Ticker · CUSIP 39813G109
Holders (tracked)
10
Combined shares
6,015,615
Combined value
$54.32M
Last close
$5.95
Quarter
2025Q4
Price · 1Y$5.95-7.11 (-54.44%)H $15.23 · L $5.28 · Avg Vol 1.1M
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is -34.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
15 events
- D.E. Shaw & Co. added2026-02-17+284,393 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−190,037 shares · 2025Q4Position
- Two Sigma Investments exited2026-02-17−74,588 shares · 2025Q4Position
- +39,757 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−10,722 shares · 2025Q4Position
- Wellington Management added2026-02-17+405,381 shares · 2025Q4Position
- AQR Capital Management opened position2026-02-17+18,297 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−78,326 shares · 2025Q4Position
- −144,937 shares · 2025Q3Position
- Ron Baron (Baron Capital / BAMCO) added2025-11-14+322 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+4,423 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−951,662 shares · 2025Q3Position
- D.E. Shaw & Co. opened position2025-11-14+41,542 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−206,524 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−195,345 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of GDYN…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2020Q1 | $8.94 | -33.4% | $176K |
| Ken Griffin (Citadel Advisors) | 2020Q1 | $8.94 | -33.4% | $176K |
| Ken Griffin (Citadel Advisors) | 2020Q1 | $8.94 | -33.4% | $176K |
| D.E. Shaw & Co. | 2021Q2 | $9.53 | -37.5% | $1.9M |
| Izzy Englander (Millennium Mgmt) | 2020Q1 | $10.29 | -42.2% | $237K |
| Wellington Management | 2021Q3 | $11.57 | -48.6% | $14.0M |
| Renaissance Technologies | 2020Q2 | $11.62 | -48.8% | $920K |
| Ron Baron (Baron Capital / BAMCO) | 2020Q1 | $11.77 | -49.5% | $17.9M |
| AQR Capital Management | 2021Q3 | $15.14 | -60.7% | $109K |
| T. Rowe Price | 2021Q3 | $16.45 | -63.8% | $233K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Izzy Englander (Millennium Mgmt)+39,757$359K
- AQR Capital Management+18,297$165K
Added to2
- Wellington Management+405,381$3.7M
- D.E. Shaw & Co.+284,393$2.6M
Trimmed3
- Ken Griffin (Citadel Advisors)−190,037$1.7M
- Renaissance Technologies−78,326$707K
- T. Rowe Price−10,722$97
Exited1
- Two Sigma Investments−74,588$575K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 12 | $1.26B |
| 2022Q2 | 11 | $133.6M |
| 2022Q3 | 10 | $160.6M |
| 2022Q4 | 9 | $100.0M |
| 2023Q1 | 9 | $109.5M |
| 2023Q2 | 12 | $82.6M |
| 2023Q3 | 8 | $95.9M |
| 2023Q4 | 7 | $106.8M |
| 2024Q1 | 6 | $118.7M |
| 2024Q2 | 10 | $109.4M |
| 2024Q3 | 10 | $95.3M |
| 2024Q4 | 10 | $77.9M |
| 2025Q1 | 11 | $86.9M |
| 2025Q2 | 8 | $79.0M |
| 2025Q3 | 8 | $43.1M |
| 2025Q4 | 10 | $54.3M |
Who owns GDYN
10 super-investors · 2025Q4
Tracked stake
6.02M
shares
Combined value
$54M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added2Trim5Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ron Baron Baron Capital / BAMCO | 3.00M | $27M |
| 2 | Wellington Management | 2.36M | $21M |
| 3 | D.E. Shaw & Co. | 325.9K | $3M |
| 4 | Renaissance Technologies | 154.6K | $1M |
| 5 | Ken Griffin Citadel Advisors | 39.8K | $360K |
| 6 | Izzy Englander Millennium Mgmt | 39.8K | $359K |
| 7 | T. Rowe Price | 39.1K | $353K |
| 8 | Ken Griffin Citadel Advisors | 29.6K | $267K |
| 9 | AQR Capital Management | 18.3K | $165K |
| 10 | Ken Griffin Citadel Advisors | 11.4K | $103K |
Recent moves
20 transactions
- +18,297 · 2025Q4
- +405,381 · 2025Q4
- −74,588 · 2025Q4
- TRIMT. Rowe Price−10,722 · 2025Q4
- +284,393 · 2025Q4
- −190,037 · 2025Q4
- +39,757 · 2025Q4
- −78,326 · 2025Q4
- −144,937 · 2025Q3
- −206,524 · 2025Q3
- −951,662 · 2025Q3
- +41,542 · 2025Q3
- +4,423 · 2025Q3
- +322 · 2025Q3
- −195,345 · 2025Q3
- +226,587 · 2025Q2
- +1,020,947 · 2025Q2
- −24,065 · 2025Q2
- +6,402 · 2025Q2
- −61,269 · 2025Q2
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