CIK: 0000919530
Total reported value
$754.3M
Reporting period: 2026-03-31 · Number of holdings: 174
JOHN G ULLMAN & ASSOCIATES INC disclosed 174 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $754.3M and a quarterly turnover rate of 17.9%.
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John G Ullman & Associates INC's disclosed holdings carry a Herfindahl concentration index of 0.019 — mathematically equivalent to about 52 equally-sized positions, well below its 174 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.53), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Add GLW
-16.6% $9.9M
Add BE
-5.4% $5.5M
Add 30231g102
-0.4% $5.1M
Trim MSFT
-7.3% -$4.4M
Trim EMR
-9.6% -$4.0M
Trim IBM
-8.6% -$3.6M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | GLW | Corning INC | Stock-Tech | 5.76% | +1.28% | -16.63% | |
| 2 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 5.41% | +0.26% | -4.95% | |
| 3 | EMR | Emerson Electric Co | Stock-Industrials | 4.35% | -0.55% | -9.63% | |
| 4 | ✓ | Cisco Systems, Inc. | Stock-Other | 3.30% | — | -2.80% | |
| 5 | OGE | Oge Energy CORP | Stock-Utilities | 3.09% | +0.25% | -2.74% | |
| 6 | ✓ | Te Connectivity PLC | Stock-Other | 2.64% | -0.36% | -3.53% | |
| 7 | ✓ | Broadcom Inc. | Stock-Other | 2.39% | -0.49% | -6.79% | |
| 8 | ✓ | Exxon Mobil Corporation | Stock-Other | 2.36% | +0.67% | -0.38% | |
| 9 | BE | Bloom Energy Corp- A | Stock-Industrials | 2.26% | +0.72% | -5.36% | |
| 10 | ✓ | Essential Utils INC | Stock-Other | 2.15% | — | -0.47% | |
| 11 | ✓ | NextEra Energy, Inc. | Stock-Other | 1.85% | +0.20% | -2.91% | |
| 12 | SLB | Slb LTD | Stock-Energy | 1.82% | +0.44% | -1.38% | |
| 13 | ✓ | Eversource Energy | Stock-Other | 1.78% | — | -0.52% | |
| 14 | AMZN | Amazon.com INC | Stock-Consumer Disc | 1.75% | -0.32% | -6.02% | |
| 15 | ✓ | Dominion Energy, Inc. | Stock-Other | 1.63% | +0.12% | +2.63% | |
| 16 | ✓ | Merck & Co., Inc. | Stock-Other | 1.50% | — | -6.96% | |
| 17 | POR | Portland General Electric Co | Stock-Utilities | 1.50% | +0.11% | -1.57% | |
| 18 | ✓ | American Tower Corporation | Stock-Other | 1.45% | — | +3.33% | |
| 19 | GNRC | Generac Holdings INC | Stock-Industrials | 1.44% | +0.39% | -3.52% | |
| 20 | IBM | Intl Business Machines CORP | Stock-Tech | 1.43% | -0.49% | -8.57% | |
| 21 | MSFT | Microsoft CORP | Stock-Tech | 1.42% | -0.60% | -7.27% | |
| 22 | LNN | Lindsay CORP | Stock-Other | 1.40% | +0.11% | +7.42% | |
| 23 | CACI | Caci International INC -cl A | Stock-Tech | 1.33% | — | -2.38% | |
| 24 | ✓ | Eqt CORP Com | Stock-Other | 1.26% | +0.22% | +2.87% | |
| 25 | ✓ | Flowserve CORP | Stock-Other | 1.22% | — | -9.74% | |
| 26 | WDC | Western Digital CORP | Stock-Tech | 1.18% | -0.30% | -48.75% | |
| 27 | BMY | Bristol-myers Squibb Co | Stock-Healthcare | 1.16% | — | -3.58% | |
| 28 | ASTE | Astec Industries INC | Stock-Other | 1.09% | — | -13.41% | |
| 29 | ECG | Everus Construction Group | Stock-Industrials | 1.06% | +0.19% | -11.32% | |
| 30 | DIS | Walt Disney Co/the | Stock-Comm Services | 1.06% | — | +12.05% | |
| 31 | MDU | Mdu Resources Group INC | Stock-Utilities | 1.03% | — | -3.28% | |
| 32 | ITRI | Itron INC | Stock-Tech | 0.96% | +0.23% | +37.45% | |
| 33 | GRC | Gorman-rupp Co | Stock-Other | 0.93% | +0.21% | -0.81% | |
| 34 | GVA | Granite Construction INC | Stock-Industrials | 0.92% | -0.24% | -23.10% | |
| 35 | HON | Honeywell International INC | Stock-Industrials | 0.88% | +0.11% | -0.76% | |
| 36 | NJR | New Jersey Resources CORP | Stock-Utilities | 0.85% | +0.11% | -2.36% | |
| 37 | VMC | Vulcan Materials Co | Stock-Materials | 0.82% | -0.12% | -7.99% | |
| 38 | ✓ | Jazz Pharmaceuticals PLC | Stock-Other | 0.82% | — | -4.56% | |
| 39 | ✓ | BCE Inc. | Stock-Other | 0.81% | — | +3.69% | |
| 40 | ✓ | Alphabet Inc. | Stock-Other | 0.81% | -0.11% | -4.37% | |
| 41 | PFE | Pfizer INC | Stock-Healthcare | 0.80% | +0.12% | +3.89% | |
| 42 | INTC | Intel CORP | Stock-Tech | 0.78% | — | -25.27% | |
| 43 | ✓ | Eagle Materials INC | Stock-Other | 0.74% | — | +3.41% | |
| 44 | ✓ | Equinor ASA | Stock-Other | 0.73% | +0.32% | +1.05% | |
| 45 | TMP | Tompkins Financial CORP | Stock-Other | 0.72% | — | -17.46% | |
| 46 | TMO | Thermo Fisher Scientific INC | Stock-Healthcare | 0.72% | -0.19% | -7.02% | |
| 47 | IDA | Idacorp INC | Stock-Utilities | 0.68% | — | -5.38% | |
| 48 | STT | State Street CORP | Stock-Financials | 0.66% | — | -4.88% | |
| 49 | ✓ | Vaneck Vietnam ETF | ETF-Other | 0.66% | — | -1.21% | |
| 50 | SYY | Sysco CORP | Stock-Consumer Staples | 0.66% | — | +0.69% |
Performance for Q3 2026
-1.2%
Performance Last 4 Quarters
+50.1%
Based on 52% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 174 | $754.3M | 18 | |
| 2025-12-31 | 179 | $750.0M | 14 | |
| 2025-09-30 | 173 | $742.7M | 35 | |
| 2025-06-30 | 174 | $673.8M | 0 | |
| 2025-03-31 | 170 | $648.4M | 100 | |
| 2024-12-31 | 172 | $679.6M | 0 | |
| 2024-09-30 | 179 | $695.5M | 0 | |
| 2024-06-30 | 179 | $655.5M | 0 | |
| 2024-03-31 | 174 | $651.8M | 0 | |
| 2023-12-31 | 169 | $630.5M | 0 | |
| 2023-09-30 | 173 | $611.3M | 0 | |
| 2023-06-30 | 177 | $648.1M | 0 | |
| 2023-03-31 | 177 | $643.0M | 0 | |
| 2022-12-31 | 169 | $627.2M | 0 | |
| 2022-09-30 | 157 | $571.5M | 0 | |
| 2022-06-30 | 157 | $623.2M | 0 | |
| 2022-03-31 | 168 | $721.7M | 0 | |
| 2021-12-31 | 162 | $727.1M | 0 | |
| 2021-09-30 | 160 | $735.3M | 0 | |
| 2021-06-30 | 156 | $767.6M | 100 | |
| 2021-03-31 | 154 | $745.4M | 21 | |
| 2020-12-31 | 152 | $645.1M | 32 | |
| 2020-09-30 | 128 | $483.2M | 21 | |
| 2020-06-30 | 109 | $409.8M | 26 | |
| 2020-03-31 | 101 | $377.0M | 50 | |
| 2019-12-31 | 142 | $580.9M | 18 | |
| 2019-09-30 | 144 | $550.6M | 21 | |
| 2019-06-30 | 148 | $568.6M | 20 | |
| 2019-03-31 | 128 | $552.3M | 21 | |
| 2018-12-31 | 129 | $495.8M | 51 | |
| 2018-09-30 | 129 | $550.0M | 19 | |
| 2018-06-30 | 114 | $528.8M | 14 | |
| 2018-03-31 | 114 | $517.2M | 15 | |
| 2017-12-31 | 115 | $501.3M | 18 | |
| 2017-09-30 | 109 | $512.9M | 18 | |
| 2017-06-30 | 114 | $504.0M | 16 | |
| 2017-03-31 | 117 | $483.7M | 18 | |
| 2016-12-31 | 120 | $477.3M | 17 | |
| 2016-09-30 | 116 | $486.2M | 18 | |
| 2016-06-30 | 117 | $487.0M | 18 | |
| 2016-03-31 | 105 | $426.2M | 26 | |
| 2015-12-31 | 115 | $452.6M | 21 | |
| 2015-09-30 | 122 | $421.5M | 34 | |
| 2015-06-30 | 145 | $531.2M | 12 | |
| 2015-03-31 | 141 | $526.2M | 14 | |
| 2014-12-31 | 145 | $531.1M | 19 | |
| 2014-09-30 | 148 | $519.9M | 13 | |
| 2014-06-30 | 152 | $547.5M | 12 | |
| 2014-03-31 | 147 | $539.9M | 13 | |
| 2013-12-31 | 149 | $523.8M | 13 | |
| 2013-09-30 | 151 | $491.1M | 12 | |
| 2013-06-30 | 150 | $478.9M | — |
John G Ullman & Associates INC's most significant position changes for 2026-03-31: Sold out: Sandisk CORP (SNDK); New buy: Mercadolibre INC (MELI); New buy: Mohawk Industries INC (MHK); Trim: Corning INC (GLW) — shares -16.63%; Trim: Bloom Energy Corp- A (BE) — shares -5.36%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GLW | Corning INC | +1.3% | -16.63% | Trim |
| 2 | BE | Bloom Energy Corp- A | +0.7% | -5.36% | Trim |
| 3 | ✓ | Exxon Mobil Corporation | +0.7% | -0.38% | Trim |
| 4 | SLB | Slb LTD | +0.4% | -1.38% | Trim |
| 5 | GNRC | Generac Holdings INC | +0.4% | -3.52% | Trim |
| 6 | ✓ | Equinor ASA | +0.3% | +1.05% | Add |
| 7 | TSM | Taiwan Semiconductor-sp Adr | +0.3% | -4.95% | Trim |
| 8 | OGE | Oge Energy CORP | +0.3% | -2.74% | Trim |
| 9 | ITRI | Itron INC | +0.2% | +37.45% | Add |
| 10 | ✓ | Eqt CORP Com | +0.2% | +2.87% | Add |
| 11 | TWLO | Twilio INC - A | +0.2% | +78.84% | Add |
| 12 | GRC | Gorman-rupp Co | +0.2% | -0.81% | Trim |
| 13 | ✓ | NextEra Energy, Inc. | +0.2% | -2.91% | Trim |
| 14 | ECG | Everus Construction Group | +0.2% | -11.32% | Trim |
| 15 | EHC | Encompass Health CORP | +0.1% | +47.18% | Add |
| 16 | CIEN | Ciena CORP | +0.1% | -24.85% | Trim |
| 17 | ✓ | Dominion Energy, Inc. | +0.1% | +2.63% | Add |
| 18 | PFE | Pfizer INC | +0.1% | +3.89% | Add |
| 19 | NJR | New Jersey Resources CORP | +0.1% | -2.36% | Trim |
| 20 | HON | Honeywell International INC | +0.1% | -0.76% | Trim |
| 21 | POR | Portland General Electric Co | +0.1% | -1.57% | Trim |
| 22 | ✓ | Argan Inc | +0.1% | -4.17% | Trim |
| 23 | LNN | Lindsay CORP | +0.1% | +7.42% | Add |
| 24 | HAL | Halliburton Co | +0.1% | -2.26% | Trim |
| 25 | LITE | Lumentum Holdings INC | -0.1% | -66.44% | Trim |
| 26 | ✓ | Alphabet Inc. | -0.1% | -4.37% | Trim |
| 27 | LLY | Eli Lilly & Co | -0.1% | -17.61% | Trim |
| 28 | ABT | Abbott Laboratories | -0.1% | -2.69% | Trim |
| 29 | VMC | Vulcan Materials Co | -0.1% | -7.99% | Trim |
| 30 | AAPL | Apple INC | -0.1% | -14.35% | Trim |
| 31 | ✓ | Oracle Corporation | -0.2% | -17.47% | Trim |
| 32 | ✓ | Nexstar Broadcasting | -0.2% | -14.42% | Trim |
| 33 | TMO | Thermo Fisher Scientific INC | -0.2% | -7.02% | Trim |
| 34 | SNOW | Snowflake INC | -0.2% | -3.99% | Trim |
| 35 | ✓ | Salesforce, Inc. | -0.2% | -30.10% | Trim |
| 36 | MANH | Manhattan Associates INC | -0.2% | -81.69% | Trim |
| 37 | GVA | Granite Construction INC | -0.2% | -23.10% | Trim |
| 38 | ✓ | PayPal Holdings, Inc. | -0.3% | -82.36% | Trim |
| 39 | AMGN | Amgen INC | -0.3% | -75.85% | Trim |
| 40 | WDC | Western Digital CORP | -0.3% | -48.75% | Trim |
| 41 | AMZN | Amazon.com INC | -0.3% | -6.02% | Trim |
| 42 | ✓ | Te Connectivity PLC | -0.4% | -3.53% | Trim |
| 43 | ✓ | Adobe Inc. | -0.5% | -72.56% | Trim |
| 44 | IBM | Intl Business Machines CORP | -0.5% | -8.57% | Trim |
| 45 | ✓ | Broadcom Inc. | -0.5% | -6.79% | Trim |
| 46 | EMR | Emerson Electric Co | -0.6% | -9.63% | Trim |
| 47 | MSFT | Microsoft CORP | -0.6% | -7.27% | Trim |
| 48 | SNDK | Sandisk CORP | — | EXIT | Sold out |
| 49 | MELI | Mercadolibre INC | — | NEW | New buy |
| 50 | MHK | Mohawk Industries INC | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-06 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-05 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-05 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-29 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-06 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-05 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-08 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-08 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-06 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-31 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-01 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-21 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-05 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-08 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-10-19 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-27 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-04-29 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-26 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-02 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-23 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-04-22 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-05 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-06 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-07-29 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-04-14 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-01-29 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-10-21 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-02 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-04-30 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-01-29 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-02 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-23 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-19 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-01-31 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-03 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-07-26 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-04-25 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-01-20 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-10-20 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-07-22 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-04-27 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-11 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-10-23 | Amendment | View on EDGAR |
| 2015-09-30 | 2015-10-21 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-11 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-01-26 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-12 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-18 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-07 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-03 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-04 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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