MACK Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 28.87%

Insider Buying (Last 12 Months): $5,259,007.36

Insider Selling (Last 12 Months): $0.00

Merrimack Pharmaceuticals Insider Trading History Chart

Merrimack Pharmaceuticals Share Price & Price History

^$12.24

▲ +0.02 (0.16%)

As of 09/22/2023 01:00 AM ET

Days: 30 | 90 | 365

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Merrimack Pharmaceuticals Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
8/10/2023	Gary L. Crocker	Insider	Buy	2,000	$12.52	$25,040.00	133,105
8/7/2023	Eric Andersen	Director	Buy	134,493	$12.00	$1,613,916.00	1,496,680
3/21/2023	Eric Andersen	Director	Buy	160,590	$11.52	$1,849,996.80	1,412,044
1/30/2023	Eric Andersen	Director	Buy	24,708	$11.36	$280,682.88	1,282,853
1/27/2023	Eric Andersen	Director	Buy	21,875	$11.40	$249,375.00	1,263,103
1/12/2023	Noah G. Levy	Director	Buy	100,000	$11.90	$1,190,000.00	1,119,586
1/6/2023	Ana Radeljevic	Director	Buy	4,156	$12.03	$49,996.68	4,156
7/13/2022	Noah G. Levy	Director	Buy	3,095	$5.89	$18,229.55	754,108
7/11/2022	Noah G. Levy	Director	Buy	700	$5.97	$4,179.00	748,197
7/7/2022	Noah G. Levy	Director	Buy	1,100	$5.99	$6,589.00	746,119
6/30/2022	Noah G. Levy	Director	Buy	1,550	$5.76	$8,928.00	745,019
6/23/2022	Noah G. Levy	Director	Buy	500	$6.00	$3,000.00	742,469
6/16/2022	Noah G. Levy	Director	Buy	520	$5.45	$2,834.00	1,012,471
6/14/2022	Noah G. Levy	Director	Buy	20,938	$5.17	$108,249.46	1,010,515
6/9/2022	Gary L. Crocker	Insider	Buy	4,452	$5.15	$22,927.80	131,105
6/7/2022	Gary L. Crocker	Insider	Buy	300	$5.05	$1,515.00	126,304
5/24/2022	Gary L. Crocker	Insider	Buy	2,323	$5.09	$11,824.07	125,872
4/21/2022	Gary L. Crocker	Insider	Buy	5,000	$6.00	$30,000.00	115,338
3/30/2022	Gary L. Crocker	Insider	Buy	161	$6.20	$998.20
3/28/2022	Gary L. Crocker	Insider	Buy	5,000	$6.16	$30,800.00
3/22/2022	Gary L. Crocker	Insider	Buy	400	$6.11	$2,444.00
3/14/2022	Gary L. Crocker	Insider	Buy	5,000	$6.02	$30,100.00
3/11/2022	Gary L. Crocker	Insider	Buy	5,000	$6.08	$30,400.00
1/31/2022	Noah G. Levy	Director	Buy	1,237	$5.05	$6,246.85
1/28/2022	Noah G. Levy	Director	Buy	12,963	$4.48	$58,074.24
1/26/2022	Gary L. Crocker	Insider	Buy	3,100	$4.56	$14,136.00
1/26/2022	Noah G. Levy	Director	Buy	19,528	$5.01	$97,835.28
1/24/2022	Gary L. Crocker	Insider	Buy	7,105	$4.33	$30,764.65
1/24/2022	Ulrik B. Nielsen	Director	Buy	14,287	$4.24	$60,576.88
1/21/2022	Gary L. Crocker	Insider	Buy	2,000	$4.65	$9,300.00
1/18/2022	Gary L. Crocker	Insider	Buy	5,000	$4.54	$22,700.00
1/13/2022	Gary L. Crocker	Insider	Buy	5,000	$4.42	$22,100.00
1/11/2022	Gary L. Crocker	Insider	Buy	5,000	$4.03	$20,150.00
1/10/2022	Noah G. Levy	Director	Buy	14,679	$3.83	$56,220.57
4/14/2021	Eric Andersen	Director	Buy	47,300	$6.63	$313,599.00
4/12/2021	Eric Andersen	Director	Buy	23,629	$6.06	$143,191.74
4/12/2021	Gary L. Crocker	Insider	Buy	973	$6.07	$5,906.11
4/9/2021	Gary L. Crocker	Insider	Buy	1,200	$6.10	$7,320.00
4/7/2021	Gary L. Crocker	Insider	Buy	2,127	$6.19	$13,166.13
3/25/2021	Gary L. Crocker	Insider	Buy	200	$6.13	$1,226.00
3/23/2021	Gary L. Crocker	Insider	Buy	3,627	$6.47	$23,466.69
2/10/2021	Gary L. Crocker	Insider	Buy	3,500	$7.64	$26,740.00
11/24/2020	Noah G. Levy	Director	Buy	69,087	$3.65	$252,167.55

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

55.90% of Merrimack Pharmaceuticals stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Merrimack Pharmaceuticals Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
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	$0.17M	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	$0.57M	0.0%	-60.5%	0.324%
8/14/2023	Tower Research Capital LLC TRC	10,567	$0.13M	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	$0.17M	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	$3M	0.0%	+87.3%	1.703%
8/11/2023	JPMorgan Chase & Co.	8,344	$0.10M	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	$0.36M	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	$0.13M	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%
5/16/2023	Jane Street Group LLC	37,307	$0.46M	0.0%	N/A	0.262%
5/16/2023	State Street Corp	50,556	$0.62M	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	$0.89M	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	$0.20M	0.0%	N/A	0.127%
2/15/2023	Morgan Stanley	9,163	$0.11M	0.0%	+40.7%	0.068%
2/15/2023	Boothbay Fund Management LLC	64,211	$0.74M	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	$0.49M	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	$0.98M	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	$0.78M	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	$0.69M	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	$0.56M	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	$0.29M	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	$0.38M	0.0%	-64.4%	0.588%
8/25/2021	Marshall Wace LLP	39,150	$0.25M	0.0%	-57.3%	0.292%
8/17/2021	Bridgeway Capital Management LLC	59,200	$0.38M	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	$0.30M	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	$0.25M	0.0%	-57.3%	0.292%
8/13/2021	Renaissance Technologies LLC	101,970	$0.65M	0.0%	-45.8%	0.760%
8/13/2021	Northern Trust Corp	31,678	$0.20M	0.0%	-12.5%	0.236%
8/13/2021	Geode Capital Management LLC	96,692	$0.62M	0.0%	+6.0%	0.721%
8/12/2021	Wittenberg Investment Management Inc.	189,294	$1.21M	0.5%	+1.7%	1.412%
5/18/2021	Millennium Management LLC	12,292	$77K	0.0%	N/A	0.092%
5/17/2021	Price T Rowe Associates Inc. MD	10,500	$66K	0.0%	N/A	0.078%
5/14/2021	Nantahala Capital Management LLC	608,974	$3.82M	0.1%	-19.0%	4.541%
5/14/2021	Dimensional Fund Advisors LP	519,220	$3.26M	0.0%	-5.7%	3.872%
5/13/2021	Renaissance Technologies LLC	188,161	$1.18M	0.0%	+6.4%	1.403%
5/13/2021	Bank of New York Mellon Corp	42,225	$0.27M	0.0%	+140.7%	0.315%
5/12/2021	Geode Capital Management LLC	91,208	$0.57M	0.0%	+9.3%	0.680%
5/10/2021	Sepio Capital LP	218,907	$1.38M	0.1%	+13.1%	1.632%
5/7/2021	BlackRock Inc.	255,503	$1.61M	0.0%	+1.4%	1.905%
4/26/2021	Mascoma Wealth Management LLC	5,000	$31K	0.0%	N/A	0.037%
4/13/2021	Bronte Capital Management Pty Ltd.	550,679	$3.46M	0.4%	+3.6%	4.106%
3/8/2021	Dimensional Fund Advisors LP	550,539	$3.79M	0.0%	-2.9%	4.115%
2/25/2021	Dimensional Fund Advisors LP	550,539	$3.79M	0.0%	-2.9%	4.115%
2/10/2021	Renaissance Technologies LLC	176,861	$1.22M	0.0%	N/A	1.322%
12/16/2020	Bronte Capital Management Pty Ltd.	531,510	$2.05M	0.4%	N/A	3.972%
11/17/2020	Nantahala Capital Management LLC	751,943	$3.01M	0.1%	+0.6%	5.620%

Data available starting January 2016

Merrimack Pharmaceuticals, Inc. operates as a biopharmaceutical company. The company was incorporated in 1993 and is headquartered in Cambridge, Massachusetts.

Today's Range

Now: $12.24

$12.14

$12.40

50 Day Range

MA: $12.12

$11.60

$12.49

52 Week Range

Now: $12.24

$3.00

$13.66

Volume

26,137 shs

Average Volume

34,931 shs

Market Capitalization

$175.28 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.76

Who are the company insiders with the largest holdings of Merrimack Pharmaceuticals?: Merrimack Pharmaceuticals' top insider shareholders include:
Eric Andersen (Director)
Noah G Levy (Director)
Gary L Crocker (Insider)
Ana Radeljevic (Director)
Ulrik B Nielsen (Director)
Learn More about top insider investors at Merrimack Pharmaceuticals.
Who are the major institutional investors of Merrimack Pharmaceuticals?: Merrimack Pharmaceuticals' top institutional investors include:
BlackRock Inc. — 4.72%
Dimensional Fund Advisors LP — 3.21%
Geode Capital Management LLC — 1.70%
Wittenberg Investment Management Inc. — 1.43%
State Street Corp — 1.22%
Northern Trust Corp — 0.81%
Learn More about top institutional investors of Merrimack Pharmaceuticals stock.
Which institutional investors are selling Merrimack Pharmaceuticals stock?: During the last quarter, MACK stock was sold by these institutional investors:
Boothbay Fund Management LLC
Goldman Sachs Group Inc.
Citadel Advisors LLC
Belvedere Trading LLC
Marshall Wace LLP
Dimensional Fund Advisors LP
Lazard Asset Management LLC
Which institutional investors are buying Merrimack Pharmaceuticals stock?: Within the last quarter, MACK stock was bought by institutional investors including:
BlackRock Inc.
State Street Corp
Geode Capital Management LLC
Northern Trust Corp
Kennedy Capital Management LLC
Charles Schwab Investment Management Inc.
Bank of New York Mellon Corp
Nuveen Asset Management LLC
During the previous year, these company insiders have bought Merrimack Pharmaceuticals stock:
Eric Andersen (Director)
Noah G Levy (Director)
Gary L Crocker (Insider)
Ana Radeljevic (Director)
Ulrik B Nielsen (Director)
Learn More investors buying Merrimack Pharmaceuticals stock.