How many institutions held HOWL - Werewolf Therapeutics, Inc. - Common stock 0,0001$ per share in Q4 2023?

41 institutional investors reported HOWL - Werewolf Therapeutics, Inc. - Common stock 0,0001$ per share for Q4 2023. Use the holders table for investor-level position and value details.

Werewolf Therapeutics, Inc. - Common stock 0,0001$ per share (HOWL)

Q: What does CUSIP 95075A107 represent in this 13F holders report?

CUSIP 95075A107 is the security identifier for HOWL - Werewolf Therapeutics, Inc. - Common stock 0,0001$ per share used to aggregate holder disclosures.

CUSIP: 95075A107

Q4 2023 13F Holders as of 31 Dec 2023

Security type / class: Equity / Common stock 0,0001$ per share
Total 13F shares: 27,669,999
Total 13F value: $106,805,060
Share change: +3,787,065
Put/Call ratio: 2.7%
SEC-reported price per share: $3.86
Number of holders: 41
Value change: +$14,923,168
Number of buys: 23
Number of sells: 10
Shares outstanding: 48,791,115

Security key

95075A107

Report period

Q4 2023

Institutions

Top holders

HOWL full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2025 Werewolf Therapeutics, Inc. SEC filings Werewolf Therapeutics, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 95075A107

Newer quarter: Q3 2025

Recent filing periods:

Q3 2026 Q1 2026 Q4 2025 Q3 2025

Ownership snapshot

Top reported holders of HOWL - Werewolf Therapeutics, Inc. - Common stock 0,0001$ per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

RA CAPITAL MANAGEMENT, L.P.

Disclosed value leader

RA CAPITAL MANAGEMENT, L.P.

Comparable rows

0/15

Latest evidence

30 Sep 2023

13F Highest disclosed value: $13,150,045 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

RA CAPITAL MANAGEMENT, L.P. has the largest disclosed position value at $13.15M.

0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens RA CAPITAL MANAGEMENT, L.P.'s linked filing trail.

Disclosed position value Top 5

RA CAPITAL MANAGEMENT, L.P. $13.15M

MPM ASSET MANAGEMENT LLC $9.17M

PFM Health Sciences, LP $5.47M

MPM BioImpact LLC $5.11M

Rubric Capital Management LP $4.14M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
RA CAPITAL MANAGEMENT, L.P.	13F Company 13F	— denominator unverified	$13,150,045 6,144,881 shares	—	30 Sep 2023
MPM ASSET MANAGEMENT LLC	13F Company 13F	— denominator unverified	$9,168,128 4,284,172 shares	—	30 Sep 2023
PFM Health Sciences, LP	13F Company 13F	— denominator unverified	$5,474,723 2,558,282 shares	—	30 Sep 2023
MPM BioImpact LLC	13F Company 13F	— denominator unverified	$5,110,344 2,388,011 shares	—	30 Sep 2023
Rubric Capital Management LP	13F Company 13F	— denominator unverified	$4,141,664 1,935,357 shares	—	30 Sep 2023
BANK OF AMERICA CORP /DE/	13F Company 13F	— denominator unverified	$3,278,318 1,531,924 shares	—	30 Sep 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2023

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

27,669,999

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2023 vs Q1 2026 Across Filers

Q1 2026 holders

Q4 2023 holders

Holder diff

-6

Investor	Q1 2026 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q1 2026 value	Q4 2023 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend