ILMN options flow: unusual options activity in Illumina, Inc.
Updated 28 September 2026, 09:54 ET
Over the last week the tape recorded 49 unusual options prints in Illumina, Inc. (ILMN), $3.1M of tracked premium, close to even between bullish and bearish premium. Bullish premium was $1.5M against $1.4M bearish; $1.9M went into calls and $1.2M into puts, a put call ratio of 0.60. The largest print was $395K of ILMN 16 Oct 2026 $230 puts on 22 September 2026, executed at ask. The last session with prints, 28 September 2026, added 2 prints and $65K of premium. ILMN closed at $270.00 on 25 September 2026, down 1.4%.
This week's unusual flow
Prints from 21 September 2026 to 28 September 2026, 6 sessions. Delayed tier: every print is shown twenty minutes after it executed, and the page is rebuilt after each session.
Net premium is bullish minus bearish premium. The put call ratio is put premium divided by call premium, weighted by money rather than by contract count. Sweeps is the share of prints executed across several exchanges at once. Read the guide: Reading the Pulse.
Largest prints of the week
| Date | Contract | Type | Size | Open int. | Premium | Execution | Sentiment | Tier |
|---|---|---|---|---|---|---|---|---|
| 22 Sep 2026 | ILMN 16 Oct 2026 $230 puts | Trade | 500 | 307 | $395K | At ask | Bearish | High conviction |
| 24 Sep 2026 | ILMN 21 Jan 2028 $350 calls | Sweep | 65 | 0 | $313K | At ask | Bullish | High conviction |
| 21 Sep 2026 | ILMN 16 Oct 2026 $230 puts | Trade | 250 | 46 | $150K | Below bid | Bullish | Notable |
| 24 Sep 2026 | ILMN 21 Jan 2028 $210 calls | Sweep | 13 | 25 | $139K | At bid | Bearish | Notable |
| 24 Sep 2026 | ILMN 16 Oct 2026 $260 puts | Trade | 100 | 26 | $123K | At bid | Bullish | Notable |
| 24 Sep 2026 | ILMN 20 Nov 2026 $330 calls | Sweep | 98 | 0 | $116K | Above ask | Bullish | High conviction |
| 24 Sep 2026 | ILMN 21 Jan 2028 $210 calls | Trade | 10 | 25 | $107K | At bid | Bearish | |
| 24 Sep 2026 | ILMN 16 Oct 2026 $280 calls | Sweep | 100 | 125 | $105K | At bid | Bearish | Notable |
| 23 Sep 2026 | ILMN 21 Jan 2028 $180 calls | Trade | 9 | 48 | $95K | At ask | Bullish | |
| 23 Sep 2026 | ILMN 20 Nov 2026 $210 calls | Trade | 16 | 1 | $82K | At bid | Bearish | Notable |
| 24 Sep 2026 | ILMN 15 Jan 2027 $135 calls | Trade | 5 | 183 | $71K | At ask | Neutral | |
| 21 Sep 2026 | ILMN 16 Oct 2026 $240 puts | Trade | 50 | 26 | $59K | At bid | Bullish | Notable |
Size above open interest means the trade opened a position larger than everything that existed in the contract the night before. Above ask and below bid are the most aggressive executions. Read the guide: Size versus open interest.
Where the money is aimed
| Expiry | Prints | Premium | Calls share | Net premium |
|---|---|---|---|---|
| 16 Oct 2026 | 18 | $1.3M | 23% | -$144K |
| 21 Jan 2028 | 5 | $681K | 100% | +$137K |
| 20 Nov 2026 | 13 | $596K | 87% | +$220K |
| 15 Jan 2027 | 7 | $285K | 100% | -$20K |
| 18 Dec 2026 | 4 | $127K | 79% | -$63K |
| 17 Jun 2027 | 2 | $89K | 47% | -$5K |
The most premium, $1.3M, is aimed at the 16 Oct 2026 expiry.
A print in a contract expiring this week is a view about the next few days, often about a known event; a print months out is a different kind of statement. Read the guide: 0DTE options flow.
The last session, 28 September 2026
| Date | Contract | Type | Size | Open int. | Premium | Execution | Sentiment | Tier |
|---|---|---|---|---|---|---|---|---|
| 28 Sep 2026 | ILMN 20 Nov 2026 $280 puts | Trade | 12 | 17 | $40K | At bid | Bullish | |
| 28 Sep 2026 | ILMN 20 Nov 2026 $185 calls | Trade | 3 | 0 | $25K | At bid | Neutral |
Every print in ILMN with its full detail, the live tape, one tap filters and saved screeners: open ILMN in Options Sentiment Screener.
Price
The live quote and the price chart sit beside the ticker's flow in the app: open ILMN in Options Sentiment Screener.
Analysts
The most recent analyst targets on file, from 14 firms, have a median of $218, 19.4% below the last close. The last 90 days brought 1 upgrade.
Calls bought at a strike above the average target are a bet that the analysts are too cautious; puts far below the price in a name they like are protection or a strong disagreement. Read the guide: Reading one ticker's flow.
About Illumina, Inc.
- Exchange
- Nasdaq
- Sector
- Health Care
- Industry
- Measuring And Control Equipment
- Headquarters
- San Diego, California
- Website
- illumina.com
Illumina, Inc. provides sequencing and array-based solutions for genetic and genomic analysis. Its products and services serve customers in a range of markets enabling the adoption of genomic solutions in research and clinical settings. The company markets and distributes its products directly to customers in North America, Europe, Latin America, and Asia-Pacific region.
In the same sector
Flow pages for other Health Care names in the S&P 500:
LLY Eli Lilly & Co.JNJ Johnson & JohnsonABBV AbbVie Inc.MRK Merck & Co. Inc.UNH UnitedHealth Group Inc.TMO Thermo Fisher Scientific Inc.AMGN Amgen Inc.GILD Gilead Sciences, Inc.
Learn
- What unusual options activity means
- Reading one ticker's flow
- Sweeps, blocks and where a trade printed
- Size versus open interest
- Bullish or bearish, how a print's sentiment is inferred
- The conviction score and whale prints
The live tape for ILMN with every print's execution detail, one tap filters for calls, puts, sweeps and 0DTE, saved screeners and, for Realtime subscribers, push alerts and no delay. The same screen is in the iOS and Android apps.
Open ILMN in Options Sentiment Screener