SINGER DAVID B

Director at AFFYMETRIX INC · on record since Feb 14, 2006
Director at OSCIENT PHARMACEUTICALS CORP · on record since May 31, 2006
Director at transaction date at OSCIENT PHARMACEUTICALS CORP · on record since Feb 9, 2007
Director at CORCEPT THERAPEUTICS INC · on record since Feb 13, 2008
Director at Infleqtion, Inc. · on record since Apr 14, 2026
Director at PACIFIC BIOSCIENCES OF CALIFORNIA, INC. · on record since Oct 27, 2010
Director at CASTLIGHT HEALTH, INC. · on record since Mar 13, 2014
Director at 1Life Healthcare Inc · on record since Jan 30, 2020
Director at Seer, Inc. · on record since Dec 11, 2020
10% owner at Seer, Inc. · on record since Dec 11, 2020

Insider trading activity of SINGER DAVID B

Transactions on record: 298; since Sep 11, 2003

Open-market buys: 0

Open-market sells: 108; $261.8M

Companies traded: 8; last filing May 29, 2026

Figures computed from official regulatory filings — .

Companies where SINGER DAVID B has traded

Infleqtion, Inc.40 tx · $258.1M · May 29, 2026
CASTLIGHT HEALTH, INC.9 tx · Feb 18, 2022
1Life Healthcare Inc6 tx · Jul 19, 2021
Seer, Inc.14 tx · Jun 22, 2021
PACIFIC BIOSCIENCES OF CALIFORNIA, INC.3 tx · Jun 15, 2012
CORCEPT THERAPEUTICS INC14 tx · $276.1K · Feb 13, 2008
125 tx · $3M · Jun 15, 2007
87 tx · $1.1M · Feb 9, 2007

Track record of SINGER DAVID B

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of SINGER DAVID B

Co-insiders of SINGER DAVID B

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	311,208	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,353	17.91 USD	$24.2K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-810,384	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-1,386,029	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-7,277	16.85 USD	$122.6K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-12,310	17.91 USD	$220.4K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-460,072	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	349,693	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-660,901	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-758,561	15.29 USD	$11.6M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	321,623	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,541,092	16.05 USD	$24.7M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-508,549	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-169,411	16.05 USD	$2.7M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-66,194	16.85 USD	$1.1M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-332,639	15.98 USD	$5.3M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-603,707	15.98 USD	$9.6M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	83,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,376,716	15.29 USD	$21M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	350,115	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	-1,551,021	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	349,693	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	83,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	-2,448,979	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 27, 2026	Sell	-55,939	14.69 USD	$821.9K	Unusual size	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	311,208	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,353	17.91 USD	$24.2K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-810,384	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-1,386,029	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-7,277	16.85 USD	$122.6K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-12,310	17.91 USD	$220.4K		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-460,072	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	349,693	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-660,901	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-758,561	15.29 USD	$11.6M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	321,623	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,541,092	16.05 USD	$24.7M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	-508,549	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-169,411	16.05 USD	$2.7M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-66,194	16.85 USD	$1.1M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-332,639	15.98 USD	$5.3M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-603,707	15.98 USD	$9.6M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	83,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Sell	-1,376,716	15.29 USD	$21M		SEC
Infleqtion, Inc.Listing unverified	May 29, 2026	Other	350,115	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	-1,551,021	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	349,693	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	83,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 28, 2026	Other	-2,448,979	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Infleqtion, Inc.Listing unverified	May 27, 2026	Sell	-55,939	14.69 USD	$821.9K	Unusual size	SEC