Does Marshall Wace own TMO stock?

Yes. As of its Q2 2026 13F, Marshall Wace holds 4,321 shares of TMO (Thermo Fisher Scientific), worth $2.2M.

How many shares of TMO does Marshall Wace own?

As of its Q2 2026 13F, Marshall Wace holds 4,321 shares of TMO (Thermo Fisher Scientific).

As of its Q2 2026 13F, Marshall Wace's TMO position is worth $2.2M.

In Q2 2026, Marshall Wace reduced its TMO position by 472,929 shares (-99.1%).

Marshall Wace already held TMO in its Q4 2018 13F, the earliest on record, and has listed it in 28 quarterly 13F filings.

Position history for MWMARSHALL WACE, LLP's holdings in Thermo Fisher Scientific Inc.

Current Value

$2.2M

Current Shares

4,321

Total Value Change

-$35.4M

Total Shares Change

-163,537

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	4,321	-99.1%	$2.2M	0.0%	$500.98	0
2026-Q1	Decreased	477,250	-50.0%	$234.6M	0.2%	$490.66	0
2025-Q4	Increased	953,828	+88.7%	$552.7M	0.5%	$577.86	69
2025-Q3	Increased	505,463	+36.0%	$245.2M	0.2%	$483.32	48
2025-Q2	New	371,630	-	$150.7M	0.2%	$403.68	50
2025-Q1	Exited	0	-100.0%	$0	0.0%	$494.90	0
2024-Q4	Decreased	330,321	-47.4%	$171.8M	0.2%	$516.97	0
2024-Q3	Increased	627,733	+896x	$388.3M	0.5%	$614.24	60
2024-Q2	Decreased	700	-71.8%	$387,100	0.0%	$548.78	0
2024-Q1	Decreased	2,481	-99.4%	$1.4M	0.0%	$576.38	0
2023-Q4	New	422,576	-	$224.3M	0.4%	$526.03	51
2023-Q2	Exited	0	-100.0%	$0	0.0%	$516.37	0
2023-Q1	Decreased	30,479	-92.4%	$17.6M	0.0%	$570.05	0
2022-Q4	Decreased	400,574	-13.4%	$220.6M	0.5%	$544.30	0
2022-Q3	Decreased	462,816	-35.6%	$234.7M	0.5%	$501.04	0
2022-Q2	Increased	718,514	+124.3%	$390.4M	0.8%	$536.40	71
2022-Q1	Decreased	320,288	-69.3%	$189.2M	0.4%	$582.83	0
2021-Q4	Increased	1M	+158.5%	$696.5M	1.3%	$658.04	80
2021-Q3	Decreased	403,753	-19.3%	$230.7M	1.0%	$563.23	0
2021-Q2	Increased	500,167	+13.6%	$252.3M	1.1%	$497.08	55
2021-Q1	Decreased	440,115	-49.3%	$200.9M	0.9%	$449.45	0
2020-Q4	Increased	867,394	+67.0%	$404M	2.2%	$458.44	79
2020-Q3	Decreased	519,420	-9.9%	$229.3M	1.5%	$434.36	0
2020-Q2	Decreased	576,678	-4.5%	$209M	1.5%	$356.28	0
2020-Q1	Decreased	603,707	-34.2%	$171.2M	1.7%	$278.68	0
2019-Q4	Decreased	917,202	-20.3%	$298M	2.0%	$318.98	0
2019-Q3	Increased	1.2M	+6.5%	$335.3M	2.6%	$285.82	57
2019-Q2	Increased	1.1M	+39.5%	$317.5M	2.6%	$288.00	70
2019-Q1	Increased	775,103	+361.8%	$212.2M	2.0%	$268.25	78
2018-Q4	First report	167,858	-	$37.6M	0.4%	$219.16	0