Stock price history — Tower Semiconductor
As of: 2026-04-29 (last close 2026-04-29: $191.54)
Data source:
companies/tsem/data/STOCK_PRICE_DATA.json(current snapshot ✓) andcompanies/tsem/data/price_history.json(2,514 daily bars 2016-04-29 to 2026-04-29 ✓). Auto-refreshed on the standard data pipeline.Confidence legend: ✓ verified-primary · ◐ partial / aggregator · ⚠ inferred / estimate
1. Snapshot (2026-04-29 close)
| Metric | Value |
|---|---|
| Last close | $191.54 ✓ |
| Day’s change | −1.04% |
| 52-week high (intraday) | $228.73 (2026-04-20) ✓ |
| 52-week low (intraday) | $34.73 ✓ |
| 52w peak-to-trough range | 6.59× (559% peak vs. trough) |
| All-time high (closing) | $226.45 (2026-04-17) ✓ |
| All-time high (intraday) | $228.73 (2026-04-20) ✓ |
| All-time low (closing, since 2016-04-29) | $11.05 (2016-05-12) ✓ |
| 20-day avg volume | ~1,500,000 ◐ |
| Day’s volume | 203,782 ✓ |
| Beta (5-yr) | 1.4 ◐ |
| Market cap | ~$21.4B ✓ |
| Shares outstanding | 111,756,623 ✓ |
| Float | ~110M (per STOCK_PRICE_DATA.json) ◐ |
| Insider % | ~0.5% ◐ |
| Institutional % | ~65% ◐ |
Read. TSEM at $191.54 sits ~15.5% off the all-time closing high ($226.45) reached on 2026-04-17. The recent compression is consistent with a post-blow-off cooling after a +90% Q1 2026 rally. The 5-year beta of 1.4 is moderate for a US-listed specialty foundry but understates the realized vol of the past 18 months; the 52w range is a 6.6× peak-to-trough spread driven by the AI-photonics premium emergence.
2. Year-end anchors (per price_history.json)
| Year-end | Close | YoY % | Annual range (low/high) |
|---|---|---|---|
| 2016-12-30 | $19.03 ✓ | — (partial year from Apr 2016) | $11.03 / $20.04 |
| 2017-12-29 | $34.08 ✓ | +79.1% | $19.02 / $36.69 |
| 2018-12-31 | $14.74 ✓ | -56.7% (cyclical de-rate, Aug-Oct 2018 collapse) | $13.56 / $36.08 |
| 2019-12-31 | $24.06 ✓ | +63.2% | $13.57 / $25.15 |
| 2020-12-31 | $25.82 ✓ | +7.3% (COVID round-trip; Mar 2020 panic low $12.13) | $12.13 / $27.28 |
| 2021-12-31 | $39.68 ✓ | +53.7% (specialty-foundry rally) | $24.81 / $40.45 |
| 2022-12-30 | $43.20 ✓ | +8.9% (Intel-deal-spread anchor year) | $31.04 / $49.13 |
| 2023-12-29 | $30.52 ✓ | -29.4% (deal collapse Aug 16, trough Oct 16 at $21.91) | $21.43 / $45.87 |
| 2024-12-31 | $51.51 ✓ | +68.8% (standalone re-rate + ST-Agrate ramp) | $28.02 / $54.27 |
| 2025-12-31 | $117.42 ✓ | +128.0% (AI-photonics premium emerges) | $28.64 / $129.58 |
| 2026-04-29 (current) | $191.54 ✓ | +63.1% YTD 2026 | $108.43 / $228.73 |
The 2025-2026 compounded re-rate is exceptional. From the 2024-12-31 close of $51.51 to the 2026-04-29 close of $191.54, TSEM is +272% over 16 months — outpacing nearly every NASDAQ-listed semis name except the AI mega-caps. The drivers compound: (1) Tower-ST Agrate productization, (2) recovering RF / specialty cycle, (3) AI-photonics premium (PH18 + Tower-Coherent OFC anticipation), (4) the LWLG development agreement (announced 2026-03-11) which crystallized the polymer-modulator narrative.
3. Major price phases — 2016 to today
Phase 1: Pre-Intel base (Apr 2016 – Feb 2022)
- 2016-05-12 closing low $11.05 — the multi-year structural floor.
- 2017 ramp to $34 on TPSCo-flip optimism + capacity-tightening prelude.
- 2018-Q3/Q4 cyclical collapse: 2018-07-26 −14.5% on tepid guide; 2018-10-29 −21.2% on broad semi de-rate (single-day move); year-end close $14.74.
- 2019-2020: range-bound $13-$27; COVID March 2020 lows $12.13 (revisit of 2018 trough).
- 2021 specialty-foundry rally to ~$40 by year-end as the post-COVID supply crunch lifted RF / power-management ASPs.
- Pre-Intel-announcement closing range $31-$40 through Jan-Feb 2022.
Phase 2: Intel deal pendency (Feb 15 2022 – Aug 16 2023)
- 2022-02-14 (Mon): $33.13 close.
- 2022-02-15 (Tue): gap-up to $47.07 on +42.1% in one day (volume 19.69M shares — 30× normal). Intel announced the $5.4B / $53.00/sh all-cash acquisition before the open. ✓ Intel press release / 8-K — Intel to Acquire Tower Semiconductor.
- The post-announcement spread was structurally wide. Tower never traded near the $53 deal price — the closing high during the 18-month pendency was $49.13 (mid-2022). Spread persistence reflected the China SAMR antitrust-clearance overhang.
- 2022 closing range $33-49 post-announcement; 2022-12-30 close $43.20 (~$10 / ~19% spread to deal price).
- 2023 closing range $30-46 as deal-completion probability degraded through Q1-Q2 2023.
- 2023-08-16: −10.7% on 11.83M shares (16× normal volume). Intel and Tower mutually terminated the merger after the China-SAMR-clearance deadline lapsed. Intel paid Tower a $353M reverse-termination fee. ✓ Intel 8-K 2023-08-16 termination.
- 2023-10-16: closing trough $21.91 — the post-deal-collapse capitulation. From the deal-announcement gap-up close of $47.07 to the trough $21.91 is a −53% drawdown over 20 months.
- See intel deal collapse for the analyst post-mortem.
Phase 3: Standalone re-rate (Aug 2023 – Dec 2024)
- 2023 closing low $21.43 in October; year-end $30.52.
- 2024-02-14: +11.4% on $3.18M shares — Q4 2023 results-led recovery rally; first signal that the standalone narrative had legs.
- 2024 saw progressive recovery as Tower-ST Agrate first wafers reached commercial production (tower st agrate) and the RF / SiGe BiCMOS cycle bottomed.
- 2024-11-13: +12.3% on $2.45M shares — Q3 2024 print + commentary on AI-adjacent SiPh / SiGe pipeline.
- 2024 closing year-end $51.51 (+68.8%) — Tower fully recovered the pre-Intel level and broke out toward the 2022 deal-spread highs.
Phase 4: AI-photonics premium emerges (Jan 2025 – Dec 2025)
- 2025 opened at $51.55 on 2025-01-02.
- 2025-01-27: −16.9% on $2.24M shares — sharp pullback (mid-cycle profit-taking; possible DeepSeek R1 model-efficiency anxiety bleeding into mature-node-SiPh demand assumptions ⚠).
- 2025-04-03 / 2025-04-09: −15.4% / +14.2% — round-trip during the Apr 2025 broad-market correction; trough close $30.90.
- 52w intraday low of $34.73 likely traces to the early-Q2 2025 capitulation window.
- 2025-08-04: +14.1% on $2.28M shares — Q2 2025 results print + AI-photonics commentary inflection.
- 2025-11-10: +16.7% on $5.27M shares — Q3 2025 print + 2025-11-12 6-K announcement of “New CPO Foundry Technology Available On Tower’s Leading SiPho and EIC Optical Platforms” (Tower press release ✓). This is the AI-photonics-premium ignition event — Tower formally pitched itself as a CPO foundry counterpart to GF Fotonix.
- 2025 closing year-end $117.42 (+128%); intraday high $129.58 reached late-2025.
Phase 5: 2026 blow-off + cool-down (Jan 2026 – present)
- 2026-01-02 open $121.74; closing range $108-$140 through Q1.
- 2026-02-04: −11.1% on $4.04M shares — single-day pullback amid broad-tech volatility.
- 2026-03-02: +11.0% on $2.72M shares — Q4 2025 results (likely 2026-02-17 6-K) follow-through.
- 2026-03-16: +11.0% on $4.00M shares — coincides with LWLG-Tower PH18 development agreement announcement (2026-03-11) crystallizing in market positioning.
- 2026-03-19: +17.0% on $7.94M shares — the largest single-day percentage gain since the Intel-deal-announcement gap. Likely catalyst: combination of OFC 2026 (March 16-20 conference week) demo expectations + LWLG-narrative + Q1 2026 anticipation. ✓ verified daily-bar; ⚠ specific catalyst attribution to be confirmed against day’s 6-K + press flow.
- 2026-03-31: +10.7% on $3.41M shares — momentum continuation into quarter-end (likely AI-photonics short squeeze; coincides with the same-day jump in FINRA short interest to 3.79M shares — see
./short_interest_history). - 2026-04-17: closing all-time high $226.45.
- 2026-04-20: intraday all-time high $228.73; closing $224.49.
- 2026-04-21 to 2026-04-29: cool-down to $191.54 (-15% from ATH close). Volume normalized.
4. Technical levels worth tracking
| Level | Type | Notes |
|---|---|---|
| $228.73 | ATH intraday (2026-04-20) | Untested resistance |
| $226.45 | ATH close (2026-04-17) | Prior-week resistance |
| ~$200 | Round-number psychological | Recent breakdown level |
| $191.54 | Spot | Current price |
| ~$175 | 2026-Q1 mid-March consolidation | Near-term support |
| $129.58 | 2025 intraday high | Multi-month support if broken |
| $117.42 | 2025 year-end close | Major structural floor for 2026 |
| $51.51 | 2024 year-end close | Pre-AI-photonics-premium baseline |
| $43.20 | 2022 year-end close (post-Intel-announcement) | Deal-anchor level |
| $33.27 | 2023 deal-collapse-window trough close | Verified: closest-to-claim ⚠ — actual closing trough was $21.91 (2023-10-16); $33.27 may have been intra-pendency low |
| $21.91 | Post-deal-collapse closing trough (2023-10-16) | Verified ✓; ATL of the modern era |
| $11.05 | All-time closing low (2016-05-12) | Historical floor |
Note on the “$33.27 trough” claim. The agent brief flagged this as a “low-volume October 2022 / 2023 (verify)” reference. The verified closing trough during the Intel-deal pendency was $21.91 on 2023-10-16 (per
price_history.json); the pre-deal-announcement low in early 2022 was $31.83 on 2022-01-27. The $33.27 figure does not match any single-day close in the verified daily-bar series — likely an aggregator error or refers to a specific weekly average. Flagging ⚠ for primary-source cleanup.
5. Volatility profile
TSEM’s quoted 5-year beta of ~1.4 is moderate for a US-listed specialty foundry but understates realized vol over the AI-photonics premium emergence window. Realized 30-day annualized volatility (estimated from daily bars) is approximately 55-75% through 2026 ⚠ — elevated relative to the more sedate 30-40% characteristic of the 2018-2023 period.
The 6.6× 52-week peak-to-trough spread is the largest in TSEM’s modern history. Comparable swings:
- 2018 cyclical drawdown: $36.08 → $13.56 = 2.7× spread
- COVID 2020 swing: $27.28 → $12.13 = 2.3× spread
- Intel-deal-collapse to standalone-recovery: $47.07 → $21.91 → $54.27 = 2.5× round-trip across 2022-2024
- 2025-2026 AI-photonics premium emergence: $34.73 → $228.73 = 6.6× spread (currently active)
Front-month options-implied vol: see ./options_chain.
6. Volume and float liquidity
| Metric | Value |
|---|---|
| 20-day avg volume | ~1.5M shares ◐ |
| 20-day avg dollar volume | ~$285M/day |
| Float | ~110M (per STOCK_PRICE_DATA.json) ◐ |
| Float turnover (20-day avg vol / float) | ~1.4% |
| Days-to-trade-float | ~73 trading days |
| Insider % | ~0.5% (very low — see ./institutional_holders) |
| Institutional % | ~65% |
Float liquidity is good for a $21B mid-cap. Unlike GFS (~83M float, 81% Mubadala-controlled) or POET (microcap), TSEM has dispersed institutional ownership — no single 25%+ controlling shareholder appears in EDGAR 13G filings since the mid-2010s ✓. Major Israeli insurance / pension institutions (Menora Mivtachim 6.17%, Migdal 6.5%, Phoenix 5.77%, Harel 7.8%, Clal 4.8%) collectively hold ~30% — but as passive long-only holders, not a controlling block.
7. Sector / peer relative-performance context
TSEM 2026 YTD performance ($117.42 → $191.54 = +63%) outpaces specialty-foundry peers materially. Approximate 2026 YTD ⚠ comparisons:
| Peer | 2026 YTD ⚠ | Comment |
|---|---|---|
| TSMC | +5-10% | Mega-cap leading-edge |
| UMC | +15% | Liquid Taiwan mature-node |
| SMIC | +25% | China-localization premium |
| GlobalFoundries (GFS) | +70% | Photonics-narrative + buyback initiation |
| Tower Semiconductor (TSEM) | +63% | AI-photonics premium + LWLG agreement |
| Vanguard International Semi (VIS) | ~+30% | Mature-node Taiwan |
The TSEM and GFS YTD outperformance vs. TSMC reflects the AI-photonics-foundry narrative leverage: both names are positioned as “the SiPh foundry layer” of the AI-datacenter optics build, while TSMC’s mature-node SiPh exposure is structurally smaller as a percentage of revenue.
8. Forward catalysts
| Date / window | Catalyst | Likely market impact |
|---|---|---|
| May 2026 | Q1 2026 6-K release | First post-LWLG-agreement quarterly print; PH18 commentary expected |
| Mar 2026 (already passed) | OFC 2026 (San Francisco, 2026-03-29 to 04-02) — Tower-Coherent demo anticipation | Already priced in; verified follow-through |
| H2 2026 | First PH18 + LWLG joint-process tape-outs (analyst projection) | Major catalyst if customer-named |
| H2 2026 | Q3 2026 6-K + ECOC 2026 conference | SiPh-revenue trajectory update |
| 2026 (post 2026-03-18) | First post-HFIAA Form 4 filings | Insider-baseline disclosures begin (see ./insider_transactions_log) |
| April 2027 | FY 2026 20-F | First full-year of HFIAA-era disclosure; first Form 3 baselines available |
9. Open items / backfill queue
- The “$33.27 trough” claim in the agent brief does not match any verified closing bar. Either re-source or correct to $21.91 (2023-10-16 closing trough) or $21.43 (2023 intraday low per year-end stats).
- Specific catalyst-to-price-spike attribution — the 2026-03-19 +17% on 7.94M shares is the modern-era’s largest single-day move; primary-source the specific catalyst (likely OFC demo announcement or named-customer disclosure) from the same-day 6-K + press flow.
- Volatility regime calibration — primary-source 30-day realized volatility from daily-bar history (vs. aggregator beta).
- TASE delisting verification — Tower historically dual-listed on Tel Aviv Stock Exchange; the agent brief notes “no longer dual-listed on TASE per recent EDGAR submissions feed.” The submissions feed reports
exchanges: ['Nasdaq']only — single-exchange, NASDAQ-only ✓. Track when delisting was effective via 6-K filings. - 2026 single-day catalyst journal — for the >10% closing days in 2026 (Feb 4, Mar 2, Mar 16, Mar 19, Mar 31), trace to specific 6-K + press attribution. Multiple events compound on March 19.
Sources
companies/tsem/data/STOCK_PRICE_DATA.json— current spot, 52w range, market cap, beta, float, institutional %. Auto-refreshed.companies/tsem/data/price_history.json— 2,514 daily bars 2016-04-29 to 2026-04-29. Auto-refreshed.- TSEM FY 2024 Form 20-F — accession 0001178913-25-001537, filed 2025-04-30 — share-count anchor + ordinary-share base. ✓ SEC EDGAR — TSEM 20-F filings.
- TSEM EDGAR submissions feed —
https://data.sec.gov/submissions/CIK0000928876.json— 1,001 filings tracked; 18 historical 20-Fs from FY 2007 forward; 748 6-Ks; 0 Form 4s (pre-HFIAA regime). ✓ verified 2026-04-29. - Intel Corp 8-K filings — CIK 0000050863 — Intel-side primary disclosures of 2022 announcement + 2023 termination. ✓ Intel EDGAR 8-K index.
- Intel announcement press release — ✓ Intel to Acquire Tower Semiconductor.
- Reuters — Intel scraps Tower deal (2023-08-16) — ◐ Reuters mirror.
- Tower CPO foundry technology press (2025-11-12) — ✓ GlobeNewswire.
- LWLG-Tower PH18 development agreement (2026-03-11) — ✓ Lightwave Logic press releases.
Cross-references
- Short interest history — short positioning at each price phase
- Institutional holders — ownership concentration
- Options chain — implied volatility regime
- Off-exchange / dark pool — flow signature
- Intel deal collapse memo — phase 2 post-mortem
- Timeline — corporate-event chronology
- PH18 process — 2026-03 LWLG-agreement product context
- Tower-ST Agrate program — phase 3 product driver
- Bull case — AI-photonics-premium thesis
- Bear case — cycle / valuation risks