Archimedes Tech SPAC Partners II Ownership | Who Owns Archimedes Tech SPAC Partners II?

Archimedes Tech SPAC Partners II Ownership Summary

Archimedes Tech SPAC Partners II is owned by 109.34% institutional investors, 23.31% insiders. Tenor capital management is the largest institutional shareholder, holding 7.39% of ATII shares. Westchester Merger Arbitrage Composite is the top mutual fund, with 2.67% of its assets in Archimedes Tech SPAC Partners II shares.

ATII Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Archimedes Tech SPAC Partners II	109.34%	23.31%	-32.65%
Industry	Shell Companies Stocks	2846.75%	20.27%	-2767.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Tenor capital management	1.50M	7.39%	$15.62M
Magnetar financial	1.30M	6.41%	$13.57M
D. e. shaw	1.14M	5.61%	$11.90M
Linden advisors lp	1.00M	4.93%	$10.44M
Aqr arbitrage	920.67K	4.54%	$9.58M
Westchester capital management	907.14K	4.47%	$9.44M
Lmr partners llp	850.00K	4.19%	$8.85M
Ghisallo capital management	800.00K	3.94%	$8.35M
Governors lane lp	759.56K	3.74%	$7.93M
Alberta investment management	750.00K	3.70%	$7.84M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Rlh capital	400.91K	2.13%	$4.18M
Gritstone asset management	99.08K	1.10%	$1.03M
Quarry lp	285.00K	0.53%	$2.97M
Radcliffe capital management	661.34K	0.52%	$6.90M
Governors lane lp	759.56K	0.51%	$7.93M
Westchester capital management	907.14K	0.43%	$9.44M
Periscope capital	352.88K	0.41%	$3.68M
Mint tower capital management b.v.	300.00K	0.28%	$3.12M
Ubs oconnor	200.00K	0.24%	$2.07M
Tenor capital management	1.50M	0.24%	$15.62M

Top Buyers

Holder	Shares	% Assets	Change
Toronto dominion bank	650.00K	0.01%	500.00K
Rlh capital	400.91K	2.13%	400.91K
J. goldman & co lp	369.78K	0.11%	369.78K
Quarry lp	285.00K	0.53%	285.00K
Clear street group	77.45K	0.00%	73.26K

Top Sellers

Holder	Shares	% Assets	Change
Driehaus capital management	-	-	-573.08K
Meteora capital	295.61K	0.23%	-422.82K
Mizuho securities usa	19.47K	0.00%	-284.36K
Wolverine asset management	134.28K	0.01%	-221.07K
Glazer capital	750.00K	0.17%	-114.30K

New Positions

Holder	Shares	% Assets	Change	Value
Rlh capital	400.91K	2.13%	400.91K	$4.18M
J. goldman & co lp	369.78K	0.11%	369.78K	$3.85M
Quarry lp	285.00K	0.53%	285.00K	$2.97M
Virtu financial	53.69K	0.02%	53.69K	$561.00K
Bnp paribas arbitrage, snc	37.74K	0.00%	37.74K	$392.92K

Sold Out

Holder	Change
Warberg asset management	-10.00K
Stonex group	-50.61K
Driehaus capital management	-573.08K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	54	10.20%	22,185,740	-0.27%	109	1.17%	15	7.14%	10	11.11%
Dec 31, 2025	10	-78.72%	2,905,829	-86.80%	12	0.23%	1	-90.00%	3	-70.00%
Sep 30, 2025	10	-76.74%	3,123,039	-85.22%	10	0.21%	3	-92.86%	2	-
Jun 30, 2025	37	-	16,833,733	-	288	-	36	-	-	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Westchester Merger Arbitrage Composite	789.86K	2.67%	789.86K
The Merger Fund A	789.86K	2.67%	5.89K
PICTON Arbitrage Plus Alternative Fund F	411.50K	1.39%	-
RiverNorth Opportunities	90.00K	0.30%	90.00K
JNL Multi-Manager Alternative A	43.42K	0.15%	-
AQR Corp Abtg IAU1F USD Acc	37.74K	0.13%	-
PICTON Arbitrage Alternative Fund F	27.70K	0.09%	-
Accelerate Arbitrage ETF	25.83K	0.09%	-
Westchester Event Driven Composite	25.82K	0.09%	25.82K
Virtus Westchester Event-Driven Fd I	25.82K	0.09%	314.00

ATII Ownership FAQ

Who Owns Archimedes Tech SPAC Partners II?

Archimedes Tech SPAC Partners II shareholders are primarily institutional investors at 109.34%, followed by 23.31% insiders and -32.65% retail investors. The average institutional ownership in Archimedes Tech SPAC Partners II's industry, Shell Companies Stocks , is 2846.75%, which Archimedes Tech SPAC Partners II falls below.

Who owns the most shares of Archimedes Tech SPAC Partners II?

Archimedes Tech SPAC Partners II’s largest shareholders are Tenor capital management (1.5M shares, 7.39%), Magnetar financial (1.3M shares, 6.41%), and D. e. shaw (1.14M shares, 5.61%). Together, they hold 19.41% of Archimedes Tech SPAC Partners II’s total shares outstanding.

Does Blackrock own Archimedes Tech SPAC Partners II?

BlackRock is not among the top 10 institutional shareholders of Archimedes Tech SPAC Partners II.

Who is Archimedes Tech SPAC Partners II’s biggest shareholder by percentage of total assets invested?

Rlh capital is Archimedes Tech SPAC Partners II’s biggest shareholder by percentage of total assets invested, with 2.13% of its assets in 400.91K Archimedes Tech SPAC Partners II shares, valued at 4.18M$.

Who is the top mutual fund holder of Archimedes Tech SPAC Partners II shares?

Westchester Merger Arbitrage Composite is the top mutual fund holder of Archimedes Tech SPAC Partners II shares, with 2.67% of its total shares outstanding invested in 789.86K Archimedes Tech SPAC Partners II shares.

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