Burow Kristina

Director · Ten-percent owner · SRRK, NMRA, MTSR, BOLD

As of 2026-09-16, Burow Kristina has 69 Form 4 transactions on record across 4 companies — 30 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $5.8MIndirect: $4.7M$10.4Mas of 2026-09-16
  • Direct $5.8M
  • Indirect $4.7M
SRRKdirect114,657 sh$5.7M
NMRAindirect6,046,907 sh$4.7M
NMRAdirect80,000 sh$62K
BOLDdirect16,000 sh$45K

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

MTSR · 33 trades
2025-11-13: Award / grant, 2,688 sh2025-11-13: Disposition, 8,313,680 sh2025-11-13: Disposition, 7,523,682 sh2025-11-13: Disposition, 8,313,680 sh2025-11-13: Disposition, 2,688 sh2025-11-13: Disposition, 17,070,904 sh2025-11-13: Disposition, 148,953 sh2025-11-13: Disposition, 16,125 sh2025-11-13: Award / grant, 2,688 sh2025-11-13: Disposition, 18,503,128 sh2025-11-13: Disposition, 7,523,682 sh2025-11-13: Disposition, 18,503,128 sh2025-11-13: Disposition, 17,070,904 sh2025-11-13: Disposition, 2,688 sh2025-11-13: Disposition, 148,953 sh2025-11-13: Disposition, 16,125 sh2025-05-20: Award / grant, 16,125 sh ($0)2025-02-03: Purchase, 1,432,224 sh ($25.8M)2025-02-03: Purchase, 789,998 sh ($14.2M)2025-02-03: Conversion, 7,523,682 sh2025-02-03: Conversion, 2,678,571 sh2025-02-03: Conversion, 15,000,000 sh2025-02-03: Conversion, 16,006,949 sh2025-02-03: Conversion, 15,000,000 sh2025-02-03: Conversion, 19,933,333 sh2025-02-03: Conversion, 7,523,682 sh2025-02-03: Conversion, 2,678,571 sh2025-02-03: Conversion, 16,006,949 sh2025-02-03: Conversion, 2,678,571 sh2025-02-03: Conversion, 15,000,000 sh2025-02-03: Conversion, 2,678,571 sh2025-02-03: Conversion, 15,000,000 sh2025-02-03: Conversion, 19,933,333 sh
NMRA · 19 trades
2026-05-27: Award / grant, 80,000 sh ($0)2025-10-27: Purchase, 1,915,700 sh ($5.0M)2025-05-28: Award / grant, 80,000 sh ($0)2025-05-28: Award / grant, 46,455 sh2025-05-28: Disposition, 46,455 sh2025-05-28: Disposition, 28,571 sh2025-05-28: Award / grant, 46,455 sh2025-05-28: Award / grant, 28,571 sh2025-05-28: Disposition, 46,455 sh2025-05-28: Disposition, 28,571 sh2025-05-28: Award / grant, 28,571 sh2025-02-13: Disposition, 28,571 sh2025-02-13: Disposition, 46,455 sh2025-02-13: Award / grant, 28,571 sh2025-02-13: Disposition, 28,571 sh2025-02-13: Disposition, 46,455 sh2025-02-13: Award / grant, 46,455 sh2025-02-13: Award / grant, 28,571 sh2025-02-13: Award / grant, 46,455 sh
SRRK · 16 trades
2026-07-01: Sale, 2,105 sh ($113K)2026-07-01: Sale, 948 sh ($51K)2026-06-04: Award / grant, 4,310 sh ($0)2026-06-04: Award / grant, 6,839 sh ($0)2026-04-23: Option exercise, 36,000 sh ($328K)2026-04-23: Option exercise, 7,800 sh ($209K)2026-04-23: Option exercise, 18,000 sh ($150K)2026-04-23: Option exercise, 28,000 sh ($133K)2026-04-23: Option exercise, 36,000 sh ($0)2026-04-23: Option exercise, 7,800 sh ($0)2026-04-23: Option exercise, 18,000 sh ($0)2026-04-23: Option exercise, 28,000 sh ($0)2025-05-29: Sale, 4,400 sh ($131K)2025-05-29: Sale, 1,000 sh ($29K)2025-05-22: Award / grant, 9,206 sh ($0)2025-05-22: Award / grant, 7,632 sh ($0)
BOLD · 1 trade
2025-06-23: Award / grant, 16,000 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-07-01SRRKSale2,105 @ $53.49$113K−1.8% of holding115,605Form 4
2026-07-01SRRKSale948 @ $54.28$51K−0.8% of holding114,657Form 4
2025-10-27NMRAPurchase1,915,700 @ $2.61$5.0M+46.4% of holding6,046,907Form 4
2025-05-29SRRKSale4,400 @ $29.83$131K−17.3% of holding21,071Form 4
2025-05-29SRRKSale1,000 @ $29.24$29K−3.8% of holding25,471Form 4
2025-02-03MTSRPurchase1,432,224 @ $18.00$25.8M+8.4% of holding18,503,128Form 4
2025-02-03MTSRPurchase789,998 @ $18.00$14.2M+10.5% of holding8,313,680Form 4
62 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-04SRRKAward / grant4,3104,310Form 4
2026-06-04SRRKAward / grant6,839117,710Form 4
2026-05-27NMRAAward / grant80,00080,000Form 4
2026-04-23SRRKOption exercise36,00092,871Form 4
2026-04-23SRRKOption exercise7,80028,871Form 4
2026-04-23SRRKOption exercise18,000110,871Form 4
2026-04-23SRRKOption exercise28,00056,871Form 4
2026-04-23SRRKOption exercise36,0000Form 4
2026-04-23SRRKOption exercise7,8000Form 4
2026-04-23SRRKOption exercise18,0000Form 4
2026-04-23SRRKOption exercise28,0000Form 4
2025-11-13MTSRAward / grant2,6882,688Form 4
2025-11-13MTSRDisposition8,313,6800Form 4
2025-11-13MTSRDisposition7,523,6820Form 4
2025-11-13MTSRDisposition8,313,6800Form 4
2025-11-13MTSRDisposition2,6880Form 4
2025-11-13MTSRDisposition17,070,9040Form 4
2025-11-13MTSRDisposition148,9530Form 4
2025-11-13MTSRDisposition16,1250Form 4
2025-11-13MTSRAward / grant2,6882,688Form 4
2025-11-13MTSRDisposition18,503,1280Form 4
2025-11-13MTSRDisposition7,523,6820Form 4
2025-11-13MTSRDisposition18,503,1280Form 4
2025-11-13MTSRDisposition17,070,9040Form 4
2025-11-13MTSRDisposition2,6880Form 4
2025-11-13MTSRDisposition148,9530Form 4
2025-11-13MTSRDisposition16,1250Form 4
2025-06-23BOLDAward / grant16,00016,000Form 4
2025-05-28NMRAAward / grant80,00080,000Form 4
2025-05-28NMRAAward / grant46,45546,455Form 4
2025-05-28NMRADisposition46,4550Form 4
2025-05-28NMRADisposition28,5710Form 4
2025-05-28NMRAAward / grant46,45546,455Form 4
2025-05-28NMRAAward / grant28,57128,571Form 4
2025-05-28NMRADisposition46,4550Form 4
2025-05-28NMRADisposition28,5710Form 4
2025-05-28NMRAAward / grant28,57128,571Form 4
2025-05-22SRRKAward / grant9,2069,206Form 4
2025-05-22SRRKAward / grant7,63226,471Form 4
2025-05-20MTSRAward / grant16,12516,125Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.