Vault-13

CYCLERION THERAPEUTICS INC

COM · CUSIP 23255M204

18 institutional holders -1 vs Q2 2023
1,072,2751.1m shares reported held*
$3.7mreported value*
1 new 3 added 4 reduced 3 sold out net sold ≈ $242.3k (-70.9k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $3.41. Options: 4 managers hold calls ($401.1k notional), 1 hold puts ($0).

Trends to Q3 2023

Institutional holders

Managers reporting a position, each quarter

01020Q1 23: 1Q2 23: 19Q3 23: 1818Q1 23Q2 23Q3 23
Numbers
QuarterHolders
Q1 20231
Q2 202319
Q3 202318

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q2 23: 19 bought or addedQ2 23: 1 cut or sold outQ2 23Q3 23: 4 bought or addedQ3 23: 7 cut or sold outQ3 23
Numbers
QuarterBought or addedCut or sold out
Q2 2023191
Q3 202347

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$200k$400k$600kQ4 22 calls: $0Q4 22 puts: $0Q4 22P/C —Q1 23 calls: $0Q1 23 puts: $0Q1 23P/C —Q2 23 calls: $572.8kQ2 23 puts: $0Q2 23P/C 0.00Q3 23 calls: $401.1kQ3 23 puts: $0Q3 23P/C 0.00
Numbers
QuarterCallsPutsP/C
Q4 2022$0$0—
Q1 2023$0$0—
Q2 2023$572.8k$00.00
Q3 2023$401.1k$00.00

Biggest buyers

GEODE CAPITAL MANAGEMENT, LLC Added +1,027+1.0k
OSAIC HOLDINGS, INC. New +188+188
UBS Group AG Added +90+90
ROYAL BANK OF CANADA Added +73+73

Biggest sellers

VANGUARD GROUP INC Reduced -40,638-40.6k
CAPTRUST FINANCIAL ADVISORS Sold out -14,631-14.6k
JANE STREET GROUP, LLC Sold out -13,364-13.4k
ACADIAN ASSET MANAGEMENT LLC Reduced -3,201-3.2k
FMR LLC Reduced -400-400
RHUMBLINE ADVISERS Reduced -21-21
CWM, LLC Sold out -14-14

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Unchanged $291.0k85.6k shares
GROUP ONE TRADING LLC Unchanged $60.9k17.9k shares
WOLVERINE TRADING, LLC Reduced $49.2k14.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Hecht Peter M 13D · may seek influence -8.5 pts · filed 2026-07-20 19.4% -8.5 pts 910.2k≈ $3.1m 2026-07-20
FMR LLC 13G · institution +14.8 pts · filed 2026-05-07 15.0% +14.8 pts 649.5k≈ $2.2m 2026-05-07
BALYASNY ASSET MANAGEMENT L.P. 13G · institution new · filed 2026-08-14 7.3% new 317.5k≈ $1.1m 2026-08-14
ADAR1 Capital Management, LLC 13G · institution new · filed 2026-08-14 7.0% new 298.8k≈ $1.0m 2026-08-14
J. WOOD CAPITAL ADVISORS LLC 13G · passive investor new · filed 2025-10-17 5.4% new 181.8k≈ $616.4k 2025-10-17

Holders, Q3 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Slate Path Capital LP 0.03% of their portfolio New York, NY 357,880357.9k $1.2m $1.2m 0.03% Unchanged
2 MFN Partners Management, LP 0.02% of their portfolio BOSTON, MA 169,460169.5k $576.2k $576.2k 0.02% Unchanged
3 FMR LLC 0.00% of their portfolio BOSTON, MA 164,549164.5k $559.5k $559.5k 0.00% Reduced -400 -400
4 TYNDALL CAPITAL PARTNERS L P 100.00% of their portfolio NEW YORK, NY 147,712147.7k $505.2k $505.2k 100.00% Not comparable
5 Artal Group S.A. 0.02% of their portfolio LUXEMBOURG, N4 138,403138.4k $473.0k $473.0k 0.02% Unchanged
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 40,53140.5k $138.6k $138.6k 0.00% Reduced -40.6k -40,638
7 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 30,74930.7k $104.6k $104.6k 0.00% Added +1.0k +1,027
8 BlackRock Inc. 0.00% of their portfolio New York, NY 18,00018.0k $61.6k $61.6k 0.00% Unchanged
9 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 2,2362.2k $7.0k $7.0k 0.00% Reduced -3.2k -3,201
10 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 912912 $3.0k $3.0k 0.00% Added +73 +73
11 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 823823 $2.8k $2.8k 0.00% Unchanged
12 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 540540 $1.8k $1.8k 0.00% Unchanged
13 UBS Group AG 0.00% of their portfolio ZURICH, V8 276276 $944 $944 0.00% Added +90 +90
14 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 188188 $643 $643 0.00% New
15 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 1414 $48 $48 0.00% Unchanged
16 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 11 $3 $3 0.00% Reduced -21 -21
17 NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO 0.00% of their portfolio MILWAUKEE, WI 11 $3 $3 0.00% Unchanged
18 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged