David O. Watson Apellis Pharmaceuticals, Inc. (APLS) insider trading activity

David O. Watson is General Counsel of Apellis Pharmaceuticals, Inc.. Currently has a direct ownership of 88,531 shares of APLS, which is worth approximately $1.8 Million. The most recent transaction as insider was on Jan 22, 2026, when has been sold 7,832 shares (Common Stock) at a price of $21.77 per share, resulting in proceeds of $170,502. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 88.5K

22.16% 3M change

38.94% 12M change

Total Value Held $1.8 Million

David O. Watson Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jan 22 2026	SELL Open market or private sale	$170,502 $21.77 p/Share	7,832 Reduced 8.13%	88,531 Common Stock
Jan 20 2026	SELL Open market or private sale	$48,980 $19.79 p/Share	2,475 Reduced 2.5%	96,363 Common Stock
Jan 13 2026	SELL Open market or private sale	$128,258 $22.19 p/Share	5,780 Reduced 5.52%	98,838 Common Stock
Jan 07 2026	BUY Exercise of conversion of derivative security	$13,275 $14.95 p/Share	888 Added 0.84%	104,618 Common Stock
Dec 16 2025	SELL Open market or private sale	$122,449 $24.49 p/Share	5,000 Reduced 4.6%	103,730 Common Stock
Nov 17 2025	SELL Open market or private sale	$100,300 $20.06 p/Share	5,000 Reduced 4.4%	108,730 Common Stock
Oct 16 2025	SELL Open market or private sale	$126,100 $25.22 p/Share	5,000 Reduced 4.21%	113,730 Common Stock

Sep 16 2025	SELL Open market or private sale	$121,700 $24.34 p/Share	5,000 Reduced 4.04%	118,730 Common Stock
Aug 18 2025	SELL Open market or private sale	$139,000 $27.8 p/Share	5,000 Reduced 3.88%	123,730 Common Stock
Jul 16 2025	SELL Open market or private sale	$97,750 $19.55 p/Share	5,000 Reduced 3.74%	128,730 Common Stock
Jun 16 2025	SELL Open market or private sale	$93,850 $18.77 p/Share	5,000 Reduced 3.6%	133,730 Common Stock
Mar 05 2025	SELL Open market or private sale	$139,781 $25.1 p/Share	5,569 Reduced 3.86%	138,730 Common Stock
Jan 29 2025	SELL Open market or private sale	$20,516 $29.52 p/Share	695 Reduced 0.48%	144,299 Common Stock
Jan 22 2025	SELL Open market or private sale	$101,118 $30.43 p/Share	3,323 Reduced 2.24%	144,994 Common Stock
Jan 21 2025	BUY Grant, award, or other acquisition	-	42,762 Added 22.38%	148,317 Common Stock
Jan 17 2025	SELL Open market or private sale	$65,941 $29.96 p/Share	2,201 Reduced 2.04%	105,555 Common Stock
Jan 13 2025	SELL Open market or private sale	$142,495 $28.7 p/Share	4,965 Reduced 4.4%	107,756 Common Stock
Dec 11 2024	SELL Open market or private sale	$171,149 $34.23 p/Share	5,000 Reduced 4.25%	112,721 Common Stock
Sep 27 2024	BUY Bona fide gift	-	10,569 Added 8.24%	117,721 Common Stock
Mar 06 2024	BUY Exercise of conversion of derivative security	$52,103 $13.85 p/Share	3,762 Added 3.39%	107,152 Common Stock
Feb 12 2024	SELL Open market or private sale	$52,928 $67.77 p/Share	781 Reduced 0.75%	103,390 Common Stock
Jan 29 2024	SELL Open market or private sale	$58,110 $64.14 p/Share	906 Reduced 0.86%	104,171 Common Stock
Jan 22 2024	SELL Open market or private sale	$271,960 $65.0 p/Share	4,184 Reduced 3.83%	105,077 Common Stock
Jan 16 2024	SELL Open market or private sale	$283,274 $66.81 p/Share	4,240 Reduced 3.74%	109,261 Common Stock
Jan 16 2024	BUY Grant, award, or other acquisition	-	23,748 Added 17.3%	113,501 Common Stock

DOW

David O. Watson

General Counsel

Waltham, MA

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