Granahan Investment Management’s CoStar Group CSGP Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $6.5M | Buy |
161,047
+69,118
| +75% | +$3.6M | 0.31% | 80 |
|
|
2025
Q4 | $6.18M | Sell |
91,929
-178,237
| -66% | -$12.6M | 0.26% | 89 |
|
|
2025
Q3 | $22.8M | Sell |
270,166
-30,766
| -10% | -$2.72M | 0.93% | 34 |
|
|
2025
Q2 | $24.2M | Sell |
300,932
-46,761
| -13% | -$3.64M | 0.98% | 29 |
|
|
2025
Q1 | $27.5M | Sell |
347,693
-10,513
| -3% | -$800K | 1.37% | 20 |
|
|
2024
Q4 | $25.6M | Sell |
358,206
-5,126
| -1% | -$387K | 1.07% | 29 |
|
|
2024
Q3 | $27.4M | Sell |
363,332
-60,094
| -14% | -$4.56M | 1.08% | 22 |
|
|
2024
Q2 | $31.4M | Sell |
423,426
-187,572
| -31% | -$15.9M | 1.26% | 17 |
|
|
2024
Q1 | $59M | Sell |
610,998
-101,086
| -14% | -$8.7M | 2.07% | 8 |
|
|
2023
Q4 | $62.2M | Sell |
712,084
-53,050
| -7% | -$4.29M | 2.06% | 10 |
|
|
2023
Q3 | $58.8M | Sell |
765,134
-26,334
| -3% | -$2.18M | 2.1% | 9 |
|
|
2023
Q2 | $70.4M | Sell |
791,468
-3,475
| -0.4% | -$268K | 2.17% | 9 |
|
|
2023
Q1 | $54.7M | Sell |
794,943
-571,919
| -42% | -$42.2M | 1.67% | 16 |
|
|
2022
Q4 | $106M | Sell |
1,366,862
-145,365
| -10% | -$11.4M | 3.23% | 5 |
|
|
2022
Q3 | $105M | Sell |
1,512,227
-205,824
| -12% | -$14.3M | 3.44% | 4 |
|
|
2022
Q2 | $104M | Sell |
1,718,051
-180,518
| -10% | -$10.9M | 3.54% | 3 |
|
|
2022
Q1 | $126M | Buy |
1,898,569
+608,380
| +47% | +$40.4M | 3.14% | 5 |
|
|
2021
Q4 | $102M | Sell |
1,290,189
-50,864
| -4% | -$4.27M | 2.1% | 10 |
|
|
2021
Q3 | $115M | Sell |
1,341,053
-15,377
| -1% | -$1.33M | 2.19% | 12 |
|
|
2021
Q2 | $112M | Sell |
1,356,430
-30,250
| -2% | -$2.62M | 2.09% | 11 |
|
|
2021
Q1 | $114M | Buy |
1,386,680
+150,170
| +12% | +$13M | 2.42% | 11 |
|
|
2020
Q4 | $114M | Buy |
1,236,510
+126,100
| +11% | +$11.1M | 2.57% | 9 |
|
|
2020
Q3 | $94.2M | Sell |
1,110,410
-41,410
| -4% | -$3.3M | 3.2% | 6 |
|
|
2020
Q2 | $81.9M | Buy |
1,151,820
+10,940
| +1% | +$707K | 2.96% | 7 |
|
|
2020
Q1 | $67M | Sell |
1,140,880
-368,070
| -24% | -$24M | 3.61% | 5 |
|
|
2019
Q4 | $90.3M | Buy |
1,508,950
+86,650
| +6% | +$5.06M | 4.15% | 2 |
|
|
2019
Q3 | $84.4M | Sell |
1,422,300
-297,320
| -17% | -$17.8M | 4.64% | 2 |
|
|
2019
Q2 | $95.3M | Buy |
1,719,620
+109,570
| +7% | +$5.6M | 4.71% | 1 |
|
|
2019
Q1 | $75.1M | Buy |
1,610,050
+136,200
| +9% | +$5.63M | 4.03% | 1 |
|
|
2018
Q4 | $49.7M | Buy |
1,473,850
+119,710
| +9% | +$4.37M | 3.52% | 1 |
|
|
2018
Q3 | $57M | Buy |
1,354,140
+96,710
| +8% | +$4.13M | 3.09% | 2 |
|
|
2018
Q2 | $51.9M | Sell |
1,257,430
-34,520
| -3% | -$1.33M | 3.13% | 2 |
|
|
2018
Q1 | $46.9M | Buy |
1,291,950
+12,950
| +1% | +$446K | 3.38% | 1 |
|
|
2017
Q4 | $38M | Sell |
1,279,000
-177,910
| -12% | -$5.21M | 2.99% | 1 |
|
|
2017
Q3 | $39.1M | Sell |
1,456,910
-80,840
| -5% | -$2.24M | 3.26% | 1 |
|
|
2017
Q2 | $40.5M | Buy |
1,537,750
+257,160
| +20% | +$6.25M | 3.74% | 1 |
|
|
2017
Q1 | $26.5M | Sell |
1,280,590
-905,840
| -41% | -$18.4M | 2.66% | 1 |
|
|
2016
Q4 | $41.2M | Sell |
2,186,430
-204,800
| -9% | -$4.02M | 1.42% | 8 |
|
|
2016
Q3 | $51.8M | Sell |
2,391,230
-194,000
| -8% | -$4.13M | 1.7% | 5 |
|
|
2016
Q2 | $56.5M | Buy |
2,585,230
+5,500
| +0.2% | +$109K | 2.06% | 3 |
|
|
2016
Q1 | $48.5M | Buy |
2,579,730
+10,710
| +0.4% | +$190K | 1.77% | 4 |
|
|
2015
Q4 | $53.1M | Sell |
2,569,020
-337,010
| -12% | -$6.71M | 1.83% | 3 |
|
|
2015
Q3 | $50.3M | Buy |
2,906,030
+424,370
| +17% | +$8.13M | 1.56% | 6 |
|
|
2015
Q2 | $49.9M | Buy |
2,481,660
+11,210
| +0.5% | +$229K | 1.41% | 5 |
|
|
2015
Q1 | $48.9M | Buy |
2,470,450
+117,040
| +5% | +$2.21M | 1.4% | 6 |
|
|
2014
Q4 | $43.2M | Sell |
2,353,410
-762,250
| -24% | -$12.3M | 1.26% | 13 |
|
|
2014
Q3 | $48.5M | Buy |
3,115,660
+79,080
| +3% | +$1.18M | 1.5% | 5 |
|
|
2014
Q2 | $48M | Buy |
3,036,580
+643,640
| +27% | +$10.4M | 1.4% | 7 |
|
|
2014
Q1 | $44.7M | Buy |
2,392,940
+308,240
| +15% | +$5.81M | 1.2% | 12 |
|
|
2013
Q4 | $38.5M | Buy |
2,084,700
+591,800
| +40% | +$10.5M | 0.99% | 23 |
|
|
2013
Q3 | $25.1M | Buy |
1,492,900
+12,200
| +0.8% | +$187K | 0.67% | 55 |
|
|
2013
Q2 | $19.1M | Buy |
+1,480,700
| New | +$16.8M | 0.55% | 70 |
|
Other funds holding CSGP
VPM
VCM
Granahan Investment Management's CSGP Position: Q1 2026 in Review
Granahan Investment Management increased its CoStar Group (CSGP) stake by 75% in Q1 2026, buying an estimated $3.6M and bringing the position to 161,047 shares worth $6.5M. The position accounts for 0.31% of the portfolio, ranked #80.
Granahan Investment Management first reported a position in CSGP in Q2 2013 and has held it in 52 quarters since. The position peaked at $126M in Q1 2022. 792 funds tracked by Wall St. Rank hold CSGP as of Q1 2026.
- Granahan Investment Management held 161,047 shares of CoStar Group worth $6.5M as of Q1 2026.
- Granahan Investment Management bought 69,118 CoStar Group shares in Q1 2026, an estimated $3.6M.
- CoStar Group made up 0.31% of Granahan Investment Management's portfolio in Q1 2026, its #80 holding.
- Granahan Investment Management first reported a position in CoStar Group in Q2 2013 and has held it in 52 quarters since.
- Granahan Investment Management's CoStar Group position peaked at $126M in Q1 2022.
- 792 funds tracked by Wall St. Rank held CoStar Group as of Q1 2026.
Based on Granahan Investment Management's 13F filing for Q1 2026, filed 15 May 2026.