First Solar, Inc.

The full register, from 13F filings

The Register tab above is hand research: a dozen holders, each traced to the filing it came from. This asks the same question of the whole market for the quarter ended 31-mar-2026, where 955 managers reported a position. Broad where the research is deep, and shallow in the ways a 13F always is.

Built from 13F filings, which report US listed, long, US custodied positions only. A register from this source is a floor rather than a level: a holder's true position can be far larger, as BlackRock's ASML stake shows at 1.28m shares in a 13F against 26.3m in its 13G/A. Holdings held through derivatives, outside US custody, or below a manager's reporting obligation do not appear. Where a holder is marked as a family, its total sums several separate filing entities and describes something no single filing describes; the constituent entities and their share counts are listed so the total can be checked. That roll-up can legitimately exceed the family's own Schedule 13G, because a 13G is filed by one legal entity: Vanguard reports Alphabet through ten advisory entities, and The Vanguard Group Inc itself reported zero after its January 2026 disaggregation.

What a reader needs to know to read these numbers

• Holdings side: only one position found, a small equity-method stake in two India project subsidiaries of Cleantech Solar, dollar-sized at $6.9 million (10-Q) with no ownership percentage disclosed. Evolar AB, acquired for cash in May 2023 (10-K FY2025, Note 3 Business Acquisitions), is a wholly owned subsidiary, not a holding, and is excluded per the brief. No entity or program called 'First Solar Ventures' appears anywhere in the FY2025 10-K, the Q2 2026 10-Q, Exhibit 21, or the 2026 DEF 14A. Searched terms across the 10-K and 10-Q: 'equity method', 'non-marketable', 'unconsolidated', 'joint venture', 'equity investments', 'ownership interest', '% interest', 'Other assets', 'First Solar Ventures', 'strategic investment'. Restricted marketable securities and time-deposit/marketable-securities portfolios (disclosed in both filings under 'unrealized gain') are treasury holdings and are excluded per the brief.
• Exhibit 21 (ex211listofsubsidiaries2025.htm) was checked for an ownership-percentage column, per the technique noted for other companies (Quest Diagnostics, PPG). First Solar's Exhibit 21 is a plain two-column name/jurisdiction list of wholly owned operating subsidiaries with no percentage column and no equity-method joint ventures listed, so it is a genuine negative rather than a place we looked in the wrong way.
• Walton family: the founding Walton-family connection to First Solar is historical, not current. Michael J. Ahearn, First Solar's long-serving former Chairman/CEO and current board member, was 'partner and president of JWMA (formerly True North Partners, LLC)', an equity investment firm through which the Walton family originally backed the company pre-IPO. The 2026-04-02 DEF 14A's full text returns zero hits for 'Walton', and its 5%-holder table lists only Vanguard (12.8%), BlackRock (10.4%), SIG/Susquehanna (7.9%), FMR (6.1%) and Citadel (5.3%); no Walton-named person or entity appears. This reads as a fully exited historical position: recorded here as a note with no row, per the brief's rule for an exited stake.
• SIG (Susquehanna) and Citadel: the DEF 14A's 5%-table cites Schedule 13G beneficial ownership of 8,466,499 shares (7.9%) for the Susquehanna/SIG/Capital Ventures group and 5,681,838 shares (5.3%) for the Citadel group, both aged 13G figures from mid-2025. Per the rule to prefer a fresh 13F over a stale 13G, their own Q2 2026 13F-HR filings were checked directly: SIG Brokerage LP (CIK 0001094429) reports only 1,420 non-derivative common shares of FSLR (plus large call/put option lines excluded from the share count); Susquehanna Advisors Group (1444949) and Susquehanna Capital Management (1879628) report zero FSLR common shares; Citadel Advisors LLC (CIK 0001423053) reports 89,345 non-derivative common shares (plus much larger option/derivative lines excluded). The large 13G totals are overwhelmingly options-market-making derivative exposure, not a real economic equity stake, so both were excluded from the register as share-count rows to avoid the mixed-instrument trap; the 13G figures are recorded here for context only and were not charted.
• Register data-source discipline: the entity NAMES for the Vanguard, Capital Group and T. Rowe Price sweeps were sourced from this project's own data/registers/FSLR.json snapshot (period 31-MAR-2026), used only to enumerate who to check. Every share and dollar figure actually used in this file was re-fetched from each entity's own fresh Q2 2026 (period 2026-06-30) 13F-HR information table, never taken from that snapshot.
• Self-gate, computed on the final file exactly as the chart computes it: no row is_aggregate or rolls_up_into anything (no individual director/officer rows are carried, so the insider group row stands alone with nothing to reduce). Row count 11. Sum of shares = 14,029,065 + 13,571,161 + 5,576,026 + 3,109,602 + 4,114,639 + 2,179,215 + 1,790,509 + 1,185,601 + 709,626 + 157,649 + 423,164 = 46,846,257. Against shares_outstanding 107,469,788, that is 43.59%, inside the expected 25 to 45 percent band.
• shares_outstanding 107,469,788 is the cover-page figure from the Q2 2026 10-Q (filed 2026-07-30), 'As of July 24, 2026'. The same 10-Q's balance sheet shows 107,469,302 shares issued and outstanding at June 30, 2026, a difference of 486 shares, immaterial and not reconciled further.
• market_cap_usd ($23.64bn) and market_cap_as_of (2026-08-18) are sourced from stockanalysis.com, an aggregator, not a filing; no other field in this file uses that basis.