PULM Pulmatrix, Inc.

NASDAQ
$1.39

Pulmatrix, Inc. (PULM) Institutional Ownership

What the institutions did with PULM last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
17
filed both this quarter and last
Managers holding
15
+0 on the quarter
Buyers
5
2 opened new
Sellers
5
2 sold out entirely
Buyer share
50.0%
of managers who traded it
Breadth
+0.0
net buyers, as a share of those trading

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
RENAISSANCE TECHNOLOGIES LLC 122.7K 36.7%
BlackRock, Inc. 54.9K 16.4%
GEODE CAPITAL MANAGEMENT, LLC 33.3K 10.0%
VANGUARD CAPITAL MANAGEMENT LLC 32.3K 9.7%
SBI Securities Co., Ltd. 31.3K 9.4%
Shay Capital LLC 18.9K 5.6%
VANGUARD FIDUCIARY TRUST CO 14.7K 4.4%
STATE STREET CORP 13.9K 4.2%
XTX Topco Ltd 12.0K 3.6%
UBS Group AG 515 0.2%
BARCLAYS PLC 15 0.0%
ROYAL BANK OF CANADA 7 0.0%
Farther Finance Advisors, LLC 7 0.0%
Allworth Financial LP 3 0.0%
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO 1 0.0%

Largest changes

Manager Action Previous Current Change
Shay Capital LLC New 0 18.9K +18.9K
JANE STREET GROUP, LLC Sold Out 14.6K 0 -14.6K
RENAISSANCE TECHNOLOGIES LLC Increased 109.1K 122.7K +13.6K
GEODE CAPITAL MANAGEMENT, LLC Reduced 44.6K 33.3K -11.3K
XTX Topco Ltd Reduced 13.7K 12.0K -1.7K
VANGUARD CAPITAL MANAGEMENT LLC Reduced 33.6K 32.3K -1.3K
SBI Securities Co., Ltd. Increased 30.1K 31.3K +1.2K
UBS Group AG Increased 23 515 +492
Tower Research Capital LLC (TRC) Sold Out 207 0 -207
BARCLAYS PLC New 0 15 +15

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.