← United States · Coverage record
US · SEC FORM 4
STANDARD BIOTOOLS INC.
LAB · Nasdaq · CIK 0001162194 · Healthcare · Medical Devices
INSIDER SIGNAL
No active buy signal
0 qualifying P purchase groups
in the current 180-day scoring window
15 Form 4 transaction lines observed in the same window
0 sales · 15 option, withholding, award, gift or other lines
Last qualifying purchase2025-12-04 · CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. · $217.5K
WHY NO ACTIVE SIGNAL?
Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
AprMayJunJulAugSepOct
Mackay SeanSVP & Chief Business Officer
○○○
Kim Hanjoon AlexChief Financial Officer
○○○
Egholm MichaelPresident & CEO
○○○
Witney FrankDirector
○
HIBBS KATHY LDirector
○
ELOI FENEL MDirector
○
● Purchase▼ Sale○ Other
Showing the six most active owners; 3 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
No recorded active-signal snapshot
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-12-04 · CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P..
Recent Form 4 activity
15Purchases
0Sales
28Other Form 4 lines
31SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER15 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 2,520,686
- Previous report
- 2,593,308
- Avg daily volume
- 925,491
- Days to cover
- 2.7
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-12-04 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 150,000 | USD 1.45 | USD 217,500 | SEC filing ↗ |
| 2025-12-03 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 75,000 | USD 1.44 | USD 108,000 | SEC filing ↗ |
| 2025-12-02 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 125,000 | USD 1.42 | USD 177,500 | SEC filing ↗ |
| 2025-11-25 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 7,550,000 | USD 1.30 | USD 9,815,000 | SEC filing ↗ |
| 2025-11-24 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 150,000 | USD 1.43 | USD 214,500 | SEC filing ↗ |
| 2025-11-20 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 450,000 | USD 1.30 | USD 585,000 | SEC filing ↗ |
| 2025-11-19 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 350,000 | USD 1.28 | USD 448,000 | SEC filing ↗ |
| 2025-11-18 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 275,000 | USD 1.23 | USD 338,250 | SEC filing ↗ |
| 2025-11-17 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 225,000 | USD 1.22 | USD 274,500 | SEC filing ↗ |
| 2025-11-14 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 250,000 | USD 1.24 | USD 310,000 | SEC filing ↗ |
| 2025-11-13 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 450,000 | USD 1.20 | USD 540,000 | SEC filing ↗ |
| 2025-11-12 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 375,000 | USD 1.19 | USD 446,250 | SEC filing ↗ |
| 2025-11-11 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 300,000 | USD 1.20 | USD 360,000 | SEC filing ↗ |
| 2025-11-10 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 275,000 | USD 1.17 | USD 321,750 | SEC filing ↗ |
| 2025-11-07 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 225,000 | USD 1.12 | USD 252,000 | SEC filing ↗ |
Form 4 evidence
43 transaction lines in the latest 365-day window; 420 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-20 | Mackay Sean | Tax withholding (F) | Common Stock | 25,729 | USD 0.67 | USD 17,238 | SEC filing ↗ |
| 2026-08-20 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 28,195 | USD 0.67 | USD 18,891 | SEC filing ↗ |
| 2026-08-20 | Egholm Michael | Tax withholding (F) | Common Stock | 97,627 | USD 0.67 | USD 65,410 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-20 | Mackay Sean | Tax withholding (F) | Common Stock | 25,729 | USD 0.67 | USD 17,238 | SEC filing ↗ |
| 2026-08-20 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 28,195 | USD 0.67 | USD 18,891 | SEC filing ↗ |
| 2026-08-20 | Egholm Michael | Tax withholding (F) | Common Stock | 97,627 | USD 0.67 | USD 65,410 | SEC filing ↗ |
| 2026-08-03 | Egholm Michael | Tax withholding (F) | Common Stock | 362,625 | USD 0.87 | USD 315,484 | SEC filing ↗ |
| 2026-07-23 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 202,476 | USD 0.90 | USD 182,228 | SEC filing ↗ |
| 2026-06-20 | Mackay Sean | Award / grant (A) | Common Stock | 500,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | Witney Frank | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | HIBBS KATHY L | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | ELOI FENEL M | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | Cox Troy | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | Casdin Eli | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-18 | Carey Thomas D. | Award / grant (A) | Common Stock | 99,116 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-20 | Mackay Sean | Tax withholding (F) | Common Stock | 25,729 | USD 1.00 | USD 25,729 | SEC filing ↗ |
| 2026-05-20 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 18,871 | USD 1.00 | USD 18,871 | SEC filing ↗ |
| 2026-05-20 | Egholm Michael | Tax withholding (F) | Common Stock | 97,626 | USD 1.00 | USD 97,626 | SEC filing ↗ |
| 2026-04-06 | Kim Hanjoon Alex | Option exercise / conversion (M) | Common Stock | 70,183 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-06 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 21,301 | USD 0.91 | USD 19,384 | SEC filing ↗ |
| 2026-04-06 | Egholm Michael | Option exercise / conversion (M) | Common Stock | 196,513 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-06 | Egholm Michael | Tax withholding (F) | Common Stock | 95,014 | USD 0.91 | USD 86,463 | SEC filing ↗ |
| 2026-02-26 | Cox Troy | Award / grant (A) | Common Stock | 57,264 | USD 1.17 | USD 66,999 | SEC filing ↗ |
| 2026-02-26 | Casdin Eli | Award / grant (A) | Common Stock | 52,991 | USD 1.17 | USD 61,999 | SEC filing ↗ |
| 2026-02-26 | Carey Thomas D. | Award / grant (A) | Common Stock | 51,282 | USD 1.17 | USD 60,000 | SEC filing ↗ |
| 2026-02-23 | Mackay Sean | Tax withholding (F) | Common Stock | 19,661 | USD 1.15 | USD 22,610 | SEC filing ↗ |
| 2026-02-23 | Kim Hanjoon Alex | Tax withholding (F) | Common Stock | 12,740 | USD 1.15 | USD 14,651 | SEC filing ↗ |
| 2026-02-23 | Egholm Michael | Tax withholding (F) | Common Stock | 66,127 | USD 1.15 | USD 76,046 | SEC filing ↗ |
| 2025-12-04 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 150,000 | USD 1.45 | USD 217,500 | SEC filing ↗ |
| 2025-12-03 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 75,000 | USD 1.44 | USD 108,000 | SEC filing ↗ |
| 2025-12-02 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 125,000 | USD 1.42 | USD 177,500 | SEC filing ↗ |
| 2025-11-25 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 7,550,000 | USD 1.30 | USD 9,815,000 | SEC filing ↗ |
| 2025-11-24 | CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC; Casdin Capital, LLC; Casdin Eli; Casdin Partners GP, LLC; Casdin Partners Master Fund, L.P.; Casdin Private Growth Equity Fund II GP, LLC; Casdin Private Growth Equity Fund II, L.P.; Casdin Private Growth Equity Fund, L.P. | Purchase (P) | Common Stock, $0.001 par value per share | 150,000 | USD 1.43 | USD 214,500 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | LAB |
| CIK | 0001162194 |
| Sector | Healthcare |
| Industry | Medical Devices Yahoo Finance |
| SEC SIC | 2834 Pharmaceutical Preparations |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 420 transaction lines from 2020-02-04 to 2026-08-20 79 P purchase lines · 10 S sale lines · 331 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.