YORK SPACE SYSTEMS INC YSS
COM · Common Stock · CUSIP 987084100 · ISIN US9870841007
American space technologies company
- SectorIndustrials
- IndustryGuided Missiles & Space Vehicles & Parts
- HeadquartersGreenwood Village, CO
- Websiteyorkspacesystems.com
- FilingsSEC EDGAR
* 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 ($267.4k this quarter). Holder counts are more reliable. Shares outstanding: 137.4m as of 2026-08-12, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $24.61. Options: 9 managers hold calls ($25.1m notional), 9 hold puts ($40.2m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q1 2026 | 140 |
| Q2 2026 | 162 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $0 | — |
| Q4 2025 | $0 | $0 | — |
| Q1 2026 | $8.0m | $10.4m | 1.30 |
| Q2 2026 | $25.1m | $40.2m | 1.60 |
Biggest buyers
| Tidal Investments LLC | New | +1.8m |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Added | +1.4m |
| WESTWOOD HOLDINGS GROUP INC | Added | +1.3m |
| STATE STREET CORP | Added | +1.1m |
| Hood River Capital Management LLC | Added | +975.4k |
| FRONTIER CAPITAL MANAGEMENT CO LLC | New | +733.0k |
| Penserra Capital Management LLC | New | +642.0k |
| Temasek Holdings (Private) Ltd | Added | +577.8k |
| VOYA INVESTMENT MANAGEMENT LLC | Added | +540.7k |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | Added | +504.3k |
Biggest sellers
| Bank of New York Mellon Corp | Reduced | -1.6m |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -1.2m |
| CITADEL ADVISORS LLC | Reduced | -920.6k |
| LORD, ABBETT & CO. LLC | Reduced | -662.9k |
| AMERIPRISE FINANCIAL INC | Reduced | -585.9k |
| Daiwa Securities Group Inc. | Reduced | -576.2k |
| Granahan Investment Management, LLC | Reduced | -499.4k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Reduced | -492.1k |
| Artisan Partners Limited Partnership | Reduced | -394.3k |
| Roubaix Capital, LLC | Sold out | -382.9k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $7.8m317.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $7.7m313.1k shares |
| PEAK6 LLC | New | $2.1m86.8k shares |
| JANE STREET GROUP, LLC | Added | $2.0m82.6k shares |
| Sculptor Capital LP | New | $1.9m76.1k shares |
| GROUP ONE TRADING LLC | Added | $1.6m63.1k shares |
| IMC-Chicago, LLC | Added | $1.4m57.4k shares |
| SIMPLEX TRADING, LLC | Added | $544.1k22.1k shares |
| Daiwa Securities Group Inc. | New | $34.5k1.4k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $20.1m815.7k shares |
| GROUP ONE TRADING LLC | Added | $9.2m372.5k shares |
| JANE STREET GROUP, LLC | New | $5.1m206.9k shares |
| Sculptor Capital LP | New | $2.3m92.0k shares |
| GOLDMAN SACHS GROUP INC | New | $1.5m60.2k shares |
| CITADEL ADVISORS LLC | Added | $1.1m44.7k shares |
| SIMPLEX TRADING, LLC | Added | $512.1k20.8k shares |
| IMC-Chicago, LLC | Added | $482.6k19.6k shares |
| Daiwa Securities Group Inc. | New | $34.5k1.4k shares |
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.
| Holder | Stake |
|---|---|
| AEROEQUITY GP, LLC 13G · exempt (held before listing) +0.7 pts · filed 2026-08-14 | 24.0% |
| BlackRock Portfolio Management LLC 13G · exempt (held before listing) new · filed 2026-04-29 | 14.0% |
| Wallinger Dirk 13G · exempt (held before listing) new · filed 2026-05-15 | 8.6% |
| BlackRock, Inc. 13G · institution new · filed 2026-10-27 | 5.4% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 2 | $150.0k | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-07 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $2.2m200.2k shares |
| 2026-08-06 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $2.3m201.5k shares |
| 2026-08-05 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $1.7m128.0k shares |
| 2026-08-04 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $8.5m546.6k shares |
| 2026-08-03 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $206.7k13.8k shares |
| 2026-07-31 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $538.6k35.6k shares |
| 2026-07-30 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $2.1m140.8k shares |
| 2026-07-29 | BlackRock Portfolio Management LLC 10% owner · See footnotes | Sold | $970.5k63.4k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 19.2m $473.0m | Added +200.2k |
| AE INDUSTRIAL PARTNERS, LP 21.10% of their portfolio | 11.7m $288.7m | Added +430.1k |
| Allianz Asset Management GmbH 0.07% of their portfolio | 2.7m $67.1m | Unchanged |
| Hood River Capital Management LLC 0.35% of their portfolio | 2.0m $48.4m | Added +975.4k |
| Tema ETFs LLC 1.52% of their portfolio | 1.9m $46.9m | First filing |
| Tidal Investments LLC 0.11% of their portfolio | 1.8m $45.4m | New |
| WESTWOOD HOLDINGS GROUP INC 0.32% of their portfolio | 1.7m $42.8m | Added +1.3m |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 1.6m $39.8m | Added +540.7k |
| UBS Group AG 0.01% of their portfolio | 1.5m $37.2m | Added +458.9k |
| STATE STREET CORP 0.00% of their portfolio | 1.4m $35.3m | Added +1.1m |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.04% of their portfolio | 1.4m $33.7m | Added +1.4m |
| Clearbridge Investments, LLC 0.03% of their portfolio | 1.3m $32.5m | Reduced -27.1k |
| Temasek Holdings (Private) Ltd 0.07% of their portfolio | 1.0m $25.3m | Added +577.8k |
| SYSTEMATIC FINANCIAL MANAGEMENT LP 0.47% of their portfolio | 961.2k $23.7m | Added +504.3k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 844.1k $20.8m | Added +4.6k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 821.0k $20.2m | Added +33.5k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.17% of their portfolio | 733.0k $18.0m | New |
| Burkehill Global Management, LP 0.59% of their portfolio | 668.7k $16.5m | Unchanged |
| Penserra Capital Management LLC 0.12% of their portfolio | 642.0k $15.8m | New |
| SEI INVESTMENTS CO 0.01% of their portfolio | 632.6k $15.6m | Added +217.2k |
| ExodusPoint Capital Management, LP 0.13% of their portfolio | 570.8k $14.1m | Reduced -22.3k |
| Allspring Global Investments Holdings, LLC 0.02% of their portfolio | 557.3k $13.7m | Reduced -174.9k |
| Granahan Investment Management, LLC 0.41% of their portfolio | 468.2k $11.5m | Reduced -499.4k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.01% of their portfolio | 465.1k $11.2m | Reduced -20.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 459.7k $11.3m | Added +31.6k |
| MORGAN STANLEY 0.00% of their portfolio | 386.5k $9.5m | Added +102.9k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 373.9k $9.2m | Added +9.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 370.4k $9.1m | Added +259.6k |
| Stephens Investment Management Group LLC 0.09% of their portfolio | 348.8k $8.6m | Reduced -223.1k |
| NISSAY ASSET MANAGEMENT CORP /JAPAN 0.04% of their portfolio | 345.1k $8.5m | New |
| Artisan Partners Limited Partnership 0.01% of their portfolio | 311.4k $7.7m | Reduced -394.3k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio | 300.0k $7.4m | Reduced -100.0k |
| ArrowMark Colorado Holdings LLC 0.28% of their portfolio | 268.9k $6.6m | Reduced -379.6k |
| TORONTO DOMINION BANK 0.01% of their portfolio | 263.0k $6.5m | New |
| SEGALL BRYANT & HAMILL, LLC 0.07% of their portfolio | 235.6k $5.8m | New |
| Ghisallo Capital Management LLC 0.10% of their portfolio | 200.0k $4.9m | Reduced -207.8k |
| Resolute Capital Asset Partners LLC 1.94% of their portfolio | 184.2k $4.5m | Reduced -20.0k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 171.9k $4.2m | Reduced -1.2m |
| Vident Advisory, LLC 0.03% of their portfolio | 170.5k $4.2m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 160.5k $4.0m | Added +4.3k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 156.6k $3.9m | Added +103.0k |
| LORD, ABBETT & CO. LLC 0.01% of their portfolio | 155.1k $3.8m | Reduced -662.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 152.4k $3.8m | Added +15.8k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 152.2k $3.7m | Added +140.4k |
| Blackstone Inc. 0.01% of their portfolio | 150.0k $3.7m | Unchanged |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 137.0k $3.4m | Added +8.8k |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 133.2k $3.3m | Reduced -155.3k |
| TCW GROUP INC 0.02% of their portfolio | 128.2k $3.2m | New |
| Orion Porfolio Solutions, LLC 0.02% of their portfolio | 126.1k $3.1m | Added +44.6k |
| Swedbank AB 0.00% of their portfolio | 121.9k $3.0m | Reduced -32.7k |
| Stenham Asset Management Ltd 1.95% of their portfolio | 110.7k $2.7m | Unchanged |
| Nuveen, LLC 0.00% of their portfolio | 105.4k $2.6m | Added +84.7k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 101.5k $2.5m | Reduced -77.1k |
| NORGES BANK 0.00% of their portfolio | 100.0k $2.5m | Not comparable |
| FIFTH THIRD BANCORP 0.00% of their portfolio | 97.4k $2.4m | Added +96.9k |
| FMR LLC 0.00% of their portfolio | 90.0k $2.2m | Reduced -5.6k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 71.1k $1.7m | Added +4.8k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 66.0k $1.6m | Reduced -24.9k |
| EXCHANGE TRADED CONCEPTS, LLC 0.01% of their portfolio | 64.9k $1.6m | Added +47.0k |
| Diametric Capital, LP 0.16% of their portfolio | 62.5k $1.5m | Reduced -11.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 56.9k $1.4m | Reduced -1.6m |
| Walleye Capital LLC 0.01% of their portfolio | 54.0k $1.3m | Unchanged |
| SEVEN GRAND MANAGERS, LLC 0.05% of their portfolio | 50.0k $1.2m | Reduced -100.0k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 47.2k $1.2m | New |
| Daiwa Securities Group Inc. 0.00% of their portfolio | 46.6k $1.1m | Reduced -576.2k |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio | 45.7k $1.1m | Added +33.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 41.3k $1.0m | New |
| Canal Insurance CO 0.22% of their portfolio | 40.0k $985.0k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 37.6k $925.0k | Reduced -731 |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 37.0k $909.8k | Reduced -585.9k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 36.8k $816.7k | New |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 36.5k $899.6k | New |
| MOODY NATIONAL BANK TRUST DIVISION 0.07% of their portfolio | 35.9k $882.7k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 34.7k $857.2k | Added +5.2k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 32.5k $800.5k | New |
| Cetera Investment Advisers 0.00% of their portfolio | 31.5k $776.1k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 29.9k $736.9k | Added +26.1k |
| LPL Financial LLC 0.00% of their portfolio | 28.3k $696.3k | Added +15.5k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 27.8k $685.4k | New |
| ROYCE & ASSOCIATES LP 0.01% of their portfolio | 27.5k $677.3k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 27.3k $671.7k | Reduced -920.6k |
| FRED ALGER MANAGEMENT, LLC 0.00% of their portfolio | 26.9k $662.3k | Reduced -41.9k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.00% of their portfolio | 26.3k $646.7k | Reduced -492.1k |
| Longaeva Partners L.P. 0.02% of their portfolio | 25.3k $623.6k | Reduced -184.7k |
| CITIGROUP INC 0.00% of their portfolio | 25.1k $617.2k | Added +23.6k |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 24.5k $603.4k | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 23.5k $577.6k | Added +10.9k |
| TUDOR INVESTMENT CORP ET AL 0.00% of their portfolio | 23.0k $566.4k | Added +8.7k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 22.2k $546.4k | Added +6.7k |
| Hilltop Holdings Inc. 0.04% of their portfolio | 19.3k $474.5k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 19.0k $468.2k | Added +7.6k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.00% of their portfolio | 18.3k $449.0k | Reduced -4.0k |
| GAMCO INVESTORS, INC. ET AL 0.00% of their portfolio | 17.3k $425.2k | Reduced -576 |
| Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio | 16.8k $414.0k | New |
| Brevan Howard Capital Management LP 0.01% of their portfolio | 16.2k $399.8k | Reduced -92.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 15.7k $387.0k | Added +3.1k |
| Denver PWM, LLC 0.05% of their portfolio | 15.0k $163.9k | New |
| GABELLI FUNDS LLC 0.00% of their portfolio | 14.9k $366.9k | Reduced -668 |
| Pathstone Holdings, LLC 0.00% of their portfolio | 14.6k $360.1k | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 14.2k $350.0k | New |