Archimedes Tech SPAC Partners II Co. Ordinary Shares (ATII) Stock: Price, Insider Activity & Smart Money | Midas Edge

ATII

Archimedes Tech SPAC Partners II Co. Ordinary Shares

NASDAQ

$9.81+36.82%

Close Oct 21, 2026

Price history and reported events

1Y price return -5.2%

Prices adjusted for splits; dividends excluded.

About the chart and event marks

Oct 21, 2025–Oct 21, 2026. Returns are rebased to the first displayed observation. Prices use the latest stored close's share basis, linked backward through stored price returns. Marks use their recorded calendar dates, including non-trading days; their lanes do not imply a price or that an event caused a move.

Insiders: green purchases, red sales. Other lanes: 13F reporting period ends, stored earnings-calendar dates and flagged filings. Select a mark or open the dated list for its evidence.

Dated events · 5

Link an account to see your stake, watchlist and past holdings.

What Midas sees

Reported evidence, not a forecast

Smart Money · Holder IQ

70.3 / 100

Above median holder quality (percentile 84.6 this quarter). Tracked high-scoring holders are reducing shares.

Full read

Insiders · reported activity

None recorded

No stored transaction records were returned for this filing window. Last 180 days of filings: 0 purchases, 0 sales.

Full read

Active filing flags

0 flags

No active flags are recorded; this is not an all-clear.

Full read

Reading stored signals…

Financial Services • Shell Companies

Add to watchlist Create alert Open filings

Insider Activity

Track CEO, CFO, and director trades

Why it matters

Unlock details

Smart Money

Holder IQ: medium

Q2 2026, filed Oct 29, 2026

Why it matters

Unlock details

Red Flags

No red flags detected

Unlock details

1 month: -8.3%
3 months: -8.3%
1 year: —
52-week range: $7.17
$11.38

More market facts

Dividend: No dividends on record
Short interest: 0.0% of float6.5K shares · settled Oct 15, 2026 · -63.1% since Sep 30, 2026 · FINRA

End-of-day close from stored market data, not a live quote.

About Archimedes Tech SPAC Partners II Co. Ordinary Shares

As of October 21, 2026, Archimedes Tech SPAC Partners II Co. was acquired by Forge Nano, Inc., in a reverse merger transaction. Archimedes Tech SPAC Partners II Co. does not have significant operations. It intends to effect a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization, or other similar business combination with one or more businesses in the technology industry.

Archimedes Tech SPAC Partners II Co. was incorporated in 2024 and is based in Claymont, Delaware.

Website: archimedesspac2.com
Headquarters: Claymont, DE, United States
Listed: Apr 3, 2025
Fiscal year ends: December

Company profile stored Oct 29, 2026.

Quarterly results

The last 8 fiscal quarters from the latest stored normalized financial statements. These may include restatements. Year over year compares the same quarter a year earlier.

Quarter	Revenue	YoY	Net income
Jun 2026filed Aug 13, 2026	—	—	-$136.8M
Mar 2026filed May 14, 2026	—	—	$1.7M
Dec 2025filed Mar 4, 2026	—	—	$2.1M
Sep 2025filed Nov 7, 2025	—	—	$2.4M
Jun 2025filed Aug 8, 2025	—	—	$2.4M
Mar 2025filed May 14, 2025	—	—	$1.2M
Dec 2024filed Dec 31, 2024	—	—	-$23.0
Sep 2024filed Sep 30, 2024	—	—	-$55.7

Fiscal years · last 2

Fiscal year	Revenue	YoY	Net income
Dec 2025filed Mar 4, 2026	—	—	$8.0M
Dec 2024filed Dec 31, 2024	—	—	-$78.7

Short-interest history

Reported short positions, stored float percentages and adjusted prices over the same period.

Shares short

Share of float

Adjusted close · USD

Dates mark FINRA settlements.

Settlement records · 37 observations

Settlement Oct 15, 2026
6,493 shares short
-11,111 shares (-63.1%) vs Sep 30, 2026
0% of the stored float. Published Oct 26, 2026.
Settlement Sep 30, 2026
17,604 shares short
-7,239 shares (-29.1%) vs Sep 15, 2026
0.1% of the stored float. Published Oct 9, 2026.
Settlement Sep 15, 2026
24,843 shares short
-22,609 shares (-47.6%) vs Aug 31, 2026
0.1% of the stored float. Published Sep 24, 2026.
Settlement Aug 31, 2026
47,452 shares short
-8,480 shares (-15.2%) vs Aug 14, 2026
Published Sep 10, 2026.
Settlement Aug 14, 2026
55,932 shares short
+32,903 shares (+142.9%) vs Jul 31, 2026
Published Aug 25, 2026.
Settlement Jul 31, 2026
23,029 shares short
-2,348 shares (-9.3%) vs Jul 15, 2026
Published Aug 11, 2026.
Settlement Jul 15, 2026
25,377 shares short
-10,721 shares (-29.7%) vs Jun 30, 2026
Published Jul 24, 2026.
Settlement Jun 30, 2026
36,098 shares short
+6,350 shares (+21.3%) vs Jun 15, 2026
Published Jul 10, 2026.
Settlement Jun 15, 2026
29,748 shares short
-3,638 shares (-10.9%) vs May 29, 2026
Published Jun 25, 2026.
Settlement May 29, 2026
33,386 shares short
-21,583 shares (-39.3%) vs May 15, 2026
Published Jun 9, 2026.
Settlement May 15, 2026
54,969 shares short
+46,282 shares (+532.8%) vs Apr 30, 2026
Published May 27, 2026.
Settlement Apr 30, 2026
8,687 shares short
+6,731 shares (+344.1%) vs Apr 15, 2026
Published May 11, 2026.
Settlement Apr 15, 2026
1,956 shares short
-107 shares (-5.2%) vs Mar 31, 2026
Published Apr 24, 2026.
Settlement Mar 31, 2026
2,063 shares short
-379 shares (-15.5%) vs Mar 13, 2026
Published Apr 10, 2026.
Settlement Mar 13, 2026
2,442 shares short
-3,815 shares (-61%) vs Feb 27, 2026
Published Mar 24, 2026.
Settlement Feb 27, 2026
6,257 shares short
-2,634 shares (-29.6%) vs Feb 13, 2026
Published Mar 10, 2026.
Settlement Feb 13, 2026
8,891 shares short
+2,866 shares (+47.6%) vs Jan 30, 2026
Published Feb 25, 2026.
Settlement Jan 30, 2026
6,025 shares short
+2,309 shares (+62.1%) vs Jan 15, 2026
Published Feb 10, 2026.
Settlement Jan 15, 2026
3,716 shares short
+2,388 shares (+179.8%) vs Dec 31, 2025
Published Jan 27, 2026.
Settlement Dec 31, 2025
1,328 shares short
-26,017 shares (-95.1%) vs Dec 15, 2025
Published Jan 12, 2026.
Settlement Dec 15, 2025
27,345 shares short
+8,294 shares (+43.5%) vs Nov 28, 2025
Published Dec 24, 2025.
Settlement Nov 28, 2025
19,051 shares short
+578 shares (+3.1%) vs Nov 14, 2025
Published Dec 9, 2025.
Settlement Nov 14, 2025
18,473 shares short
-5,876 shares (-24.1%) vs Oct 31, 2025
Published Nov 25, 2025.
Settlement Oct 31, 2025
24,349 shares short
+5,633 shares (+30.1%) vs Oct 15, 2025
Published Nov 11, 2025.
Settlement Oct 15, 2025
18,716 shares short
-231 shares (-1.2%) vs Sep 30, 2025
Published Oct 24, 2025.
Settlement Sep 30, 2025
18,947 shares short
-92 shares (-0.5%) vs Sep 15, 2025
Published Oct 9, 2025.
Settlement Sep 15, 2025
19,039 shares short
-66 shares (-0.3%) vs Aug 29, 2025
Published Sep 24, 2025.
Settlement Aug 29, 2025
19,105 shares short
-3,194 shares (-14.3%) vs Aug 15, 2025
Published Sep 10, 2025.
Settlement Aug 15, 2025
22,299 shares short
-4,305 shares (-16.2%) vs Jul 31, 2025
Published Aug 26, 2025.
Settlement Jul 31, 2025
26,604 shares short
+4,550 shares (+20.6%) vs Jul 15, 2025
Published Aug 11, 2025.
Settlement Jul 15, 2025
22,054 shares short
+1,968 shares (+9.8%) vs Jun 30, 2025
Published Jul 24, 2025.
Settlement Jun 30, 2025
20,086 shares short
+346 shares (+1.8%) vs Jun 13, 2025
Published Jul 10, 2025.
Settlement Jun 13, 2025
19,740 shares short
-1,960 shares (-9%) vs May 30, 2025
Published Jun 25, 2025.
Settlement May 30, 2025
21,700 shares short
+437 shares (+2.1%) vs May 15, 2025
Published Jun 10, 2025.
Settlement May 15, 2025
21,263 shares short
+1,221 shares (+6.1%) vs Apr 30, 2025
Published May 27, 2025.
Settlement Apr 30, 2025
20,042 shares short
+19,864 shares (+11,159.6%) vs Apr 15, 2025
Published May 9, 2025.
Settlement Apr 15, 2025
178 shares short
Published Apr 25, 2025.

Change = this settlement’s shares short − the previous recorded settlement’s shares short; percentage change divides by that earlier count. A zero earlier count has no percentage change. Split-spanning counts are left uncompared. Float percentages use the stored settlement observation, not today’s float.

Source: stored FINRA equity short-interest records. Adjusted prices exclude a reused ticker’s earlier issuer. FINRA data and reporting dates · How to read short interest

Portfolio context

Link an account to see your stake, watchlist and past holdings.

We’ll show you if ATII is in your portfolio and how much it contributes.

Market context

Smart money context

Holder IQ: MEDIUM

11 smart-money holders: institutions with a high Holder IQ

Q2 2026, filed Oct 29, 2026

Smart-money 13F trend: unchanged (light)

Unlock crowding heatmap Unlock filer discovery

Red flags

Red flags: 0

Largest 13-F holders · Q2 2026

52 filers reported a long position in ATII for Q2 2026. 13-F holdings are filed up to 45 days after the quarter ends.

The top 10 hold

55.5%

of the 17.6M shares 13-F filers reported

Moves vs Q1 2026

0 added3 trimmed

3 new · 4 unchanged

Net shares held

-4%

across the 7 holders with a comparable Q1 2026 book

Rank	Holder	Value	Shares	Shares vs Q1 2026
1	TENOR CAPITAL MANAGEMENT Co., L.P.	$14.7M · 1.4M shares	1.4M	-8.8%
2	Fort Baker Capital Management LP	$14.3M · 1.3M shares	1.3M	New
3	Magnetar Financial LLC	$14M · 1.3M shares	1.3M	-0.2%
4	D. E. Shaw & Co., Inc.	$12.3M · 1.1M shares	1.1M	Unchanged
5	Decagon Asset Management LLP	$10.1M · 937.8K shares	937.8K	New
6	Linden Advisors LP	$9.1M · 848.3K shares	848.3K	-15.2%
7	Ghisallo Capital Management LLC	$8.6M · 800K shares	800K	Unchanged
8	Two Sigma Investments, LP	$7.8M · 725K shares	725K	Unchanged
9	Hudson Bay Capital Management LP	$7.5M · 700K shares	700K	Unchanged
10	Shay Capital LLC	$6.7M · 623.7K shares	623.7K	New

Sign in to see each holder’s Holder IQ, factor-adjusted Holder IQ and rank, and compare these holders with all scored filers. Available on every plan.

Filings

5% holder filings (13D / 13G)

Holders of more than 5% of ATII file with the SEC within days. A 13D holder may seek to influence the company; a 13G holder is passive. Each holder’s latest filing from the last three years.

Filed	Holder	% of class
Nov 9, 2026	Goldman Sachs Group Inc13G · passive	6.4%

Moves the factor model did not explain

How much of ATII’s move accompanied the market and its measured style leanings, and how much was left? The residual is unexplained by this fitted model. It does not establish a cause, skill or future alpha.

Return split unavailable. A complete, reconciled model for every market session in this window is unavailable. Missing dates are not filled.

Link an account with dated transactions to see what share of your own holding’s move since its purchase-date close was unexplained, with long and short positions distinguished. Your private holdings never enter this public chart.

Dated model observations (4)

Daily percentage returns, not window contributions. Source: the same dated warehouse rows and model v1.2.0; observed 2026-11-13T17:07:53.319Z. Absent sessions are never interpolated; missing or failed inputs stay unavailable.

ATII dated stock, market, style and residual returns
Date	Stock	Market	Styles	Residual
2026-10-16	Unavailable	Unavailable	Unavailable	Unavailable
2026-10-19	Unavailable	Unavailable	Unavailable	Unavailable
2026-10-20	Unavailable	Unavailable	Unavailable	Unavailable
2026-10-21	Unavailable	Unavailable	Unavailable	Unavailable

How this split is calculated

Each day uses that day’s fitted market intercept and style exposures multiplied by that day’s published factor returns. Their sum plus the independently stored residual must reconcile to the stock return. Window effects are weighted by stock wealth at each day’s start and added; the stock return compounds. Every expected US market session must be present and pass source, identity, model and numerical checks. This retrospective fit is an explanation of measured returns, not evidence of causation or an investable forecast. The window ends at the latest published model session, which can lag the market; today’s unfinished session is excluded.

What insiders reported owning

Read the balances behind the trades: SEC Forms 3, 4 and 5 state a reporting owner’s position, not just an amount bought or sold. These are dated filing observations, not current holdings or a trading signal.

Ownership history unavailable. No identity-bound filing ownership observations are available.

Link an account to see your stake, watchlist and past holdings. A reported balance adds context to a sale or purchase: an insider may still report a substantial position. This view does not calculate a percentage sold or a combined insider total. Different classes, indirect vehicles, derivatives and joint filers may overlap; changes can also reflect awards, gifts, exercises, splits or corrections. Neither a balance nor a change predicts your return.

Available filings through Nov 13, 2026; read Nov 13, 2026, 5:07 PM UTC. Latest 240 stored rows, up to 24 distinct reporting-owner positions. The stored sample need not be a complete ownership history. No holdings or account data about the reader enters this public evidence.

What insiders reported owning

Reading dated filing evidence…

Get the Full Analysis for ATII

Unlock detailed insider transactions, institutional holder changes, factor exposures, and personalized alerts. Start free with your own portfolio.

Start Free Analysis Try Portfolio Roast

Largest companies in Financial Services

BRK-A · Berkshire Hathaway Inc BRK-B · Berkshire Hathaway Inc JPM · JPMorgan Chase & Co V · Visa Inc. Class A MA · Mastercard Inc BAC · Bank of America Corp HSBC · HSBC Holdings PLC ADR MS · Morgan Stanley