Fastenal Company

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 1,397 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

• SPLIT BASIS: Fastenal announced a two-for-one forward stock split on 23 April 2025, per the FY2025 10-K and the 2026 proxy ('Stock Split: On April 23, 2025, we announced a two-for-one stock split of our outstanding common stock. Holders of record at the close of business on May 5, 2025, received one additional share for every share owned. The stock split took effect at the close of business on May 21, 2025.'). The FY2025 10-K states all historical common stock share and per-share information, stock option awards, and stockholders' equity figures have been retroactively adjusted to reflect the split. The 2026 DEF 14A carries an equivalent 'Special Note Regarding Presentation' applying the same retroactive adjustment to the whole proxy document. This file is entirely on the CURRENT POST-SPLIT basis.
• Every source used post-dates the 21 May 2025 split effective date by over a year: the Q2 2026 10-Q (cover page, shares outstanding as of 10 Jul 2026), every manager's Q2 2026 13F-HR (period 30 Jun 2026, filed Aug 2026), and the 2026 proxy DEF 14A (filed 25 Feb 2026, ownership tables dated 1 Feb 2026, explicitly stating the whole document's share figures are retroactively split-adjusted, even where the underlying Schedule 13G data it cites for BlackRock and Vanguard is dated 31 Dec 2023, pre-split). Because every source either post-dates the split or was explicitly restated by the filer itself, NO manual share-count restatement arithmetic was required in the register; the only arithmetic restatement needed in this file was T. Rowe Price's value column, which is a THOUSANDS convention issue (value reported in $000s), not a split issue, see that row's method_note. This is the same distinct failure mode the brief warns about ('T. Rowe Price has done this on seven companies here') and is unrelated to the 2-for-1 split.
• Cross-check that the split basis was correctly identified: shares_outstanding (1,147,497,573) x share_price_usd ($51.23) = $58.79bn, matching stockanalysis.com's independently reported market cap for FAST as of 17 Aug 2026. A pre-split share count (roughly 574 million) would have produced a nonsensical ~$29.4bn market cap against the same price, which is not what was observed, confirming the post-split basis is correct.
• Implied-price clustering (rule 10): every register row's value_usd divided by shares lands at $48.03 to $48.14 per share (State Street, VCM, VPM, BlackRock, Schwab, Morgan Stanley, Bank of America, Norges Bank, Northern Trust, Wellington, Wells Fargo, FMR, Franklin all at $48.03; Geode at $48.14; JPMorgan slightly lower at $47.40, within normal 13F line-rounding). None sits off by ~2x (which would indicate an unrestated pre-split row) or by ~1000x (the thousands trap) except T. Rowe Price's as-filed figure, which is corrected in this file per its method_note. This confirms every row here is genuinely on the same post-split basis, not merely asserted.
• The Q1 2026 13F snapshot at data/registers/FAST.json (period 31-MAR-2026, CUSIP 311900104, total_shares_reported 945,964,897) was read only to decide which managers to look up, per the brief; it was not copied into this file. Its scale (roughly 945.9 million institutional shares against ~1.15 billion shares outstanding) is consistent with it also being on the post-split basis, since it post-dates the 21 May 2025 split by over 9 months, but this was not independently verified since the register below is sourced entirely from each manager's own Q2 2026 Form 13F-HR instead.
• The Vanguard case (rule 7): Vanguard Group Inc, CIK 0000102909, filed Form 13F-NT (notice, no holdings) for the quarter ended 30 June 2026. Its FAST position is reported instead by two successor filers, Vanguard Capital Management LLC (CIK 0002100119, 74,919,565 shares) and Vanguard Portfolio Management LLC (CIK 0002100121, 64,893,489 shares), summed into one 'The Vanguard Group' row (139,813,054 shares) per the brief's Vanguard rule. This is the same successor-reporting pattern documented for other companies in this project (e.g. oreilly-automotive.json).
• Capital Group check: none of the three Capital Group 13F-HR filers named in the brief (Capital World Investors CIK 0001422849, Capital International Investors CIK 0001562230, Capital Research Global Investors CIK 0001422848) holds a Fastenal position in their Q2 2026 13F-HR information tables. Each was checked independently by both name fragment ('FASTENAL', 'FASTEN') and by CUSIP (311900104); all three returned zero matching rows. This is explicitly NOT the Vanguard successor case since none of the three files a 13F-NT deferring to another; they simply do not hold FAST. No 'Capital Group' row is included in the register.
• MFS (Massachusetts Financial Services Co, CIK 0000912938) and Dodge & Cox (CIK 0000200217) were also checked by name fragment and by CUSIP 311900104 in their Q2 2026 13F-HR information tables; neither holds a Fastenal position. Both are omitted from the register for the same reason.
• Register reconciliation, BlackRock and Vanguard vs. the proxy's 13G-derived table. The 2026 proxy's 'Security Ownership of Certain Beneficial Owners' table (as of 1 Feb 2026) reports BlackRock, Inc. at 92,133,022 shares (8.02%) and The Vanguard Group at 140,673,160 shares (12.25%), both sourced from Schedule 13G/A amendments reflecting ownership as of 31 December 2023 and both stated by the proxy's own presentation note to be retroactively split-adjusted. This register instead uses each manager's own Q2 2026 Form 13F-HR (30 Jun 2026 position date), which is fresher: BlackRock at 106,297,179 shares (9.26%) and Vanguard's successor entities summing to 139,813,054 shares (12.18%). The Vanguard figures are close (down about 0.86 million shares versus the older 13G snapshot); BlackRock is up about 14.16 million shares over the roughly 2.5-year gap between the two data points. Both differences are consistent with normal position changes over that period, not a basis error, and are corroborated by the implied-price clustering check above.
• No Schedule 13D or 13G has been filed against Fastenal common stock since 13 February 2024 (BlackRock's 13G/A) and 25 January 2024 (Vanguard's 13G/A), per the EDGAR SC 13 filing feed for CIK 0000815556, so there is no fresher independent 5 percent-owner filing than the 13F-HR data used above, and no separate founder or family 13D/G exists.
• Holdings search. The Q2 2026 10-Q and FY2025 10-K were both searched for 'equity method', 'unconsolidated', 'joint venture', 'equity investment', 'investment in', 'affiliate', 'noncontrolling' and 'non-marketable'. The Q2 2026 10-Q returned zero hits on all of these terms. The FY2025 10-K returned zero hits on 'equity method', 'unconsolidated', 'joint venture', 'equity investment' and 'non-marketable'; the four hits for 'affiliate' concern non-affiliate market-value disclosure boilerplate, the definition of 'affiliates' for that purpose, IP licensing boilerplate, and a note-purchase agreement counterparty, none of which is an equity stake in another company; the five hits for 'investment in' all concern capital-expenditure and working-capital investment in Fastenal's own operations (hardware, software, inventory, property and equipment), not investments in other entities. This is consistent with the brief's expectation that an industrial fastener distributor typically holds no equity-method or joint-venture positions in other companies. The empty holdings array below is a sourced finding, not an omission.
• Self-gate check: 15 institutional register rows (Vanguard combined through T. Rowe Price), the Daniel L. Florness individual insider row (counted at full value, not a container), and the residual 2,079,236 shares of the 'Directors and executive officers as a group' row (3,265,322 minus the 1,186,086 that rolls up from Florness, per the self-gate formula) sum to 501,303,074 shares against 1,147,497,573 shares outstanding, or 43.69%. This falls within the expected 25 to 45 percent range and is well inside the 15/55 percent split-mismatch alarm bounds, corroborating that every figure in this file is correctly on the post-split basis. Row count: 17.