Biff Bowman
CIK 1548048 · View on SEC EDGAR ↗
First SEC filing: June 3, 2026 · Latest: June 3, 2026
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 22, 2019 | NTRSO | S | 13,208 | $106.53 | $1,407,048 | 74,980 Direct | -14.98% | Disposed | -82.7% (price as of 2026-08-19) |
| Aug. 2, 2019 | NTRSO | S | 298 | $93.36 | $27,821 | 91,006 Direct | -0.33% | Disposed | -80.3% (price as of 2026-08-19) |
| Aug. 2, 2019 | NTRSO | S | 45,906 | $92.81 | $4,260,536 | 91,304 Direct | -33.46% | Disposed | -80.2% (price as of 2026-08-19) |
| Aug. 9, 2018 | NTRSO | S | 21,352 | $111.11 | $2,372,421 | 73,411 Direct | -22.53% | Disposed | -83.5% (price as of 2026-08-19) |
| Feb. 27, 2018 | NTRSO | S | 13,811 | $108.53 | $1,498,908 | 74,801 Direct | -15.59% | Disposed | -83.1% (price as of 2026-08-19) |
| April 27, 2017 | NTRSO | S | 23,167 | $91.77 | $2,126,036 | 75,365 Direct | -23.51% | Disposed | -80.0% (price as of 2026-08-19) |
| Nov. 16, 2016 | NTRSO | S | 21,205 | $81.35 | $1,725,027 | 63,357 Direct | -25.08% | Disposed | -77.4% (price as of 2026-08-19) |
| Nov. 16, 2016 | NTRSO | S | 4,694 | $80.86 | $379,557 | 84,562 Direct | -5.26% | Disposed | -77.3% (price as of 2026-08-19) |
| Nov. 7, 2016 | NTRSO | S 10b5-1 | 7,371 | $74.00 | $545,454 | 63,357 Direct | -10.42% | Disposed | -75.2% (price as of 2026-08-19) |
| Sept. 7, 2016 | NTRSO | S 10b5-1 | 2,960 | $70.00 | $207,200 | 64,137 Direct | -4.41% | Disposed | -73.7% (price as of 2026-08-19) |
| April 22, 2015 | NTRSO | S 10b5-1 | 2,959 | $72.95 | $215,859 | 48,313 Direct | -5.77% | Disposed | -74.8% (price as of 2026-08-19) |
| Aug. 25, 2014 | NTRSO | S 10b5-1 | 3,023 | $68.95 | $208,436 | 17,219 Direct | -14.93% | Disposed | -73.3% (price as of 2026-08-19) |
| July 24, 2014 | NTRSO | S 10b5-1 | 3,022 | $66.95 | $202,323 | 17,219 Direct | -14.93% | Disposed | -72.5% (price as of 2026-08-19) |
| May 17, 2013 | NTRSO | S 10b5-1 | 6,000 | $58.25 | $349,500 | 11,122 Direct | -35.04% | Disposed | -68.4% (price as of 2026-08-19) |
| March 5, 2013 | NTRSO | S 10b5-1 | 7,000 | $54.00 | $378,000 | 11,122 Direct | -38.63% | Disposed | -66.0% (price as of 2026-08-19) |
Showing latest 100 of 102 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| May 22, 2025 | VOYA | Restricted Stock Units | Common Stock (2,547) | — | — | 2,547 | Acquired |
| May 23, 2024 | VOYA | Restricted Stock Units | Common Stock (2,055) | — | — | 2,055 | Acquired |
| May 25, 2023 | VOYA | Restricted Stock Units | Common Stock (2,165) | — | — | 2,165 | Acquired |
| May 25, 2023 | VOYA | Restricted Stock Units | Common Stock (527) | — | — | 527 | Disposed |
| March 22, 2023 | VOYA | Restricted Stock Units | Common Stock (527) | — | — | 527 | Acquired |
| Aug. 2, 2019 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (25,867) | $58.25 | Feb. 16, 2026 | 25,867 | Disposed |
| Aug. 2, 2019 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (20,337) | $60.85 | Feb. 10, 2024 | 20,337 | Disposed |
| Aug. 9, 2018 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (21,352) | $52.69 | Feb. 11, 2023 | 21,352 | Disposed |
| April 27, 2017 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (11,399) | $52.64 | Feb. 14, 2021 | 11,399 | Disposed |
| April 27, 2017 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (11,768) | $50.99 | Feb. 15, 2020 | 11,768 | Disposed |
| Feb. 21, 2017 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (26,132) | $88.06 | Feb. 21, 2027 | 26,132 | Acquired |
| Nov. 16, 2016 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (11,455) | $43.65 | Feb. 13, 2022 | 11,455 | Disposed |
| Nov. 16, 2016 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (14,444) | $55.39 | Feb. 16, 2019 | 14,444 | Disposed |
| Nov. 7, 2016 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (7,371) | $71.23 | Feb. 19, 2018 | 7,371 | Disposed |
| Sept. 7, 2016 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (2,960) | $63.36 | Feb. 20, 2017 | 2,960 | Disposed |
| Feb. 16, 2016 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (34,489) | $58.25 | Feb. 16, 2026 | 34,489 | Acquired |
| April 22, 2015 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (2,959) | $63.36 | Feb. 20, 2017 | 2,959 | Disposed |
| Feb. 17, 2015 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (23,739) | $70.21 | Feb. 17, 2025 | 23,739 | Acquired |
| Aug. 25, 2014 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (3,023) | $52.10 | Feb. 21, 2016 | 3,023 | Disposed |
| July 24, 2014 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (3,022) | $52.10 | Feb. 21, 2016 | 3,022 | Disposed |
| Feb. 10, 2014 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (20,337) | $60.85 | Feb. 10, 2024 | 20,337 | Acquired |
| May 17, 2013 | NTRSO | Employee's Stock Option (right-to-buy) | Common Stock (6,000) | $44.46 | Feb. 15, 2015 | 6,000 | Disposed |
| March 5, 2013 | NTRSO | Employee's Stock Option (right-to-buy) | Common Stock (7,000) | $49.12 | Feb. 17, 2014 | 7,000 | Disposed |
| Feb. 11, 2013 | NTRSO | Employee Stock Option (right-to-buy) | Common Stock (21,352) | $52.69 | Feb. 11, 2023 | 21,352 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 15 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Feb. 19, 2021 | FIBK | Class A Common Stock | 0 | Direct |
| May 7, 2012 | NTRSO | Common Stock [F1] | 24,541 | Direct |
| May 7, 2012 | NTRSO | Common Stock | 9,832 | Direct |
| May 7, 2012 | NTRSO | Common Stock | 543 | Indirect |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (1,668) | 1,668 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (3,332) | 3,332 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (7,000) | 7,000 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (6,000) | 6,000 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (6,045) | 6,045 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (5,919) | 5,919 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (7,371) | 7,371 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (14,444) | 14,444 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (11,768) | 11,768 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (11,399) | 11,399 | Direct |
| May 7, 2012 | NTRSO | Employee Stock Option (right-to-buy)→ Common Stock (11,455) | 11,455 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
NTRSO
CFO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2019 | $625,000 | — | $2,310,120 | — | $930,000 | $1,027,504 | $30,259 | $4,922,883 |
| 2018 | $625,000 | — | $2,100,055 | — | $990,000 | — | $29,857 | $3,744,912 |
| 2017 | $625,000 | — | $1,518,771 | $501,209 | $900,000 | $713,100 | $29,245 | $4,287,325 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.