Mats Wahlstrom
CIK 1459154 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Aug. 1, 2025 · Latest: June 9, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 31 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
31 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 22, 2024 | TLSIW | P | 5,000 | $4.55 | $22,750 | 15,727 Direct | +46.61% | Acquired | -87.7% (price as of 2026-08-21) |
| Nov. 21, 2024 | TLSIW | P | 8,687 | $4.44 | $38,570 | 10,727 Direct | +425.83% | Acquired | -87.4% (price as of 2026-08-21) |
| Nov. 20, 2024 | TLSIW | P | 2,040 | $4.16 | $8,486 | 2,040 Direct | — | Acquired | -86.5% (price as of 2026-08-21) |
| Dec. 8, 2016 | CHRS | S | 46,190 | $27.52 | $1,271,149 | 0 Indirect | -100.00% | Disposed | -95.1% (price as of 2026-08-21) |
| Dec. 7, 2016 | CHRS | S | 7,393 | $27.50 | $203,308 | 46,190 Indirect | -13.80% | Disposed | -95.1% (price as of 2026-08-21) |
| Feb. 29, 2016 | CHRS | P | 1,000,000 | $22.35 | $22,350,000 | 1,000,000 Indirect | — | Acquired | -94.0% (price as of 2026-08-21) |
| Feb. 29, 2016 | CHRS | P | None | $22.35 | — | — Indirect | — | Acquired | -94.0% (price as of 2026-08-21) |
| Aug. 18, 2015 | CHRS | S | 6,372 | $33.50 | $213,462 | 578,528 Indirect | -1.09% | Disposed | -96.0% (price as of 2026-08-21) |
| Aug. 18, 2015 | CHRS | S | 6,373 | $33.50 | $213,496 | 578,527 Indirect | -1.09% | Disposed | -96.0% (price as of 2026-08-21) |
| Aug. 17, 2015 | CHRS | S | 8,028 | $33.91 | $272,229 | 584,900 Indirect | -1.35% | Disposed | -96.0% (price as of 2026-08-21) |
| Aug. 14, 2015 | CHRS | S | 116,554 | $34.24 | $3,990,809 | 592,928 Indirect | -16.43% | Disposed | -96.1% (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 10, 2025 | TLSIW | Series A Convertible Preferred Stock | Common Stock | — | — | 44,750 | Acquired |
| Aug. 13, 2024 | TLSIW | Director stock option (right to buy) | Common Stock (15,000) | $5.75 | Aug. 12, 2034 | 15,000 | Acquired |
| Aug. 10, 2023 | TLSIW | Stock Option (right to buy) | Common Stock (35,000) | $11.34 | Aug. 9, 2033 | 35,000 | Acquired |
| Jan. 11, 2019 | CHRS | Stock Option (Right to Buy) | Common Stock (20,000) | $12.37 | Jan. 11, 2029 | 20,000 | Acquired |
| Feb. 1, 2018 | CHRS | Stock Option (Right to Buy) | Common Stock (20,000) | $10.05 | Feb. 1, 2028 | 20,000 | Acquired |
| May 17, 2017 | CHRS | Stock Option (Right to Buy) | Common Stock (20,000) | $23.80 | May 17, 2027 | 20,000 | Acquired |
| May 24, 2016 | CHRS | Stock Option (Right to Buy) | Common Stock (10,000) | $18.28 | May 24, 2026 | 10,000 | Acquired |
| Feb. 29, 2016 | CHRS | 8.2% Senior Convertible Notes due 2022 [F3] | Common Stock | — | March 31, 2022 | 1,000,000 | Acquired |
| Feb. 29, 2016 | CHRS | 8.2% Senior Convertible Notes due 2022 [F3] | Common Stock | — | March 31, 2022 | — | Acquired |
| April 1, 2015 | CHRS | Stock Option (Right to Buy) | Common Stock (75,000) | $29.00 | March 31, 2025 | 75,000 | Acquired |
| April 1, 2015 | CHRS | Stock Option (Right to Buy) | Common Stock (20,000) | $29.00 | March 31, 2025 | 20,000 | Acquired |
| April 1, 2015 | CHRS | Stock Option (Right to Buy) | Common Stock (75,000) | $29.00 | March 31, 2025 | 75,000 | Acquired |
| April 1, 2015 | CHRS | Stock Option (Right to Buy) | Common Stock (20,000) | $29.00 | March 31, 2025 | 20,000 | Acquired |
| Nov. 12, 2014 | CHRS | Series C Preferred Stock | Common Stock (43,011) | — | — | 43,011 | Disposed |
| Nov. 12, 2014 | CHRS | Series C Preferred Stock | Common Stock (10,572) | — | — | 10,572 | Disposed |
| Nov. 12, 2014 | CHRS | Series C Preferred Stock | Common Stock (79,950) | — | — | 79,950 | Disposed |
| Nov. 12, 2014 | CHRS | Series B Preferred Stock | Common Stock (514,893) | — | — | 514,893 | Disposed |
| Nov. 12, 2014 | CHRS | Series B Preferred Stock | Common Stock (26,649) | — | — | 26,649 | Disposed |
| Nov. 12, 2014 | CHRS | Series B Preferred Stock | Common Stock (194,889) | — | — | 194,889 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 21 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 14, 2023 | TLSIW | Common Stock | 1,254,259 | Indirect |
| Aug. 14, 2023 | TLSIW | Common Stock | 1,370,028 | Indirect |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Stock Option (right to buy)→ Common Stock | — | Direct |
| Aug. 14, 2023 | TLSIW | Series A Convertible Preferred Stock→ Common Stock (50,000) | 50,000 | Indirect |
| Nov. 6, 2014 | CHRS | Series B Preferred Stock→ Common Stock (194,889) | 194,889 | Indirect |
| Nov. 6, 2014 | CHRS | Series B Preferred Stock→ Common Stock (514,893) | 514,893 | Indirect |
| Nov. 6, 2014 | CHRS | Series B Preferred Stock→ Common Stock (43,011) | 43,011 | Indirect |
| Nov. 6, 2014 | CHRS | Series C Preferred Stock→ Common Stock (26,649) | 26,649 | Indirect |
| Nov. 6, 2014 | CHRS | Series C Preferred Stock→ Common Stock (79,950) | 79,950 | Indirect |
| Nov. 6, 2014 | CHRS | Series C Preferred Stock→ Common Stock (10,572) | 10,572 | Indirect |
| Nov. 6, 2014 | CHRS | Stock Option (Right to Buy)→ Common Stock (29,994) | 29,994 | Direct |
| Nov. 6, 2014 | CHRS | Stock Option (Right to Buy)→ Common Stock (14,997) | 14,997 | Direct |
| Nov. 6, 2014 | CHRS | Stock Option (Right to Buy)→ Common Stock (44,991) | 44,991 | Direct |