Share price for the 40 %: market-based ranges, deck slide 13

User, 20 Oct 2026: add a page about possible share prices, do some
calculation on normal market data.

- docs/finance/share-price.md (new): market data with sources and
  dates (Damodaran January 2026 EV/EBITDA, P/E and betas for emerging
  markets and global; Thailand ERP 6.18 % (July 2026); ThaiBMA 10-year
  2.30 % (19 Oct 2026); illiquidity discount 20 to 35 %; venture target
  returns by stage; SET peers SCGP, TPAC, SITHAI, GRAMMY; Thai Civil and
  Commercial Code on par value and premiums).
- Results, all estimates: A founding round at par, pari passu: 542,500
  shares of 100 THB at Plan B's 54.25M equity floor, the 40 % ~21.7M
  THB; B a premium only for documented pre-round costs (102 to 137 THB);
  C value per share once running at ~163M THB debt: adverse ~0, central
  126 to 1,016 THB, favourable 508 to 2,512 THB; D a financial investor
  today 18 to 236 THB (central); E calculator cross-check. Recommendation:
  par for the founding round; pre-emption and information rights for the
  40 %.
- Deck: new slide 13 "Share price: what the 40 % could cost" in both
  themes, with notes; the ask slide points to it; 17 slides, both PDFs
  rebuilt; site slide notes trimmed.
- README bullet, layout line and Project Status link; total-investment
  shareholding paragraph links the page.

README.md

@@ -86,6 +86,7 @@ steps are open planning items.
   Plan B** (19 October 2026); the investor deck leads with it. The main
   investor holds **at least 60 % of the company**, so at most 40 % is for
   sale to co-investors (Ploy Printing, the founders, others;
+  [possible share prices](docs/finance/share-price.md);
   [shareholding](docs/finance/total-investment.md#two-plans-a-at-180m-thb-and-b-at-215m-thb-october-2026),
   20 October 2026).
   Chinese boilers, compressor and hydraulics save about 2M THB of that
@@ -325,7 +326,15 @@ The detail lives in dedicated documents:
   same output, payback ~3.8 years on ~217M THB: its extra pays back
   through what the table leaves out), the five-press table, and the levers and
   caveats behind the numbers
-- [Investor deck](docs/pitch/index.html) (October 2026): the plant in 16
+- [Share price](docs/finance/share-price.md): possible prices for the 40 %
+  of the company open to co-investors (the lead investor holds at least
+  60 %), from market data (Damodaran industry multiples, the Thai risk
+  premium and bond yield, illiquidity discounts, venture target returns,
+  Thai listed peers): the founding round at par (~21.7M THB for 40 % at
+  Plan B's equity floor), a premium only for documented pre-round costs,
+  and what a share could be worth once the plant runs, with the adverse
+  case at zero
+- [Investor deck](docs/pitch/index.html) (October 2026): the plant in 17
   web slides for BOI, bank and institutional readers, proposing Plan B
   (~215M THB) with Plan A as the comparison, in a light and a dark theme
   (press T), with a presenter view (press P) and a PDF of each theme
@@ -381,7 +390,7 @@ docs/
 │   │                         bill of materials)
 │   └── pressing-line.md   Press fleet strategy and equipment plan
 ├── finance/               Project cost overviews, revenue model,
-│                          construction RFQ, PEA electricity tariff
+│                          share price, construction RFQ, PEA electricity tariff
 │                          schedule (pea/), biomass fuel market
 │                          reports (biomass/)
 ├── suppliers/             Supplier contacts, vendor landscape, supplier map,