Dimensional Fund Advisors
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Dimensional Fund Advisors’s Altimmune ALT Stock Holding History

Dimensional Fund Advisors’s Portfolio ALT Stock Details ALT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.22M Buy
1,045,926
+762,223
+269% +$3.24M ﹤0.01% 2614
2025
Q4 		$1.02M Sell
283,703
-14,086
-5% -$61.4K ﹤0.01% 2856
2025
Q3 		$1.12M Sell
297,789
-149,681
-33% -$578K ﹤0.01% 2876
2025
Q2 		$1.73M Sell
447,470
-44,999
-9% -$244K ﹤0.01% 2789
2025
Q1 		$2.46M Sell
492,469
-140,972
-22% -$893K ﹤0.01% 2681
2024
Q4 		$4.57M Sell
633,441
-12,936
-2% -$98.8K ﹤0.01% 2564
2024
Q3 		$3.97M Buy
646,377
+76,203
+13% +$516K ﹤0.01% 2586
2024
Q2 		$3.79M Buy
570,174
+335,444
+143% +$2.48M ﹤0.01% 2585
2024
Q1 		$2.39M Sell
234,730
-26,788
-10% -$272K ﹤0.01% 2751
2023
Q4 		$2.94M Buy
261,518
+72,267
+38% +$302K ﹤0.01% 2702
2023
Q3 		$492K Sell
189,251
-67,003
-26% -$192K ﹤0.01% 3045
2023
Q2 		$905K Sell
256,254
-310,247
-55% -$1.39M ﹤0.01% 2948
2023
Q1 		$2.39M Buy
566,501
+388,636
+219% +$4.62M ﹤0.01% 2701
2022
Q4 		$2.92K Buy
177,865
+3,492
+2% +$39.2K ﹤0.01% 2608
2022
Q3 		$2.23M Buy
174,373
+51,009
+41% +$753K ﹤0.01% 2684
2022
Q2 		$1.44M Buy
123,364
+50,662
+70% +$312K ﹤0.01% 2838
2022
Q1 		$443K Sell
72,702
-5,768
-7% -$42.5K ﹤0.01% 3175
2021
Q4 		$719K Buy
+78,470
New +$834K ﹤0.01% 3094
2020
Q4 		– Sell
-48,352
Closed -$638K – 3344
2020
Q3 		$638K Hold
48,352
– – ﹤0.01% 3016
2020
Q2 		$518K Hold
48,352
– – ﹤0.01% 3072
2020
Q1 		$155K Sell
48,352
-5,553
-10% -$12.8K ﹤0.01% 3229
2019
Q4 		$102K Sell
53,905
-12,059
-18% -$22.3K ﹤0.01% 3314
2019
Q3 		$129K Sell
65,964
-8,648
-12% -$19.2K ﹤0.01% 3327
2019
Q2 		$178K Hold
74,612
– – ﹤0.01% 3335
2019
Q1 		$216K Buy
74,612
+12,706
+21% +$37.9K ﹤0.01% 3295
2018
Q4 		$128K Buy
+61,906
New +$219K ﹤0.01% 3335
2017
Q2 		– Sell
-294
Closed -$72K – 3313
2017
Q1 		$72K Sell
294
-321
-52% -$172K ﹤0.01% 3265
2016
Q4 		$599K Buy
+615
New +$551K ﹤0.01% 3060

Other funds holding ALT

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Dimensional Fund Advisors's ALT Position: Q1 2026 in Review

Dimensional Fund Advisors increased its Altimmune (ALT) stake by 269% in Q1 2026, buying an estimated $3.24M and bringing the position to 1,045,926 shares worth $3.22M. The position accounts for ﹤0.01% of the portfolio, ranked #2614.

Dimensional Fund Advisors first reported a position in ALT in Q4 2016 and has held it in 28 quarters since. The position peaked at $4.57M in Q4 2024. 173 funds tracked by Wall St. Rank hold ALT as of Q1 2026.

  • Dimensional Fund Advisors held 1,045,926 shares of Altimmune worth $3.22M as of Q1 2026.
  • Dimensional Fund Advisors bought 762,223 Altimmune shares in Q1 2026, an estimated $3.24M.
  • Altimmune made up ﹤0.01% of Dimensional Fund Advisors's portfolio in Q1 2026, its #2614 holding.
  • Dimensional Fund Advisors first reported a position in Altimmune in Q4 2016 and has held it in 28 quarters since.
  • Dimensional Fund Advisors's Altimmune position peaked at $4.57M in Q4 2024.
  • 173 funds tracked by Wall St. Rank held Altimmune as of Q1 2026.

Based on Dimensional Fund Advisors's 13F filing for Q1 2026, filed 7 May 2026.