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SC 13D ·Filed Sep 25, 2026

ETRA

Electra Therapeutics, Inc.
NEUTRAL
Impact 5/10
Horizonweeks Processed1mo ago SEC0000947871-26-000898
Activist investor acquires 5%+ stake
Actionable Insight • Neutral

Monitor for any amendments to this 13D indicating a shift from passive to active stance, such as board representation demands or strategic review proposals. The 180-day lock-up expires around March 2027, after which OrbiMed's selling activity could pressure the stock.

DirectionNeutral
Confidencehigh
Horizonweeks
Latest settled — T+20d
ETRA ▼ -26.06% at T+20d
NEUTRAL call -26.06% · α vs SPY -26.03% · entry $11.32 → $8.37
Next anchor: T+60d in 8w
Entry = T+0 close
Sep 25, 2026
via day close
T+1d
+0.27%
call +0.27% · α +0.45%
$11.35
settled 29d ago
T+5d
-13.96%
call -13.96% · α -15.16%
$9.74
settled 25d ago
T+20d
-26.06%
call -26.06% · α -26.03%
$8.37
settled 4d ago
T+60d
Pending
in 8w

Price Chart

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Executive Summary

OrbiMed Advisors, a healthcare-focused investment firm, filed a Schedule 13D disclosing beneficial ownership of 6,885,170 shares (11.0%) of Electra Therapeutics, Inc. The stake was acquired through a series of preferred stock investments and IPO participation, with OrbiMed's Carl L. Gordon serving on Electra's board. The filing states the investment is passive with no current plans for control or major changes, but the 13D filing signals potential for future engagement.

Key Financial Metrics

Stake
11%
Investor
OrbiMed Advisors LLC

Key Facts

  • OrbiMed Advisors LLC and related entities hold 6,885,170 shares, representing 11.0% of Electra Therapeutics' outstanding common stock.
  • The stake is held through two funds: OPI VII (5,126,891 shares, 8.2%) and Genesis (1,758,279 shares, 2.8%).
  • Carl L. Gordon, a member of OrbiMed Advisors, serves on Electra's board of directors.
  • Shares were acquired through conversion of Series A, B, and C preferred stock and IPO purchases at $15.00 per share.
  • The filing states no current plans for control, mergers, asset sales, board changes, or other major corporate actions.
  • Registration rights and a 180-day lock-up agreement are in place post-IPO.

Financial Impact

OrbiMed's total stake value is approximately $103.3 million based on the $15.00 IPO price, representing 11.0% ownership.

ownership concentrationvoting power

Risk Factors

  • OrbiMed could increase its stake or seek changes in strategy, board composition, or capital allocation, creating uncertainty.
  • Post-lock-up, OrbiMed may sell a portion of its 11% stake, potentially weighing on the stock.
  • The filing's passive language may not preclude future activist engagement, especially given OrbiMed's board seat.

Investment Themes

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
SC 13D Filing (Primary)0000947871-26-000898
Document: 0000947871-26-000898-index-headers.html0000947871-26-000898
Document: 0000947871-26-000898-index.html0000947871-26-000898
Document: 0000947871-26-000898.txt0000947871-26-000898
12 reports for ETRA
Performance horizon
50% Hit rate @ T+1 2 of 4 directional calls Went positive at some point 2 of 4 best @ T+1▲ +5.06%Sep 17, 2026
Filters
Rows
Reports for ETRA — sortable, filterable
TypeNow
Sep 28, 2026
28d ago
SC 13G
NEUTRAL ★ 3/10
$11.35 $11.25▼ −0.88%▼ −0.68%$8.37 (−26.26%)
Sep 28, 2026
28d ago
SC 13G
NEUTRAL ★ 3/10
$11.35 $11.25▼ −0.88%▼ −0.68%$8.37 (−26.26%)
Sep 25, 2026
4w ago
SC 13D
NEUTRAL ★ 5/10
$11.32 $11.35▲ +0.27%▲ +0.45%$8.37 (−26.06%)
Sep 23, 2026
4w ago
Insider Cluster
BULLISH ★ 6/10
$11.82 $11.55▼ −2.28%▼ −2.83%$8.37 (−29.19%)
Sep 21, 2026
5w ago
3
NEUTRAL ★ 2/10
$13.62 $12.67▼ −6.97%▼ −6.25%$8.37 (−38.55%)
Sep 18, 2026
5w ago
424B4
BULLISH ★ 7/10
$13.92 $13.62▼ −2.16%▼ −2.14%$8.37 (−39.87%)
Sep 18, 2026
5w ago
3
NEUTRAL ★ 3/10
$13.92 $13.62▼ −2.16%▼ −2.14%$8.37 (−39.87%)
Sep 18, 2026
5w ago
3
NEUTRAL ★ 2/10
$13.92 $13.62▼ −2.16%▼ −2.14%$8.37 (−39.87%)
Sep 18, 2026
5w ago
3
NEUTRAL ★ 2/10
$13.92 $13.62▼ −2.16%▼ −2.14%$8.37 (−39.87%)
Sep 18, 2026
5w ago
EFFECT
BULLISH ★ 7/10
$13.25 $13.92▲ +5.06%▲ +3.51%$8.37 (−36.83%)
Showing 10 of 12

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Report published Sep 25, 2026