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X4 Pharmaceuticals, Inc

XFOR Net buying
CIK 0001501697 #3276 in the set updated 18 Sep 2026
Bought (120 mo)
$33.50M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$3.08M
$456.27K on a plan · $0.00 straight out of an exercise
Sold at will
$2.63M
97 of 103 sales
Net
+$30.42M
+$30.87M against sales at will

By person

37 insiders · 126 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
GORDON CARL L
Director
$5.00M (1)
+$5.00M
1,868,966
$8.31M
MCGUIRE TERRANCE
Director
$5.00M (4)
+$5.00M
1,821,460
$8.10M
Polaris Venture Management Co. V, L.L.C. entity
10% owner
$5.00M (4)
+$5.00M
1,821,460
$8.10M
Ross Michael Jay
Director
$5.00M (2)
+$5.00M
1,868,961
$8.31M
SVLSF V, LLC entity
10% owner
$5.00M (2)
+$5.00M
1,868,961
$8.31M
NeoMed Innovation V L.P.
10% owner
$3.00M (1)
+$3.00M
867,639
$3.86M
Nessi Claudio
Director
$3.00M (1)
+$3.00M
867,639
$3.86M
Gerngross Tillman U.
Director
$2.00M (1)
+$2.00M
392,821
$1.75M
+283.1%
Ragan Paula
President and CEO
$1.25M (40)
−$1.25M
3,337,386
$14.83M
Mostafa Adam S.
Chief Financial Officer
$746.41K (21)
−$746.41K
850,000
$3.78M
EMBL Technology Fund II GmbH & Co. KG entity
10% owner
$200.00K (1)
+$200.00K
370,454
$1.65M
Meisner Derek M
Chief Legal Officer
$171.41K (8)
−$171.41K
145,155
$645.14K
DiBiase Mary
Chief Operating Officer
$143.94K (17)
−$143.94K
1,140,980
$5.07M
+1,777%
Stewart Murray
Director
$137.86K (1)
−$137.86K
7,883
$35.04K
Taveras Arthur
Chief Scientific Officer
$121.05K (6)
−$121.05K
388,026
$1.72M
KIRSKE DAVID
Chief Financial Officer
$109.25K (2)
−$109.25K
167,750
$745.56K
Volpone John
President
$109.23K (1)
−$109.23K
265,305
$1.18M
Skerlj Renato
Chief Scientific Officer
$46.96K (1)
−$46.96K
42,076
$187.01K
+38.4%
Craig Adam R
Executive Chairman
$250.00K (1)
$210.83K (1)
+$39.17K
328,651
$1.46M
WYZGA MICHAEL S
Director
$29.88K (1)
+$29.88K
5,555
$24.69K
Baldry Mark
Chief Commercial Officer
$21.81K (3)
$27.23K (3)
−$5.42K
25,337
$112.61K
Arbet-Engels Christophe
Chief Medical Officer
$5.28K (1)
−$5.28K
864,207
$3.84M
Cadavid Diego
Chief Medical Officer
(1)
$0.00
104,107
$462.70K
ORBIMED ADVISORS LLC entity
10% owner
1,868,966
$8.31M
Bill & Melinda Gates Foundation entity
10% owner
722,179
$3.21M
Section 32 Fund 1, LP entity
10% owner
451,362
$2.01M
GV 2016 GP, L.L.C.
10% owner
451,362
$2.01M
GRAY MICHAEL
President, CEO and CFO
250,000
$1.11M
Alexandria Venture Investments, LLC entity
10% owner
225,680
$1.00M
Anna-Maria & Stephen Kellen Foundation, Inc. entity
10% owner
124,381
$552.81K
Lawton Alison Frances
Director
96,667
$429.64K
Aliski William
Director
96,667
$429.64K
Thoren Natasha Fay
Chief Legal Officer
9,462
$42.05K
+54.4%
Woods Keith
Director
6,000
$26.67K
MCGIRR DAVID W J
Director
4,722
$20.99K
Bridger Gary
Director
4,722
$20.99K
de Craecker Francoise
Director
4,722
$20.99K

No percentages here. This company's share count has moved by a factor of 15.2 over the window, from 11,408,357 to 173,662,376 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
Craig Adam R
12 Aug 2026
Executive Chairman
Sell
47,436
$4.44
$210.83K
Volpone John
12 Aug 2026
President
Sell
24,576
$4.44
$109.23K
KIRSKE DAVID
30 Jun 2026
Chief Financial Officer
Sell
8,543
$4.26
$36.43K
KIRSKE DAVID
12 May 2026
Chief Financial Officer
Sell
16,961
$4.29
$72.82K
Arbet-Engels Christophe
24 Jan 2025
Chief Medical Officer
Sell
11,624
$0.45
$5.28K
DiBiase Mary
24 Jan 2025
Chief Operating Officer
Sell
22,258
$0.45
$10.09K
Baldry Mark
24 Jan 2025
Chief Commercial Officer
Sell
29,159
$0.45
$13.24K
Mostafa Adam S.
24 Jan 2025
Chief Financial Officer
Sell
74,773
$0.45
$33.95K
Ragan Paula
24 Jan 2025
President and CEO
Sell
76,473
$0.45
$34.72K
Ragan Paula
15 Nov 2024
President and CEO
Sell
31,897
$0.39
$12.58K
Ragan Paula
15 Oct 2024
President and CEO
Sell
31,897
$0.56
$17.93K
Taveras Arthur
7 Oct 2024
Chief Scientific Officer
Sell
76,920
$0.56
$43.31K
DiBiase Mary
7 Oct 2024
Chief Operating Officer
Sell
67,695
$0.57
$38.33K
Ragan Paula
7 Oct 2024
President and CEO
Sell
239,436
$0.55
$131.52K
Baldry Mark
7 Oct 2024
Chief Commercial Officer
Sell
11,127
$0.58
$6.51K
Mostafa Adam S.
7 Oct 2024
Chief Financial Officer
Sell
230,645
$0.55
$126.90K
DiBiase Mary
9 Sep 2024
Chief Operating Officer
Sell
2,642
$0.66
$1.74K
DiBiase Mary
11 Mar 2024
Chief Operating Officer
Sell
15,409
$0.88
$13.59K
Mostafa Adam S.
11 Mar 2024
Chief Financial Officer
Sell
52,500
$0.88
$46.35K
Ragan Paula
11 Mar 2024
President and CEO
Sell
49,678
$0.88
$43.86K
Taveras Arthur
11 Mar 2024
Chief Scientific Officer
Sell
14,235
$0.88
$12.55K
Mostafa Adam S.
12 Feb 2024
Chief Financial Officer
Sell
27,721
$1.01
$27.97K
Ragan Paula
12 Feb 2024
President and CEO
Sell
21,695
$1.01
$21.89K
Taveras Arthur
12 Feb 2024
Chief Scientific Officer
Sell
787
$1.01
$792.67
DiBiase Mary
12 Feb 2024
Chief Operating Officer
Sell
3,683
$1.01
$3.71K
DiBiase Mary
8 Sep 2023
Chief Operating Officer
Sell
2,642
$1.25
$3.30K
Stewart Murray
10 Aug 2023
Interim Chief Medical Officer
Sell
130,056
$1.06
$137.86K
Mostafa Adam S.
30 Jun 2023
Chief Financial Officer
Sell
2,641
$1.89
$4.99K
DiBiase Mary
30 Jun 2023
Chief Operating Officer
Sell
464
$1.89
$876.96
Ragan Paula
23 Jun 2023
President and CEO
Sell
6,724
$1.92
$12.91K
Mostafa Adam S.
23 Jun 2023
Chief Financial Officer
Sell
5,417
$1.93
$10.45K
DiBiase Mary
23 Jun 2023
Chief Operating Officer
Sell
857
$1.93
$1.65K
Ragan Paula
15 Jun 2023
President and CEO
Sell
6,724
$2.23
$14.99K
Mostafa Adam S.
15 Jun 2023
Chief Financial Officer
Sell
5,417
$2.22
$12.03K
DiBiase Mary
15 Jun 2023
Chief Operating Officer
Sell
857
$2.23
$1.91K
Ragan Paula
31 May 2023
President and CEO
Sell
6,292
$1.95
$12.27K
Ragan Paula
10 Mar 2023
President and CEO
Sell
49,678
$0.84
$41.73K
Taveras Arthur
10 Mar 2023
Chief Scientific Officer
Sell
16,806
$0.84
$14.12K
Mostafa Adam S.
10 Mar 2023
Chief Financial Officer
Sell
52,500
$0.84
$44.10K
DiBiase Mary
10 Mar 2023
Chief Operating Officer
Sell
18,192
$0.84
$15.28K
Ragan Paula
13 Feb 2023
President and CEO
Sell
21,695
$0.93
$20.18K
Mostafa Adam S.
13 Feb 2023
Chief Financial Officer
Sell
27,721
$0.93
$25.78K
DiBiase Mary
13 Feb 2023
Chief Operating Officer
Sell
4,348
$0.93
$4.04K
Taveras Arthur
13 Feb 2023
Chief Scientific Officer
Sell
928
$0.93
$863.04
Mostafa Adam S.
17 Aug 2022
Chief Financial Officer
Sell
10,834
no price
Ragan Paula
17 Aug 2022
President and CEO
Sell
13,448
no price
DiBiase Mary
17 Aug 2022
Chief Operating Officer
Sell
1,713
no price
Meisner Derek M
17 Aug 2022
Chief Legal Officer
Sell
8,334
no price
DiBiase Mary
30 Jun 2022
Chief Operating Officer
Sell
1,578
no price
Mostafa Adam S.
30 Jun 2022
Chief Financial Officer
Sell
2,641
no price
Meisner Derek M
24 Jun 2022
Chief Legal Officer
Sell
4,166
no price
Ragan Paula
24 Jun 2022
President and CEO
Sell
6,724
no price
DiBiase Mary
24 Jun 2022
Chief Operating Officer
Sell
856
no price
Mostafa Adam S.
24 Jun 2022
Chief Financial Officer
Sell
5,416
no price
Meisner Derek M
16 Jun 2022
Chief Legal Officer
Sell
4,166
no price
DiBiase Mary
16 Jun 2022
Chief Operating Officer
Sell
856
no price
Ragan Paula
16 Jun 2022
President and CEO
Sell
6,724
no price
Mostafa Adam S.
16 Jun 2022
Chief Financial Officer
Sell
5,416
no price
Ragan Paula
3 Jun 2022
President and CEO
Sell
6,292
$1.21
$7.61K
Cadavid Diego
11 Feb 2022
Chief Medical Officer
Sell
928
no price
Ragan Paula
11 Feb 2022
President and CEO
Sell
21,695
no price
DiBiase Mary
11 Feb 2022
Chief Operating Officer
Sell
12,545
no price
Meisner Derek M
11 Feb 2022
Chief Legal Officer
Sell
15,909
no price
Mostafa Adam S.
11 Feb 2022
Chief Financial Officer
Sell
27,721
no price
Meisner Derek M
17 Aug 2021
General Counsel
Sell
8,332
$5.10
$42.49K
Ragan Paula
17 Aug 2021
President and CEO
Sell
13,448
$5.10
$68.58K
Mostafa Adam S.
17 Aug 2021
Chief Financial Officer
Sell
10,832
$5.10
$55.24K
Ragan Paula
15 Jul 2021
President and CEO
Sell
13,448
$5.78
$77.73K
Mostafa Adam S.
30 Jun 2021
Chief Financial Officer
Sell
2,641
$6.64
$17.54K
Meisner Derek M
24 Jun 2021
General Counsel
Sell
4,166
$7.00
$29.16K
Mostafa Adam S.
24 Jun 2021
Chief Financial Officer
Sell
5,417
$7.01
$37.97K
Mostafa Adam S.
15 Jun 2021
Chief Financial Officer
Sell
5,417
$7.84
$42.47K
Meisner Derek M
15 Jun 2021
General Counsel
Sell
4,166
$7.84
$32.66K
Ragan Paula
2 Jun 2021
President and CEO
Sell
2,400
$9.50
$22.80K
Ragan Paula
1 Jun 2021
President and CEO
Sell
4,104
$9.41
$38.62K
Ragan Paula
3 May 2021
President and CEO
Sell
2,400
$8.33
$19.99K
Ragan Paula
5 Apr 2021
President and CEO
Sell
2,400
$9.17
$22.01K
Ragan Paula
2 Mar 2021
President and CEO
Sell
2,400
$9.74
$23.38K
Ragan Paula
2 Feb 2021
President and CEO
Sell
2,400
$7.88
$18.91K
Ragan Paula
5 Jan 2021
President and CEO
Sell
2,400
$7.00
$16.80K
Ragan Paula
23 Dec 2020
President and CEO
Sell
4,800
$7.00
$33.60K
Ragan Paula
5 Oct 2020
President and CEO
Sell
1,797
$7.00
$12.58K
Ragan Paula
2 Oct 2020
President and CEO
Sell
603
$7.00
$4.22K
Mostafa Adam S.
21 Sep 2020
Chief Financial Officer
Sell
10,834
$7.08
$76.70K
Meisner Derek M
9 Sep 2020
General Counsel
Sell
8,334
$8.05
$67.09K
Ragan Paula
9 Sep 2020
President and CEO
Sell
8,840
$8.04
$71.07K
Skerlj Renato
9 Sep 2020
Chief Scientific Officer
Sell
5,834
$8.05
$46.96K
Ragan Paula
2 Sep 2020
President and CEO
Sell
2,400
$7.99
$19.18K
Ragan Paula
3 Aug 2020
President and CEO
Sell
2,400
$7.45
$17.88K
Ragan Paula
2 Jul 2020
President and CEO
Sell
2,400
$9.05
$21.72K
Mostafa Adam S.
30 Jun 2020
See Remarks
Sell
1,725
$9.04
$15.59K
Ragan Paula
3 Jun 2020
President and CEO
Sell
9,707
$8.88
$86.20K
Ragan Paula
2 Jun 2020
President and CEO
Sell
2,400
$8.65
$20.76K
Ragan Paula
1 Jun 2020
President and CEO
Sell
4,275
$8.63
$36.89K
Ragan Paula
4 May 2020
President and CEO
Sell
2,400
$8.92
$21.41K
Ragan Paula
2 Apr 2020
President and CEO
Sell
2,400
$8.40
$20.16K
Ragan Paula
2 Mar 2020
President and CEO
Sell
2,400
$10.64
$25.54K

What was left out

Form 4 filings counted 254
Amendments (4/A) skipped 14
Filings about a different issuer 0
Unreadable filings 0
Joint filings 7
Sales on a Rule 10b5-1 plan 6
Sales straight out of an exercise 0
Sales at will 97
Transactions with no price 19
Shares from compensation/vesting 24,070,951
Sales filed before the plan box existed 61
History held since 20 Nov 2017