SEC Form 4
Bicycle Therapeutics plc (BCYC) insider trading
In the 12 months to Oct 26, 2026, 2 BCYC insiders reported open-market sales of $16.6K across 4 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $16.6K
- 4 filings · 2 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 4 of 4
- All $16.6K sold was pre-arranged
Who traded BCYC, and when
- Sale
- Sale, pre-arranged (10b5-1)
BCYC daily close from Oct 27, 2025 to Oct 26, 2026, between $3.38 and $8.76, last $3.62. 4 sale and 0 purchase filings by 2 insiders, marked at their filing dates. Alethia Young, Chief Financial Officer: sold $12.3K across 1 filing, first filed Jan 6, 2026, last Jan 6, 2026. Jennifer Scott Perry, Chief Operating Officer: sold $4.4K across 3 filings, first filed Apr 6, 2026, last Oct 7, 2026.
Largest mark · tap a row for others
Alethia Young · Chief Financial Officer
Sale $12,282
1,878 shares
Filed Jan 6, 2026 · traded Jan 5
Pre-arranged (10b5-1) · close on filing date $6.57
Alethia Young · Chief Financial Officer
Chief Financial Officer
$12.3K soldJennifer Scott Perry · Chief Operating Officer
Chief Operating Officer
$4.4K soldOpen-market trades
4 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Alethia Young | Chief Financial Officer | $12.3K | — | 1 | 100% of sales | |
| Jennifer Scott Perry | Chief Operating Officer | $4.4K | — | 3 | 100% of sales |
| Filed | Insider | Type | Shares | Value | Held after | Source |
|---|---|---|---|---|---|---|
traded | Jennifer Scott Perry Chief Operating Officer | SalePre-arranged (10b5-1) | 326 ordinary shares | $1.2K | 89,602 | |
traded | Jennifer Scott Perry Chief Operating Officer | SalePre-arranged (10b5-1) | 333 ordinary shares | $1.4K | 91,052 | |
traded | Jennifer Scott Perry Chief Operating Officer | SalePre-arranged (10b5-1) | 333 ordinary shares | $1.7K | 92,464 | |
traded | Alethia Young Chief Financial Officer | SalePre-arranged (10b5-1) | 1,878 ordinary shares | $12.3K | 87,081 |
Shares are as filed (ordinary shares or ADS); values are as converted to US$ in the filing.
GET /stocks/filings/vX/form-4?tickers=BCYC&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"BCYC"
],
"issuer_cik": "0001761612",
"owner_cik": "0002119908",
"accession_number": "0002119908-26-000013",
"form_type": "4/A",
"filing_date": "2026-10-07",
"period_of_report": "2026-10-02",
"issuer_name": "BICYCLE THERAPEUTICS PLC",
"issuer_trading_symbol": "BCYC",
"owner_name": "Perry Jennifer Scott",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Operating Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Ordinary Shares",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-05",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 326,
"transaction_price_per_share": 3.78,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 89602,
"transaction_value": 1232.28,
"date_of_original_submission": "2026-10-06",
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F4",
"description": "This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on March 27, 2025."
},
{
"id": "F2",
"description": "The original Form 4 inadvertently overstated the number of shares sold, weighted average price and the number of shares beneficially owned following the reported transactions. This amendment correctly states the number of shares sold, weighted average price and the number of shares beneficially owned following the reported transactions."
}
]
},
{
"tickers": [
"BCYC"
],
"issuer_cik": "0001761612",
"owner_cik": "0002119908",
"accession_number": "0002119908-26-000011",
"form_type": "4",
"filing_date": "2026-10-06",
"period_of_report": "2026-10-02",
"issuer_name": "BICYCLE THERAPEUTICS PLC",
"issuer_trading_symbol": "BCYC",
"owner_name": "Perry Jennifer Scott",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Operating Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Ordinary Shares",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-05",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 326,
"transaction_price_per_share": 3.78,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 89552,
"transaction_value": 1232.28,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F4",
"description": "This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on March 27, 2025."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 59 records
- Tax withholding (sold to cover)43 records
- Grants and awards16 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.
Frequently asked questions
Has Bicycle Therapeutics plc's CEO sold stock?
No. Kevin Lee (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is BCYC’s insider data?
These are BCYC Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track BCYC insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for BCYC every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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