greeksoup/ stock research
Stock research / United States / TMO / Short interest

Thermo Fisher Scientific Inc. short interest

4.9M shares of Thermo Fisher Scientific were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (3.5M to 5.7M). Short sellers would need 2.1 days of normal trading to buy them back.

Shares sold short4.9Mat 15 Oct 2026
Change on the settlement before-9.6%+25% over a year
Days to cover2.15at 2.3M shares a day
Of shares in issue1.32%shares short over shares outstanding
New to this? How to read this page
  1. Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back.
  2. Days to cover is shares short over an average day's trading: how many days it would take short sellers to buy them all back. Above 5 or so is high.
  3. Rising short interest says more investors are betting against the stock. A crowded short can also rise fast if shorts rush to buy back.
  4. Brokers report it twice a month to FINRA, about ten days after each settlement date.
  5. What is short interest?

Short interest, days to cover and the price

Short interest is near the middle of its range over the last year (3.5M to 5.7M), and the share price moved +32% over the last year.

Shares sold shortDays to coverShare price

Three charts on one timeline. Top: shares sold short at each settlement. Middle: days to cover, taller meaning shorts would need longer to buy back. Bottom: the share price, so you can see whether shorts added as the price fell or rose.

How it compares

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20264.9M-9.6%2.3M2.15
    30 September 20265.4M+7.7%2.6M2.07
    15 September 20265.0M-11.8%1.8M2.74
    31 August 20265.7M+19.9%1.7M3.39
    14 August 20264.7M-4.8%1.7M2.86
    31 July 20265.0M-5.9%2.6M1.90
    15 July 20265.3M-1.0%1.8M2.98
    30 June 20265.4M+21.1%2.4M2.19
    15 June 20264.4M-5.9%2.2M2.05
    29 May 20264.7M-1.7%2.8M1.67
    15 May 20264.8M-1.9%2.5M1.91
    30 April 20264.9M+7.2%2.3M2.12
    15 April 20264.5M+11.5%1.7M2.72
    31 March 20264.1M+5.0%2.1M1.93
    13 March 20263.9M+9.4%2.2M1.76
    27 February 20263.5M-0.3%2.0M1.82
    13 February 20263.6M-25.5%2.8M1.25
    30 January 20264.8M+22.8%2.8M1.70
    15 January 20263.9M-0.4%2.6M1.50
    31 December 20253.9M-23.3%1.4M2.75
    15 December 20255.1M-0.3%1.6M3.23
    28 November 20255.1M-6.6%1.6M3.21
    14 November 20255.5M+23.9%1.7M3.21
    31 October 20254.4M+12.8%2.0M2.16
    15 October 20253.9M-8.4%2.5M1.60
    30 September 20254.3M+11.5%2.7M1.56
    15 September 20253.8M-2.9%1.5M2.51
    29 August 20253.9M+3.2%1.7M2.38
    15 August 20253.8M+3.0%2.1M1.84
    31 July 20253.7M-3.2%3.9M1.00
    15 July 20253.8M-13.2%2.5M1.54
    30 June 20254.4M-10.1%3.0M1.46
    13 June 20254.9M+3.6%2.5M1.93
    30 May 20254.7M+3.7%2.4M1.96
    15 May 20254.6M+0.8%3.1M1.48
    30 April 20254.5M-5.3%2.9M1.59
    15 April 20254.8M+21.4%3.2M1.52
    31 March 20253.9M-7.5%1.6M2.45
    14 March 20254.3M+2.9%1.9M2.23
    28 February 20254.1M+7.6%1.9M2.21
    14 February 20253.9M-2.3%2.0M1.91
    31 January 20253.9M+14.0%2.1M1.92
    15 January 20253.5M-1.6%2.2M1.59
    31 December 20243.5M-11.0%1.6M2.15
    13 December 20244.0M+11.8%2.2M1.81
    29 November 20243.5M+9.5%2.4M1.45
    15 November 20243.2M+10.2%1.6M1.99
    31 October 20242.9M-3.9%1.5M2.01
    15 October 20243.1M-11.5%1.1M2.67
    30 September 20243.4M-13.6%1.3M2.74
    13 September 20244.0M+12.6%1.4M2.94
    30 August 20243.5M+6.8%893K3.97
    15 August 20243.3M-7.3%1.3M2.46
    31 July 20243.6M+17.6%1.9M1.87
    15 July 20243.0M-10.1%1.3M2.29
    28 June 20243.4M+6.1%2.4M1.44
    14 June 20243.2M-1.6%1.2M2.60
    31 May 20243.2M+15.8%1.4M2.38
    15 May 20242.8M+1.2%1.4M2.06
    30 April 20242.8M+7.0%1.6M1.73
    15 April 20242.6M+0.2%1.1M2.26
    28 March 20242.6M-24.8%1.2M2.07
    15 March 20243.4M+16.8%1.6M2.16
    29 February 20242.9M+1.2%1.0M2.82
    15 February 20242.9M+1.0%1.4M2.03
    31 January 20242.9M-1.6%2.1M1.34
    12 January 20242.9M-0.2%2.1M1.37
    29 December 20232.9M+0.5%1.2M2.44
    15 December 20232.9M+16.4%2.1M1.42
    30 November 20232.5M-7.9%1.7M1.51
    15 November 20232.7M-1.3%1.9M1.44
    31 October 20232.8M+0.6%2.7M1.04
    13 October 20232.7M+13.7%1.4M1.96
    29 September 20232.4M-13.1%1.3M1.87
    15 September 20232.8M+6.2%1.9M1.47
    31 August 20232.6M+2.0%1.1M2.42
    15 August 20232.6M-15.8%1.1M2.37
    31 July 20233.0M+11.5%2.2M1.38
    14 July 20232.7M-2.7%1.2M2.25
    30 June 20232.8M+1.7%1.9M1.51
    15 June 20232.8M-11.2%1.7M1.67
    31 May 20233.1M+3.3%1.8M1.75
    15 May 20233.0M-1.7%1.4M2.10
    28 April 20233.1M+3.7%1.8M1.70
    14 April 20232.9M-3.1%950K3.10
    31 March 20233.0M+5.5%1.1M2.71
    15 March 20232.9M+15.3%1.2M2.32
    28 February 20232.5M-5.6%1.2M2.05
    15 February 20232.6M+12.1%1.3M2.08
    31 January 20232.4M-22.5%1.7M1.38
    13 January 20233.0M+8.1%2.1M1.48
    30 December 20222.8M-7.2%1.1M2.59
    15 December 20223.0M+6.1%1.5M2.09
    30 November 20222.9M-3.7%1.4M2.05
    15 November 20223.0M+1.9%1.7M1.73
    31 October 20222.9M-3.2%2.2M1.34
    14 October 20223.0M+4.7%1.3M2.24
    30 September 20222.9M-8.3%1.3M2.18
    15 September 20223.1M+19.1%1.2M2.69
    31 August 20222.6M-6.3%877K3.01
    15 August 20222.8M+5.7%1.1M2.67
    29 July 20222.7M-3.0%1.6M1.69
    15 July 20222.7M-7.0%1.2M2.22
    30 June 20223.0M+13.6%1.3M2.35
    15 June 20222.6M-14.4%1.1M2.43
    31 May 20223.0M-8.0%1.6M1.86
    13 May 20223.3M-2.7%1.4M2.29
    29 April 20223.4M+39.4%1.8M1.84
    14 April 20222.4M-13.5%1.4M1.80
    31 March 20222.8M+4.5%1.4M2.03
    15 March 20222.7M+0.4%1.5M1.83
    28 February 20222.7M+3.3%1.7M1.57
    15 February 20222.6M+7.5%1.6M1.62
    31 January 20222.4M-11.2%1.9M1.26
    14 January 20222.7M+8.0%2.0M1.33
    31 December 20212.5M-7.5%1.0M2.43
    15 December 20212.7M-2.6%1.5M1.87
    30 November 20212.8M+6.1%1.5M1.91
    15 November 20212.6M+7.6%1.3M2.09
    29 October 20212.4M-5.9%1.2M2.10
    15 October 20212.6M+1.0%1.1M2.38
    30 September 20212.6M-0.5%1.9M1.38
    15 September 20212.6M-3.7%1.1M2.40
    31 August 20212.7M-5.2%962K2.79
    13 August 20212.8M-4.4%836K3.39
    30 July 20213.0M-1.2%1.2M2.56
    15 July 20213.0M-1.5%1.2M2.57
    30 June 20213.0M+8.4%1.9M1.64
    15 June 20212.8M-12.9%2.3M1.20
    28 May 20213.2M-8.2%1.6M2.05
    14 May 20213.5M+10.1%1.3M2.65
    30 April 20213.2M-1.5%1.5M2.13
    15 April 20213.2M+19.1%1.3M2.56
    31 March 20212.7M-13.3%1.7M1.63
    15 March 20213.1M+14.0%2.0M1.59
    26 February 20212.8M-3.4%1.6M1.69
    12 February 20212.8M-3.3%1.5M1.84
    29 January 20212.9M+17.6%1.5M2.02
    15 January 20212.5M-9.1%1.7M1.45
    31 December 20202.8M+17.2%1.2M2.25
    15 December 20202.4M-5.8%1.6M1.45
    30 November 20202.5M+7.6%1.9M1.29
    13 November 20202.3M-2.6%2.0M1.19
    30 October 20202.4M+7.7%1.3M1.89
    15 October 20202.2M-6.8%941K2.35
    30 September 20202.4M-22.9%1.1M2.11
    15 September 20203.1M+21.4%1.4M2.15
    31 August 20202.5M-3.3%1.1M2.28
    14 August 20202.6M-14.0%980K2.68
    31 July 20203.1M-2.2%1.3M2.44
    15 July 20203.1M+3.9%1.1M2.77
    30 June 20203.0M-18.1%1.4M2.21
    15 June 20203.7M+6.3%1.3M2.88
    29 May 20203.4M-1.9%1.2M2.85
    15 May 20203.5M+5.1%1.3M2.70
    30 April 20203.3M-4.6%1.9M1.76
    15 April 20203.5M-7.5%1.7M2.06
    31 March 20203.8M-16.3%3.1M1.22
    13 March 20204.5M+9.7%2.6M1.73
    28 February 20204.1M+7.0%2.1M1.97
    14 February 20203.9M+40.5%1.7M2.29
    31 January 20202.7M-22.8%1.3M2.10
    15 January 20203.6M+0.2%899K3.95
    31 December 20193.5M+1.4%1.1M3.18
    13 December 20193.5M-1.9%967K3.62
    29 November 20193.6M+4.5%1.3M2.74
    15 November 20193.4M+3.4%1.1M3.06
    31 October 20193.3M-15.9%1.4M2.42
    15 October 20193.9M+16.1%1.8M2.22
    30 September 20193.4M-9.5%1.4M2.37
    13 September 20193.7M+24.3%1.6M2.37
    30 August 20193.0M+7.0%1.3M2.38
    15 August 20192.8M+0.7%1.7M1.63
    31 July 20192.8M-2.8%1.5M1.83
    15 July 20192.9M+9.5%1.2M2.48
    28 June 20192.6M-2.2%1.6M1.61
    14 June 20192.7M-4.3%1.4M1.85
    31 May 20192.8M-13.6%1.4M2.07
    15 May 20193.2M+9.8%1.5M2.10
    30 April 20193.0M-1.2%2.4M1.22
    15 April 20193.0M-8.4%1.2M2.57
    29 March 20193.3M+15.4%1.4M2.36
    15 March 20192.8M-0.8%1.6M1.73
    28 February 20192.8M-13.1%1.3M2.20
    15 February 20193.3M+14.9%1.2M2.66
    31 January 20192.9M-22.9%2.0M1.39
    15 January 20193.7M+0.7%2.5M1.49
    31 December 20183.7M-8.2%2.2M1.64
    14 December 20184.0M+7.9%1.8M2.28
    30 November 20183.7M-7.3%1.6M2.29
    15 November 20184.0M+13.5%1.4M2.77
    31 October 20183.5M+1.4%2.4M1.46
    15 October 20183.5M-4.4%1.6M2.15
    28 September 20183.6M+3.2%1.3M2.87
    14 September 20183.5M-4.0%1.2M3.02
    31 August 20183.7M-9.2%928K3.96
    15 August 20184.1M+7.5%1.1M3.58
    31 July 20183.8M+47.0%2.0M1.89
    13 July 20182.6M+4.2%1.0M2.52
    29 June 20182.5M-1.8%1.4M1.75
    15 June 20182.5M-22.5%1.2M2.02
    31 May 20183.2M-24.5%1.3M2.41
    15 May 20184.3M-11.3%1.4M3.12
    30 April 20184.8M+9.4%1.5M3.11
    13 April 20184.4M+15.9%1.3M3.39
    29 March 20183.8M-4.3%1.6M2.39
    15 March 20184.0M+13.9%1.4M2.92
    28 February 20183.5M-8.1%1.0M3.38
    15 February 20183.8M-11.5%1.8M2.10
    31 January 20184.3M-8.6%1.6M2.64
    12 January 20184.7M-5.9%1.5M3.05
    29 December 20175.0M1.0M4.83
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.