13F reference period
Q3 2026
Security Snapshot
SELLAS Life Sciences Group, Inc. - COMMON STOCK (SLS) Institutional Ownership
CUSIP: 81642T209
13F Institutional Holders and Ownership History from Q4 2019 to Q3 2026
Institutions Reporting
116
Shares (Excl. Options)
38.09M
Full value: 38,086,975 · shares · 30 Sep 2026Price
$12.31
The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- SLS on Nasdaq
- All holders as of 30 Sep 2026
- Q3 2026
- Total 13F shares
- 38,086,975
- Total 13F value
- $468,152,857
- Portfolio coverage rank
- 0%
- Share change
- -3,789,367
- Value change
- -$58,927,368
- Number of holders
- 116
- Shares outstanding
- 203,393,608
- SEC-reported price per share
- $12.41
- Insider filing price
- $12.41
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- SLS - SELLAS Life Sciences Group, Inc. - COMMON STOCK is tracked under CUSIP 81642T209.
- 116 institutions reported positions in Q3 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 192 to 116 between Q2 2026 and Q3 2026.
- SEC-reported value moved from to
$1.08B
Full value: $1,079,069,829 · USD · 30 Jun 2026.$468.15M
Full value: $468,152,857 · USD · 30 Sep 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 116 institutions filings for Q3 2026.
Security key
81642T209
13F reference period
Q3 2026
13F holders
116
13D/G owners
5
CIK / CUSIP context first
Open Q3 2026 holders
SLS full holder history
SELLAS Life Sciences Group, Inc. SEC filings
SELLAS Life Sciences Group, Inc. company facts
SELLAS Life Sciences Group, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 81642T209:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
SLS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.9% | +16% | $195,392,752 | +$45,994,518 | 15,872,685 | +31% | BlackRock, Inc. | 30 Sep 2026 |
| STATE STREET CORP | 5.1% | -27% | $128,729,848 | -$32,557,436 | 10,373,074 | -20% | STATE STREET CORPORATION | 30 Sep 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $121,988,428 | 9,666,278 | Vanguard Capital Management | 30 Jun 2026 | |||
| Anson Funds Management LP | 4.9% | -13% | $31,046,889 | +$6,010,196 | 7,481,178 | +24% | Anson Funds Management LP | 31 Dec 2025 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 3.7% | $24,560,261 | 6,514,658 | Highbridge Capital Management, LLC | 31 Dec 2025 |
As of 30 Sep 2026,
116
institutional investors reported holding
shares of
SELLAS Life Sciences Group, Inc. - COMMON STOCK (SLS).
This represents
19%
of the company’s total
outstanding shares.
38.09M
Full value: 38,086,975 · shares · 30 Sep 2026203.39M
Full value: 203,393,608 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
18%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| STATE STREET CORP | 5.1% | 10,373,074 | -20% | 0% | $127,692,541 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.4% | 8,942,647 | +8.7% | 0% | $110,083,985 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 5,171,819 | +5.9% | 0% | $63,677,118 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1% | 2,297,581 | +6.3% | 0% | $28,283,222 |
| MORGAN STANLEY | 0.74% | 1,511,107 | +22% | 0% | $18,601,728 |
| VANGUARD FIDUCIARY TRUST CO | 0.71% | 1,441,271 | +7.9% | 0% | $17,742,046 |
| DAGCO, INC. | 0.66% | 1,336,449 | +8.4% | 2.9% | $16,451,691 |
| GROUP ONE TRADING LLC | 0.34% | 684,301 | 0.26% | $8,423,745 | |
| Swiss National Bank | 0.2% | 397,600 | +10% | 0% | $4,894,456 |
| Creative Planning | 0.18% | 368,727 | +422% | 0% | $4,539,030 |
| MARSHALL WACE, LLP | 0.14% | 283,834 | 0% | $3,493,997 | |
| LPL Financial LLC | 0.14% | 277,075 | +78% | 0% | $3,410,793 |
| ALPS ADVISORS INC | 0.13% | 267,545 | +42% | 0.02% | $3,293,479 |
| Rafferty Asset Management, LLC | 0.12% | 245,946 | +2.5% | 0.01% | $3,027,595 |
| Everhart Financial Group, Inc. | 0.12% | 240,213 | -17% | 0.18% | $2,957,022 |
| Mariner, LLC | 0.11% | 226,857 | +14% | 0% | $2,792,602 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 0.11% | 226,799 | +12% | 0% | $2,791,896 |
| POLEN CAPITAL MANAGEMENT LLC | 0.11% | 218,091 | 0.03% | $2,684,700 | |
| RAYMOND JAMES FINANCIAL INC | 0.1% | 205,145 | 0% | $2,525,333 | |
| DEUTSCHE BANK AG\ | 0.1% | 197,537 | +3.9% | 0% | $2,431,680 |
| FRANKLIN TEMPLETON INC | 0.1% | 195,673 | +64% | 0% | $1,788,452 |
| Harvest Investment Services, LLC | 0.09% | 184,585 | +95% | 0.39% | $2,272,241 |
| Vontobel Holding Ltd. | 0.07% | 147,719 | +0.65% | 0.01% | $1,818,421 |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.07% | 145,811 | +16% | 0% | $1,794,933 |
| Tidal Investments LLC | 0.07% | 133,032 | +3.3% | 0% | $1,637,624 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
28
Headline period
Q3 2026
Rows shown
1-25 of 28
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 38,086,975 | $468,152,857 | -$58,927,368 | $12.31 | 116 |
| 2026 Q2 | 73,491,015 | $1,079,069,829 | +$308,980,802 | $14.76 | 192 |
| 2026 Q1 | 53,961,117 | $228,425,549 | +$70,779,572 | $4.23 | 160 |
| 2025 Q4 | 35,512,660 | $133,935,339 | +$23,683,756 | $3.77 | 112 |
| 2025 Q3 | 32,917,301 | $53,012,951 | +$9,796,863 | $1.61 | 92 |
| 2025 Q2 | 26,771,579 | $58,629,839 | +$27,498,028 | $2.19 | 78 |
| 2025 Q1 | 14,287,843 | $15,431,614 | +$8,743,246 | $1.08 | 43 |
| 2024 Q4 | 6,195,241 | $6,443,955 | +$751,049 | $1.04 | 29 |
| 2024 Q3 | 5,385,570 | $6,729,539 | +$1,661,405 | $1.25 | 30 |
| 2024 Q2 | 4,056,846 | $4,828,846 | -$3,466,325 | $1.19 | 29 |
| 2024 Q1 | 7,717,105 | $7,794,727 | +$4,207,509 | $1.01 | 27 |
| 2023 Q4 | 3,493,044 | $3,702,505 | +$352,826 | $1.06 | 29 |
| 2023 Q3 | 2,751,676 | $4,512,830 | -$594,241 | $1.64 | 25 |
| 2023 Q2 | 3,114,137 | $4,889,035 | +$175,383 | $1.57 | 22 |
| 2023 Q1 | 2,996,127 | $4,284,993 | +$1,438,716 | $1.43 | 20 |
| 2022 Q4 | 1,889,269 | $4,456,259 | +$91,291 | $2.36 | 27 |
| 2022 Q3 | 2,186,943 | $4,418,000 | -$1,738,313 | $2.02 | 25 |
| 2022 Q2 | 2,979,307 | $6,641,000 | +$1,671,317 | $2.23 | 23 |
| 2022 Q1 | 1,688,629 | $11,276,000 | -$279,247 | $6.68 | 25 |
| 2021 Q4 | 1,733,782 | $9,586,000 | -$1,340,161 | $5.53 | 26 |
| 2021 Q3 | 1,859,470 | $17,100,000 | -$844,204 | $9.16 | 29 |
| 2021 Q2 | 1,897,926 | $21,282,000 | +$4,739,163 | $11.10 | 28 |
| 2021 Q1 | 1,552,743 | $13,246,990 | +$5,287,808 | $8.54 | 28 |
| 2020 Q4 | 925,075 | $5,374,000 | +$2,503,596 | $5.81 | 17 |
| 2020 Q3 | 616,674 | $1,633,000 | +$397,179 | $2.65 | 10 |