SEC CIK 1272798

MONTGOMERY DAVID

Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.

Current Positions

CompanyShares OwnedAs Of
SGIview stock →858,5702026-01-02

Position History — SGI

Reported shares owned immediately after each Form 4 transaction, over time.

0392,695785,3891,178,0842007-022007-022011-072019-062022-012024-012026-01

Recent Filings — SGI

DateActivitySharesPriceOwned After
2026-02-26Grant / award (derivative)9,015$0.009,015
2026-01-02Grant / award (derivative)5,635$0.005,635
2026-01-02Option exercise (derivative)4,198$0.008,394
2026-01-02Option exercise (derivative)9,619$0.009,622
2026-01-02Option exercise (derivative)2,961$0.000
2026-01-02Option exercise (derivative)2,243$0.006,727
2026-01-02Option exercise (derivative)2,609$0.005,216
2026-01-02Option exercise (derivative)3,579$0.003,578
2026-01-02Option exercise (derivative)2,593$0.000
2026-01-02Tax withholding1,974$88.74858,570
2026-01-02Option exercise4,198$0.00860,544
2026-01-02Tax withholding4,521$88.74856,346
2026-01-02Option exercise9,619$0.00860,867
2026-01-02Tax withholding1,392$88.74851,248
2026-01-02Option exercise2,961$0.00852,640
2026-01-02Tax withholding1,055$88.74849,679
2026-01-02Option exercise2,243$0.00850,734
2026-01-02Tax withholding1,227$88.74848,491
2026-01-02Option exercise2,609$0.00849,718
2026-01-02Tax withholding1,683$88.74847,109
2026-01-02Option exercise3,579$0.00848,792
2026-01-02Tax withholding1,219$88.74845,213
2026-01-02Option exercise2,593$0.00846,432
2025-11-13Gift40,000$0.00843,839
2025-06-11Option exercise (derivative)37,624$0.000
2025-06-11Option exercise (derivative)63,384$0.000
2025-06-11Option exercise37,624$15.61959,847
2025-06-11Open-market sale45,826$65.67914,021
2025-06-11Open-market sale30,182$65.69883,839
2025-06-11Option exercise63,384$17.38922,223
2025-03-13Gift17,000$0.00858,839
2025-03-03Option exercise (derivative)50,000$0.0063,384
2025-03-03Open-market sale32,785$62.88875,839
2025-03-03Option exercise50,000$17.38908,624
2025-02-28Grant / award (derivative)12,592$0.0012,592
2025-01-03Option exercise (derivative)2,609$0.007,825
2025-01-03Option exercise (derivative)3,579$0.007,157
2025-01-03Option exercise (derivative)9,619$0.0019,241
2025-01-03Option exercise (derivative)4,724$0.000
2025-01-03Grant / award (derivative)8,970$0.008,970
2025-01-03Option exercise (derivative)18,897$0.000
2025-01-03Option exercise (derivative)2,955$0.002,961
2025-01-03Option exercise (derivative)2,593$0.002,593
2025-01-03Tax withholding1,683$55.74840,563
2025-01-03Option exercise2,593$0.00839,886
2025-01-03Tax withholding1,219$55.74838,667
2025-01-03Option exercise2,609$0.00843,172
2025-01-03Tax withholding1,227$55.74841,945
2025-01-03Option exercise18,897$0.00860,842
2025-01-03Tax withholding8,882$55.74851,960
2025-01-03Option exercise2,955$0.00854,915
2025-01-03Tax withholding1,389$55.74853,526
2025-01-03Option exercise9,619$0.00863,145
2025-01-03Tax withholding4,521$55.74858,624
2025-01-03Option exercise4,724$0.00839,514
2025-01-03Tax withholding2,221$55.74837,293
2025-01-03Option exercise3,579$0.00842,246
2024-12-06Gift50,000$0.00834,790
2024-02-20Gift60,000$0.00884,790
2024-02-16Grant / award (derivative)28,860$0.0028,860
2024-01-04Option exercise (derivative)4,724$0.004,724
2024-01-04Option exercise (derivative)3,579$0.0010,736
2024-01-04Option exercise (derivative)2,593$0.005,186
2024-01-04Grant / award (derivative)10,434$0.0010,434
2024-01-04Option exercise (derivative)2,961$0.005,916
2024-01-04Option exercise (derivative)18,897$0.0018,897
2024-01-04Tax withholding1,392$47.92939,017
2024-01-04Option exercise2,961$0.00940,409
2024-01-04Tax withholding8,882$47.92937,448
2024-01-04Option exercise4,724$0.00943,741
2024-01-04Tax withholding2,221$47.92941,520
2024-01-04Option exercise2,593$0.00944,113
2024-01-04Tax withholding1,219$47.92942,894
2024-01-04Option exercise3,579$0.00946,473
2024-01-04Tax withholding1,683$47.92944,790
2024-01-04Option exercise18,897$0.00946,330
2024-01-03Option exercise (derivative)72,456$0.000
2024-01-03Option exercise (derivative)9,056$0.000
2024-01-03Tax withholding4,257$48.31927,433
2024-01-03Option exercise9,056$0.00931,690
2024-01-03Tax withholding34,055$48.31922,634
2024-01-03Option exercise72,456$0.00956,689
2023-08-11Gift40,000$0.00884,233
2023-08-10Option exercise (derivative)100,000$0.00113,384
2023-08-10Open-market sale99,000$45.61925,233
2023-08-10Open-market sale1,000$45.98924,233
2023-08-10Option exercise100,000$17.381,024,233
2023-02-17Grant / award (derivative)8,877$0.008,877
2023-01-04Option exercise (derivative)4,724$0.009,448
2023-01-04Option exercise (derivative)2,593$0.007,779
2023-01-04Option exercise (derivative)18,897$0.0037,794
2023-01-04Option exercise (derivative)36,720$0.000
2023-01-04Grant / award (derivative)14,315$0.0014,315
2023-01-04Option exercise36,720$0.00941,492
2023-01-04Tax withholding2,221$34.93904,772
2023-01-04Option exercise4,724$0.00906,993
2023-01-04Tax withholding1,219$34.93902,269
2023-01-04Option exercise2,593$0.00903,488
2023-01-04Option exercise18,897$0.00909,777
2023-01-04Tax withholding17,259$34.93924,233
2023-01-04Tax withholding8,882$34.93900,895
2023-01-03Option exercise (derivative)9,056$0.009,056
2023-01-03Option exercise (derivative)72,480$0.0072,456
2023-01-03Option exercise72,480$0.00920,147
2023-01-03Tax withholding4,257$33.77890,880
2023-01-03Option exercise9,056$0.00895,137
2023-01-03Tax withholding34,066$33.77886,081
2022-09-07Open-market sale100,000$26.24847,667
2022-03-15Gift20,000$0.00947,667
2022-02-22Grant / award (derivative)56,691$0.0056,691
2022-01-05Option exercise (derivative)17,612$0.000
2022-01-05Option exercise17,612$0.00975,945
2022-01-05Tax withholding8,278$46.83967,667
2022-01-04Option exercise (derivative)4,725$0.0014,172
2022-01-04Grant / award (derivative)10,372$0.0010,372
2022-01-04Option exercise (derivative)36,720$0.0036,720
2022-01-04Option exercise36,720$0.00973,088
2022-01-04Tax withholding17,259$48.21955,829
2022-01-04Tax withholding2,221$48.21958,333
2022-01-04Option exercise4,725$0.00960,554
2022-01-03Option exercise (derivative)72,456$0.00144,936
2022-01-03Option exercise (derivative)9,060$0.0018,112
2022-01-03Option exercise72,456$0.00965,622
2022-01-03Tax withholding34,055$47.39931,567
2022-01-03Option exercise9,060$0.00940,627
2022-01-03Tax withholding4,259$47.39936,368
2021-02-11Open-market sale50,000$33.50893,166
2021-02-04Grant / award (derivative)217,392$0.00217,392
2021-01-25Open-market sale50,000$29.50943,166
2021-01-07Open-market sale50,000$28.00993,166
2021-01-05Option exercise (derivative)17,612$0.0017,612
2021-01-05Option exercise (derivative)15,824$0.000
2021-01-05Option exercise17,612$0.001,051,444
2021-01-05Tax withholding8,278$26.701,043,166
2021-01-05Option exercise15,824$0.001,041,270
2021-01-05Tax withholding7,438$26.701,033,832
2021-01-04Grant / award (derivative)18,897$26.4618,897
2021-01-04Option exercise (derivative)36,720$0.0073,440
2021-01-04Open-market sale50,000$26.531,025,446
2021-01-04Tax withholding17,259$26.461,075,446
2021-01-04Option exercise36,720$0.001,092,705
2021-01-03Option exercise (derivative)9,060$0.0027,172
2021-01-03Tax withholding4,259$27.001,055,985
2021-01-03Option exercise9,060$0.001,060,244
2020-12-15Option exercise (derivative)270,000$0.000
2020-12-15Tax withholding126,900$27.331,051,184
2020-12-15Option exercise270,000$0.001,178,084
2020-12-10Option exercise (derivative)74,272$0.000
2020-12-10Option exercise (derivative)38,208$0.000
2020-12-10Option exercise (derivative)37,624$0.0037,624
2020-12-10Open-market sale210,644$25.34908,084
2020-12-10Option exercise37,624$15.611,118,728
2020-12-10Option exercise74,272$14.381,081,104
2020-12-10Option exercise38,208$12.971,006,832
2020-12-10Option exercise107,456$9.26968,624
2020-12-10Option exercise19,352$17.88861,168
2020-11-16Grant / award (derivative)67,500$0.0067,500
2020-11-06Open-market sale41,000$97.66210,454
2020-02-13Open-market sale9,220$100.06251,454
2020-02-11Option exercise (derivative)5,150$0.000
2020-02-11Option exercise5,150—263,095
2020-02-11Tax withholding2,421$92.38260,674
2020-01-05Option exercise (derivative)4,404$0.008,806
2020-01-05Option exercise (derivative)3,957$0.003,956
2020-01-05Option exercise4,404$0.00260,015
2020-01-05Option exercise3,957$0.00257,471
2020-01-05Tax withholding2,070$85.56257,945
2020-01-05Tax withholding1,860$85.56255,611
2020-01-04Option exercise (derivative)9,181$0.0027,540
2020-01-04Option exercise9,181$0.00257,830
2020-01-04Tax withholding4,316$85.56253,514
2020-01-03Grant / award (derivative)9,058$0.009,058
2019-10-31Open-market sale40,000$90.19248,649
2019-07-26Open-market sale27,500$80.37289,449
2019-07-26Open-market sale800$81.11288,649
2019-07-25Option exercise (derivative)6,082$0.000
2019-07-25Open-market sale1,700$80.04316,949
2019-07-25Option exercise6,082$46.68324,731
2019-07-25Open-market sale6,082$80.00318,649
2019-06-18Open-market sale1,428$74.35318,649
2019-06-18Open-market sale18,572$73.58320,077
2019-05-06Open-market sale20,000$62.86338,649
2019-02-11Option exercise (derivative)5,151$0.005,150
2019-02-11Option exercise5,151—361,070
2019-02-11Tax withholding2,421$52.78358,649
2019-01-05Option exercise (derivative)4,404$0.0013,210
2019-01-05Option exercise (derivative)3,957$0.007,913
2019-01-05Tax withholding2,070$42.21355,919
2019-01-05Option exercise3,957—355,445
2019-01-05Option exercise4,404—357,989
2019-01-05Tax withholding1,860$42.21353,585
2019-01-04Grant / award (derivative)36,721$0.0036,721
2018-12-03Option exercise (derivative)45,000$0.000
2018-12-03Option exercise45,000$6.14376,573
2018-12-03Tax withholding25,085$53.46351,488
2018-03-05Option exercise (derivative)3,957$0.0011,870
2018-03-05Grant / award (derivative)15,827$0.0015,827
2018-03-05Option exercise3,957—333,433
2018-03-05Tax withholding1,860$49.99331,573
2018-02-11Option exercise (derivative)5,151$0.0010,301
2018-02-11Tax withholding2,421$55.74329,476
2018-02-11Option exercise5,151—331,897
2018-01-05Grant / award (derivative)18,812$0.0018,812
2018-01-05Grant / award (derivative)17,614$0.0017,614
2017-02-24Grant / award (derivative)20,603$0.0020,603
2017-02-24Option exercise (derivative)5,151$0.0015,452
2017-02-24Tax withholding2,597$45.95324,385
2017-02-24Grant / award5,151$0.00326,982
2017-02-24Tax withholding2,400$45.95326,746
2017-02-24Grant / award4,761$0.00329,146
2017-01-05Grant / award (derivative)53,346$0.0053,346
2016-02-26Open-market sale30,200$57.89321,831
2016-02-19Option exercise (derivative)83,333$0.000
2016-02-19Grant / award5,282$0.00352,031
2016-02-19Open-market sale21,511$54.68346,749
2016-02-19Option exercise83,333$13.47368,260
2015-07-13Option exercise (derivative)32,308$0.0083,333
2015-07-13Option exercise32,308$13.47317,235
2015-07-13Open-market sale32,308$70.24284,927
2015-07-10Option exercise (derivative)17,692$0.00115,641
2015-07-10Open-market sale17,692$70.01284,927
2015-07-10Option exercise17,692$13.47302,619
2015-02-27Grant / award (derivative)18,568$0.0018,568
2014-05-16Open-market sale5,000$53.71284,927
2014-02-28Grant / award (derivative)9,552$0.009,552
2014-02-24Option exercise (derivative)7,198$0.000
2014-02-22Option exercise7,198$0.00289,927
2013-08-06Open-market sale20,000$39.74282,729
2013-03-18Grant / award (derivative)7,198$0.007,198
2013-02-22Grant / award (derivative)26,864$0.0026,864
2013-02-19Open-market sale10,500$38.85302,729
2013-02-14Grant / award20,363$0.00313,229
2012-06-12Option exercise (derivative)90,000$0.0045,000
2012-06-12Option exercise90,000$6.14327,566
2012-06-12Open-market sale34,700$23.56292,866
2012-03-09Option exercise (derivative)33,333$0.00133,333
2012-03-09Option exercise33,333$13.47270,899
2012-03-09Open-market sale33,333$82.11237,566
2012-02-15Option exercise (derivative)33,334$0.00166,666
2012-02-15Open-market sale33,334$75.12237,566
2012-02-15Option exercise33,334$13.47270,900
2012-02-09Grant / award (derivative)4,838$0.004,838
2011-07-29Option exercise (derivative)40,000$0.00200,000
2011-07-29Open-market sale14,010$70.49263,556
2011-07-29Open-market sale25,990$71.37237,566
2011-07-29Option exercise40,000$13.47277,566
2011-04-08Option exercise (derivative)60,000$0.00240,000
2011-04-08Open-market sale100,000$57.53237,566
2011-04-08Option exercise60,000$13.47337,566
2011-03-24Option exercise (derivative)50,000$0.00300,000
2011-03-24Open-market sale80,000$50.02277,566
2011-03-24Option exercise50,000$13.47357,566
2011-02-22Grant / award (derivative)6,082$0.006,082
2011-02-08Open-market sale60,000$46.03307,566
2011-01-25Option exercise (derivative)50,000$0.000
2011-01-25Option exercise50,000$11.76437,566
2011-01-25Open-market sale70,000$43.29367,566
2010-05-12Open-market sale15,000$35.00387,566
2010-04-29Open-market sale25,000$35.00402,566
2010-03-02Option exercise (derivative)45,000$0.00135,000
2010-03-02Option exercise45,000$6.14472,566
2010-03-02Open-market sale45,000$29.19427,566
2010-02-19Open-market sale35,000—427,566
2009-02-27Grant / award (derivative)180,000$0.00180,000
2008-05-15Grant / award (derivative)50,000$0.0050,000
2008-02-07Option exercise (derivative)7,966$0.000
2008-02-07Open-market sale300$17.50462,566
2008-02-07Open-market sale738$17.49462,866
2008-02-07Open-market sale1,700$17.47463,604
2008-02-07Option exercise7,966$2.86465,304
2007-02-26Option exercise (derivative)49,219$0.000
2007-02-26Option exercise49,219$1.90479,688
2007-02-26Open-market sale2,100$25.52477,588
2007-02-26Open-market sale1,400$25.53476,188
2007-02-26Open-market sale2,200$25.56471,188
2007-02-26Open-market sale1,100$25.66457,338
2007-02-26Open-market sale300$25.65458,438
2007-02-26Open-market sale1,600$25.64458,738
2007-02-26Open-market sale200$25.64460,338
2007-02-26Open-market sale800$25.63460,538
2007-02-26Open-market sale300$25.63461,338
2007-02-26Open-market sale300$25.62461,638
2007-02-26Open-market sale800$25.61461,938
2007-02-26Open-market sale1,000$25.60462,738
2007-02-26Open-market sale2,642$25.59463,738
2007-02-26Open-market sale958$25.58466,380
2007-02-26Open-market sale300$25.58467,338
2007-02-26Open-market sale3,550$25.57467,638
2007-02-26Open-market sale2,000$25.54474,188
2007-02-26Open-market sale800$25.55473,388
2007-02-20Open-market sale600$26.26446,669
2007-02-20Open-market sale400$26.27446,269
2007-02-20Open-market sale600$26.39430,469
2007-02-20Open-market sale100$26.37431,069
2007-02-20Open-market sale1,800$26.36431,169
2007-02-20Open-market sale1,100$26.28445,169
2007-02-20Open-market sale1,000$26.29444,169
2007-02-20Open-market sale3,700$26.30440,469
2007-02-20Open-market sale600$26.31439,869
2007-02-20Open-market sale2,800$26.32437,069
2007-02-20Open-market sale1,900$26.33435,169
2007-02-20Open-market sale200$26.34434,969
2007-02-20Open-market sale2,000$26.35432,969
2007-02-20Option exercise (derivative)55,758$0.007,966
2007-02-20Option exercise (derivative)373,836$0.0049,219
2007-02-20Open-market sale14,525$26.05579,944
2007-02-20Open-market sale2,752$26.13470,517
2007-02-20Open-market sale4,600$26.14465,917
2007-02-20Open-market sale2,300$26.15463,617
2007-02-20Open-market sale2,800$26.16460,817
2007-02-20Open-market sale2,100$26.17458,717
2007-02-20Open-market sale1,748$26.18456,969
2007-02-20Open-market sale2,500$26.19454,469
2007-02-20Open-market sale800$26.20453,669
2007-02-20Open-market sale1,300$26.21452,369
2007-02-20Open-market sale200$26.22452,169
2007-02-20Open-market sale3,000$26.23449,169
2007-02-20Open-market sale1,900$26.24447,269
2007-02-20Option exercise373,836$1.90570,711
2007-02-20Option exercise55,758$2.86626,469
2007-02-20Open-market sale10,900$26.00615,569
2007-02-20Open-market sale5,800$26.01609,769
2007-02-20Open-market sale7,500$26.02602,269
2007-02-20Open-market sale100$26.03602,169
2007-02-20Open-market sale6,100$26.12473,269
2007-02-20Open-market sale2,300$26.11479,369
2007-02-20Open-market sale8,700$26.10481,669
2007-02-20Open-market sale25,900$26.09490,369
2007-02-20Open-market sale28,175$26.08516,269
2007-02-20Open-market sale28,000$26.07544,444
2007-02-20Open-market sale400$26.07572,444
2007-02-20Open-market sale7,100$26.06572,844
2007-02-20Open-market sale200$26.05594,469
2007-02-20Open-market sale5,600$26.04594,669
2007-02-20Open-market sale1,900$26.03600,269
2006-06-28Grant / award (derivative)350,000$13.47350,000

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.