Who owns Tower Semiconductor (TSEM)?
96 holders named in SEC filings declare between 41.0% and 54.3% of Tower Semiconductor's shares outstanding, as of Aug 11, 2026. The largest are T. Rowe Price (6.2%), Clal Insurance Enterprises Holdings Ltd (4.1%) and Vanguard (3.9%); the five largest hold 20.4% together. Another 354 institutions hold small positions worth 2.4%. At least 43.3% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 10.4% and sold 16.4% of the shares, a net sale of 5.9%; 118 opened a position, 106 added, 161 reduced and 49 sold out. Biggest buyers: Jane Street (+1.7M shares) and ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (+928,208 shares). Biggest sellers: MEITAV INVESTMENT HOUSE LTD (-1.8M) and WT Asset Management Ltd (-1.5M). Schedule 13D/G filings since Mar 31, 2026: Migdal Insurance & Financial Holdings Ltd. crossed 5% (6.0%) on Jun 30, 2026, Harel Insurance Investments & Financial Services Ltd. raised its stake to 5.1% on Jun 10, 2026 and Phoenix Financial Ltd. crossed 5% (5.0%) on Jun 5, 2026. Directors and officers, from their latest Form 4: Russell Craig Ellwanger (0.47%). Over time, 438 managers declared Tower Semiconductor in their 13F for Q2 2026, against 128 for Q4 2019: together at most 56.1% of the shares outstanding, against 55.4%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| T. Rowe Price | 13F | 6.2% | Jun 30, 2026 | Q3 2025 |
| Clal Insurance Enterprises Holdings Ltd | 13F | 4.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 3.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Phoenix Financial Ltd. | 13F | 3.1% | Jun 30, 2026 | Q4 2019 or earlier |
| BlackRock | 13F | 2.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Jane Street | 13F | 2.6% | Jun 30, 2026 | Q4 2022 |
| Harel Insurance Investments & Financial Services Ltd. | 13F | 2.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Capital Group | 13F | 1.7% | Jun 30, 2026 | Q4 2025 |
| Senvest Management, LLC | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Migdal Insurance & Financial Holdings Ltd. | 13F | 1.5% | Jun 30, 2026 | Q4 2019 or earlier |
| Janus Henderson | 13F | 1.3% | Jun 30, 2026 | Q4 2023 |
| Invesco | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Mawer Investment Management Ltd. | 13F | 0.92% | Jun 30, 2026 | Q1 2026 |
| Polar Capital Holdings Plc | 13F | 0.90% | Jun 30, 2026 | Q4 2025 |
| Y.D. More Investments Ltd | 13F | 0.84% | Jun 30, 2026 | Q3 2023 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 13F | 0.82% | Jun 30, 2026 | Q2 2026 |
| Fidelity (FMR) | 13F | 0.82% | Jun 30, 2026 | Q4 2019 or earlier |
| Millennium | 13F | 0.76% | Jun 30, 2026 | Q3 2020 |
| Marshall Wace | 13F | 0.69% | Jun 30, 2026 | Q4 2025 |
| Norges Bank | 13F | 0.68% | Jun 30, 2026 | Q4 2019 or earlier |
| Goldman Sachs | 13F | 0.64% | Jun 30, 2026 | Q4 2019 or earlier |
| D. E. Shaw | 13F | 0.61% | Jun 30, 2026 | Q2 2025 |
| Qube Research & Technologies Ltd | 13F | 0.57% | Jun 30, 2026 | Q1 2024 |
| Two Sigma | 13F | 0.54% | Jun 30, 2026 | Q4 2023 |
| Russell Craig Ellwanger | Form 4 | 0.47% | Aug 11, 2026 | — |
Tower Semiconductor institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 128 | 55.4% | $1.4B | 89.2% |
| Q4 2020 | 135 | 56.5% | $1.6B | 90.4% |
| Q4 2021 | 149 | 55.3% | $2.4B | 88.6% |
| Q4 2022 | 213 | 59.3% | $2.8B | 84.0% |
| Q4 2023 | 178 | 58.2% | $2.0B | 84.2% |
| Q4 2024 | 233 | 62.8% | $3.6B | 86.5% |
| Q4 2025 | 304 | 65.1% | $8.6B | 80.0% |
| Q2 2026 | 438 | 56.1% | $16.4B | 74.5% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.