Barbara Klencke

Insider

First SEC filing: March 5, 2026 · Latest: March 5, 2026

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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.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 15 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

15 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 16, 2026	XNCR	A	20,604	—	—	20,604 Direct	—	Acquired	(price as of 2026-08-20)
June 16, 2026	XNCR	A	10,302	—	—	29,974 Direct	+52.37%	Acquired	(price as of 2026-08-20)
May 20, 2026	TCRX	A	67,000	—	—	67,000 Direct	—	Acquired	(price as of 2026-08-20)
April 16, 2026	ALXO	A	100,000	—	—	100,000 Direct	—	Acquired	(price as of 2026-08-20)
March 3, 2026	ALXO	A	700,000	—	—	700,000 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 17, 2025	ALXO	A	300,000	—	—	300,000 Direct	—	Acquired	(price as of 2026-08-20)
June 30, 2025	TCRX	A	67,000	—	—	67,000 Direct	—	Acquired	(price as of 2026-08-20)
June 12, 2025	XNCR	A	27,372	—	—	27,372 Direct	—	Acquired	(price as of 2026-08-20)
June 12, 2025	XNCR	A	13,686	—	—	19,672 Direct	+228.63%	Acquired	(price as of 2026-08-20)
Sept. 23, 2024	TCRX	P	5,000	$5.29	$26,450	45,000 Direct	+12.50%	Acquired	-85.8% (price as of 2026-08-20)
Aug. 26, 2024	TCRX	P	5,000	$5.53	$27,650	40,000 Direct	+14.29%	Acquired	-86.4% (price as of 2026-08-20)
Aug. 23, 2024	TCRX	P	5,000	$5.69	$28,450	35,000 Direct	+16.67%	Acquired	-86.8% (price as of 2026-08-20)
June 13, 2024	XNCR	A	11,971	—	—	11,971 Direct	—	Acquired	(price as of 2026-08-20)
June 13, 2024	XNCR	A	5,986	—	—	5,986 Direct	—	Acquired	(price as of 2026-08-20)
June 12, 2024	TCRX	A	47,500	—	—	47,500 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 14, 2023	TCRX	P	5,000	$5.08	$25,400	30,000 Direct	+20.00%	Acquired	-85.2% (price as of 2026-08-20)
Sept. 15, 2023	XNCR	A	40,070	—	—	40,070 Direct	—	Acquired	(price as of 2026-08-20)
June 13, 2023	TCRX	A	36,524	—	—	36,524 Direct	—	Acquired	(price as of 2026-08-20)
April 6, 2023	TCRX	A	9,146	—	—	9,146 Direct	—	Acquired	(price as of 2026-08-20)

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
June 16, 2026	XNCR	Stock Option (Right to Buy)	Common Stock (20,604)	$12.20	June 15, 2036	20,604	Acquired
May 20, 2026	TCRX	Stock Option (Right to Buy)	Voting Common Stock (67,000)	$0.99	May 20, 2036	67,000	Acquired
April 16, 2026	ALXO	Stock option (right to buy)	Common Stock (100,000)	$1.68	April 15, 2036	100,000	Acquired
March 3, 2026	ALXO	Stock option (right to buy)	Common Stock (700,000)	$2.07	March 2, 2036	700,000	Acquired
Sept. 17, 2025	ALXO	Stock option (right to buy)	Common Stock (300,000)	$1.05	Sept. 16, 2035	300,000	Acquired
June 30, 2025	TCRX	Stock Option (Right to Buy)	Voting Common Stock (67,000)	$1.45	June 30, 2035	67,000	Acquired
June 12, 2025	XNCR	Stock Option (Right to Buy)	Common Stock (27,372)	$9.43	June 11, 2035	27,372	Acquired
June 13, 2024	XNCR	Stock Option (Right to Buy)	Common Stock (11,971)	$21.31	June 12, 2034	11,971	Acquired
June 12, 2024	TCRX	Stock Option (Right to Buy)	Voting Common Stock (47,500)	$8.88	June 11, 2034	47,500	Acquired
Sept. 15, 2023	XNCR	Stock Option (Right to Buy)	Common Stock (40,070)	$20.69	Sept. 15, 2033	40,070	Acquired
June 13, 2023	TCRX	Stock Option (Right to Buy)	Voting Common Stock (36,524)	$2.66	June 12, 2033	36,524	Acquired
April 6, 2023	TCRX	Stock Option (Right to Buy)	Voting Common Stock (9,146)	$2.20	April 5, 2033	9,146	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 9 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
March 5, 2026	ALXO	Common Stock	60,000	Direct
March 5, 2026	ALXO	Common Stock	60,000	Indirect
March 5, 2026	ALXO	Stock option (right to buy)→ Common Stock (40,400)	40,400	Direct
March 5, 2026	ALXO	Stock option (right to buy)→ Common Stock (300,000)	300,000	Direct
March 5, 2026	ALXO	Stock option (right to buy)→ Common Stock (100,000)	100,000	Direct
Jan. 23, 2025	ALXO	Common Stock	60,000	Direct
Jan. 23, 2025	ALXO	Common Stock	60,000	Indirect
April 10, 2023	TCRX	Voting Common Stock	25,000	Direct
April 10, 2023	TCRX	Voting Common Stock	25,000	Indirect