# STAMPS COM INC (STMP)

> Institutional ownership reported to the SEC as of Q3 2021, from Form 13F filings. Source: https://holderbook.com/stocks/STMP/

- Reporting holders: 269
- Reported value: $6.4B
- Held through calls: 7.1%
- Held through puts: 8.3%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [BlackRock Inc.](https://holderbook.com/funds/1364742-blackrock-inc/) | $908.4M | 2,754,459 | 0.0% | 12 |
| [VANGUARD GROUP INC](https://holderbook.com/funds/102909-vanguard-group-inc/) | $608.9M | 1,846,250 | 0.0% | 12 |
| [HBK INVESTMENTS L P](https://holderbook.com/funds/1011443-hbk-investments-l-p/) | $277.2M | 840,638 | 1.1% | 1 |
| [EQUITEC PROPRIETARY MARKETS, LLC](https://holderbook.com/funds/1143261-equitec-proprietary-markets-llc/) | $208.8M | 147,594 | 38.7% | 1 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $202.5M | 239,033 | 0.0% | 12 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $190.0M | 576,160 | 0.0% | 12 |
| [GLAZER CAPITAL, LLC](https://holderbook.com/funds/1076809-glazer-capital-llc/) | $187.3M | 568,088 | 3.3% | 1 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $166.1M | 503,618 | 0.0% | 16 |
| [DISCIPLINED GROWTH INVESTORS INC /MN](https://holderbook.com/funds/1050442-disciplined-growth-investors-inc-mn/) | $149.8M | 454,255 | 3.0% | 12 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $142.4M | 331,687 | 0.1% | 4 |
| [PEAK6 Investments LLC](https://holderbook.com/funds/1756111-peak6-investments-llc/) | $135.0M | 0 | 0.3% | 12 |
| [VISTA EQUITY PARTNERS MANAGEMENT, LLC](https://holderbook.com/funds/1569532-vista-equity-partners-management-llc/) | $134.2M | 406,975 | 1.3% | 3 |
| [FIL Ltd](https://holderbook.com/funds/318989-fil-ltd/) | $129.3M | 392,000 | 0.1% | 1 |
| [Verition Fund Management LLC](https://holderbook.com/funds/1454027-verition-fund-management-llc/) | $127.7M | 166,405 | 1.1% | 1 |
| [JPMORGAN CHASE & CO](https://holderbook.com/funds/19617-jpmorgan-chase-co/) | $125.8M | 381,583 | 0.0% | 12 |
| [GROUP ONE TRADING, L.P.](https://holderbook.com/funds/932540-group-one-trading-l-p/) | $118.5M | 10,815 | 0.1% | 12 |
| [Walleye Trading LLC](https://holderbook.com/funds/1388391-walleye-trading-llc/) | $116.7M | 61,138 | 0.4% | 12 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $103.3M | 313,156 | 0.0% | 12 |
| [Steel Peak Wealth Management LLC](https://holderbook.com/funds/1801868-steel-peak-wealth-management-llc/) | $100.2M | 303,847 | 6.6% | 8 |
| [DIMENSIONAL FUND ADVISORS LP](https://holderbook.com/funds/354204-dimensional-fund-advisors-lp/) | $88.3M | 267,793 | 0.0% | 12 |
| [GOLDMAN SACHS GROUP INC](https://holderbook.com/funds/886982-goldman-sachs-group-inc/) | $77.0M | 233,623 | 0.0% | 12 |
| [NORGES BANK](https://holderbook.com/funds/1374170-norges-bank/) | $75.3M | 228,384 | 0.0% | 15 |
| [Simcoe Capital Management, LLC](https://holderbook.com/funds/1633362-simcoe-capital-management-llc/) | $72.4M | 219,410 | 7.1% | 10 |
| [Caption Management, LLC](https://holderbook.com/funds/1706766-caption-management-llc/) | $69.8M | 74,134 | 0.8% | 3 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $69.4M | 20,276 | 0.0% | 12 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q3 2021 | 269 | $6.4B |
| Q2 2021 | 255 | $3.4B |
| Q1 2021 | 267 | $3.5B |
| Q4 2020 | 283 | $3.7B |
| Q3 2020 | 275 | $4.2B |
| Q2 2020 | 254 | $3.0B |
| Q1 2020 | 224 | $2.2B |
| Q4 2019 | 207 | $1.6B |
| Q3 2019 | 188 | $1.4B |
| Q2 2019 | 177 | $921.9M |
| Q1 2019 | 255 | $1.7B |
| Q4 2018 | 287 | $3.0B |