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
Q2 		$1.94M Sell
639,436
-406,490
-39% -$1.21M ﹤0.01% 2748
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
New +$6.73M ﹤0.01% 2701
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 $6.73T AUM 46.02% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Dimensional Fund Advisors's ALT Position: Q2 2026 in Review

Dimensional Fund Advisors reduced its Altimmune (ALT) stake by 39% in Q2 2026, selling an estimated $1.21M and leaving 639,436 shares worth $1.94M. The position accounts for ﹤0.01% of the portfolio, ranked #2748.

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. 211 funds tracked by Wall St. Rank hold ALT as of Q2 2026.

  • Dimensional Fund Advisors held 639,436 shares of Altimmune worth $1.94M as of Q2 2026.
  • Dimensional Fund Advisors sold 406,490 Altimmune shares in Q2 2026, an estimated $1.21M.
  • Altimmune made up ﹤0.01% of Dimensional Fund Advisors's portfolio in Q2 2026, its #2748 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.
  • 211 funds tracked by Wall St. Rank held Altimmune as of Q2 2026.

Based on Dimensional Fund Advisors's 13F filing for Q2 2026, filed 11 Aug 2026.