Third Rock Ventures, LLC

High-turnover traderConcentrated strategyContrarian

Total reported value

$1.1B

Reporting period: 2015-09-30 · Number of holdings: 5

Third Rock Ventures, LLC disclosed 5 holdings in its latest 13F filing for the period ending 2015-09-30, with total reported value of $1.1B and a quarterly turnover rate of 100.0%.

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Personality snowflake

Concentration: 100
Portfolio Stability: 100
Momentum/Contrarian: 0
Sector conviction: 0
Diversification: 10
Sizing Uniformity: 88.16

Recent moves

Trim SG7
-26.6%　-$367.8M
Trim ZFGNUSD
-93.4%　-$104.2M
Trim 2655787D
0.0%　-$38.1M
Trim 286221106
0.0%　-$2.0M
New buy GBTUSD

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#	Ticker	Issuer	Asset Subclass	Weight	Weight Change	Shares Change
1	GBTUSD	Global Blood Therapeutics In	Stock-Other	58.10%	+58.10%	NEW
2	SG7	Sage Therapeutics INC	Stock-Other	25.46%	-41.20%	-26.56%
3	2655787D	Blueprint Medicines CORP	Stock-Other	14.73%	-5.65%	—
4	✓	Eleven Biotherapeutics INC	Stock-Other	1.09%	-0.33%	—
5	ZFGNUSD	Zafgen INC	Stock-Other	0.63%	-10.91%	-93.43%

Reported value over time

Sector allocation

Not enough sector-mapped data yet

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2015-09-30	5	$1.1B	100	1GBTUSD 2SG7 32655787D Top holdings2015-09-30 1.GBTUSD 2.SG7 3.2655787D 4.286221 5.ZFGNUSD
2015-06-30	4	$960.8M	70	1SG7 22655787D 3ZFGNUSD Top holdings2015-06-30 1.SG7 2.2655787D 3.ZFGNUSD 4.286221
2015-03-31	4	$937.6M	62	1SG723504653ZFGNUSD Top holdings2015-03-31 1.SG7 2.350465 3.ZFGNUSD 4.286221
2014-12-31	6	$1.2B	35	1SG7 2AGIO 3ZFGNUSD Top holdings2014-12-31 1.SG7 2.AGIO 3.ZFGNUSD 4.09609G 5.350465 6.286221
2014-09-30	6	$857.3M	89	1SG7 2AGIO 3ZFGNUSD Top holdings2014-09-30 1.SG7 2.AGIO 3.ZFGNUSD 4.350465 5.286221 6.09609G
2014-06-30	4	$468.3M	33	1AGIO2350465309609G Top holdings2014-06-30 1.AGIO 2.350465 3.09609G 4.286221
2014-03-31	4	$564.0M	56	1AGIO23504653286221 Top holdings2014-03-31 1.AGIO 2.350465 3.286221 4.09609G
2013-12-31	3	$353.0M	0	13504652AGIO309609G Top holdings2013-12-31 1.350465 2.AGIO 3.09609G

Holding changes this quarter

Third Rock Ventures, LLC's most significant position changes for 2015-09-30: New buy: Global Blood Therapeutics In (GBTUSD); Trim: Sage Therapeutics INC (SG7) — shares -26.56%; Trim: Zafgen INC (ZFGNUSD) — shares -93.43%.

Position changes disclosed by Third Rock Ventures, LLC for the quarter ending 2015-09-30, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	✓	Eleven Biotherapeutics INC	-0.3%	—	Unchanged
2	2655787D	Blueprint Medicines CORP	-5.7%	—	Unchanged
3	ZFGNUSD	Zafgen INC	-10.9%	-93.43%	Trim
4	SG7	Sage Therapeutics INC	-41.2%	-26.56%	Trim
5	GBTUSD	Global Blood Therapeutics In	—	NEW	New buy

FAQ

What is Third Rock Ventures, LLC and what type of investor is it?

Third Rock Ventures, LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2015-09-30), the firm manages a tracked equity portfolio valued at approximately $1.1B, spread across 5 disclosed positions.

What are Third Rock Ventures, LLC's largest equity positions?

Based on the latest 13F filing, Third Rock Ventures, LLC's top holdings by market value are: 1. Global Blood Therapeutics In (GBTUSD) — $622.3M (58.1%) 2. Sage Therapeutics INC (SG7) — $272.7M (25.5%) 3. Blueprint Medicines CORP (2655787D) — $157.8M (14.7%) 4. Eleven Biotherapeutics INC — $11.7M (1.1%) 5. Zafgen INC (ZFGNUSD) — $6.7M (0.6%)

What changes did Third Rock Ventures, LLC make in its most recent portfolio filing?

In the latest reported quarter, Third Rock Ventures, LLC made 3 notable position adjustments: 1 new positions were initiated, 0 existing holdings were added to, 2 positions were partially reduced, and 0 were completely exited. The largest of these moves: New buy: Global Blood Therapeutics In (GBTUSD); Trim: Sage Therapeutics INC (SG7) — shares -26.56%; Trim: Zafgen INC (ZFGNUSD) — shares -93.43%

What sectors does Third Rock Ventures, LLC focus on?

Sector breakdown data is not yet available for Third Rock Ventures, LLC. Check back after the next 13F processing cycle.