GFS Forward Catalyst Calendar

This file enumerates the discrete forward events that will materially update the GFS thesis between 2026-04-29 and the end-2028 horizon. Each catalyst is mapped to (a) its date or expected window, (b) its primary thesis significance (which bull / bear pillar or risk it tests), and (c) the disclosure path that would surface the result. Used together with the risks register, this catalyst calendar is the analytical scaffolding for monitoring the position thesis quarter-by-quarter.

GFS is a US-domestic-issuer Section-12 filer (10-K + 10-Q + 8-K + DEF 14A + Form 4), giving the catalyst calendar a richer disclosure cadence than POET (foreign private issuer with 20-F + 6-K only). Every quarter produces a 10-Q with full segment-level revenue + margin disclosure; every Form 4 filing produces real-time insider-transaction visibility; every 8-K lets the company push material events to the market without delay.

Near-term (next 6 weeks: May 2026 - June 2026)

Date / window	Event	Thesis significance	Disclosure path
May 5 2026, 8:30 AM ET	Q1 2026 earnings release + conference call (Stocktitan ✓)	First post-AMF-deal-close quarterly print. Tests bull case Pillars 1, 3, 7 (SiPh trajectory, Communications Infrastructure & Datacenter segment growth, design-win cohort conversion) + bear case Pillars 2, 3, 7 (mature-node ASP, AI-digestion timing). First quarter to include AMF ~6 weeks of post-close revenue (deal closed Nov 17 2025 = full Q1 2026 contribution).	SEC EDGAR 10-Q + 8-K + GF press release; live call + transcript via Motley Fool, Investing.com, Yahoo Finance.
May 7 2026	2026 Investor Day (New York)	Critical milestone: management deep-dive on (a) AMF integration progress + Singapore 300mm upgrade timeline, (b) $1B SiPh run-rate end-2028 trajectory + customer pipeline visibility, (c) capex-cycle envelope + FCF trajectory, (d) Mubadala-relationship update. Tests entire bull / bear thesis simultaneously — re-rating event probability is highest here.	Investor Day deck + live presentation + press release; expect significant analyst-day activity through CY 2026.
June 2026 (typical AGM window)	GF Annual General Meeting (AGM) 2026	DEF 14A proxy materials + shareholder vote on board re-election + executive compensation. First full AGM with Tim Breen as CEO and Caulfield as Executive Chairman. Mubadala director-nomination structure vote.	DEF 14A proxy filed ~April-May 2026; live AGM presentation + Q&A.

Mid-term (6 weeks - 6 months: July 2026 - October 2026)

Date / window	Event	Thesis significance	Disclosure path
August 2026 (target)	Q2 2026 10-Q + earnings release	Half-year tracking against the “nearly double SiPh in 2026” management commitment. First full quarter (Q2 2026) with AMF integration cost reflected in segment margins.	SEC EDGAR 10-Q + 8-K + earnings call; FactSet / Bloomberg analyst-estimate revisions cycle.
September 2026	OFC 2026 industry-conference replacement window (OFC March 2026 already passed) — alternative catalyst is ECOC 2026 (Brussels, Sept 21-25 2026)	European Conference on Optical Communication. GF historical disclosure venue for Fotonix process updates + customer co-presentations. ECOC 2026 disclosures will reveal whether merchant-pluggable layer is holding share vs CPO encroachment. Tests risks X1 (CPO architectural shift) + bull case Pillar 4.	GF technical presentations at ECOC; conference proceedings; partner co-presentations (Marvell, Broadcom, Lightmatter, Ayar Labs).
September 2026	CIOE 2026 (Shenzhen, target Sept 2026)	China Optoelectronics Exposition. Although GF doesn’t directly disclose to CIOE customers, Fotonix-based modules from Innolight / Hisense Broadband / Source Photonics frequently feature; signals China-market addressable-pipeline status (Pillar 6 bear).	CIOE program; module-OEM partner press releases that name Fotonix/GF SiPh as the integration partner.
October-November 2026 (target)	Q3 2026 10-Q + earnings release	Three-quarter view of FY 2026 trajectory. Critical visibility on whether $1B end-2028 run-rate is tracking. AMF integration costs should normalize by Q3.	SEC EDGAR 10-Q + 8-K + earnings call.
September-November 2026	Possible next Mubadala selldown event (analyst estimate, ⚠ inferred)	Pattern: ~12-18 months between selldown events. Last event March 2026. Possible window: late-2026 or early-2027. -3% to -7% one-day technical pressure historical pattern; tests bear case Pillar 1.	Globe Newswire / SEC 13D/G amendments; underwriter-launch announcements; pricing 8-Ks.

Long-term (6 months - 18 months: November 2026 - October 2027)

Date / window	Event	Thesis significance	Disclosure path
February 2027 (target)	Q4 2026 / FY26 10-K filing + earnings call	Full-year 2026 financial results. Tests bull case Pillar 3 ($1B SiPh trajectory midpoint). FY 2026 full SiPh segment revenue should print at ~$400M if “nearly double” guidance holds. Risk-factor diff (per `risk_factor_diff.json` tracking) reveals new disclosure language.	SEC EDGAR 10-K + 8-K + DEF 14A (proxy season).
March 2027	OFC 2027 (San Diego, March 2027)	Optical Fiber Communication conference — premier industry venue. Hyperscaler module-spec disclosures, 3.2T architecture disclosures, CPO-vs-pluggable architectural inflection visibility. Tests risks X1, X2, X3. GF historical OFC presence + Fotonix process-update keynotes.	OFC technical program + GF press releases + customer co-presentations.
April-May 2027 (target)	Q1 2027 10-Q + earnings release	First post-FY26 quarterly print. Tests whether 2H 2026 SiPh momentum carried into 2027 — bull-case Pillar 3 verification. AMF Singapore 300mm upgrade milestone disclosure expected here or at Investor Day.	SEC EDGAR 10-Q + 8-K.
May 2027 (target)	2027 Investor Day (likely New York; analyst estimate ⚠ inferred)	Annual cadence event. Updated capex envelope + SiPh run-rate trajectory + multi-segment growth-driver mix. Critical for any photonics-narrative re-rating window.	Investor Day deck + GF press release.
June 2027	AGM 2027 + DEF 14A proxy	Annual proxy cycle. Mubadala-related director re-election + executive-comp ratification.	DEF 14A + AGM materials.
August 2027 (target)	Q2 2027 10-Q + earnings release	Mid-year FY27 print. First full year of post-AMF integration — segment margins should reflect the integrated cost structure.	SEC EDGAR 10-Q + 8-K.
September 2027	ECOC 2027 (target Sept 2027)	Third consecutive ECOC GF disclosure window. Tests architectural-positioning competitive narrative two years out vs Tower / Intel / TSMC.	GF technical presentations + customer co-presentations.
November 2027 (target)	Q3 2027 10-Q + earnings release	Three-quarter view of FY 2027. SiPh run-rate at ~$650-750M tracking visibility for end-2028 $1B target.	SEC EDGAR 10-Q + 8-K.
2027 (full year)	Customer first-silicon announcements from key partners	LWLG commercial PDK live since Mar 2026 — first-product PR window 12-18 months later, i.e., Mar 2027 - Sep 2027. NLM Photonics first-silicon similar window. Marvell post-Polariton POH integration timing dependent on Marvell’s roadmap. Each customer press release naming Fotonix as the foundry confirms the bull-case Pillar 1 customer-roster narrative.	LWLG / NLM / Marvell / Ayar Labs / Lightmatter / PsiQuantum / Ranovus IR press releases; Form 8-K from publicly-listed customers.

Long-term (18+ months: November 2027 - end-2028)

Date / window	Event	Thesis significance	Disclosure path
February 2028 (target)	Q4 2027 / FY27 10-K filing + earnings call	Full-year 2027 financial results. Critical $1B-by-end-2028 trajectory verification: SiPh segment should be tracking $700M+ annual run-rate by end-FY27.	SEC EDGAR 10-K + 8-K.
March 2028 (target)	OFC 2028 + Investor Day 2028	Critical inflection window: 3.2T product cycle should be in volume. Hyperscaler CPO transition visibility. Customer-pipeline-conversion update.	OFC + Investor Day deck + GF press releases.
End-2028 (Q4 2028)	$1B SiPh run-rate target deadline	The single highest-impact thesis-defining moment. If the SiPh segment exits Q4 2028 at $250M+ quarterly run-rate (= $1B annualized), bull-case Pillar 3 is confirmed and the equity supports a multiple-expansion narrative. If it tracks at $700-900M annualized, bull case is partially delivered but multiple-expansion math is reduced. If it tracks <$700M, bear-case multiple-compression dominates.	Q4 2028 10-K + earnings call.
2028 (full year)	Mubadala stake — possible inflection below 60%	At ~12-18 month per-event cadence, the post-2026 selldown pattern would put Mubadala at ~50-65% by end-2028. A break below 50% (non-controlling) would be a structural re-rating event for the GFS float-expansion thesis.	SC 13G/A amendments + secondary-offering 8-Ks.
2028 (full year)	CHIPS Act milestone disclosures + clawback risk window	The 2024-awarded CHIPS Act $1.5B subsidy includes capex-deployment-milestone covenants. Material public progress reports expected on milestones; clawback risk emerges if Malta + Vermont + Dresden capex slips materially.	NIST + Department of Commerce annual reports; GF capex disclosures in 10-K.

Risk-mapping summary table

Cross-references each catalyst window to the most-tested risk IDs in risks:

Catalyst window	Tests bull pillars	Tests bear pillars	Tests risk IDs
Q1 2026 earnings (May 5 2026)	Pillar 3, Pillar 7	Pillar 2, Pillar 3, Pillar 7	C1, T1, X1, M1
Investor Day (May 7 2026)	All 8	All 8	All categories
AGM 2026 (June 2026)	Pillar 5	Pillar 1	K2, K4, X5
Q2 2026 earnings (Aug 2026)	Pillar 3, Pillar 6	Pillar 3, Pillar 4	T1, M1, M2
ECOC 2026 (Sept 2026)	Pillar 1, Pillar 4	Pillar 5	T2, X1, X2
Q3 2026 earnings (Nov 2026)	Pillar 3	Pillar 4, Pillar 7	M1, M2, K1
Possible Mubadala selldown (late 2026)	Pillar 5	Pillar 1	K2, K4
FY26 10-K (Feb 2027)	Pillar 3, Pillar 7	All bear pillars	All categories
OFC 2027 (Mar 2027)	Pillar 1, Pillar 4	Pillar 2, Pillar 5	T1, T3, X1, X2, X3
Customer first-silicon PRs (2027)	Pillar 1	Pillar 2	C1, X1, X3
FY27 10-K (Feb 2028)	Pillar 3	Pillar 3, Pillar 4, Pillar 7	M1, M2, K1
End-2028 $1B target	Pillar 3, Pillar 4	Pillar 2, Pillar 5, Pillar 7	All photonics-segment risks
2028 Mubadala <60% inflection	(capital structure positive)	Pillar 1	K2, K4

Aggregate-thesis re-rating windows

The catalyst calendar identifies four discrete windows when the GFS thesis can mechanically re-rate to the bull / base / bear case end-points described in bull case and bear case:

May 5-7 2026 (Q1 earnings + Investor Day): the highest-density catalyst window of the next 24 months. Management has the opportunity to (a) reaffirm or upgrade the $1B SiPh target, (b) provide AMF integration milestone visibility, (c) update capex envelope, (d) update Mubadala-relationship posture. Any one of these positively-skewing materially changes the equity multiple. Conversely, a target-reset or capex-overrun on these days creates immediate -10% downside risk.
Q4 2026 / FY26 10-K (February 2027): full-year delivery on the “nearly double SiPh in 2026” commitment. SiPh segment FY 2026 actual revenue + customer-pipeline qualitative disclosures = the single largest data-density window after Investor Day.
Q3-Q4 2027 / FY27 10-K (Q3 earnings November 2027 + 10-K February 2028): midpoint of the $1B-by-end-2028 trajectory. Year-2 of “double-double-and-some” SiPh growth should have FY 2027 SiPh revenue at $650-750M annualized. Anything materially below that is a Pillar 3 bull-case break.
End-2028 Q4 print + FY28 10-K (February 2029): the structural target moment. The $1B-run-rate deadline is met or missed. Combined with the AMF Singapore 300mm upgrade completion target, this is the analytical horizon for the position.

If all four windows confirm the bull thesis, valuation ranges bull-case price targets become reachable. If any one window confirms the bear thesis, the valuation drifts toward the base/bear range.

Catalyst-calendar uncertainty notes

Several catalysts above carry analyst-estimate dating that should be flagged:

Q1 2026 earnings: confirmed May 5 2026 ✓
Investor Day: confirmed May 7 2026 ✓
2027 Investor Day: ⚠ analyst estimate based on annual-cadence pattern
Customer first-silicon PRs: ⚠ ranges based on industry-typical 12-18 month commercial-PDK-to-product cycle
Mubadala selldown windows: ⚠ pattern-based estimate from 2024 + 2026 events; no public commitment to cadence

Confirmed dates are sourced from GF investor relations and SEC filings; estimated dates are the analyst’s pattern-projection and should be re-verified as primary disclosures emerge.