Werewolf Therapeutics, Inc. - Common Stock, $0.0001 par value 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 par value per share used to aggregate holder disclosures.

Q: How many institutions held HOWL - Werewolf Therapeutics, Inc. - Common Stock, $0.0001 par value per share in Q4 2023?

41 institutional investors reported HOWL - Werewolf Therapeutics, Inc. - Common Stock, $0.0001 par value per share for Q4 2023. Use the holders table for investor-level position and value details.

CUSIP: 95075A107

Q4 2023 13F Holders as of 31 Dec 2023

Security type / class: Equity / Common Stock, $0.0001 par value 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: 48,427,829

Security key

95075A107

Report period

Q4 2023

Institutions

Top holders

HOWL full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2024 Previous quarter: Q3 2023 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: Q1 2024 Previous quarter: Q3 2023

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top reported holders of HOWL - Werewolf Therapeutics, Inc. - Common Stock, $0.0001 par value 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

15/15

Latest evidence

30 Sep 2023

13F Lead comparable stake: 13% Showing 1-6 of 15 holder rows.

Quick read

RA CAPITAL MANAGEMENT, L.P. leads the comparable SEC ownership view at 13%.

15 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.

Comparable ownership Top 5

RA CAPITAL MANAGEMENT, L.P. 13%

MPM ASSET MANAGEMENT LLC 8.8%

PFM Health Sciences, LP 5.3%

MPM BioImpact LLC 4.9%

Rubric Capital Management LP 4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

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	13%	$13,150,045 6,144,881 shares	—	30 Sep 2023
MPM ASSET MANAGEMENT LLC	13F Company 13F	8.8%	$9,168,128 4,284,172 shares	—	30 Sep 2023
PFM Health Sciences, LP	13F Company 13F	5.3%	$5,474,723 2,558,282 shares	—	30 Sep 2023
MPM BioImpact LLC	13F Company 13F	4.9%	$5,110,344 2,388,011 shares	—	30 Sep 2023
Rubric Capital Management LP	13F Company 13F	4%	$4,141,664 1,935,357 shares	—	30 Sep 2023
BANK OF AMERICA CORP /DE/	13F Company 13F	3.2%	$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 Q3 2023 Across Filers

Q3 2023 holders

Q4 2023 holders

Holder diff

Investor	Q3 2023 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q3 2023 value	Q4 2023 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend