Spero Therapeutics, Inc.
SPRO- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001701108
No open-market purchases or sales by Spero Therapeutics, Inc. insiders were filed in the last 90 days; 59 institutions reported holding it in 13F filings for Q2 2026, worth $47.5M in total; no superinvestor holds it.
Q4 2023 vs. Q3 2023
How the institutions holding Spero Therapeutics, Inc. changed between Q3 2023 and Q4 2023.
All holders in Q4 2023All holders in Q3 2023
| Measure | Q3 2023 | Of which not filed for Q4 2023 | Q4 2023 | Change |
|---|---|---|---|---|
| Holders | 54 | 2 | 50 | −2 |
| Shares | 14.2M | 1.60M | 13.8M | +1.25M (+9.9%) |
| Value | $17.2M | $1.94M | $19.6M | +$4.42M (+29.1%) |
2 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so the changes leave them out.
New holders (6)
Institutions that held Spero Therapeutics, Inc. at the end of Q4 2023 but not at the end of Q3 2023.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| ADAR1 Capital Management, LLC | 1,067,711 | $1.57M | 0.70% |
| Citadel Advisors LLC | 32,274 | $47.4K | 0.00% |
| DLK Investment Management, LLC | 31,355 | $46.1K | 0.02% |
| Three Seasons Wealth, LLC | 15,000 | $22.1K | 0.02% |
| Two Sigma Securities, LLC | 10,301 | $15.1K | 0.00% |
| FMR LLC | 189 | $278 | 0.00% |
Sold out (8)
Institutions that held Spero Therapeutics, Inc. at the end of Q3 2023 and filed for Q4 2023 without it.
| Institution | Shares, Q3 2023 | Value, Q3 2023 |
|---|---|---|
| Rock Springs Capital Management LP | 57,373 | $69.4K |
| HRT Financial LP | 18,627 | $22.0K |
| Two Sigma Investments, LP | 17,023 | $20.6K |
| ERn Financial, LLC | 15,766 | $19.1K |
| WR Wealth Planners, LLC | 2,600 | $3.15K |
| Cullen/Frost Bankers, Inc. | 2,000 | $2.42K |
| Beaird Harris Wealth Management, LLC | 202 | $245 |
| Heritage Wealth Advisors | 187 | $226 |
Not filed for Q4 2023 yet (2)
Institutions that held Spero Therapeutics, Inc. at the end of Q3 2023 and haven't filed a 13F for Q4 2023. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2023 | Value, Q3 2023 |
|---|---|---|
| Atlas Venture Associates IX, LLC | 1,353,303 | $1.64M |
| OUP Management Co., LLC | 249,070 | $301.4K |