HowShorted

How shorted is Castellum Aktiebolag?

More shorted than 74% of the 110 Swedish companies with disclosed positions

2.39%
of share capital in disclosed short positions · 25 Aug 2026
5-day change
+0.60
20-day change
+0.58
Aggregate net short position time series for Castellum Aktiebolag
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Who is short Castellum Aktiebolag?

Position holderPositionSince
Arrowstreet Capital Limited Partnership1.10%14 Jul 2026
Citadel Advisors LLC0.69%6 Aug 2026
MILLENNIUM INTERNATIONAL MANAGEMENT LP0.60%24 Aug 2026

Named positions of 0.5%+ as published by the Finansinspektionen. The dates shown are each holder's latest disclosure date.

History

Position dateShort %Change
25 Aug 20262.39%0.00
24 Aug 20262.39%ʳ+0.09
21 Aug 20262.30%0.00
20 Aug 20262.30%0.00
19 Aug 20262.30%ʳ+0.51
18 Aug 20261.79%0.00
17 Aug 20261.79%0.00
14 Aug 20261.79%0.00
13 Aug 20261.79%0.00
12 Aug 20261.79%0.00
11 Aug 20261.79%0.00
10 Aug 20261.79%0.00
7 Aug 20261.79%0.00
6 Aug 20261.79%−0.02
5 Aug 20261.81%0.00
4 Aug 20261.81%0.00
3 Aug 20261.81%0.00
31 Jul 20261.81%0.00
30 Jul 20261.81%0.00
29 Jul 20261.81%0.00
28 Jul 20261.81%0.00
27 Jul 20261.81%0.00
24 Jul 20261.81%0.00
23 Jul 20261.81%0.00
22 Jul 20261.81%0.00
21 Jul 20261.81%0.00
20 Jul 20261.81%0.00
17 Jul 20261.81%0.00
16 Jul 20261.81%0.00
15 Jul 20261.81%ʳ0.00
14 Jul 20261.81%ʳ+0.01
13 Jul 20261.80%ʳ0.00
10 Jul 20261.80%ʳ0.00
9 Jul 20261.80%ʳ0.00
8 Jul 20261.80%ʳ0.00
7 Jul 20261.80%ʳ0.00
6 Jul 20261.80%ʳ−0.01
3 Jul 20261.81%ʳ0.00
2 Jul 20261.81%ʳ0.00
1 Jul 20261.81%ʳ−0.50
30 Jun 20262.31%ʳ0.00
29 Jun 20262.31%ʳ−0.59
26 Jun 20262.90%ʳ0.00
25 Jun 20262.90%ʳ0.00
24 Jun 20262.90%ʳ−0.05
23 Jun 20262.95%ʳ+0.11
22 Jun 20262.84%ʳ0.00
19 Jun 20262.84%ʳ0.00
18 Jun 20262.84%ʳ−0.07
17 Jun 20262.91%ʳ0.00
16 Jun 20262.91%ʳ0.00
15 Jun 20262.91%ʳ+0.11
12 Jun 20262.80%ʳ0.00
11 Jun 20262.80%ʳ0.00
10 Jun 20262.80%ʳ0.00
9 Jun 20262.80%ʳ0.00
8 Jun 20262.80%ʳ+0.05
5 Jun 20262.75%ʳ0.00
4 Jun 20262.75%ʳ+0.09
3 Jun 20262.66%ʳ+0.01
2 Jun 20262.65%ʳ0.00
1 Jun 20262.65%ʳ−0.01
29 May 20262.66%ʳ−0.06
28 May 20262.72%ʳ0.00
27 May 20262.72%ʳ+0.11
26 May 20262.61%ʳ0.00
25 May 20262.61%ʳ0.00
22 May 20262.61%ʳ0.00
21 May 20262.61%ʳ0.00
20 May 20262.61%ʳ0.00
19 May 20262.61%ʳ0.00
18 May 20262.61%ʳ0.00
15 May 20262.61%ʳ+0.51
14 May 20262.10%ʳ0.00
13 May 20262.10%ʳ+0.50
12 May 20261.60%ʳ0.00
11 May 20261.60%ʳ+0.02
8 May 20261.58%ʳ0.00
7 May 20261.58%ʳ0.00
6 May 20261.58%ʳ0.00
5 May 20261.58%ʳ0.00
4 May 20261.58%ʳ0.00
1 May 20261.58%ʳ0.00
30 Apr 20261.58%ʳ−3.95
29 Apr 20265.53%ʳ0.00
28 Apr 20265.53%ʳ+0.50
27 Apr 20265.03%ʳ+3.45
24 Apr 20261.58%ʳ0.00
23 Apr 20261.58%ʳ0.00
22 Apr 20261.58%ʳ+0.50
21 Apr 20261.08%ʳ0.00
20 Apr 20261.08%ʳ0.00
17 Apr 20261.08%ʳ0.00
16 Apr 20261.08%ʳ−0.53
15 Apr 20261.61%ʳ0.00
14 Apr 20261.61%ʳ0.00
13 Apr 20261.61%ʳ0.00
10 Apr 20261.61%ʳ0.00
9 Apr 20261.61%ʳ0.00
8 Apr 20261.61%ʳ0.00
7 Apr 20261.61%ʳ0.00
6 Apr 20261.61%ʳ0.00
3 Apr 20261.61%ʳ0.00
2 Apr 20261.61%ʳ0.00
1 Apr 20261.61%ʳ0.00
31 Mar 20261.61%ʳ0.00
30 Mar 20261.61%ʳ0.00
27 Mar 20261.61%ʳ0.00
26 Mar 20261.61%ʳ0.00
25 Mar 20261.61%ʳ0.00
24 Mar 20261.61%ʳ0.00
23 Mar 20261.61%ʳ0.00
20 Mar 20261.61%ʳ+0.51
19 Mar 20261.10%ʳ0.00
18 Mar 20261.10%ʳ0.00
17 Mar 20261.10%ʳ0.00
16 Mar 20261.10%ʳ0.00
13 Mar 20261.10%ʳ0.00
12 Mar 20261.10%ʳ0.00
11 Mar 20261.10%ʳ0.00
10 Mar 20261.10%ʳ0.00
9 Mar 20261.10%ʳ0.00
6 Mar 20261.10%ʳ0.00
5 Mar 20261.10%ʳ0.00
4 Mar 20261.10%ʳ0.00
3 Mar 20261.10%ʳ0.00
2 Mar 20261.10%ʳ0.00
27 Feb 20261.10%ʳ0.00
26 Feb 20261.10%ʳ0.00
25 Feb 20261.10%ʳ0.00
24 Feb 20261.10%ʳ0.00
23 Feb 20261.10%ʳ0.00
20 Feb 20261.10%ʳ0.00
19 Feb 20261.10%ʳ0.00
18 Feb 20261.10%ʳ0.00
17 Feb 20261.10%ʳ0.00
16 Feb 20261.10%ʳ0.00
13 Feb 20261.10%ʳ0.00
12 Feb 20261.10%ʳ0.00
11 Feb 20261.10%ʳ0.00
10 Feb 20261.10%ʳ0.00
9 Feb 20261.10%ʳ0.00
6 Feb 20261.10%ʳ0.00
5 Feb 20261.10%ʳ0.00
4 Feb 20261.10%ʳ0.00
3 Feb 20261.10%ʳ0.00
2 Feb 20261.10%ʳ0.00
30 Jan 20261.10%ʳ0.00
29 Jan 20261.10%ʳ0.00
28 Jan 20261.10%ʳ0.00
27 Jan 20261.10%ʳ0.00
26 Jan 20261.10%ʳ0.00
23 Jan 20261.10%ʳ0.00
22 Jan 20261.10%ʳ0.00
21 Jan 20261.10%ʳ0.00
20 Jan 20261.10%ʳ0.00
19 Jan 20261.10%ʳ0.00
16 Jan 20261.10%ʳ0.00
15 Jan 20261.10%ʳ0.00
14 Jan 20261.10%ʳ0.00
13 Jan 20261.10%ʳ–

ʳ figure revised after a register re-read. See how revisions work.

About this data

ISIN
SE0000379190
Regulator
Finansinspektionen (Sweden)
First seen in dataset
13 Jan 2026

We show regulatory short-position data only: no prices, no valuations, no recommendations.

Frequently asked questions

How shorted is Castellum Aktiebolag right now?
Disclosed net short positions total 2.39% of Castellum Aktiebolag's share capital as of 25 Aug 2026, per the Finansinspektionen's public register.
Who is shorting Castellum Aktiebolag?
The Finansinspektionen names each holder of a position of 0.5% or more. Currently disclosed: Arrowstreet Capital Limited Partnership, Citadel Advisors LLC, MILLENNIUM INTERNATIONAL MANAGEMENT LP.
What does this number include?
The sum of individually disclosed net short positions of 0.5% or more of share capital. Positions between 0.1% and 0.5% are reported to the regulator privately and are not public, so the true total can be higher.
How often is this updated?
Position holders must disclose changes by the next trading day; we refresh from the Finansinspektionen's register every trading day.