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TSEM
~11 min read · 2,436 words ·updated 2026-04-29 · confidence 65%

Primary filings index — Tower Semiconductor Ltd. (CIK 0000928876)

This file is the chronological index of TSEM SEC filings to cite from. Tower Semiconductor Ltd. is an Israel-incorporated, US-listed (NASDAQ) Foreign Private Issuer (FPI), which means the FPI disclosure regime applies:

  • Form 20-F annual report (typically filed Apr-May following fiscal-year-end Dec 31)
  • Form 6-K interim report (filed for any material event, financial release, principal-shareholder disclosure, or any document furnished to non-US shareholders / regulators); TSEM has filed ~750 6-Ks since 2008 — extremely high cadence reflecting Israeli-securities-law disclosure requirements
  • Schedule 13D / 13G beneficial-ownership filings (Israeli pension funds + US hedge funds + other 5%+ holders)
  • Form 144 notice of proposed sale (used by control-persons for restricted-stock sales; applies pre-HFIAA)
  • F-1 / F-3 registration statements
  • 424B5 / 424B7 prospectus supplements (used for shelf take-downs + secondary offerings)
  • Form 4 insider-transaction reports — NOT applicable pre-2026-03-18 (FPI carve-out from Section 16(a)); applies from 2026-03-18 forward under HFIAA. Currently zero Form 4 filings on record.

Compare to GFS (US-domestic-issuer Cayman-incorporated, full Section 16 + 10-K + 10-Q regime) and POET (FPI like TSEM, post-HFIAA same-regime). The 6-K cadence is comparable to POET; TSEM’s 6-K archive is one of the densest in the FPI universe.

EDGAR base URL: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000928876 EDGAR submissions feed (canonical): https://data.sec.gov/submissions/CIK0000928876.json — 1,001 filings tracked as of 2026-04-29 ✓.

1. Annual reports (Form 20-F)

Fiscal yearFiling dateAccession #Primary docNotes
FY 2024 (period Dec 31 2024)2025-04-300001178913-25-001537zk2533083.htmLatest 20-F filed. Should disclose: FY 2024 segment revenue mix, Tower-ST Agrate revenue contribution (first commercial-production year), Maxim Newport Beach 8” line acquisition footnote, Item 6 Senior Management + Compensation, Item 7 Major Shareholders (the authoritative anchor for the holder-set discussion in institutional_holders). ✓ accession verified.
FY 20232024-04-220001178913-24-001397zk2431315.htmReflects post-Intel-deal-collapse standalone-strategic narrative re-emergence; Intel reverse-termination $353M fee accounting; Tower-ST Agrate program disclosure.
FY 20222023-05-160001178913-23-001918zk2329568.htmIntel-deal-pendency-year filing. Risk factors heavily Intel-merger-conditional. Filed 4 months before deal-collapse.
FY 20212022-04-290001178913-22-001694zk2227671.htmFiled ~10 weeks after the 2022-02-15 Intel announcement; reflects pre-deal capital structure + new merger-related risk factors.
FY 20202021-04-300001178913-21-001533tsem20f1220.htmCOVID-impact year; specialty-foundry capacity tightening pre-cycle.
FY 20192020-04-300001178913-20-001277tsem20f2019.htmPre-COVID baseline; TPSCo ownership flip context.
FY 20182019-04-250001178913-19-001206zk1922940.htm2018 cyclical de-rate year; Q4 2018 collapse $36 → $14.
FY 20172018-04-300001178913-18-001356zk1821515.htmTPSCo Sandisk Yokneam transaction year.
FY 20162017-04-100001178913-17-001103zk1719799.htm
FY 20152016-05-110001178913-16-005389zk1618437.htm
FY 20142015-05-140001178913-15-001676zk1516675.htmTPSCo formation year (2014-03-31).
FY 20132014-05-140001178913-14-001662zk1414867.htm
FY 20122013-04-300001178913-13-001288zk1313025.htm
FY 20112012-04-300001178913-12-001224zk1211364.htm
FY 20102011-05-170001178913-11-001431zk1109871.htm
FY 20092010-04-300001178913-10-001138zk1008214.htm
FY 20082009-06-300001178913-09-001535zk96862.htmTowerJazz brand era; first full year post-Jazz acquisition.
FY 20072008-06-180001178913-08-001507zk85345.htmPre-Jazz-acquisition baseline; oldest 20-F in EDGAR.

18 historical 20-Fs catalogued. The FY 2007 filing (acc. 0001178913-08-001507) is the oldest in EDGAR and reflects the standalone Tower (pre-TowerJazz-rebrand) operating profile.

2. Interim reports (Form 6-K) — recent + key historical

Tower’s 6-K cadence is extremely high (~80-100 filings per year) reflecting Israeli-securities-law and TASE disclosure requirements. Each general-meeting notice, dividend declaration, capital-restructuring action, or material business announcement generates a 6-K. Below: most-recent 12 6-Ks + historically significant filings.

2.1 Most recent 6-K stream (2026 YTD)

Accession #DateDocumentLikely content
0001178913-26-0022202026-04-27zk2635136.htmMost recent 6-K as of KB cutoff
0001178913-26-0021632026-04-20zk2635106.htmMid-April
0001178913-26-0016952026-03-25zk2634949.htmPost-LWLG-agreement window
0001178913-26-0016932026-03-25zk2634948.htmSame-day companion 6-K
0001178913-26-0015792026-03-23zk2634893.htmOFC week aftermath
0001178913-26-0009412026-03-17zk2634756.htmLikely Tower-side LWLG / OFC press 6-K ⚠ verify
0001178913-26-0008842026-03-16zk2634680.htmLikely PH18-related 6-K
0001178913-26-0007082026-03-04zk2634492.htm
0001178913-26-0006712026-03-02zk2634415.htm
0001178913-26-0006192026-02-25zk2634442.htm
0001178913-26-0005652026-02-19zk2634409.htm
0001178913-26-0004792026-02-17zk2634383.htm
0001178913-26-0004042026-02-11zk2634339.htmLikely Q4 2025 + FY 2025 results 6-K ⚠ verify

2.2 Key historical 6-Ks (Intel-deal-cycle + AI-photonics-ignition)

PeriodApproximate filing windowLikely content
2022-02-156-K windowIntel acquisition announcement Tower-side disclosure
2022-06-216-K windowTower shareholders approve merger at EGM
2023-08-166-K windowIntel-Tower deal termination Tower-side disclosure + $353M reverse-termination-fee receipt
2025-11-10Q3 2025 results 6-KQ3 2025 financial release + AI-photonics commentary
2025-11-126-KCPO foundry technology platform announcement ✓ (GlobeNewswire)
2025-11-17 (acc. 0001178913-25-003870)6-KMid-November filing
2026-02-11 (acc. 0001178913-26-000404)6-KQ4 2025 + FY 2025 results ⚠ verify
2026-03-11 to 2026-03-176-K windowTower-LWLG PH18 development agreement disclosure

2.3 6-K aggregate count

Total 6-K filings on TSEM EDGAR submissions feed: 748 as of 2026-04-29 ✓. Date range: from the earliest TSEM 6-K (~2008-2009) through 2026-04-27.

Methodological note. Building a complete 6-K-by-6-K index for TSEM is impractical at the page-budget level; the 6-K archive is too dense. The recommended approach: (a) systematically catalogue 6-Ks by category — annual general meeting (AGM), Q-end results, capital-structure events, principal-shareholder disclosures — using EDGAR full-text search; (b) maintain a chronological link list for the most recent 12-24 months with content-type tagging; (c) use full-text search to retrieve specific historical 6-Ks for KB claim-validation needs. The KB does not currently maintain a 6-K-content-type index — open backfill task.

3. Schedule 13G / 13D — beneficial-ownership filings

The most analytically-load-bearing filing series for institutional_holders.

3.1 Recent SC 13G filings (post-2023; modern dispersed-ownership era)

DateFormAccession #Filer%Significance
2026-02-12SC 13G/A No. 20000902664-26-000942Senvest Management, LLC + Richard Mashaal3.60%Post-rally trim from 5.0% → 3.6% — profit-taking ✓
2026-02-10SC 13G/A No. 30001178913-26-000396Menora Mivtachim Holdings (incl. Pensions & Gemel sub)6.17% totalTop filer; Israeli-pension cohort ✓
2025-11-14SC 13G/A No. 10000902664-25-004911Senvest Management, LLC + Richard Mashaal5.00%Initial 5%+ disclosure during Q3 2025 rally ✓
2025-11-14SC 13G/A No. 30000902664-25-004998Point72 Asset Management, L.P. + Steven A. Cohen2.60%US hedge-fund position ✓
2025-11-13SC 13G0001178913-25-003820Migdal Insurance & Financial Holdings (incl. Sal Domestic Equities + Mutual Funds)~7.80% (consolidated)Top Israeli-pension filer ✓
2025-11-12SC 13G/A No. 30001178913-25-003775Clal Insurance Enterprises Holdings4.80%Israeli-insurance-pension filer ✓
2024-12-09SC 13G0001178913-24-003943Menora Mivtachim Holdings5.08% (initial)Initial 5%+ filing ✓
2024-11-14SC 13G/A No. 90001178913-24-003662Phoenix Financial Ltd5.77%Israeli-pension filer; long-running disclosure trail ✓
2024-10-15SC 13G/A No. 20001178913-24-003309Harel Insurance Investments & Financial Services7.80%Israeli-insurance-pension filer ✓
2024-02-15SC 13G/A0001178913-24-000618(filer not extracted)n/a⚠
2024-02-14SC 13G/A0001178913-24-000572(filer not extracted)n/a⚠
2024-01-31SC 13G0001178913-24-000332Migdal Insurance & Financial Holdings6.10%Annual update ✓
2024-01-30SC 13G/A0001178913-24-000291(filer not extracted)n/a⚠
2024-01-09SC 13G0000902664-24-000100(filer not extracted; Senvest precursor?)n/a⚠
2023-08-10SC 13G0001178913-23-002805Harel Insurance Investments5.30% (initial)Post-Intel-deal-collapse buying ✓
2023-02-13SC 13G/A0001178913-23-000489(filer not extracted)n/a⚠
2023-02-10SC 13G/A0000902664-23-001490(filer not extracted)n/a⚠
2023-01-26SC 13G0001178913-23-000265Migdal Insurance & Financial Holdings3.85%Sub-5% reporting ✓

Open backfill: 5-7 of the 2023-2024 SC 13G filings have not had filer-identity extracted. Direct primary-doc retrieval pending for a complete holder-base reconstruction.

3.2 Historical SC 13G / 13D (pre-2023, modern-era boundary)

DateFormAccession #Comment
2022-03-10SC 13G/A0000902219-22-000023
2022-03-08SC 13G/A0001178913-22-000984
2022-02-09SC 13G/A0000902664-22-001313
2022-02-07SC 13G/A0001178913-22-000404
2022-02-04SC 13G/A0001678858-22-000074
2022-02-02SC 13G0001178913-22-000321
2022-01-31SC 13G/A0001178913-22-000270
2022-01-18SC 13G0001178913-22-000151
2021-02-12SC 13G/A0000902664-21-001286
2021-02-11SC 13G/A0001178913-21-000454
2020-09-24SC 13G0001178913-20-002684
2015-07-29SC 13D0001193125-15-266370Kirby Enterprises Inc. — last meaningful SC 13D, pre-modern-dispersed-era ✓
2015-01-20SC 13D0001193125-15-014642
2011-03-28SC 13D0000902561-11-000023
2011-03-14SC 13D0000902561-11-000018
2008-10-09SC 13G0000891092-08-004953Earliest catalogued SC 13G

Critical absence verification: No Israel Corp / Idan Ofer / Kenon Holdings / Mubadala SC 13G or SC 13D filings appear in the 2008-2026 EDGAR archive ✓ verified directly. Israel Corp (founding-era shareholder) had exited / diluted below 5% before the modern (post-2016) observation window.

4. Form 144 — notice of proposed sale (control-persons)

DateAccession #Comment
2025-11-190001968582-25-001081Single Form 144 filing in the 12-month pre-HFIAA window. Filer identity / share count not yet extracted (open backfill).

5. Form 4 — Section 16(a) insider transactions

TSEM Form 4 count: 0 ✓ as of 2026-04-29.

The Section 16(a) FPI carve-out applied throughout TSEM’s 1994-2026-03-18 history. The HFIAA repeal of the carve-out is effective 2026-03-18 — 42 days before the KB cutoff (2026-04-29).

Expected first-Form-3 wave: May-June 2026 (within 90-day initial-filing deadline). Expected first-Form-4 transaction filings: contingent on insider-transaction activity post-2026-03-18.

See insider transactions log for the regime-shift detail.

6. Registration statements + secondary offerings

FilingDateAccession #Notes
424B52013-06-040001178913-13-001725Historical secondary offering prospectus supplement
F-3 / 424B5 / 424B7 (recent)various⚠ to be enumerated from full EDGAR pullTSEM has periodic shelf registrations; full enumeration pending

Open backfill. The 2026 TSEM full filing index includes additional F-3 and 424B5 filings not yet catalogued in this KB. Recommend a full submissions-feed enumeration of F-3, 424B5, 424B7, 424B3 form types from the EDGAR feed.

7. Interpretive notes — Foreign Private Issuer regime cadence

AspectTSEM (FPI)Comparison: GFS (US-domestic Cayman)
Annual report20-F (one per year, ~120 days post FY-end)10-K (~60 days post FY-end)
Quarterly reportsNONE (no equivalent of 10-Q)10-Q (4 per year, 40-45 days post Q-end)
Material-event report6-K (any filing furnished to non-US shareholders / regulators)8-K (filed within 4 business days of triggering event)
Insider tradesForm 4 — post-HFIAA only (2026-03-18 forward)Form 4 — applies throughout
Proxy / governanceNO DEF 14A; AGM materials filed on 6-KDEF 14A annually
6-K cadenceVery high (~80-100 / year)n/a (8-K only on triggering events)

The 6-K density is the single most important methodological feature of TSEM disclosure. Tower’s ~80 6-Ks/year is consistent with Israeli companies that maintain dual-listing readiness and produce cross-border-disclosure in both Hebrew and English. Each general-meeting notice, board-resolution, principal-shareholder change, and dividend-declaration produces a 6-K. An analyst building the catalyst-attribution timeline (stock price history) MUST cross-reference single-day-price-move dates against the 6-K stream to identify the specific triggering disclosure.

8. Filing-index verification checklist

For each KB claim citing an accession number, the following checks should hold:

  1. Accession exists in https://data.sec.gov/submissions/CIK0000928876.json. ✓ verified for all accessions in this index.
  2. Primary doc is accessible at https://www.sec.gov/Archives/edgar/data/928876/{accession_no_dashes}/{primary_doc_filename}.
  3. Filing date matches the EDGAR submissions feed.
  4. Form type matches the EDGAR submissions feed.

9. Open items / backfill queue

  1. Full extraction of FY 2024 20-F (acc. 0001178913-25-001537) — Item 6 (Senior Management + Compensation), Item 7 (Major Shareholders), Item 18 (Financial Statements), and risk factors. This is the single highest-priority backfill item for the KB.
  2. 6-K content-type index — categorise 748 6-Ks by content type (results, AGM, principal-shareholder, capital-structure, material-business-announcement). Even a sample-based effort (e.g., 50 most-recent + 20 historically significant) would unlock substantial catalyst-attribution power.
  3. Form 144 acc. 0001968582-25-001081 primary-doc XML extraction — filer identity, share count, intended sale date.
  4. 5-7 2023-2024 SC 13G filings — extract filer identity and percentage holding for the entries flagged ⚠.
  5. F-3 / 424B5 / 424B7 enumeration — pull all registration-statement filings from EDGAR submissions feed and catalogue.
  6. Israel Corp / Ofer historical exit pin-down — cross-reference the early-2010s 20-Fs (FY 2010-2014) Item 7 + Israeli SAR / Maya filings.
  7. Post-HFIAA Form 3 / Form 4 wave detection — automated alerts on first Form 3 + Form 4 filings.

Cross-references