Compass Therapeutics (CMPX)

Compass Therapeutics on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as biological products, (no diagnostic substances).

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41.8M

Short interest

settlement 2026-10-15

5.6

Days to cover

-0.7 days vs prior

47.2%

Short share of volume

2026-11-02

11,592

Fails to deliver

settlement 2026-10-14

Wed 4 Nov

Next earnings

estimated date

$21K

Insider flow, 90 days

2 buys, 0 sells

As of 2026-11-02.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 15 October 2026, short interest in CMPX is 41,844,192 shares, up 196,680 shares over the last month. Over the last 48 readings it ranged from 1,225,366 shares (15 November 2024) to 41,844,192 shares (15 October 2026). The latest reading sits at the top of that range. At the reported average volume of 7.5M shares a day that is 5.6 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	41,844,192	+3.7%	7,503,565	5.58
2026-09-30	40,357,710	-3.1%	6,449,901	6.26
2026-09-15	41,647,512	+2.1%	2,605,174	15.99
2026-08-31	40,788,891	+1.5%	2,362,777	17.26
2026-08-14	40,197,938	+0.8%	4,110,600	9.78
2026-07-31	39,874,250	+1.5%	2,263,276	17.62
2026-07-15	39,298,468	+5.8%	2,508,245	15.67
2026-06-30	37,138,819	+14.3%	4,179,584	8.89
2026-06-15	32,497,225	-2.3%	3,428,987	9.48
2026-05-29	33,270,343	+7.3%	5,192,302	6.41
2026-05-15	31,022,699	+2.0%	7,630,894	4.07
2026-04-30	30,416,716	+16.7%	22,577,897	1.35
2026-04-15	26,068,017	-0.2%	2,765,181	9.43
2026-03-31	26,127,480	+9.7%	2,168,395	12.05
2026-03-13	23,817,914	+3.5%	2,015,504	11.82
2026-02-27	23,008,490	+2.9%	1,875,673	12.27
2026-02-13	22,364,641	+2.0%	1,978,738	11.30
2026-01-30	21,933,707	-4.6%	2,220,498	9.88
2026-01-15	22,994,014	+6.5%	2,949,799	7.80
2025-12-31	21,587,650	+16.6%	2,011,937	10.73
2025-12-15	18,506,099	+6.3%	1,670,969	11.08
2025-11-28	17,414,818	+4.9%	2,098,390	8.30
2025-11-14	16,608,425	-0.5%	2,149,649	7.73
2025-10-31	16,699,205	+8.7%	1,802,942	9.26
2025-10-15	15,358,838	+3.7%	1,775,446	8.65
2025-09-30	14,815,308	+22.0%	1,822,738	8.13
2025-09-15	12,141,511	+18.4%	916,972	13.24
2025-08-29	10,251,661	+7.6%	1,023,000	10.02
2025-08-15	9,525,164	+17.5%	1,777,447	5.36
2025-07-31	8,108,960	+3.4%	734,032	11.05
2025-07-15	7,842,888	+6.1%	752,874	10.42
2025-06-30	7,392,714	+0.1%	950,288	7.78
2025-06-13	7,389,202	-0.6%	969,375	7.62
2025-05-30	7,432,323	+7.5%	545,141	13.63
2025-05-15	6,912,500	-9.4%	1,000,290	6.91
2025-04-30	7,629,122	-6.6%	712,726	10.70
2025-04-15	8,169,591	+23.4%	4,155,571	1.97
2025-03-31	6,618,254	+43.6%	971,593	6.81
2025-03-14	4,607,296	+24.7%	786,595	5.86
2025-02-28	3,695,821	+4.6%	921,599	4.01
2025-02-14	3,534,626	+28.6%	1,117,509	3.16
2025-01-31	2,748,956	-13.7%	1,786,592	1.54
2025-01-15	3,186,528	+44.1%	4,025,714	1.00
2024-12-31	2,210,789	+5.2%	333,111	6.64
2024-12-13	2,102,394	+44.8%	418,133	5.03
2024-11-29	1,451,920	+18.5%	493,967	2.94
2024-11-15	1,225,366	-31.4%	599,813	2.04
2024-10-31	1,786,958	-19.0%	509,297	3.51

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of CMPX volume is 47.2%, up 1.1 points over the last five sessions. Over the last 30 readings it ranged from 22.7% (9 October 2026) to 59.5% (1 October 2026). The latest reading is 2.7 points above the 30-session average of 44.5%, on 856K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-11-02	404K	856K	47.2%	0
2026-10-30	627K	1.8M	35.3%	0
2026-10-29	407K	909K	44.8%	3,652
2026-10-28	348K	590K	59.1%	0
2026-10-27	232K	870K	26.7%	0
2026-10-26	498K	1.1M	46.0%	0
2026-10-23	436K	1.3M	34.8%	3
2026-10-22	415K	1.2M	34.6%	0
2026-10-21	293K	710K	41.3%	0
2026-10-20	343K	933K	36.8%	2,300
2026-10-19	971K	1.9M	51.7%	14,606
2026-10-16	293K	811K	36.1%	0
2026-10-15	638K	1.8M	35.3%	11,499
2026-10-14	1.5M	3.3M	44.7%	0
2026-10-13	1.3M	2.5M	54.1%	0
2026-10-12	1.6M	3.0M	53.6%	0
2026-10-09	420K	1.8M	22.7%	4,142
2026-10-08	2.0M	3.8M	53.3%	0
2026-10-07	725K	1.5M	47.1%	6,179
2026-10-06	2.3M	5.0M	45.9%	5,675
2026-10-05	5.9M	11.9M	49.8%	11,186
2026-10-02	6.8M	14.3M	47.3%	294,850
2026-10-01	4.0M	6.8M	59.5%	20,579
2026-09-30	1.4M	2.5M	54.0%	85,962
2026-09-29	805K	1.5M	52.1%	2,519
2026-09-28	746K	1.5M	50.5%	2,577
2026-09-25	795K	1.7M	47.6%	7,984
2026-09-24	1.1M	2.6M	44.2%	130
2026-09-23	1.6M	3.7M	43.2%	149,172
2026-09-22	5.2M	14.4M	36.1%	620,934

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 14 October 2026, the fails-to-deliver balance in CMPX is 11,592 shares, down 55,804 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (23 July 2026) to 500,000 shares (3 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-10-14	11,592	$0.86	$10K
2026-10-13	67,396	$0.94	$63K
2026-10-07	59,820	$1.00	$60K
2026-10-01	38,898	$1.04	$40K
2026-09-30	3,233	$1.10	$4K
2026-09-29	31,985	$1.11	$36K
2026-08-31	8,591	$2.40	$21K
2026-08-27	9	$2.43	$22
2026-08-14	269,806	$2.26	$610K
2026-08-13	274,905	$2.37	$652K
2026-08-12	287,733	$2.20	$633K
2026-08-11	299,986	$2.22	$666K
2026-08-03	1,235	$1.91	$2K
2026-07-29	6	$2.04	$12
2026-07-23	4	$2.04	$8
2026-07-21	91,997	$2.02	$186K
2026-07-17	10,004	$2.10	$21K
2026-07-16	399	$2.14	$854
2026-06-26	31	$2.07	$64
2026-06-24	401	$2.06	$826
2026-06-18	22	$2.05	$45
2026-06-09	319	$2.02	$644
2026-06-08	39	$2.04	$80
2026-06-04	334,064	$2.10	$702K
2026-06-03	500,000	$2.08	$1.0M
2026-06-01	730	$2.38	$2K
2026-05-27	160,842	$2.20	$354K
2026-05-26	207,230	$2.07	$429K
2026-05-22	17,873	$1.93	$34K
2026-05-14	35	$1.97	$69

Insider trades

SEC Form 4, newest first. JSON

Insiders at CMPX reported 2 open-market buys worth $21K in the last 90 days and no open-market sells. Latest filing: Lerner Neil (Chief Accounting Officer) on 2026-10-01.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-10-01	Lerner Neil	Chief Accounting Officer	Buy	20K	$0.92	$18K	420K
2026-09-24	Lerner Neil	Chief Accounting Officer	Buy	3K	$1.14	$3K	400K
2026-04-29	Anderman Jonathan	General Counsel	Buy	25K	$1.89	$47K	196K
2026-04-29	Lerner Neil	Chief Accounting Officer	Buy	15K	$1.89	$28K	398K
2026-04-29	Lerner Neil	Chief Accounting Officer	Grant	15K	$1.89	$28K	398K
2026-04-29	Anderman Jonathan	General Counsel	Grant	25K	$1.89	$47K	196K
2026-02-08	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Tax withholding	37K	$6.52	$239K	6.6M
2026-01-09	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Tax withholding	47K	$5.35	$250K	6.6M
2026-01-02	Shin Barry	CFO	Grant	125K	$5.17	$646K	525K
2026-01-02	Schuetz Thomas J.	CEO	Grant	250K	$5.17	$1.3M	6.7M
2026-01-02	Lerner Neil	Chief Accounting Officer	Grant	63K	$5.17	$323K	383K
2026-01-02	Anderman Jonathan	General Counsel	Grant	150K	$5.17	$776K	171K
2025-11-16	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Tax withholding	44K	$4.83	$213K	6.4M
2025-05-27	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	10K	$2.11	$21K	6.5M
2025-04-09	OrbiMed Capital GP VI LLC	Director,TenPercentOwner	Sell	3.6M	$1.59	$5.7M	0
2025-04-09	GORDON CARL L	Director,TenPercentOwner	Sell	3.6M	$1.59	$5.7M	0
2025-04-07	Lerner Neil	CHIEF ACCOUNTING OFFICER	Buy	20K	$1.42	$28K	320K
2025-04-07	Anderman Jonathan	Gen Counsel & Corporate Sec	Buy	20K	$1.54	$31K	21K
2025-02-08	Schuetz Thomas J.	CEO	Tax withholding	42K	$3.50	$146K	6.5M
2025-01-09	Schuetz Thomas J.	CEO	Tax withholding	58K	$1.86	$108K	6.5M
2024-12-09	Shin Barry	CFO	Grant	400K	$1.65	$660K	400K
2024-02-08	Schuetz Thomas J.	PRESIDENT	Tax withholding	45K	$1.45	$65K	6.6M
2024-02-08	Bisker-Leib Vered	CHIEF EXECUTIVE OFFICER	Tax withholding	49K	$1.45	$71K	3.1M
2024-01-09	Schuetz Thomas J.	President of R&D	Grant	638K	$1.93	$1.2M	6.6M
2024-01-09	Bisker-Leib Vered	Chief Executive Officer	Grant	1.8M	$1.93	$3.4M	3.2M
2023-11-17	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Tax withholding	44K	$1.50	$66K	6.0M
2023-11-17	Bisker-Leib Vered	Chief Operating Officer	Tax withholding	64K	$1.50	$97K	1.4M
2023-03-10	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	10K	$3.37	$34K	6.0M
2023-02-27	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$3.98	$80K	6.0M
2023-02-15	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$3.86	$77K	6.0M
2023-02-08	Bisker-Leib Vered	Chief Operating Officer	Grant	400K	$0.00	$0	1.5M
2023-02-08	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Grant	500K	$0.00	$0	6.0M
2023-01-31	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$4.05	$81K	5.5M
2023-01-24	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$4.19	$84K	5.5M
2022-11-25	Bisker-Leib Vered	Chief Operating Officer	Sell	2	$4.36	$9	1.1M
2022-11-23	Bisker-Leib Vered	Chief Operating Officer	Sell	10K	$4.30	$41K	1.1M
2022-11-22	Bisker-Leib Vered	Chief Operating Officer	Sell	15K	$4.19	$63K	1.1M
2022-11-21	Bisker-Leib Vered	Chief Operating Officer	Sell	16K	$4.34	$70K	1.1M
2022-11-18	Bisker-Leib Vered	Chief Operating Officer	Sell	6K	$4.40	$27K	1.1M
2022-11-08	GORDON CARL L	Director,TenPercentOwner	Buy	402K	$3.21	$1.3M	15.2M
2022-11-08	ORBIMED ADVISORS LLC	Director,TenPercentOwner	Buy	402K	$3.21	$1.3M	15.2M
2022-09-28	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	10K	$2.32	$23K	5.4M
2022-09-26	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$2.27	$34K	5.4M
2022-09-07	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$3.03	$45K	5.4M
2022-09-01	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$2.83	$42K	5.4M
2022-08-17	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$3.05	$46K	5.4M
2022-08-10	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$2.64	$40K	5.4M
2022-08-01	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	15K	$2.58	$39K	5.3M
2022-06-21	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$2.80	$56K	5.3M
2022-06-16	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$2.34	$47K	5.3M
2022-06-13	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	30K	$2.29	$69K	5.3M
2022-06-06	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	30K	$2.83	$85K	5.3M
2022-06-01	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$3.03	$61K	5.2M
2022-05-26	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$3.04	$61K	5.2M
2022-05-23	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	18K	$2.72	$50K	5.2M
2022-05-17	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	20K	$2.47	$50K	5.2M
2022-05-13	ORBIMED ADVISORS LLC	Director,TenPercentOwner	Buy	31K	$2.49	$76K	14.8M
2022-05-13	GORDON CARL L	Director,TenPercentOwner	Buy	31K	$2.49	$76K	14.8M
2022-05-12	ORBIMED ADVISORS LLC	Director,TenPercentOwner	Buy	97K	$2.35	$228K	14.8M
2022-05-12	GORDON CARL L	Director,TenPercentOwner	Buy	97K	$2.35	$228K	14.8M
2022-05-11	ORBIMED ADVISORS LLC	Director,TenPercentOwner	Buy	65K	$1.79	$116K	14.7M
2022-05-11	GORDON CARL L	Director,TenPercentOwner	Buy	65K	$1.79	$116K	14.7M
2022-05-10	Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER	Buy	28K	$1.80	$50K	5.2M
2022-05-10	GORDON CARL L	Director,TenPercentOwner	Buy	24K	$1.60	$39K	14.6M
2022-05-10	OrbiMed Capital GP V LLC	Director,TenPercentOwner	Buy	24K	$1.60	$39K	14.6M
2022-05-09	GORDON CARL L	Director,TenPercentOwner	Buy	91K	$1.56	$142K	14.6M
2022-05-09	OrbiMed Capital GP V LLC	Director,TenPercentOwner	Buy	91K	$1.56	$142K	14.6M
2022-05-06	GORDON CARL L	Director,TenPercentOwner	Buy	10K	$1.63	$17K	14.5M
2022-05-06	OrbiMed Capital GP V LLC	Director,TenPercentOwner	Buy	10K	$1.63	$17K	14.5M
2021-11-16	Bisker-Leib Vered	Chief Operating Officer	Grant	600K	$0.00	$0	1.1M
2021-11-16	Schuetz Thomas J.	Chief Executive Officer	Grant	600K	$0.00	$0	5.1M
2021-11-04	OrbiMed Genesis GP LLC	Director,TenPercentOwner	Buy	3.6M	$3.50	$12.5M	3.6M
2021-11-04	OrbiMed Genesis GP LLC	Director,TenPercentOwner	Buy	1.8M	$3.50	$6.3M	14.5M
2021-11-04	GORDON CARL L	Director,TenPercentOwner	Buy	3.6M	$3.50	$12.5M	3.6M
2021-11-04	GORDON CARL L	Director,TenPercentOwner	Buy	1.8M	$3.50	$6.3M	14.5M
2021-06-25	Toledano Miranda Jayne	Director	Other transaction	1.8M	price not stated in the filing	not stated	1.8M
2020-06-19	ORBIMED ADVISORS LLC	Director,TenPercentOwner	Buy	1.5M	$5.00	$7.3M	12.7M
2020-06-19	GORDON CARL L	Director,TenPercentOwner	Buy	1.5M	$5.00	$7.3M	12.7M
2020-06-19	Ferneau Philip	Director	Buy	250K	$5.00	$1.3M	400K
2020-06-19	Ferneau Philip	Director	Buy	64K	$5.00	$320K	2.3M
2020-06-19	Schuetz Thomas J.	Chief Executive Officer	Buy	97K	$5.00	$487K	4.5M
2020-06-19	Sunderland Julie	Director	Buy	289K	$5.00	$1.4M	2.5M

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

5 holders report 5% or more of CMPX in their latest filing, all on Schedule 13G (passive). The largest reported stake is KEVIN TANG at 10.0% of the class (17,176,510 shares), filed 2025-11-14 for an event on 2025-09-30.

Filed	Form	Holder	Shares	Of class	Event
2026-08-14	13G/Ano. 1	Vivo Opportunity, LLCother entity	7.2M	4.0%	2026-06-30
2026-08-14	13G/Ano. 1	Vivo Opportunity Fund Holdings, L.P.partnership	7.2M	4.0%	2026-06-30
2026-08-14	13G/Ano. 1	Vivo Opportunity Cayman Fund, L.P.partnership	549K	0.3%	2026-06-30
2026-08-14	13G/Ano. 1	Vivo Opportunity Cayman, LLCother entity	549K	0.3%	2026-06-30
2026-08-07	13G	STATE STREET CORPORATIONparent holding company	10.0M	5.5%	2026-06-30
2026-05-15	13G/Ano. 1	BVF PARTNERS L P/ILinvestment adviser, partnership	7.8M	4.3%	2026-03-31
2026-05-15	13G/Ano. 1	LAMPERT MARK Nindividual	7.8M	4.3%	2026-03-31
2026-05-15	13G/Ano. 1	BVF INC/ILcorporation	7.8M	4.3%	2026-03-31
2026-05-15	13G/Ano. 1	BVF GP HOLDINGS LLCother entity	7.2M	4.0%	2026-03-31
2026-05-15	13G/Ano. 1	BIOTECHNOLOGY VALUE FUND L Ppartnership	4.1M	2.3%	2026-03-31
2026-05-15	13G/Ano. 1	BVF I GP LLCother entity	4.1M	2.3%	2026-03-31
2026-05-15	13G/Ano. 1	BVF II GP LLCother entity	3.0M	1.7%	2026-03-31
2026-05-15	13G/Ano. 1	BIOTECHNOLOGY VALUE FUND II LPpartnership	3.0M	1.7%	2026-03-31
2026-05-15	13G/Ano. 1	Biotechnology Value Trading Fund OS LPpartnership	476K	0.3%	2026-03-31
2026-05-15	13G/Ano. 1	BVF Partners OS Ltd.corporation	476K	0.3%	2026-03-31
2026-02-13	13G/Ano. 1	Blackstone Inc.corporation	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Blackstone Alternative Asset Management Associates LLCother entity	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Blackstone Holdings II L.P.partnership	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Blackstone Holdings I/II GP L.L.C.other entity	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Blackstone Group Management L.L.C.other entity	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Stephen A. Schwarzmanindividual	6.1M	3.4%	2025-12-31
2026-02-13	13G/Ano. 1	Spruce Street Aggregator L.P.partnership	3.7M	2.1%	2025-12-31
2026-02-13	13G/Ano. 1	Blackstone Annex Master Fund L.P.partnership	2.4M	1.4%	2025-12-31
2026-01-21	13G	BlackRock, Inc.parent holding company	9.3M	5.2%	2025-12-31
2025-11-14	13G/Ano. 3	KEVIN TANGindividual	17.2M	10.0%	2025-09-30
2025-11-14	13G/Ano. 3	TANG CAPITAL MANAGEMENT, LLCother entity	17.2M	10.0%	2025-09-30
2025-11-14	13G/Ano. 3	TANG CAPITAL PARTNERS, LPpartnership	10.3M	6.0%	2025-09-30
2025-11-14	13G/Ano. 3	TANG CAPITAL PARTNERS INTERNATIONAL, LPpartnership	5.6M	3.2%	2025-09-30
2025-11-14	13G/Ano. 3	TANG CAPITAL PARTNERS III, INCcorporation	1000K	0.6%	2025-09-30
2025-11-14	13G/Ano. 3	TANG CAPITAL PARTNERS IV, INCcorporation	333K	0.2%	2025-09-30

13F holders

Tracked managers holding CMPX at their latest 13F. JSON

7 of the 30 tracked managers held CMPX at their latest 13F, $31.5M in total at quarter-end prices. Millennium Management is the largest at $10.3M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 0 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Millennium Management	2026-06-30	4.7M	$10.3M	0.00%	+3.9M
Citadel Advisors	2026-06-30	3.6M	$7.8M	0.00%	+2.8M
AQR Capital Management	2026-06-30	3.5M	$7.7M	0.00%	+3.3M
Fisher Asset Management	2026-06-30	1.4M	$3.0M	0.00%	+44K
Point72 Asset Management	2026-06-30	687K	$1.5M	0.00%	new
Two Sigma Investments	2026-06-30	320K	$701K	0.00%	+287K
D. E. Shaw & Co.	2026-06-30	204K	$448K	0.00%	+139K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

Compass Therapeutics in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Compass Therapeutics (CMPX), SEC CIK 1738021, listed on Nasdaq, classified by the SEC as biological products, (no diagnostic substances). The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-14.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-01.JSON and CSV
Company record: EDGAR filing index for CIK 1738021Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as biological products, (no diagnostic substances)

Other company pages

Datasets

Frequently Asked Questions

How much of CMPX is sold short?

41,844,192 shares were held short at the 2026-10-15 settlement, 5.6 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is CMPX's daily short volume?

On 2026-11-02, 404,160 of the 856,373 CMPX shares reported to FINRA were sold short, 47.2% of the day's reported volume. Short volume is a flow for one day, not a position.

Does CMPX have fails to deliver?

The SEC's latest file shows 11,592 CMPX shares failed to deliver at settlement 2026-10-14. Fails are reported per settlement date and published twice a month with a lag.

Are CMPX insiders buying or selling?

Insiders at CMPX reported 2 open-market buys worth $21K in the last 90 days and no open-market sells. Latest filing: Lerner Neil (Chief Accounting Officer) on 2026-10-01.

Who owns 5% or more of CMPX?

Which tracked 13F managers own CMPX?

7 of the 30 tracked 13F managers held CMPX shares at their latest filing, $31.5M in all. The largest: Izzy Englander's Millennium Management (4.7M shares, $10.3M), Ken Griffin's Citadel Advisors (3.6M shares, $7.8M), Cliff Asness's AQR Capital Management (3.5M shares, $7.7M), Ken Fisher's Fisher Asset Management (1.4M shares, $3.0M), Steve Cohen's Point72 Asset Management (687K shares, $1.5M), Two Sigma Investments (320K shares, $701K). The table above lists all 7.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.