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Equillium, Inc.

catalyst in 8dNo base rate yet — EQ has 0 graded prints on the record, and the bar is 3.Website
Ticker
EQ
Beat
biopharma
Size
Public Company
Revenue
$0
as of Mar 2026
Cash
$57.2M
as of Jun 2026
Burn
$4.2M/qtr
as of Jun 2026
Runway
~3.4yr at this rate
as of Jun 2026
Researched · Stale
85 days ago
A newer SEC filing has been made since this research was written — check the primary sources before acting on a number here.

A two-asset preclinical option on EQ504 (gut-restricted AhR modulator for UC) wrapped in a >3yr cash runway and tier-1 (RA Capital / Decheng) sponsorship — but at ~$130–185M EV the market is paying real money for a drug no human has yet taken; the entire thesis lives or dies on the mid-2026 Phase 1 PoM readout ~early 2027.

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Equillium, Inc.
EQ · public
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Price

Weekly closes

EQ · weekly close
1.37 USD+11.4%
Friday 30 Oct 2026 · last 52 Fridays 0.85–3.05
pick a pin
Every pin is a dated row
Solid: filed with the SEC, settled at FINRA, or a recorded split. Hollow: the scheduled print, past the last close, never a price.
  1. Short interest: 5,655,364 sh · 10.96 days to cover, FINRA · settled 15 Oct 2026
  2. Next print: in 8 days, Scheduled · 11 Nov 2026, scheduled
1.37USD+11.4%biopharma +5.3%EQ · 112 weekly closes to 2026-10-30

Who is buying

Shares sold shortFINRA · settled 15 Oct 2026
5,655,364 shares
Days to unwind the shortFINRA · settled 15 Oct 2026
10.96
see the whole series
Financials

The reported figures

Revenue · quarterly
$0
latest, Q1 ’26 · 9 periods stored
Filed · primary
Q1 ’26
$0 USD
as of 31 Mar 2026 · fiscal FY2026-Q1
Source: filings/10-q-2026-q1.md
Equillium, Inc., quarterly figures held, Q3 ’23 to Q2 ’26
PeriodAs ofRevenueOperating marginFree cash flowCapexCashNet debtShares outstandingGradingSource
Q3 ’2330 Sept 2023$8.9M USD-40.8% share of revenue——$34.4M USD—35.1M sharesFiled · primarysec.gov
Q4 ’2331 Dec 2023$9.2M USD-34.7% share of revenue-$5.7M USD$35K USD$23.2M USD——Filed · primarysec.gov
Q1 ’2431 Mar 2024$10.7M USD-26.1% share of revenue-$8.8M USD$19K USD$11.6M USD—35.3M sharesFiled · primarysec.gov
Q2 ’2430 Jun 2024$13.9M USD-0.7% share of revenue$668K USD$62K USD$11.1M USD—35.4M sharesFiled · primarysec.gov
Q3 ’2430 Sept 2024$12.2M USD-5.6% share of revenue-$7.7M USD$0 USD$15.4M USD—35.4M sharesFiled · primarysec.gov
Q4 ’2431 Dec 2024$4.4M USD—-$3.3M USD$4K USD$18.1M USD——Filed · primarysec.gov
Q1 ’2531 Mar 2025$0 USD—-$8.2M USD$4K USD$14.5M USD-$14.5M USD35.7M sharesFiled · primaryfilings/10-q-2026-q1.md (prior-year comparative columns)
Q2 ’2530 Jun 2025——-$3.0M USD$0 USD$11.5M USD—59.5M sharesFiled · primarysec.gov
Q3 ’2530 Sept 2025——-$8.4M USD$0 USD$33.1M USD—60.9M sharesFiled · primarysec.gov
Q4 ’2531 Dec 2025$0 USD———$30.3M USD-$30.3M USD61.5M sharesFiled · primaryfilings/10-q-2026-q1.md (Dec-31-2025 balance sheet); filings/10-k-2025-q4.md
Q1 ’2631 Mar 2026$0 USD—-$4.3M USD$3K USD$61.3M USD-$61.3M USD63.2M sharesFiled · primaryfilings/10-q-2026-q1.md
Q2 ’2630 Jun 2026——-$4.2M USD$71K USD$57.2M USD—63.4M sharesFiled · primarysec.gov

Equillium, Inc.’s figures as the company reported them in its filings. Quarters are calendar quarters, so a company whose year ends in January shows each fiscal quarter under the calendar quarter it falls in. An empty slot is a quarter we hold no figure for.

Revenue · quarterlyQ3 ’23 – Q2 ’26
$0

Q1 ’26 · as of Mar 2026

Revenue Q3 ’23: $8.9M, as of Sep 2023Revenue Q4 ’23: $9.2M, as of Dec 2023 (Q4 worked out from the annual total)Revenue Q1 ’24: $10.7M, as of Mar 2024Revenue Q2 ’24: $13.9M, as of Jun 2024Revenue Q3 ’24: $12.2M, as of Sep 2024Revenue Q4 ’24: $4.4M, as of Dec 2024 (Q4 worked out from the annual total)Revenue Q1 ’25: $0, as of Mar 2025Revenue Q4 ’25: $0, as of Dec 2025Revenue Q1 ’26: $0, as of Mar 2026

Lighter bars: Q4 worked out as the full-year total minus the three reported quarters.

Free cash flow · quarterlyQ4 ’23 – Q2 ’26
-$4.2M

Q2 ’26 · as of Jun 2026

Free cash flow Q4 ’23: -$5.7M, as of Dec 2023 (Q4 worked out from the annual total)Free cash flow Q1 ’24: -$8.8M, as of Mar 2024Free cash flow Q2 ’24: $668K, as of Jun 2024Free cash flow Q3 ’24: -$7.7M, as of Sep 2024Free cash flow Q4 ’24: -$3.3M, as of Dec 2024 (Q4 worked out from the annual total)Free cash flow Q1 ’25: -$8.2M, as of Mar 2025Free cash flow Q2 ’25: -$3.0M, as of Jun 2025Free cash flow Q3 ’25: -$8.4M, as of Sep 2025Free cash flow Q1 ’26: -$4.3M, as of Mar 2026Free cash flow Q2 ’26: -$4.2M, as of Jun 2026

Lighter bars: Q4 worked out as the full-year total minus the three reported quarters.

Operating cash flow minus capital spending.

Cash · quarterlyQ3 ’23 – Q2 ’26
$57.2M

Q2 ’26 · as of Jun 2026

Cash Q3 ’23: $34.4M, as of Sep 2023Cash Q4 ’23: $23.2M, as of Dec 2023Cash Q1 ’24: $11.6M, as of Mar 2024Cash Q2 ’24: $11.1M, as of Jun 2024Cash Q3 ’24: $15.4M, as of Sep 2024Cash Q4 ’24: $18.1M, as of Dec 2024Cash Q1 ’25: $14.5M, as of Mar 2025Cash Q2 ’25: $11.5M, as of Jun 2025Cash Q3 ’25: $33.1M, as of Sep 2025Cash Q4 ’25: $30.3M, as of Dec 2025Cash Q1 ’26: $61.3M, as of Mar 2026Cash Q2 ’26: $57.2M, as of Jun 2026Debt Q1 ’25: $0, as of Mar 2025Debt Q4 ’25: $0, as of Dec 2025Debt Q1 ’26: $0, as of Mar 2026

CashDebt

Shares outstanding · quarterlyQ3 ’23 – Q2 ’26
63.4M+81% since Q3 ’23

Q2 ’26 · as of Jun 2026

Shares outstanding Q3 ’23: 35.1M, as of Sep 2023Shares outstanding Q1 ’24: 35.3M, as of Mar 2024Shares outstanding Q2 ’24: 35.4M, as of Jun 2024Shares outstanding Q3 ’24: 35.4M, as of Sep 2024Shares outstanding Q1 ’25: 35.7M, as of Mar 2025Shares outstanding Q2 ’25: 59.5M, as of Jun 2025Shares outstanding Q3 ’25: 60.9M, as of Sep 2025Shares outstanding Q4 ’25: 61.5M, as of Dec 2025Shares outstanding Q1 ’26: 63.2M, as of Mar 2026Shares outstanding Q2 ’26: 63.4M, as of Jun 2026

A rising count is dilution: each existing share owns less of the company.

Latest filing: sec.gov

The record

What happened

What happened
DateTypeWhat happenedSource
2026-10-26filing8-K: EQ504 first patient dosed; $20.0m milestone private placement closesOn 26 Oct 2026 first patient dosed in the EQ504 single ascending dose trial in Australia; milestone closing issued 14,957,260 shares at $0.57 and 20,130,457 pre-funded warrants at $0.5669; gross proceeds $20.0m.agent:company-events · SEC EDGAR 8-K
2026-10-05filing8-K Item 8.01: EQ504 Phase 1 trial cleared by HREC and Australian TGAOn 5 Oct 2026 announced HREC approval and TGA CTN clearance for a Phase 1 trial of EQ504; dosing of healthy participants expected to begin by early November 2026.agent:company-events · SEC EDGAR 8-K
2026-08-10editorial noteVerdict changed: A two-asset preclinical option on EQ504 (gut-restricted AhR modulator for UC) wrapped in a >3yr cash runway and tier-1 (RA Capital / Decheng) sponsorship — but at ~$130–185M EV the m…Before (deep-dive-2026-06-20.md): A two-asset preclinical option on EQ504 (gut-restricted AhR modulator for UC) wrapped in a >3yr cash runway and tier-1 (RA Capital / Decheng) sponsorship — but at ~$130–185M EV the market is paying real money for a drug no human has yet taken; the entire thesis lives or dies on the mid-2026 Phase 1 PoM readout ~early 2027. After (deep-dive-2026-08-10.md): The science got better and the share structure got worse — the AhR→miR-124 link makes EQ504 a credible "upstream of obefazimod" story, but in the same window shareholders armed a 1-for-20 reverse split, doubled authorized shares to 400M, RA Capital's 18.9M-share block was registered for resale, and the President/CSO sold founders stock off-plan; the stock is -31% since June on an EV of roughly $114M, and the mid-2026 Phase 1 that the whole thesis rests on has still not been announced as started.dossier
dossier age
85 days
researched 10 Aug 2026 · ring fills at 180
pick a section
Each column is a section of the dossier
Its height is how many times the section names a filing: 21 mentions across 14 sections. A dashed foot names none.
Primary sources
  1. Refresh delta (since 2026-06-20): What changed (material moves), 696 words, 10 filing mentions
  2. Refresh delta (since 2026-06-20): What held, 175 words, 1 filing mention
  3. Competitive advantages / moat: Competitive advantages / moat, 245 words, no filing mention
  4. Segments / spend allocation: Segments / spend allocation, 119 words, 1 filing mention
  5. Pipeline by phase + latest financials: Pipeline by phase + latest financials, 387 words, 1 filing mention
  6. Call-sentiment shift: Call-sentiment shift, 286 words, no filing mention
  7. Catalyst calendar + mechanism comps: Catalyst calendar + mechanism comps, 189 words, no filing mention
  8. Stock-price catalysts (the tape): Stock-price catalysts (the tape), 199 words, 3 filing mentions
  9. Management: Management, 350 words, 1 filing mention
  10. Forensic red flags: Forensic red flags, 239 words, 3 filing mentions
  11. Forward path, runway and rNPV: Forward path, runway and rNPV, 640 words, no filing mention
  12. Bull vs bear: Bull vs bear, 633 words, no filing mention
  13. Devil's advocate (short-seller): Devil's advocate (short-seller), 500 words, 1 filing mention
  14. Lenses carried by reference: Lenses carried by reference, 194 words, no filing mention
Research

The Equillium, Inc. dossier

The verdict

The science got better and the share structure got worse — the AhR→miR-124 link makes EQ504 a credible "upstream of obefazimod" story, but in the same window shareholders armed a 1-for-20 reverse split, doubled authorized shares to 400M, RA Capital's 18.9M-share block was registered for resale, and the President/CSO sold founders stock off-plan; the stock is -31% since June on an EV of roughly $114M, and the mid-2026 Phase 1 that the whole thesis rests on has still not been announced as started.

Refresh delta (since 2026-06-20)

What changed (material moves)

  1. The stock is down ~31% and the sell-side went loud into the decline. $3.05 (Jun 18) → $2.10 (Aug 10, 11:31 EDT), Market capitalisationThe share price multiplied by the number of shares. What the market says the equity is worth. $132.8M on 63.23M shares; 52-week range now $0.756–$3.540. In the middle of that drawdown, Piper Sandler initiated Overweight, PT $20 (Jul 13) and Clear Street initiated Buy, PT $9 with the stock at $2.47 (Jul 20) — while Zacks cut to Strong Sell (Jul 15). Consensus price targetThe average of what published analysts think the share price should be. An opinion poll, not a forecast. ~$8.56. Two very bullish initiations did not hold the tape.

  2. Shareholders armed a reverse split and doubled the authorized share count. At the 2026 Annual Meeting (May 28), holders approved (a) a reverse stock split at a board-discretion ratio of 1-for-2 to 1-for-20, effectable any time through Dec 31, 2027, and (b) an increase in authorized common from 200,000,000 to 400,000,000 shares. Proposal 4 drew the heaviest dissent of the meeting: 42.7M for vs 11.6M against. This directly reverses a prior-dossier bull point ("did not do a Reverse stock splitMerging several shares into one to lift the share price. It changes nothing about what the company is worth, and is usually done to keep a listing or to prepare a larger raise.").

  3. RA Capital's entire block was registered for resale. The Shelf registration (Form S-3)A filing that pre-clears shares to be sold later, without a fresh approval each time. It does not mean shares have been sold — it means they can be, at short notice. covering 18,878,101 shares (1,179,508 common + 17,698,593 pre-funded-warrant shares) held by RA Capital Healthcare Fund, L.P. was filed Apr 7 and declared effective April 16, 2026. That is ~30% of shares outstanding, freely saleable, in a name that trades thin. The prior dossier recorded the March raise as validation; it did not record the resale overhang that came with it.

  4. Insider selling into the pivot rally — including one of the two named key-person dependencies, off-plan. Stephen Connelly, Ph.D., President & Chief Scientific Officer, sold 200,000 shares at $3.1638 on 2026-06-04 plus 30,975 at $2.9401 on 2026-06-05 (~$724k gross, 2017 founders shares), leaving 762,025 — and the Form 4The filing an insider must make within two business days of buying or selling their own company’s shares. reports aff10b5One = 0, i.e. NOT under a Rule 10b5-1 plan [SEC Form 4The filing an insider must make within two business days of buying or selling their own company’s shares. acc. 0001746808-26-000004; Form 144 acc. 0001974158-26-000071/73]. Separately Christine Zedelmayer, SVP & COO, exercised-and-sold ~567,677 shares across Feb 19 / Mar 9 / Mar 13 / May 27 / Jun 5 at $1.74–$2.93 on $0.73–$0.785 strikes, under a 10b5-1 plan, holding 62,586 common throughout [SEC Forms 4 acc. 0001797818-26-000003/4/8/9/11]. The Form 10-QThe quarterly version of the annual report. Lighter, and not audited. names Steel and Connelly as the two people the company is "highly dependent on".

  5. New science that reframes the competitive story: the AhR → miR-124 axis. At a May 29, 2026 virtual investor event, CSO Connelly presented preclinical data that AhR activation drives miR-124 induction, that both EQ504 and Abivax's obefazimod (ABX464) induce miR-124, and that an AhR antagonist blocks the effect — with molecular modelling and reporter assays identifying obefazimod itself as a moderately potent AhR agonist (EC50 ≈ 400 nM). If it holds, obefazimod moves from competitor with a different mechanism to clinical validation of EQ504's mechanism. This is the strongest new bull input in the window and it is what Piper's $20 is built on.

  6. The Phase 1 hardened in detail and softened in timing. It is a first-in-human SAD/MAD in healthy volunteers in Australia, with CYP1A1 as the primary AhR target-engagement biomarker and IL-22 for mucosal effect; SAD/MAD data in H1 2027. Company language drifted from "mid-2026" to "around mid-year 2026, progressing into the third quarter." As of 2026-08-10 there is no announcement of study initiation or first dosing, and EDGAR shows no company filing of any kind since 2026-06-05 [SEC EDGAR submissions, CIK 0001746466, retrieved 2026-08-10].

  7. A real clinical hire, and a board that got smaller. Snehal Naik, Ph.D. was appointed Chief Development Officer on May 13, 2026 — previously SVP & Head of Clinical Development at Ventyx Biosciences. Meanwhile director Peter Colabuono was not renominated and the board shrank 7 → 6. A ~145,000-option inducement grant at a $3.08 strike was reported Jun 2.

  8. EQ302's language was downgraded. Q1-2026 language is now "evaluating further advancement of EQ302" — softer than the prior dossier's "toxicology/IND-enabling work ongoing." Treat EQ302 as capital-gated optionality, not a funded second program, until a filing says otherwise.

  9. Holder register moved. New: abrdn / Aberdeen Group plc — 3,352,837 shares, 5.3% (Schedule 13GA filing by an investor who has crossed 5% of a company but intends to stay passive. The activist version is a 13D. filed 2026-05-07). ADAR1 Capital 9.9% → 9.5% (13G/A, 2026-05-15). Decheng 8.9% aggregate as of 2026-03-31 (13G/A, 2026-05-15). RA Capital 9.9%, hard-capped by the pre-funded-warrant blocker (Schedule 13GA filing by an investor who has crossed 5% of a company but intends to stay passive. The activist version is a 13D., 2026-03-20) [SEC Schedules 13G/13G-A, CIK 0001746466].

What held

  • The structural thesis is intact. Still one operating segment, $0 revenue, two assets, both preclinical, no approved AhR drug for IBD, and the equity is still a call option struck on the EQ504 Proof of mechanismEvidence that a drug does the biological thing it was designed to do — which is a step short of showing that patients get better. readout. Nothing in the window changed that.
  • Runway is still not the near-term risk. $61.322M cash at Mar 31 2026, no debt, total liabilities $3.596M. "Into 2029" remains management's claim — with a caveat added in Lens 11 below.
  • Sponsorship held. RA Capital, Decheng and ADAR1 are all still on the register at or near their blockers; abrdn is new. Registered-for-resale is not sold.
  • No new legal or enforcement findings. SEC LR and AAER searches return zero through 2026-08-10. The EDGAR UPLOAD dated 2026-04-13 is NOT a comment letter — it is the staff's routine "we have not reviewed and will not review your registration statement" notice on the S-3, signed by the Office of Life Sciences [SEC UPLOAD acc. 0000000000-26-003704, read in full]. Recorded here so a future reader does not mistake it for a review.

Competitive advantages / moat

The moat argument changed shape, not size.

  • The new claim: EQ504's differentiation is no longer only "gut-restricted, non-immunosuppressive AhR modulator." It is now "the upstream node of the pathway obefazimod already validated in Phase 3" — AhR activation drives miR-124; obefazimod is itself a ~400 nM AhR agonist; an AhR antagonist blocks miR-124 induction. Clear Street's note frames the same idea commercially: EQ504's "pleiotropic biology" can "modulate multiple commercially validated cytokines (TNF-α, IL-23, IL-12)".
  • Why this matters: in the prior dossier obefazimod was listed under the competitive set as a "different MoA, miR-124." If the AhR→miR-124 link is real, Abivax's Phase 3 becomes a read-through in EQ504's favour rather than a rival's head start. That is the single largest change in the bull case since June.
  • Why it is not yet a moat: this is company-generated preclinical data presented on a company webinar, not peer-reviewed, not independently replicated, and not in humans. A mechanistic kinship argument also cuts the other way — being upstream of a validated node does not establish that a gut-restricted modulator produces the same systemic benefit, and it invites the question of why one would prefer an unproven upstream agent to an agent with Phase 3 data.
  • IP unchanged: four AhR patent families; composition-of-matter to 2037 (US/KR), 2039 (HK). Bargaining power still essentially zero pre-data.

Net: the moat thesis got a better story and no more evidence. Provenance grade on the central new claim: company-sourced preclinical, unreplicated.

Segments / spend allocation

Still one operating segment; the 10-Q confirms the CODM is the CEO and monitors only net loss, R&D and G&A.

LineQ1 2026Q1 2025Move
R&D$3.0M$5.9M−49% (itolizumab wind-down)
G&A$2.6M$2.9M−10% (lower legal/professional)
Total opex$5.610M$8.870M−37%
Net loss$(5.311)M$(8.654)M−39%

The signature to watch is R&D re-inflating. At $3.0M/qtr, R&D is at a post-pivot trough that assumes almost no clinical spend. A SAD/MAD in Australia plus a CDO hire plus new headcount should push R&D back up through H2 2026 — and if the Q2 print on ~Aug 13 shows R&D still near $3M, that is evidence the Phase 1 has not started, not evidence of discipline.

Pipeline by phase + latest financials

No new quarter has printed. The Q2-2026 10-Q is not on EDGAR as of 2026-08-10 (last filing of any kind: 2026-06-05) and results are expected ~Aug 13, 2026 [SEC EDGAR submissions, CIK 0001746466, retrieved 2026-08-10; web: stockanalysis.com, 2026-08-03]. So the numbers below are still the Q1-2026 set, now with the balance sheet fully extracted into our figures (see the provenance note at the end).

ProgramMoAIndicationPhaseNext catalystChange vs 2026-06-20
EQ504Gut-restricted AhR modulatorUC (lead), pouchitis, GIPreclinicalPhase 1 SAD/MAD, healthy volunteers, Australia; CYP1A1 + IL-22 biomarkers; data H1 2027Location, design and biomarkers now specified; initiation not yet announced
EQ302Oral bi-specific IL-15/IL-21 inhibitorCeliac, IBD, EoEPreclinicalnone disclosedDowngraded language — "evaluating further advancement"
itolizumabanti-CD6 mAbaGVHD/lupusDiscontinued—unchanged

Q1 2026 books (primary, now in the CSV):

Item2026-03-312025-12-31
Cash & equivalents$61.322M$30.277M
Total assets$63.083M$31.887M
Accounts payable$1.295M$0.755M
Accrued expenses$1.609M$1.816M
Total liabilities$3.596M$3.290M
Total debt$0$0
Stockholders' equity$59.487M$28.597M
Accumulated deficit$(221.516)M$(216.205)M
Shares issued & outstanding63,226,55661,464,368
Weighted-avg shares (basic & diluted)96,279,216—
  • Q1 Cash burnHow much more cash goes out than comes in, per period. The clock on a company with no profits. $(4.301)M; Capital expenditureMoney spent on long-lived things — buildings, machines, servers — rather than on running costs. $3k; depreciation $24k; SBC $0.930M; interest income $309k (no interest expense).
  • Correction to the prior dossier: it recorded "$0.76M payables" for Q1-2026. That is the Dec-31-2025 figure; Q1-2026 accounts payable was $1.295M. Immaterial to the thesis, corrected for the record.
  • The share count to use is not 63.2M. The 17,698,593 Pre-funded warrantA right to buy shares that has already been paid for, bar a token penny. It behaves like a share the investor already owns, so leaving it out of a share count understates the company’s real size. are struck at $0.0001 and are economically common; that is why weighted-average diluted shares were 96.3M against 63.2M outstanding. Any market-cap figure built on 63.23M — including the widely quoted $132.8M — understates the real capitalisation by ~28%.
  • Guidance: none. our figures remains empty (the company issues no financial guidance).
  • Consensus and a conflict to surface: an aggregator carries a Q2-2026 EPS estimate of $(0.26). That is arithmetically hard to reconcile — a $(0.26) quarter on ~96M weighted shares implies a ~$25M quarterly net loss against a $5.3M Q1 actual. It is most likely a full-year estimate carried in a quarterly field, or an estimate built on a stale ~20M share count. Not resolved here — flagged so it is not cited as a beat/miss bar on Aug 13.

Call-sentiment shift

There is no earnings call to read, and that is itself the finding. The FY2025 (2026-03-25) and Q1-2026 (2026-05-13) results 8-Ks furnish a press release under Item 2.02 and reference no conference call or webcast; the Q1 press release contains no call or webcast details either. Equillium did hold calls historically (Q4-2024 results, 7:00am ET, 2025-03-27). transcripts/ remains empty (0 files); no clean transcript for FY2025 or Q1-2026 exists on Fool or Insider Monkey. Management-voice sentiment therefore has to be read from written releases and the one investor event.

Sentiment trajectory across the last four disclosures:

DateVehicleTone read
2026-03-25FY2025 results PRConfident pivot framing; "Phase 1 mid-2026," runway into 2029
2026-05-13Q1 PR + CDO hirePeak confidence. "On track to initiate in mid-2026, data ~6 months thereafter"; a senior clinical hire from Ventyx to run it
2026-05-29Virtual investor event (AhR/miR-124)Most assertive science claim to date — obefazimod recast as an AhR agonist, "the first set of data that really highlights that miR-124 is downstream and dependent on AhR activation"
2026-06-05 → presentSilence. No filings, no PRsThe guided window opened and closed with no initiation announcement

The shift that matters is from stated confidence to a 9-week communications gap across the exact window the catalyst was guided into. Two readings are live and this refresh cannot separate them: (a) routine micro-cap summer quiet and they will announce initiation alongside Q2 results, or (b) the study slipped. The Aug 13 print resolves it. Note also that the most bullish management communication of the window (May 29) was delivered by the officer who sold founders stock off-plan six days later — stated separately from any inference about why.

Catalyst calendar + mechanism comps

CatalystWindowChangeSignificance
Q2-2026 results~Aug 13, 2026NEW, imminentShould confirm or deny Phase 1 initiation; watch the R&D line and the Jun-30 cash balance
EQ504 Phase 1 initiation / first doseguided mid-2026 → "into Q3"Slipping; unannouncedGate for the Aug-2025 second closing (~$20M, milestone- + price-conditioned)
EQ504 SAD/MAD dataH1 2027Firmed from "~early 2027"THE binary. CYP1A1 Target engagementA measurement showing the drug actually reached and acted on the thing in the body it was aimed at. + IL-22
Reverse split effectuationboard discretion, any time to Dec 31 2027NEWWould signal a larger raise is being set up
Further financing / ATM2026–2027Capacity expanded (400M authorized)DilutionIssuing new shares, so each existing share owns a smaller slice of the same company.
RA Capital resalelive since Apr 16 2026NEW18.9M-share overhang
EQ302 progressundefinedDowngradedOptionality only

Mechanism comps — materially revised. Abivax / obefazimod moves from the competitor column toward the validation column if the AhR→miR-124 link survives replication. Adial/Azora AT177 (colon-targeted AhR agonist) remains the most direct mechanistic rival. The rest of the UC field — anti-TL1A (Roche, Merck), oral S1P, JAKs, IL-23s — is unchanged and still years ahead on evidence.

Valuation comps: n/a. No EV/Sales, EV/EBIT or P/E is meaningful at $0 revenue.

Stock-price catalysts (the tape)

Price path across the window, each point sourced:

DatePriceSource
2026-04-06$2.01S-3 cover [SEC S-3, 2026-04-07]
2026-06-02$3.08 (option strike)inducement grant
2026-06-04$3.1638Connelly Form 4 sale price
2026-06-18$3.05prior dossier
2026-07-13$2.99
2026-07-20$2.47
2026-08-03$2.18
2026-08-10$2.10

Moves >5% and the honest attribution: the decline is a grind, not an event — there is no single >5% gap tied to a disclosed catalyst in the window, because there were no disclosures after Jun 5. What the tape did do is absorb two bullish initiations without lifting: Piper's Overweight/$20 on Jul 13 came with the stock at ~$2.99 and it is $2.10 four weeks later; Clear Street's Buy/$9 landed Jul 21 at $2.47. A stock that falls ~30% through an $8.56 consensus target is telling you the marginal seller is not reading research — the two candidates on the record are the live 18.9M-share RA Capital resale shelf and officer selling, alongside Short interestHow many shares have been borrowed and sold by people betting the price falls. of 4.71M shares / 4.2 Days to coverHow many normal trading days it would take for everyone betting against the stock to buy back in. A high number means the exit is crowded. as of mid-July. Zacks' Strong Sell cut (Jul 15) is a symptom, not a cause — it is a quant-model rating on a company with no earnings to model.

Management

  • Title correction to the prior dossier. The 10-Q states plainly: Bruce D. Steel serves as Chief Executive Officer (signing as Principal Executive Officer and Principal Financial Officer), and Stephen Connelly, Ph.D. serves as President and Chief Scientific Officer. The prior dossier described Steel as "Co-Founder, President & CEO; also CFO." Steel is CEO+CFO; Connelly is President+CSO. The CEO=CFO governance flag stands and is confirmed by the primary document.
  • New: Snehal Naik, Ph.D., Chief Development Officer (May 13, 2026) — ex-SVP & Head of Clinical Development, Ventyx Biosciences; 15+ years, immunology/inflammation, led global development programs. This is the right hire for the moment: a 14-person company entering first-in-human needs someone who has run clinical operations, and Steel/Connelly are a financier and a bench scientist. Read it as a genuine positive on execution capacity.
  • Board contracted 7 → 6; Peter Colabuono not renominated. Note the vote spread on the two Class II directors: Steel drew 45.96M for / 0.14M withheld, while Charles McDermott drew 36.07M for / 10.02M withheld — a ~22% withhold rate against one director is unusually high and worth a question, though it carries no legal consequence in a plurality election.
  • Skin in the game deteriorated at the officer level. Connelly's direct holding fell 993,000 → 762,025 (−23%) in two days, sold off-plan into the highest prices the stock has seen since 2023. Zedelmayer's direct common has been 62,586 shares throughout, with everything above that monetised on exercise under a 10b5-1 plan. Neither is illegal, and Zedelmayer's pattern is unremarkable (cheap options, scheduled plan). Connelly's is the one that carries information: a discretionary sale by a named key-person dependency, one week after he personally presented the company's most bullish scientific claim, two months before the catalyst he is responsible for.
  • Capital-allocation read unchanged from June — decisive on the pivot, poor on the $216M/8yr itolizumab history. What the window adds is that the same team has now taken standing authority to reverse-split up to 1-for-20 and to double the share count, which is the toolkit for a much larger raise than "into 2029" implies.

Forensic red flags

FlagStatusChange
Reverse-split authority (1:2 to 1:20) + authorized shares 200M → 400MNEW — amberApproved 2026-05-28, board-discretion through 2027-12-31. Not yet effected (no filing since 2026-06-05).
18,878,101-share resale registration for RA CapitalNEW — amberS-3 effective 2026-04-16
Off-plan sale by President/CSONEW — amber200,000 sh @ $3.1638, aff10b5One = 0 [SEC Form 4, 2026-06-05]
Auditor: KPMG → CroweUnchanged; now ratifiedCrowe ratified for FY2026, 54.27M for / 5,234 against
CEO = CFOUnchanged — confirmedSteel signs as PEO and PFO
Going-concernMaterially relievedNo debt; $61.3M cash; equity $59.5M vs $28.6M at YE2025
Revenue recognitionN/A$0 revenue; nothing to recognise
Cash vs earningsCleanQ1 net loss $(5.311)M vs operating burn $(4.301)M; gap is $0.930M SBC + $24k D&A + working capital. No accrual games.
Related-party Ariagen / DechengUnchanged — unresolved$55M milestone terms still not confirmable from on-disk filings
SEC UPLOAD 2026-04-13Benign — do not misreadRoutine "we have not reviewed and will not review" notice on the S-3, Office of Life Sciences [SEC acc. 0000000000-26-003704]
SEC LR / AAERZeroSearch window to 2026-08-10

Dilution arithmetic, stated plainly. 63,226,556 outstanding + 17,698,593 pre-funded warrants = 80,925,149 economic shares today. Authorized capacity is now 400,000,000. The gap between those two numbers is the honest measure of how much dilution the structure permits, and it was quadrupled relative to the outstanding count in a single vote.

Forward path, runway and rNPV

Model status — stated honestly. No pro-forma workbook was built and no model was rebuilt this run. our model is a revenue-driven engine — growth compounds off LTM revenue and every driver is expressed as a % of revenue (opex, capex, ocaPct, oclPct) [verified by reading scripts/research/our model]. With LTM revenue of $0, every projected line resolves to zero and every margin is undefined; the output would be a workbook of zeros carrying false authority. Per the, runway-to-catalyst and rNPV replace the earnings model. our figures was, however, backfilled from the primary filings this run (3 rows: 2025-Q1, 2025-Q4, 2026-Q1) so the next refresh has a real baseline — the prior dossier flagged it empty.

Three-year EPS path. Requested, and computable — but read it as a burn-and-dilution schedule, not an earnings forecast. EPS here is net loss ÷ weighted shares; it does not converge toward profit on any horizon in this window and carries no valuation signal.

FY2026EFY2027EFY2028E
Base — Ph1 runs, no self-funded Ph2loss ~$(21)M / ~96M sh = $(0.22)loss ~$(28)M / ~103M sh = $(0.27)loss ~$(35)M / ~120M sh = $(0.29)
Bull — clean H1-27 PoM, partner or raise at a re-rated price$(0.22)$(0.28)~$(45)M / ~140M sh = $(0.32) (bigger loss is the good case — it means a Phase 2 got funded)
Bear — ambiguous/negative PoM$(0.22)$(0.26)loss cut to ~$(12)M / ~125M sh = $(0.10) (burn slashed; equity ≈ residual cash)

Runway — with a correction to the prior dossier's arithmetic. June's read was "$61.322M ÷ ~$17.2M ≈ 3.6 years." That divides by a trough burn: Q1-2026 R&D of $3.0M is post-itolizumab and pre-clinic. Re-running it on the ramp above:

  • Jun 30 2026E cash ≈ $56M — the Aug 13 print tests this directly.
  • End-2027E ≈ $36M; end-2028E ≈ $5M.

So "into 2029" survives — but only on the assumption that Equillium does not self-fund a Phase 2. The moment a Phase 2 UC efficacy study is committed, this is a 2027–2028 financing story, and the reverse-split authority plus the 400M authorized share count are exactly the instruments that story needs. That is the honest reconciliation of "3.6 years of runway" with "we just quadrupled our issuance headroom."

EV — the number that actually re-rated.

  • Economic shares 80,925,149 × $2.10 = ~$170M capitalisation. Note this is ~28% above the $132.8M headline, which uses 63.23M.
  • Less ~$56M estimated Jun-30 cash → EV ≈ $114M.
  • Against the prior dossier's ~$130–185M EV band at $3.05. The option got roughly 25–35% cheaper while the mechanistic case got stronger. That is the single most decision-relevant sentence in this refresh.

rNPV sketch — unchanged inputs, better entry. $1–2B plausible peak UC sales; ~8–12% preclinical-to-approval PoS for a novel-mechanism GI small molecule. At ~$114M EV the market is paying somewhat less than fair value for a ~1-in-10 shot than it was in June — but "cheaper lottery ticket" is not the same as "de-risked," and the PoS input has not moved because no human has taken the drug.

Brier-style forecasts (recorded for our position log to lift; not logged via our model, per unattended rules):

EQ — EQ504 Phase 1 study confirmed INITIATED (first subject dosed) by 2026-12-31, p ≈ 0.72 — revised down from 0.80 in June. The guided mid-2026 window has passed with no announcement and no filing since Jun 5. EQ — EQ504 SAD/MAD reports a positive CYP1A1 target-engagement signal by 2027-09-30, p ≈ 0.55. Target engagement in healthy volunteers is a substantially lower bar than the mucosal IL-22 readout; do not conflate the two. EQ — board effects a reverse stock split by 2027-12-31, p ≈ 0.40. Authority exists to Dec 2027; at $2.10 there is no Nasdaq compliance need, so this fires mainly as a precursor to an uplisted raise.

Bull vs bear

Bull (updated). The mechanism story got materially better and the price got materially cheaper in the same window. If AhR sits upstream of miR-124, then Abivax's Phase 3 obefazimod programme is doing EQ504's mechanistic validation for it — and EQ504 arrives gut-restricted and non-immunosuppressive, which is precisely the safety axis the UC market pays for. Around that: no debt, $61.3M cash, equity doubled to $59.5M, an actual clinical operator hired to run the study (Naik, ex-Ventyx), RA Capital/Decheng/ADAR1 all still on the register with abrdn newly at 5.3%, and four sell-side houses now positive with a consensus PT of $8.56 against a $2.10 print. EV of ~$114M for a ~10% shot at a $1–2B-peak UC drug, with the first human readout in H1-2027 and cash that reaches it without a forced raise, is a better entry than June offered.

Bear (updated, and it grew a new leg). Everything from June still applies — both assets preclinical, zero human data on EQ504, a team that already burned $216M and eight years on a Phase 3 failure, and a crowded UC field years ahead on evidence. What the window added is structural: (1) shareholders handed the board a 1-for-20 reverse-split authority and 400M authorized shares, which is not the balance sheet of a company that believes it is funded into 2029; (2) 18.9M shares — ~30% of the count — became freely saleable on Apr 16, and the stock has fallen ~30% since regardless of two very bullish initiations; (3) the President & CSO sold founders stock off-plan at the highs, a week after presenting the bull thesis himself; (4) the guided catalyst window opened and closed in silence — no filing of any kind since Jun 5. And the new science is company-generated, unreplicated preclinical data presented on a company webinar. That is a thesis leaning harder on narrative than it was in June, with more paper authorized to sell into it.

Pre-mortem — it is late 2027 and the thesis broke. What happened? The likeliest path is no longer just "the data missed." It is a slow structural bleed that arrives before the data: the Phase 1 slipped from mid-2026 into late 2026, the Aug-2025 second closing (~$20M) never triggered because its milestone and price conditions were not met, the RA Capital block sold into a thin tape through H2-2026, the board effected a reverse split to keep institutional eligibility while raising on the 400M authorization, and by the time H1-2027 SAD/MAD data arrived the share count had doubled — so even a clean CYP1A1 signal re-rated a much larger denominator. The second path is the June path unchanged: ambiguous or negative PoM in H1-2027 and the equity round-trips toward residual cash. The third, smaller: a class-wide AhR safety signal — with the added twist that the miR-124 argument now ties EQ504 to obefazimod's fate, so an Abivax setback would cut both ways where in June it would only have helped.

Are multiples too high? No multiples exist. On an option basis the stock is cheaper than in June — ~$114M EV vs ~$130–185M — for a mechanism story that improved and an execution story that did not. The market has given back roughly a third of the pivot re-rate.

Contrarian read. The thing most likely being mispriced is the gap between the sell-side and the tape. A $20 target and a $9 target published within eight days, on a stock that then falls 30%, is not a disagreement about the drug — it is a disagreement about the share structure. The analysts are modelling the asset; the sellers are trading the shelf. If the resale overhang clears and the Phase 1 dosing is announced, those two things converge upward violently. If the reverse split is effected first, they converge the other way.

Devil's advocate (short-seller)

Where the bull case is thinnest, updated for the window:

  • The headline valuation is wrong in the bulls' favour, and it is being quoted anyway. "$133M market cap" ignores 17.7M pre-funded warrants struck at $0.0001. The real number is ~$170M. Every "cheap relative to peers" comparison built on the headline figure — including the framing behind Piper's "significantly undervalued" — is starting ~28% too low.
  • A $20 price target on a $2.10 stock is a 9.5x, on a molecule no human has taken. That is not a valuation; it is a probability-weighted dream published without the probability. Clear Street's $9 is the same trade at half the leverage. Note what neither can tell you: whether the study started.
  • The company went dark for nine weeks across its own guided catalyst window. No Form 8-KA filing for something that happened between reports and matters enough to tell shareholders now., no PR, no filing of any kind since Jun 5 [SEC EDGAR, retrieved 2026-08-10]. For a company whose entire equity value is "we will dose humans in mid-2026," the absence of a one-paragraph initiation press release is the loudest data point available.
  • Insiders monetised the narrative before the market did. The CSO sold 200,000 founders shares off-plan at $3.16 six days after presenting the miR-124 thesis; the COO has taken her direct common down to 62,586 shares. Management's revealed preference in June was to convert story into cash.
  • They armed the dilution machine while telling you they are funded into 2029. 1-for-20 reverse-split authority through Dec 2027 and authorized shares doubled to 400M, with 11.6M shares voted against the authorization. Companies funded into 2029 do not need 400M authorized shares against an 81M economic count. One of those two statements is load-bearing and it is not the runway one.
  • The new science cuts both ways and bulls only quote one side. If EQ504's value depends on being upstream of miR-124, EQ504's mechanism is now correlated with obefazimod's clinical fate. Bulls booked the read-through and ignored the correlation. It is also unreplicated company data presented on a company webinar by the officer who sold stock a week later.
  • EQ302 was quietly demoted. "Evaluating further advancement" is what a company says when a programme is not funded. The "free option on top" from June should be marked to zero until a filing says otherwise.
  • Assumptions that must all hold for $2.10 to be cheap: (a) the Phase 1 actually started or starts imminently; (b) CYP1A1 engagement is clean in H1-2027; (c) engagement translates to mucosal effect in patients; (d) Phase 2 gets funded without the reverse split and the 400M authorization being used in anger; (e) RA Capital's 18.9M shares do not come out into a thin book. Miss (a) or (e) and the data never gets its fair hearing. Miss (b) and fair value is residual cash — ~$56M against ~81M economic shares is roughly $0.69/share.
  • This is still binary, not a de-rate. A failed or ambiguous PoM does not trim 25%; it takes the equity toward cash.

Lenses carried by reference

  • Company overview: unchanged, see the previous dossier, with two amendments: (i) officer titles corrected in Lens 9 above (Steel = CEO/PFO; Connelly = President & CSO); (ii) EQ302's status downgraded to "evaluating further advancement." One operating segment, $0 revenue, ~14-person headcount, La Jolla, Nasdaq Capital Market — all still current.
  • Supply chain / CDMO: unchanged, see the previous dossier. No new CDMO, CRO or formulation disclosure in the window. The one refinement is that the Phase 1 is now confirmed ex-US (Australia), which the prior dossier flagged as a possibility.
  • Management questions: unchanged, see the previous dossier (15 questions). Five to add for the Aug 13 print: (1) Has the EQ504 Phase 1 dosed its first subject — and if not, what is the specific gating item? (2) Under what conditions would the board effect the reverse split, and why was 1-for-20 sought rather than a narrower range? (3) Why increase authorized shares to 400M if cash funds operations into 2029? (4) Did the Aug-2025 second closing (~$20M) trigger, and if not, which condition failed? (5) Is EQ302 funded in the FY2026 budget, or is "evaluating further advancement" a deferral?

How our view changed

2 dossiers

Every dossier we have written on Equillium, Inc., newest first, including where a later one corrected an earlier one.

  1. current

    The science got better and the share structure got worse

    CorrectionCorrection to the prior dossier: it recorded "$0.76M payables" for Q1-2026.

  2. A two-asset preclinical option on EQ504 (gut-restricted AhR modulator for UC) wrapped in a >3yr cash runway and tier-1 (RA Capital / Decheng) sponsors…

Company details

IndustryBiopharma
SizePublic Company
WebsiteVisit Equillium, Inc.

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