MACK Insider Trading

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Insider Trading History
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About

Insider Ownership Percentage: 28.87%

Insider Buying (Last 12 Months): $4,220,077.40

Insider Selling (Last 12 Months): $0.00

Merrimack Pharmaceuticals Insider Trading History Chart

Merrimack Pharmaceuticals Share Price & Price History

^$14.72

▲ +0.04 (0.27%)

As of 04/19/2024 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
12/28/2023	Eric Andersen	Director	Buy	857	$13.35	$11,440.95	534,008
12/26/2023	Eric Andersen	Director	Buy	48,693	$13.15	$640,312.95	533,151
12/7/2023	Eric Andersen	Director	Buy	101,050	$12.85	$1,298,492.50	1,735,600
11/17/2023	Eric Andersen	Director	Buy	300	$12.50	$3,750.00	1,659,216
11/14/2023	Eric Andersen	Director	Buy	50,170	$12.50	$627,125.00	1,658,981
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

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

63.97% 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
3/11/2024	Vanguard Group Inc.	608,954	$8.17M	0.0%	+1.4%	4.194%
2/15/2024	Barclays PLC	14,380	$0.19M	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	$0.18M	0.0%	+126.0%	0.092%
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	$0.16M	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	$0.12M	0.0%	+2,675.6%	0.065%
11/9/2023	Rhumbline Advisers	13,879	$0.17M	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	$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%

Data available starting January 2016

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

Today's Range

Now: $14.72

$14.68

$14.73

50 Day Range

MA: $14.68

$13.80

$15.00

52 Week Range

Now: $14.72

$11.53

$15.89

Volume

76,084 shs

Average Volume

111,833 shs

Market Capitalization

$213.88 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.43

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)
Learn More about top insider investors at Merrimack Pharmaceuticals.