Thermo Fisher Scientific Inc.
CL ˙ SNSE ˙ US8835561023
SecurityCL:TMOCL / Thermo Fisher Scientific Inc.
InstitutionMaven Securities LTD
Latest Disclosed Ownership24,800 shares
Latest Disclosed Value $ 12,202,840
Maven Securities LTD ownership in TMOCL / Thermo Fisher Scientific Inc.

On May 15, 2026 - Maven Securities LTD filed a 13F-HR form disclosing ownership of 24,800 shares of Thermo Fisher Scientific Inc. (CL:TMOCL) valued at $12,202,840 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 14, 2025 disclosing 0 shares of Thermo Fisher Scientific Inc..

Maven Securities LTD has a history of taking positions in derivatives of the underlying security (TMOCL) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CL:TMOCL / Thermo Fisher Scientific Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC INC CALL 883556902 24,800 24,800 12,203 0.2235
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -1,322 -100.00 0 -100.00
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,322 8 0.61 688 -15.39 0.0167
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,314 1,314 813 0.0157
2024-08-29 2024-06-30 13F/A-1 THERMO FISHER SCIENTIFIC COM 883556102 0 -349 -100.00 0 -100.00
2024-08-13 2024-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 0 0
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 349 349 203 0.0119
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -605 -100.00 0 -100.00
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 605 -506 -45.54 306 -47.15 0.0035
2023-08-04 2023-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 1,111 1,111 580 0.0087
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -1,878 -100.00 0 -100.00
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,878 1,878 1,109 0.0386
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -4,002 -100.00 0 -100.00
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC COM 883556102 4,002 -2,840 -41.51 2,286 -33.78 0.0738
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC COM 883556102 6,842 6,842 3,452 0.1391
2021-05-17 2021-03-31 13F THERMO FISHER SCIENTIFIC COM 883556102 0 -1,356 -100.00 0 -100.00
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC COM 883556102 1,356 1,356 632 0.0625
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-13 2025-12-31 13F THERMO FISHER SCIENTIFIC CALL Call 16,500 9,560 n/a n/a n/a
2025-11-20 2025-09-30 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC CALL Call 2,500 1,014 n/a n/a n/a
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC CALL Call 4,100 -51.19 2,133 -58.96 n/a n/a n/a
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC CALL Call 8,400 2.44 5,196 14.58 n/a n/a n/a
2024-08-29 2024-06-30 13F/A THERMO FISHER SCIENTIFIC CALL Call 8,200 4,535 n/a n/a n/a
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC CALL Call 5,700 -63.46 3,026 -61.69 n/a n/a n/a
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC CALL Call 15,600 212.00 7,896 202.64 n/a n/a n/a
2023-08-04 2023-06-30 13F THERMO FISHER SCIENTIFIC CALL Call 5,000 455.56 2,609 403.67 n/a n/a n/a
2023-05-15 2023-03-31 13F THERMO FISHER SCIENTIFIC CALL Call 900 519 n/a n/a n/a
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC CALL Call 1,400 800 n/a n/a n/a
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F THERMO FISHER SCIENTIFIC CALL Call 2,000 649 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-20 2025-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F THERMO FISHER SCIENTIFIC PUT Put 2,300 27.78 933 4.13 n/a n/a n/a
2025-05-14 2025-03-31 13F THERMO FISHER SCIENTIFIC PUT Put 1,800 5.88 896 1.24 n/a n/a n/a
2025-02-14 2024-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 1,700 -45.16 884 -53.89 n/a n/a n/a
2024-11-14 2024-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 3,100 29.17 1,918 44.46 n/a n/a n/a
2024-08-29 2024-06-30 13F/A THERMO FISHER SCIENTIFIC PUT Put 2,400 1,327 n/a n/a n/a
2024-05-14 2024-03-31 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-12 2023-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 700 -85.71 372 -85.04 n/a n/a n/a
2023-11-13 2023-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 4,900 81.48 2,480 76.01 n/a n/a n/a
2023-08-04 2023-06-30 13F THERMO FISHER SCIENTIFIC PUT Put 2,700 1,409 n/a n/a n/a
2023-02-14 2022-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-16 2022-09-30 13F/A THERMO FISHER SCIENTIFIC PUT Put 400 203 n/a n/a n/a
2022-11-14 2022-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 400 2,029 n/a n/a n/a
2022-08-15 2022-06-30 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F THERMO FISHER SCIENTIFIC PUT Put 6,100 3,603 n/a n/a n/a
2022-02-14 2021-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 13,000 54.76 7,427 75.25 n/a n/a n/a
2021-08-16 2021-06-30 13F THERMO FISHER SCIENTIFIC PUT Put 8,400 4,238 n/a n/a n/a
2021-02-12 2020-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-13 2020-09-30 13F THERMO FISHER SCIENTIFIC PUT Put 1,600 14.29 707 39.45 n/a n/a n/a
2020-08-14 2020-06-30 13F THERMO FISHER SCIENTIFIC PUT Put 1,400 -12.50 507 -28.29 n/a n/a n/a
2020-05-15 2020-03-31 13F THERMO FISHER SCIENTIFIC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F THERMO FISHER SCIENTIFIC PUT Put 4,700 1,526 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.