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YSS · York Space Systems Inc. · Holdings

Track YSS — free
$5.94 +0.21 (+3.66%)
Market Cap
$811.78M
Shares
137.36M
Volume · Oct 21 795.59K Avg daily vol (3M) 3.06M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 165
Total Value: $1,614,258,466
Total Shares: 66,464,325
Showing 1–100 of 174 holdings by value · page 1 of 2

Institutional Ownership Trend

3 quarters

Holder Concentration

Across 165 13F filers
Top Holder
28.6%
Mar 2026 → Jun 2026 · range 28.6% – 30.3%
of institutional value
Top 5
56.0%
Mar 2026 → Jun 2026 · range 56.0% – 57.4%
of institutional value
Top 10
68.1%
Mar 2026 → Jun 2026 · range 66.2% – 68.1%
of institutional value
HHI
1,219
Mar 2026 → Jun 2026 · range 1,219 – 1,311
Broadly held

Who Holds YSS

Last 3 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 162 filers, like-for-like change +4.5%; actively managed books +8.7%; index-like books 0.0%.

Holder type Share Filers Change
Registered adviser 45.7% 79 +5.7%
Exempt adviser 0.1% 3 -78.5%
Adviser 3.2% 5 +1.7%
Bank 6.3% 15 +16.1%
Broker-dealer 0.1% 2 +132.9%
Benefit plan 0.1% 4 +13.5%
Non-US 0.7% 5 -15.7%
Holding company 33.5% 9 -1.0%
Unknown 10.4% 40 +18.7%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

162 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
2
1.23% of filers hold it in their top 10
Mar 31, 2026: 2
Holders above 5%
1
median weight 0.001%
Mar 31, 2026: 1
Crowding
14.8%
of shares outstanding, 43rd percentile
Private-fund advisers
14.6%
of shares outstanding
Institutional ownership
50.1%
93.9% of the estimated free float
Top 10 holders
70.3%
of 13F shares, Herfindahl 0.129
Active holders
+8.7%
like-for-like share change of active filers
5% stakes on record
3
0 13D, 3 13G (0 institutional, 0 passive, 3 exempt)
How long holders have held it value-weighted 1.9 quarters
Under 1 year 100.0% 1 to 3 years 0.000% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net sellers of $3,103,903 (0 buying, 1 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$25.93
estimated per share
Mar 31, 2026: $24.25
Quarter-end price
$24.62
implied by 13F values
Estimated gain or loss
-5.1%
price against the estimated cost
Estimated at a loss
34.1%
of costed 13F value

Estimated cost covers 97.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies YSS's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 ARXS Arxis, Inc. 3
2 ALHC Alignment Healthcare, Inc. 3
3 RDW Redwire Corp 3
4 LPTH Lightpath Technologies Inc 3
5 IMNM Immunome Inc. 3
6 WBI WaterBridge Infrastructure LLC 3
7 XE X-Energy, Inc. 3
8 CELC Celcuity Inc. 3
9 KRMN Karman Holdings Inc. 3
10 LASR Nlight, Inc. 3

Shareholder Targets

13F filers that own its peers but not YSS, quarter ended Jun 30, 2026

Found through its holder-overlap peers: ARXS, ALHC, RDW, LPTH, IMNM, WBI, XE, CELC, KRMN, LASR, LTH, BBIO, FPS, CGNX, AVAV, APG, NRG, AXON, SPOT, WMB. 2,999 filers in all.

# Filer In peers
1 BAILLIE GIFFORD & CO Adviser, Diversified active $5,515,065,350 3 held
2 Jupiter Topco LLC Unknown, Diversified active $3,950,105,279 18 held
3 FRANKLIN RESOURCES INC Adviser, Diversified active $3,574,048,844 17 held
4 T. Rowe Price Investment Management, Inc. Adviser, Diversified active $2,092,691,255 9 held
5 DIMENSIONAL FUND ADVISORS LP Registered adviser, Diversified active $2,061,711,578 15 held
6 COATUE MANAGEMENT LLC Registered adviser, Concentrated $1,746,957,943 2 held
7 Pictet Asset Management Holding SA Unknown, Diversified active $1,738,498,212 16 held
8 JENNISON ASSOCIATES LLC Registered adviser, Diversified active $1,711,525,039 9 held
9 Amundi Holding company, Index-like $1,661,486,488 15 held
10 BAMCO INC /NY/ Registered adviser, Concentrated $1,651,876,891 7 held

Fund Ownership of YSS by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 3.14% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.44% 599,138
Index ETFs 2.70% 3,707,972
Active ETFs 0.03% 42,020
Active funds 4.50% 6,180,085
Unclassified 1.72% 2,366,947
All registered funds 9.39% 12,896,162
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Showing 100 of 174
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 174 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 2086587 CUSIP 987084100 13F (30d) 19 filings 19 filers Visit website Investor relations