CITADEL ADVISORS LLC

CIK

1423053

City

MIAMI

State / Country

Stock

SPOK — Spok Holdings, Inc

Top Portfolio Positions

4,269 positions · $549,594,039,539 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
SPY	Spdr S&P 500 ETF Trust	64,565,975	$41,989,836,181	7.64%
QQQ	Invesco Qqq Trust, Series 1	55,171,964	$31,844,154,181	5.79%
NVDA	Nvidia Corp Technology	137,243,161	$23,935,207,278	4.36%
TSLA	Tesla, Inc. Consumer Cyclical	63,922,509	$23,763,192,720	4.32%
GLD	Spdr Gold Trust	34,441,722	$14,819,928,559	2.70%
AAPL	Apple Inc. Technology	55,393,070	$14,058,207,235	2.56%
META	Meta Platforms, Inc. Communication Services	23,967,037	$13,712,260,878	2.49%
MSFT	Microsoft Corp Technology	32,176,424	$11,910,746,871	2.17%
AMZN	Amazon Com Inc Consumer Cyclical	51,582,437	$10,743,074,153	1.95%
MU	Micron Technology Inc Technology	31,629,772	$10,685,802,171	1.94%

Portfolio Trend

25 quarters · across all stocks

Holdings in SPOK

Compact Export CSV

Shares Held

Position Value (USD)

50 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$193,746	17,775	-64.2%	Shares	Defined	2026-05-15
2025-12-31	$655,437	49,692	+307.3%	Shares	Defined	2026-02-17
2025-12-31	$160,918	12,200	-34.4%	Call	Defined	2026-02-17
2025-12-31	$245,334	18,600	-20.4%	Put	Defined	2026-02-17
2025-09-30	$402,908	23,357	-64.3%	Shares	Defined	2025-11-14
2025-06-30	$1,156,571	65,417	-57.6%	Shares	Defined	2025-08-14
2025-03-31	$2,537,020	154,320	+864.5%	Shares	Defined	2025-05-15
2025-03-31	$263,040	16,000	+661.9%	Call	Defined	2025-05-15
2025-03-31	$34,524	2,100	-93.2%	Put	Defined	2025-05-15
2024-12-31	$494,532	30,812	+106.8%	Shares	Defined	2025-02-14
2024-12-31	$239,145	14,900	+198.0%	Call	Defined	2025-02-14
2024-12-31	$80,250	5,000	-93.9%	Put	Defined	2025-02-14
2024-09-30	$1,241,801	82,457	+581.5%	Shares	Defined	2024-11-14
2024-09-30	$182,226	12,100	+112.3%	Call	Defined	2024-11-14
2024-09-30	$85,842	5,700	+147.8%	Put	Defined	2024-11-14
2024-06-30	$34,063	2,300	-75.8%	Put	Defined	2024-08-14
2024-06-30	$140,695	9,500	-88.1%	Call	Defined	2024-08-14
2024-03-31	$1,277,196	80,075	+535.5%	Shares	Defined	2024-05-15
2024-03-31	$200,970	12,600	-23.2%	Call	Defined	2024-05-15
2024-03-31	$261,580	16,400	+5.8%	Put	Defined	2024-05-15
2023-12-31	$239,940	15,500	-61.3%	Call	Defined	2024-02-14
2023-12-31	$619,401	40,013	+181.8%	Shares	Defined	2024-02-14
2023-12-31	$219,816	14,200	+20.3%	Put	Defined	2024-02-14
2023-09-30	$168,386	11,800	+10530.6%	Call	Defined	2023-11-14
2023-09-30	$1,583	111	-99.5%	Shares	Defined	2023-11-14
2023-09-30	$336,772	23,600	-49.5%	Put	Defined	2023-11-14
2023-06-30	$620,643	46,700	+176.2%	Put	Defined	2023-08-14
2023-06-30	$224,693	16,907	+125.4%	Shares	Defined	2023-08-14
2023-06-30	$99,675	7,500	-59.6%	Call	Defined	2023-08-14
2023-03-31	$187,972	18,556	-12.5%	Shares	Defined	2023-05-15
2023-03-31	$214,756	21,200	+271.9%	Put	Defined	2023-05-15
2023-03-31	$57,741	5,700	-85.9%	Call	Defined	2023-05-15
2022-12-31	$330,425	40,345	+561.4%	Shares	Defined	2023-02-14
2022-12-31	$49,959	6,100	+1120.0%	Call	Defined	2023-02-14
2022-12-31	$4,095	500	-98.6%	Put	Defined	2023-02-14
2022-09-30	$276,568	36,200	+162.3%	Call	Defined	2022-11-14
2022-09-30	$105,432	13,800	-28.1%	Put	Defined	2022-11-14
2022-09-30	$146,580	19,186	-53.5%	Shares	Defined	2022-11-14
2022-06-30	$259,667	41,217	+131.6%	Shares	Defined	2022-08-15
2022-06-30	$112,140	17,800	-36.4%	Put	Defined	2022-08-15
2022-03-31	$223,440	28,000	+86.7%	Put	Defined	2022-05-16
2022-03-31	$119,700	15,000	-62.4%	Call	Defined	2022-05-16
2022-03-31	$317,986	39,848	+90.7%	Shares	Defined	2022-05-16
2021-12-31	$194,997	20,900	-70.5%	Put	Defined	2022-02-14
2021-12-31	$660,815	70,827	+31.6%	Shares	Defined	2022-02-14
2021-09-30	$549,836	53,800	-38.5%	Put	Defined	2021-11-15
2021-09-30	$894,627	87,537	+234.1%	Shares	Defined	2021-11-15
2021-06-30	$252,044	26,200	-69.2%	Put	Defined	2021-08-16
2021-06-30	$818,786	85,113	+281.7%	Shares	Defined	2021-08-16
2021-03-31	$233,895	22,297	—	Shares	Defined	2021-05-21
No 13F history on record for this holder in this stock.