12 | Dickins Denise | Director | Option exercise | 5K | $175.07 | $788K | 0 |
| 2025-05-12 | Dickins Denise | Director | Tax withholding | 2K | $484.84 | $787K | 3K |
| 2025-03-13 | Nahmad Aaron J | President | J | 18 | $473.89 | $9K | 501 |
| 2025-03-13 | NAHMAD ALBERT H | Chairman and CEO | J | 18 | $473.89 | $9K | 67 |
| 2025-03-13 | MENENDEZ ANA M | CFO / Treasurer | J | 18 | $473.89 | $9K | 2K |
| 2025-03-13 | LOGAN BARRY S | Executive Vice President | J | 13 | $473.89 | $6K | 2K |
| 2025-03-05 | ALVAREZ CESAR L | Director | Option exercise | 400 | $175.07 | $70K | 400 |
| 2025-03-05 | ALVAREZ CESAR L | Director | Sell | 1K | $500.00 | $711K | 0 |
| 2025-03-05 | ALVAREZ CESAR L | Director | Option exercise | 1K | $175.07 | $249K | 0 |
| 2025-03-05 | ALVAREZ CESAR L | Director | Sell | 679 | $498.92 | $339K | 0 |
| 2025-03-05 | ALVAREZ CESAR L | Director | Option exercise | 679 | $175.07 | $119K | 0 |
| 2024-12-18 | LOGAN BARRY S | Executive Vice President | Sell | 11K | $508.21 | $5.6M | 0 |
| 2024-12-14 | LOGAN BARRY S | Executive Vice President | Tax withholding | 72K | $509.75 | $36.6M | 30K |
| 2024-09-03 | Dickins Denise | Director | Gift | 60 | $0.00 | $0 | 19K |
| 2024-08-05 | Dickins Denise | Director | Gift | 440 | $0.00 | $0 | 19K |
| 2024-06-06 | Custer John Michael | Director | Option exercise | 2K | $260.28 | $434K | 2K |
| 2024-05-10 | LOGAN BARRY S | Executive Vice President | Sell | 774 | $473.85 | $367K | 2K |
| 2024-05-09 | Macdonald John Alexander | Director | Sell | 1K | $465.43 | $465K | 0 |
| 2024-05-09 | Macdonald John Alexander | Director | Option exercise | 3K | $260.28 | $868K | 0 |
| 2024-05-09 | Macdonald John Alexander | Director | Option exercise | 1K | $165.61 | $166K | 0 |
| 2024-05-09 | Macdonald John Alexander | Director | Sell | 647 | $466.78 | $302K | 0 |
| 2024-05-09 | Macdonald John Alexander | Director | Sell | 3K | $465.75 | $1.2M | 0 |
| 2024-05-09 | Macdonald John Alexander | Director | Sell | 1K | $468.94 | $469K | 1K |
| 2024-05-09 | Macdonald John Alexander | Director | Sell | 5 | $467.83 | $2K | 0 |
| 2024-05-06 | Dickins Denise | Director | Option exercise | 9K | $160.69 | $1.4M | 0 |
| 2024-05-06 | Dickins Denise | Director | Tax withholding | 3K | $472.35 | $1.4M | 6K |
| 2024-03-11 | NAHMAD ALBERT H | Chairman and CEO | J | 19 | $428.47 | $8K | 49 |
| 2024-03-11 | Nahmad Aaron J | President | J | 19 | $428.47 | $8K | 483 |
| 2024-03-11 | LOGAN BARRY S | Executive Vice President | J | 18 | $428.47 | $8K | 3K |
| 2024-03-11 | MENENDEZ ANA M | CFO / Treasurer | J | 19 | $428.47 | $8K | 2K |
| 2024-02-26 | Dickins Denise | Director | Gift | 202 | $0.00 | $0 | 14K |
| 2023-12-12 | ALVAREZ CESAR L | Director | Sell | 5K | $412.34 | $2.1M | 0 |
| 2023-12-12 | ALVAREZ CESAR L | Director | Option exercise | 5K | $160.69 | $803K | 0 |
| 2023-06-06 | Custer John Michael | Director | Tax withholding | 1K | $345.02 | $434K | 410 |
| 2023-06-06 | Custer John Michael | Director | Option exercise | 2K | $260.28 | $434K | 0 |
| 2023-06-05 | NAHMAD ALBERT H | Chairman and CEO | Gift | 1K | $0.00 | $0 | 0 |
| 2023-05-22 | ALVAREZ CESAR L | Director | Sell | 4K | $332.64 | $1.3M | 0 |
| 2023-05-22 | ALVAREZ CESAR L | Director | Option exercise | 4K | $185.12 | $740K | 0 |
| 2023-03-13 | NAHMAD ALBERT H | Chairman and CEO | J | 30 | $249.40 | $7K | 30 |
| 2023-03-13 | Nahmad Aaron J | President | J | 30 | $249.40 | $7K | 464 |
| 2023-03-13 | LOGAN BARRY S | Executive Vice President | J | 30 | $249.40 | $7K | 3K |
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.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON6 holders report 5% or more of WSO in their latest filing, all on Schedule 13G (passive). The largest reported stake is Capital International Investors at 10.1% of the class (3,540,962 shares), filed 2026-05-14 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-14 | 13G/Ano. 3 | Capital International Investorsinvestment adviser | 3.5M | 10.1% | 2026-03-31 |
| 2026-05-14 | 13G | Capital Research Global Investorsinvestment adviser | 1.9M | 5.4% | 2026-03-31 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 1.8M | 5.2% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 1.8M | 5.0% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 4 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-05 | 13G/Ano. 2 | FMR LLCparent holding company | 2.0M | 5.6% | 2025-12-31 |
| 2026-02-05 | 13G/Ano. 2 | Abigail P. Johnsonindividual | 2.0M | 5.6% | 2025-12-31 |
13F holders
Tracked managers holding WSO at their latest 13F. JSON7 of the 30 tracked managers held WSO at their latest 13F, $169.0M in total at quarter-end prices. Renaissance Technologies is the largest at $63.0M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 151K | $63.0M | 0.09% | -65K |
| Two Sigma Investments | 2026-06-30 | 96K | $39.9M | 0.03% | -204K |
| AQR Capital Management | 2026-06-30 | 71K | $29.6M | 0.01% | +50K |
| Bridgewater Associates | 2026-06-30 | 48K | $20.0M | 0.08% | new |
| Citadel Advisors | 2026-06-30 | 31K | $12.8M | 0.00% | +14K |
| Millennium Management | 2026-06-30 | 9K | $3.5M | 0.00% | -38K |
| Fisher Asset Management | 2026-06-30 | 620 | $259K | 0.00% | -47 |
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 Q2 FY 2026 (quarter ended 2026-06-30) Watsco reported revenue of $2.10B, up 2.1% from the same quarter a year earlier, and net income of $163.3M (4.00 diluted EPS). In FY 2025 it generated $569.6M of operating cash flow and spent $473.8M on dividends.
- Cash
- $364.2M
- Equity
- $2.99B
- Total assets
- $5.08B
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $2.10B | $163.3M | 7.8% | 4.00 |
| Q1 FY 2026 | 2026-03-31 | $1.53B | $79.1M | 5.2% | 1.87 |
| Q4 FY 2025derived | 2025-12-31 | $1.58B | $71.7M | 4.5% | n/a |
| Q3 FY 2025 | 2025-09-30 | $2.07B | $161.6M | 7.8% | 3.98 |
| Q2 FY 2025 | 2025-06-30 | $2.06B | $183.6M | 8.9% | 4.52 |
| Q1 FY 2025 | 2025-03-31 | $1.53B | $80.1M | 5.2% | 1.93 |
| Q4 FY 2024derived | 2024-12-31 | $1.75B | $96.8M | 5.5% | n/a |
| Q3 FY 2024 | 2024-09-30 | $2.16B | $171.0M | 7.9% | 4.22 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $7.24B | $497.0M | $569.6M | $34.5M | n/a | $473.8M |
| FY 2024 | 2024-12-31 | $7.62B | $536.3M | $773.1M | $30.1M | n/a | $423.5M |
| FY 2023 | 2023-12-31 | $7.28B | $536.3M | $562.0M | $35.5M | n/a | $382.6M |
| FY 2022 | 2022-12-31 | $7.27B | $601.2M | $572.0M | $35.7M | n/a | $332.4M |
| FY 2021 | 2021-12-31 | $6.28B | $418.9M | $349.6M | $25.5M | n/a | $294.5M |
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 2026-06-30.
What this page is
Watsco 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 Watsco (WSO), SEC CIK 105016, listed on NYSE, classified by the SEC as wholesale-hardware & plumbing & heating equipment & supplies. 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 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.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 2026-05-14.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 2026-06-30.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 2026-07-29.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 2026-03-11.JSON and CSV
- Company record
- EDGAR filing index for CIK 105016Ticker, 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 WSO is sold short?
What is WSO's daily short volume?
Does WSO have fails to deliver?
Are WSO insiders buying or selling?
Who owns 5% or more of WSO?
What did WSO report last quarter?
Which tracked 13F managers own WSO?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.