Stamps.com Inc
+$2.8B
Net Activity
+13.28% total shares
Institutions Holding
270
Popularity Rank
#1472
Avg Weight
0.58%
Total Value
$6.2B
270 institutions currently hold STMP, with 26 net buyers and 34 net sellers this quarter.
Institutional Moves (Q3 2021)
Neutral
Based on recent trading activity
Net Selling Institutions
34
Net Buying Institutions
26
Top 5 by Value
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STMP ranks #1472 out of 33698 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
STMP is a top-conviction position for Equitec Proprietary Markets, LLC — at 38.6% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in STMP belongs to BlackRock Inc., but the position matters far more to Equitec Proprietary Markets, LLC, who has 38.6% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
BlackRock has added to its STMP position for two straight quarters, increasing it by $332.6M to reach $908.4M today.
Ken Griffin has trimmed its STMP position for two straight quarters, cutting it by $50.6M while still holding $69.4M.
+$527.0M
Total Buy Value
$1.2B
Total Sell Value
26
Net Buyers
34
Net Sellers
STMP does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2021-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
No Form 8-K filings for this ticker
852857200
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,239
Total reported value
$2.2T
3224 13F institutions increased their position this quarter
Institutions Holding
5,987
Total reported value
$3.6T
3028 13F institutions increased their position this quarter
Institutions Holding
6,149
Total reported value
$1.8T
2966 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,107
Total reported value
$712.4B
Held by 4107 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,086
Total reported value
$390.1B
Held by 4086 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,059
Total reported value
$377.5B
Held by 4059 institutions — one of the most-tracked stocks on AlphaSMO
Access STMP's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/STMPCLI
npx alphasmo stocks get STMPFull API & MCP documentation →