Merrimack Pharmaceuticals (MACK) Institutional Ownership

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Current Institutional Ownership Percentage: 63.97%
Number of Institutional Buyers (last 12 months): 32
Total Institutional Inflows (last 12 months): $29.67M

Number of Institutional Sellers (last 12 months): 8
Total Institutional Outflows (last 12 months): $1.84M

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MACK Institutional Buying and Selling by Quarter

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Merrimack Pharmaceuticals Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
3/11/2024	Vanguard Group Inc.	608,954	$8.17M	0.0%	+1.4%	4.194%
2/15/2024	Barclays PLC	14,380	$193K	0.0%	+679.4%	0.100%
2/15/2024	Vanguard Group Inc.	608,954	$8.17M	0.0%	+1.4%	4.252%
2/14/2024	ADAR1 Capital Management LLC	549,418	$7.37M	2.6%	N/A	3.837%
2/13/2024	Northern Trust Corp	116,909	$1.57M	0.0%	+1.3%	0.816%
2/9/2024	UBS Group AG	13,217	$177K	0.0%	+126.0%	0.092%
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2/7/2024	Dimensional Fund Advisors LP	435,645	$5.84M	0.0%	-2.9%	3.042%
2/7/2024	BNP Paribas Financial Markets	3,034	$41K	0.0%	+97.1%	0.021%
1/30/2024	Strs Ohio	3,300	$44K	0.0%	N/A	0.023%
1/25/2024	Allspring Global Investments Holdings LLC	11,827	$159K	0.0%	N/A	0.083%
12/18/2023	Vanguard Group Inc.	600,344	$7.40M	0.0%	+7.8%	4.192%
11/15/2023	Kennedy Capital Management LLC	93,708	$1.16M	0.0%	+2.4%	0.654%
11/14/2023	California State Teachers Retirement System	2,310	$28K	0.0%	-33.7%	0.016%
11/14/2023	Wittenberg Investment Management Inc.	209,739	$2.59M	0.9%	+2.3%	1.465%
11/13/2023	FMR LLC	9,326	$115K	0.0%	+2,675.6%	0.065%
11/9/2023	Rhumbline Advisers	13,879	$171K	0.0%	+10.4%	0.097%
11/8/2023	Sepio Capital LP	306,680	$3.78M	0.3%	+4.1%	2.142%
8/21/2023	California State Teachers Retirement System	3,483	$43K	0.0%	N/A	0.024%
8/15/2023	Wells Fargo & Company MN	4,446	$55K	0.0%	+2,515.3%	0.031%
8/15/2023	Goldman Sachs Group Inc.	14,142	$174K	0.0%	-59.5%	0.099%
8/15/2023	Lazard Asset Management LLC	3,123	$38K	0.0%	-36.9%	0.022%
8/15/2023	Kennedy Capital Management LLC	91,506	$1.13M	0.0%	+565.1%	0.639%
8/15/2023	Boothbay Fund Management LLC	46,437	$571K	0.0%	-60.5%	0.324%
8/14/2023	Tower Research Capital LLC TRC	10,567	$130K	0.0%	+755.6%	0.074%
8/14/2023	Marshall Wace LLP	87,037	$1.07M	0.0%	-11.4%	0.608%
8/14/2023	State Street Corp	174,105	$2.14M	0.0%	+244.4%	1.216%
8/14/2023	Nuveen Asset Management LLC	13,719	$169K	0.0%	N/A	0.096%
8/11/2023	BlackRock Inc.	676,290	$8.32M	0.0%	+204.3%	4.723%
8/11/2023	Geode Capital Management LLC	243,802	$3.00M	0.0%	+87.3%	1.703%
8/11/2023	JPMorgan Chase & Co.	8,344	$103K	0.0%	N/A	0.058%
8/11/2023	Wittenberg Investment Management Inc.	204,994	$2.52M	0.9%	+3.5%	1.432%
8/11/2023	Northern Trust Corp	115,992	$1.43M	0.0%	+315.0%	0.810%
8/10/2023	MetLife Investment Management LLC	5,610	$69K	0.0%	N/A	0.039%
8/10/2023	Charles Schwab Investment Management Inc.	29,628	$364K	0.0%	N/A	0.207%
8/10/2023	Citigroup Inc.	3,117	$38K	0.0%	N/A	0.022%
8/9/2023	Dimensional Fund Advisors LP	459,960	$5.66M	0.0%	-1.3%	3.212%
8/9/2023	BNP Paribas Arbitrage SNC	2,726	$34K	0.0%	N/A	0.019%
8/4/2023	American International Group Inc.	5,039	$62K	0.0%	N/A	0.035%
8/3/2023	Fifth Lane Capital LP	10,929	$134K	0.0%	N/A	0.077%
8/3/2023	Bank of New York Mellon Corp	100,317	$1.23M	0.0%	+34.0%	0.703%
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5/16/2023	Jane Street Group LLC	37,307	$459K	0.0%	N/A	0.262%
5/16/2023	State Street Corp	50,556	$621K	0.0%	+3.5%	0.355%
5/16/2023	Geode Capital Management LLC	130,164	$1.60M	0.0%	-3.0%	0.913%
5/15/2023	Wittenberg Investment Management Inc.	197,994	$2.43M	0.9%	+3.6%	1.388%
5/15/2023	Boothbay Fund Management LLC	117,436	$1.44M	0.0%	+82.9%	0.824%
5/15/2023	Madison Avenue Partners LP	553,085	$6.80M	1.5%	N/A	3.879%
5/15/2023	Sio Capital Management LLC	272,843	$3.35M	1.7%	+9.1%	1.913%
5/12/2023	BlackRock Inc.	222,253	$2.73M	0.0%	+6.0%	1.559%
5/12/2023	UBS Group AG	3,128	$38K	0.0%	+303.6%	0.022%
5/12/2023	Yakira Capital Management Inc.	72,118	$886K	0.2%	-15.9%	0.506%
5/12/2023	Dimensional Fund Advisors LP	466,140	$5.73M	0.0%	-1.1%	3.269%
5/4/2023	Barclays PLC	5,438	$67K	0.0%	+3,928.1%	0.038%
2/15/2023	Western Standard LLC	1,529,494	$17.53M	15.4%	+30.5%	11.406%
2/15/2023	Millennium Management LLC	16,985	$195K	0.0%	N/A	0.127%
2/15/2023	Morgan Stanley	9,163	$105K	0.0%	+40.7%	0.068%
2/15/2023	Boothbay Fund Management LLC	64,211	$736K	0.0%	N/A	0.479%
2/15/2023	Nantahala Capital Management LLC	210,000	$2.41M	0.2%	-51.1%	1.566%
2/14/2023	Two Sigma Investments LP	42,490	$487K	0.0%	+97.5%	0.317%
2/13/2023	Geode Capital Management LLC	134,226	$1.54M	0.0%	+33.2%	1.001%
2/10/2023	22NW LP	1,015,048	$11.63M	6.3%	-17.5%	7.569%
2/10/2023	Yakira Capital Management Inc.	85,732	$982K	0.2%	-26.0%	0.639%
2/9/2023	Dimensional Fund Advisors LP	471,373	$5.40M	0.0%	-0.2%	3.515%
2/6/2023	Wittenberg Investment Management Inc.	191,194	$2.19M	0.9%	+1.3%	1.426%
11/15/2022	Two Sigma Investments LP	21,519	$81K	0.0%	-13.6%	0.160%
11/15/2022	BlackRock Inc.	206,783	$775K	0.0%	-0.4%	1.542%
11/14/2022	Point72 Asset Management L.P.	1,100,994	$4.13M	0.0%	+228.5%	8.210%
11/10/2022	Nantahala Capital Management LLC	429,596	$1.61M	0.1%	-12.6%	3.204%
11/10/2022	Dimensional Fund Advisors LP	472,301	$1.77M	0.0%	-0.9%	3.522%
10/28/2022	Sepio Capital LP	294,545	$1.11M	0.1%	-6.9%	2.196%
8/18/2022	Goldman Sachs Group Inc.	14,142	$84K	0.0%	N/A	0.105%
8/16/2022	Western Standard LLC	1,269,558	$7.55M	5.7%	+8.3%	9.467%
8/15/2022	Nantahala Capital Management LLC	491,509	$2.92M	0.1%	-4.9%	3.665%
8/15/2022	Point72 Asset Management L.P.	335,108	$1.99M	0.0%	-1.9%	2.499%
8/11/2022	Yakira Capital Management Inc.	115,821	$689K	0.1%	+30.6%	0.864%
7/26/2022	Sepio Capital LP	316,313	$1.88M	0.2%	+6.7%	2.359%
5/13/2022	Nantahala Capital Management LLC	516,817	$3.27M	0.1%	-9.3%	3.854%
5/13/2022	Vanguard Group Inc.	608,204	$3.85M	0.0%	-1.4%	4.535%
5/13/2022	Bronte Capital Management Pty Ltd.	578,313	$3.66M	0.3%	+7.6%	4.313%
5/13/2022	Dimensional Fund Advisors LP	482,484	$3.05M	0.0%	-1.3%	3.598%
5/12/2022	Yakira Capital Management Inc.	88,683	$561K	0.1%	+20.7%	0.661%
5/9/2022	Sepio Capital LP	296,546	$1.88M	0.2%	+276.2%	2.211%
2/16/2022	Western Standard LLC	1,172,463	$4.58M	2.7%	-7.6%	8.743%
2/10/2022	Bronte Capital Management Pty Ltd.	537,584	$2.10M	0.1%	-2.1%	4.009%
2/9/2022	Dimensional Fund Advisors LP	488,687	$1.91M	0.0%	-2.1%	3.644%
2/9/2022	Yakira Capital Management Inc.	73,450	$287K	0.0%	+21.1%	0.548%
1/20/2022	Radnor Capital Management LLC	13,332	$52K	0.0%	N/A	0.099%
11/15/2021	Point72 Asset Management L.P.	341,685	$1.65M	0.0%	+63.0%	2.548%
11/15/2021	Dimensional Fund Advisors LP	499,368	$2.41M	0.0%	-3.5%	3.724%
11/9/2021	BlackRock Inc.	211,051	$1.02M	0.0%	+12.8%	1.574%
11/3/2021	Sepio Capital LP	78,829	$381K	0.0%	-64.4%	0.588%
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8/25/2021	Marshall Wace LLP	39,150	$250K	0.0%	-57.3%	0.292%
8/17/2021	Bridgeway Capital Management LLC	59,200	$378K	0.0%	-7.8%	0.441%
8/16/2021	Point72 Asset Management L.P.	209,563	$1.34M	0.0%	N/A	1.563%
8/16/2021	Nantahala Capital Management LLC	571,946	$3.66M	0.1%	-6.1%	4.265%
8/16/2021	State Street Corp	46,556	$297K	0.0%	+316.2%	0.347%
8/16/2021	Western Standard LLC	1,269,558	$8.11M	4.8%	+25.5%	9.467%
8/16/2021	Marshall Wace LLP	39,150	$250K	0.0%	-57.3%	0.292%
8/13/2021	Renaissance Technologies LLC	101,970	$652K	0.0%	-45.8%	0.760%
8/13/2021	Northern Trust Corp	31,678	$203K	0.0%	-12.5%	0.236%
8/13/2021	Geode Capital Management LLC	96,692	$617K	0.0%	+6.0%	0.721%

(Data available from 1/1/2016 forward)

MACK Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of MACK shares?: During the previous two years, 45 institutional investors and hedge funds held shares of Merrimack Pharmaceuticals. The most heavily invested institutionals were Western Standard LLC ($17.53M), 22NW LP ($11.63M), BlackRock Inc. ($8.32M), Vanguard Group Inc. ($8.17M), ADAR1 Capital Management LLC ($7.37M), Madison Avenue Partners LP ($6.80M), and Dimensional Fund Advisors LP ($5.84M).Learn more on MACK's institutional investors.
What percentage of Merrimack Pharmaceuticals stock is owned by institutional investors?: 63.97% of Merrimack Pharmaceuticals stock is owned by institutional investors. Learn more on MACK's institutional investor holdings.
Which institutional investors have been buying Merrimack Pharmaceuticals stock?: Of the 40 institutional investors that purchased Merrimack Pharmaceuticals stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Point72 Asset Management L.P. ($765.89K), Madison Avenue Partners LP ($553.09K), ADAR1 Capital Management LLC ($549.42K), BlackRock Inc. ($466.53K), Western Standard LLC ($454.13K), Sepio Capital LP ($249.62K), and Geode Capital Management LLC ($147.06K).

How much institutional buying is happening at Merrimack Pharmaceuticals?: Institutional investors have bought a total of 4,053,874 shares in the last 24 months. This purchase volume represents approximately $40.92M in transactions.
Which Merrimack Pharmaceuticals major shareholders have been selling company stock?: Of the 15 institutional investors that sold Merrimack Pharmaceuticals stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Nantahala Capital Management LLC ($359.97K), 22NW LP ($215.97K), Boothbay Fund Management LLC ($71.00K), Yakira Capital Management Inc. ($43.70K), Dimensional Fund Advisors LP ($36.06K), Sepio Capital LP ($21.77K), and Goldman Sachs Group Inc. ($20.76K).
How much institutional selling is happening at Merrimack Pharmaceuticals?: Institutional investors have sold a total of 807,055 shares in the last 24 months. This volume of shares sold represents approximately $8.15M in transactions.

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This page (NASDAQ:MACK) was last updated on 4/16/2024 by MarketBeat.com Staff

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Merrimack Pharmaceuticals (MACK) Institutional Ownership

MACK Institutional Buying and Selling by Quarter

Merrimack Pharmaceuticals Major Shareholders & Ownership History

MACK Institutional Ownership - Frequently Asked Questions

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Merrimack Pharmaceuticals (MACK) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Merrimack Pharmaceuticals (NASDAQ:MACK)

MACK Institutional Buying and Selling by Quarter

Merrimack Pharmaceuticals Major Shareholders & Ownership History

MACK Institutional Ownership - Frequently Asked Questions