Siren, L.L.C.

$3.6B reported 13(f) long value · latest quarter 2026-03-31 · CIK 2005245 · EDGAR ↗

sum of disclosed values for 2026-03-31; 0 positions carry a NULL value and are excluded from the sum, surfaced here rather than folded away: $3.6B
ALL retained default holdings for this (filer, period), including NULL-value ones: 102
positions with no comparable holding in the prior quarter (kind new), 2026-03-31: 19
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record: 32

A quarter-end snapshot. Filed up to 45 days later, so this page is not current holdings and never a complete portfolio. what a 13F is — and is not ↓ methodology §13F ↗

Position changes — into 2026-03-31

by shares · Δ value · filing link · how changes are classified §

Position changes into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match `identity_reconciled_by_cusip`	the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE `classified_by_value` · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake	derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero	reported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated `shares_unit_mismatch`	Prev value	Curr value	Prev shares	Curr shares
position key `pos:12598` · issuer key `iss:1082` COM	TRIM	+$9.7M	−100,000	$256M	$265M	3,286,830	3,186,830
position key `pos:11747` · issuer key `iss:680` COM	ADD	+$149M	+2,486,997	$32.6M	$182M	8,757,249	11,244,246
position key `pos:11808` · issuer key `iss:635` COM	TRIM	+$27.1M	−99,727	$112M	$140M	4,529,990	4,430,263
position key `pos:14374` · issuer key `iss:248` SPONSORED ADS	TRIM	−$13.8M	−35,000	$152M	$138M	500,000	465,000
position key `pos:11535` · issuer key `iss:1757` COM	TRIM	+$46.0M	−2,508,269	$72.3M	$118M	8,165,374	5,657,105
position key `sid:sec:prov:b23dd6a0ecec2737a5c87e9c74cf430d` · issuer key `cusip6:055477` COM	ADD	+$27.6M	+586,001	$87.8M	$115M	5,216,969	5,802,970
position key `pos:14656` · issuer key `iss:1552` COM	TRIM	+$1.7M	−224,095	$106M	$108M	1,335,075	1,110,980
position key `pos:15725` · issuer key `iss:172` COM	ADD	+$1.7M	+115,000	$99.6M	$101M	1,500,476	1,615,476
position key `pos:14234` · issuer key `iss:1897` COMMON STOCK	NEW	+$95.1M	+1,505,374	$0	$95.1M	—	1,505,374
position key `pos:12517` · issuer key `iss:1997` COM	ADD	+$40.2M	+505,803	$36.4M	$76.7M	812,761	1,318,564
position key `pos:13935` · issuer key `iss:1355` COM	ADD	−$11.6M	+1,456,249	$82.5M	$70.9M	3,300,700	4,756,949
position key `pos:14981` · issuer key `iss:535` COM	ADD	−$1.0M	+396,000	$70.2M	$69.1M	1,507,636	1,903,636
position key `sid:sec:prov:3de8946eed46444b94fd5342eaddeac0` · issuer key `cusip6:528872` COM NEW	ADD	+$24.4M	+5,384,615	$44.8M	$69.1M	38,918,903	44,303,518
position key `pos:17421` · issuer key `iss:475` COM	ADD	+$7.9M	+80,000	$57.9M	$65.8M	1,629,279	1,709,279
position key `sid:sec:prov:3fee4169345e05a49cf14bcc2babfc71` · issuer key `cusip6:86150R` COM	TRIM	−$6.4M	−252,000	$71.3M	$65.0M	2,247,347	1,995,347
position key `sid:sec:prov:862b191ccb923fc424f39385b48ce4f8` · issuer key `cusip6:86366E` SPONSORED ADS	ADD	−$11.0M	+250,000	$75.0M	$64.0M	1,078,698	1,328,698
position key `pos:16702` · issuer key `iss:1556` COM	ADD	+$9.6M	+225,536	$53.5M	$63.1M	499,975	725,511
position key `pos:17964` · issuer key `cusip6:152309` SPONSORED ADS	TRIM	−$58.9M	−2,974,053	$101M	$41.8M	4,027,517	1,053,464
position key `pos:12465` · issuer key `iss:548` COM NEW	NEW	+$40.5M	+613,952	$0	$40.5M	—	613,952
position key `pos:13703` · issuer key `iss:619` COM	TRIM	−$28.1M	−1,273,816	$68.5M	$40.4M	3,502,941	2,229,125
position key `pos:13793` · issuer key `iss:1763` COM SHS	TRIM	−$16.2M	−1,300,000	$55.7M	$39.5M	10,129,913	8,829,913
position key `pos:10700` · issuer key `iss:1374` COM	ADD	+$29.7M	+1,990,617	$8.2M	$38.0M	1,007,575	2,998,192
position key `sid:sec:prov:c58e51841f60c26aab31f70d6e4eabc3` · issuer key `cusip6:29286M` COM	ADD	+$5.6M	+1,916,895	$30.1M	$35.8M	3,336,264	5,253,159
position key `sid:sec:prov:306a1219dc3e80453ba2cb392e4281b0` · issuer key `cusip6:697947` COM	ADD	+$24.2M	+182,485	$7.9M	$32.1M	75,000	257,485
position key `sid:sec:prov:bf437640b37b30ed62d091e5e9de5808` · issuer key `cusip6:29337E` COM	NEW	+$29.3M	+746,226	$0	$29.3M	—	746,226
position key `pos:12323` · issuer key `iss:1544` COM	TRIM	+$1.9M	−75,000	$22.3M	$24.2M	1,618,271	1,543,271
position key `pos:16214` · issuer key `iss:797` COM NEW	NEW	+$23.3M	+900,000	$0	$23.3M	—	900,000
position key `sid:sec:prov:37f8d7b8f8c97e91dcf78ef12d0dd5a9` · issuer key `cusip6:G9TY5A` CLASS A ORD SHS	ADD	+$15.4M	+2,434,866	$6.8M	$22.2M	1,300,000	3,734,866
position key `sid:sec:prov:45f58e3bf467aafd3516eb30bc85b601` · issuer key `cusip6:03589W` COM	NEW	+$21.9M	+3,958,646	$0	$21.9M	—	3,958,646
position key `pos:17822` · issuer key `iss:1820` COM	TRIM	−$7.3M	−500,000	$28.6M	$21.3M	2,286,867	1,786,867
position key `sid:sec:prov:9fd554b76cc510ac236cd887d1f06195` · issuer key `cusip6:75383L` COM	TRIM	−$1.4M	−67,000	$21.5M	$20.1M	708,469	641,469
position key `pos:15142` · issuer key `iss:89` CAP STK CL A	ADD	+$12.4M	+45,000	$6.5M	$18.9M	20,703	65,703
position key `sid:sec:prov:b66dc0816f9158ee3c706ae6f74ba1a4` · issuer key `cusip6:359616` COM	ADD	−$4.0M	+400,000	$22.1M	$18.0M	1,950,000	2,350,000
position key `pos:16675` · issuer key `iss:563` COM SHS	NEW	+$17.4M	+919,493	$0	$17.4M	—	919,493
position key `sid:sec:prov:6456a8a739b1b376bb8de72f440b1279` · issuer key `cusip6:03237H` COM	NEW	+$17.1M	+1,230,000	$0	$17.1M	—	1,230,000
position key `sid:sec:prov:87e5cb91aeaa35f0c2f2443d9f9aa785` · issuer key `cusip6:640979` COM	ADD	+$5.3M	+2,209,039	$11.3M	$16.6M	6,288,783	8,497,822
position key `pos:11075` · issuer key `iss:2299` SHS	NEW	+$16.4M	+1,000,000	$0	$16.4M	—	1,000,000
position key `sid:sec:prov:16b2967c1b0bb76b6346bfde109e0bb6` · issuer key `cusip6:23284F` COM	NEW	+$16.3M	+3,457,711	$0	$16.3M	—	3,457,711
position key `pos:15642` · issuer key `iss:1334` COM	ADD	+$8.5M	+51,600	$7.0M	$15.5M	37,485	89,085
position key `pos:11825` · issuer key `iss:1225` COM	ADD	+$8.1M	+26,380	$7.3M	$15.3M	15,000	41,380
position key `sid:sec:prov:8416c67ffd3651f6a5f8d9788c0f2e31` · issuer key `cusip6:61023L` COM NEW	ADD	+$937K	+57,820	$13.9M	$14.8M	212,298	270,118
position key `pos:17467` · issuer key `iss:1751` SPONSORED ADS	ADD	+$5.8M	+14,500	$8.4M	$14.3M	27,700	42,200
position key `pos:11841` · issuer key `iss:2300` SHS CLASS A	ADD	+$5.4M	+37,396	$6.4M	$11.8M	76,218	113,614
position key `sid:sec:prov:cb2ee571f458a0a64c1c152656def847` · issuer key `cusip6:76200L` COM NEW	NEW	+$10.2M	+3,328,287	$0	$10.2M	—	3,328,287
position key `pos:14175` · issuer key `iss:95` COM	TRIM	−$2.2M	−4,859	$11.9M	$9.7M	51,500	46,641
position key `sid:sec:prov:4a591541501e3e997ba3c8d31dd91fde` · issuer key `cusip6:370920` COM SHS	NEW	+$9.2M	+736,104	$0	$9.2M	—	736,104
position key `pos:13683` · issuer key `iss:1648` COM	ADD	+$3.6M	+51,460	$5.5M	$9.1M	35,630	87,090
position key `pos:14712` · issuer key `iss:537` CL A	ADD	+$1.3M	+6,570	$7.7M	$9.0M	16,500	23,070
position key `pos:14305` · issuer key `iss:1452` SPONSORED ADS	ADD	+$1.3M	+20,000	$7.2M	$8.5M	63,401	83,401
position key `pos:10357` · issuer key `iss:1786` COM	ADD	+$7.3M	+20,000	$675K	$8.0M	1,500	21,500
position key `pos:16739` · issuer key `iss:260` SPONSORED ADS	TRIM	−$7.0M	−451,870	$14.3M	$7.2M	2,012,752	1,560,882
position key `pos:16528` · issuer key `iss:559` CL A COM	ADD	+$1.5M	+17,875	$5.0M	$6.4M	36,425	54,300
position key `pos:12290` · issuer key `iss:2277` ORD SHS	ADD	+$198K	+35,200	$5.8M	$6.0M	93,616	128,816
position key `pos:16156` · issuer key `iss:617` COM NEW	ADD	+$553K	+34,771	$5.0M	$5.5M	115,229	150,000
position key `sid:sec:prov:04db8e230f7d6fd2ef9baff81e023a68` · issuer key `cusip6:98139A` COM CL A	ADD	−$1.3M	+13,377	$6.8M	$5.5M	79,123	92,500
position key `sid:sec:prov:f3f8f36b088f3feb965b6e5cad32a6e3` · issuer key `cusip6:00091E` COM	NEW	+$5.4M	+1,800,000	$0	$5.4M	—	1,800,000
position key `sid:sec:prov:c560957b5581c9f7aa7d0a8046845dcb` · issuer key `cusip6:80401L` COM	NEW	+$5.0M	+892,074	$0	$5.0M	—	892,074
position key `pos:12827` · issuer key `iss:323` COM	ADD	+$2.2M	+8,000	$2.4M	$4.6M	7,000	15,000
position key `sid:sec:prov:fb9ea7ee3bb27d4ceeeb748915397758` · issuer key `cusip6:00860C` SPONSORED ADS	NEW	+$4.3M	+411,250	$0	$4.3M	—	411,250
position key `sid:sec:prov:86621fbc3e124677946412054c6ab829` · issuer key `cusip6:M2197Q` ORDINARY SHARES	ADD	+$1.6M	+161,544	$2.7M	$4.3M	150,000	311,544
position key `sid:sec:prov:decc631ca767fff8810ea64bf0108cb4` · issuer key `cusip6:81578P` COM CL A	TRIM	−$3.2M	−1,541,327	$7.3M	$4.1M	4,000,000	2,458,673
position key `pos:16477` · issuer key `iss:760` COM SHS CL A	NEW	+$2.9M	+100,000	$0	$2.9M	—	100,000
position key `sid:sec:prov:431d99b61e91bc00d72171223c54fba0` · issuer key `cusip6:37637K` CLASS A COM	ADD	−$1.6M	+1,000	$3.7M	$2.2M	99,000	100,000
position key `pos:15221` · issuer key `iss:1228` COM	NEW	+$2.0M	+6,000	$0	$2.0M	—	6,000
position key `sid:sec:prov:329f9ca8856a4994587a14e5811018e8` · issuer key `cusip6:M7S64H` SHS	ADD	−$781K	+8,000	$2.5M	$1.7M	17,000	25,000
position key `pos:14816` · issuer key `iss:2028` COM SHS	NEW	+$1.6M	+50,000	$0	$1.6M	—	50,000
position key `sid:sec:prov:de1e3b0f18c7c31000f29081a3c41234` · issuer key `cusip6:482497` SPONSORED ADS	TRIM	−$788K	−45,000	$2.3M	$1.5M	145,000	100,000
position key `pos:15546` · issuer key `cusip6:00835Q` COM NEW	NEW	+$1.4M	+110,000	$0	$1.4M	—	110,000
position key `pos:15409` · issuer key `iss:1212` COM CL A	TRIM	−$2.0M	−50,000	$3.2M	$1.1M	75,000	25,000
position key `pos:12312` · issuer key `iss:735` CLASS A COM STK	ADD	+$123K	+25,000	$934K	$1.1M	25,000	50,000
position key `pos:12709` · issuer key `iss:1480` CLASS A COM SHS	TRIM	−$285K	−25,000	$1.2M	$942K	75,000	50,000
position key `pos:15764` · issuer key `iss:2177` ORD SHS CL A	NEW	+$359K	+25,000	$0	$359K	—	25,000
pos:10449	EXIT‡e	−$2.7M	−12,000	$2.7M	$0	12,000	—
pos:10513	EXIT‡e	−$2.4M	−21,500	$2.4M	$0	21,500	—
pos:11390	EXIT‡e	−$4.7M	−7,169	$4.7M	$0	7,169	—
pos:12386	EXIT‡e	−$10.4M	−775,000	$10.4M	$0	775,000	—
pos:12568	EXIT‡e	−$2.5M	−1,046,517	$2.5M	$0	1,046,517	—
pos:12725	EXIT‡e	−$6.9M	−26,100	$6.9M	$0	26,100	—
pos:13865	EXIT‡e	−$2.0M	−27,500	$2.0M	$0	27,500	—
pos:14782	EXIT‡e	−$2.1M	−11,450	$2.1M	$0	11,450	—
pos:14877	EXIT‡e	−$4.6M	−700,000	$4.6M	$0	700,000	—
pos:15965	EXIT‡e	−$50.3M	−235,862	$50.3M	$0	235,862	—
pos:16159	EXIT‡e	−$4.9M	−500,000	$4.9M	$0	500,000	—
pos:17290	EXIT‡e	−$4.2M	−12,051	$4.2M	$0	12,051	—
pos:17533	EXIT‡e	−$2.4M	−14,000	$2.4M	$0	14,000	—
pos:18210	EXIT‡e	−$6.9M	−83,833	$6.9M	$0	83,833	—
sid:sec:prov:0983c227d7f489fadce1abda0a417532	EXIT‡e	−$46.6M	−1,375,000	$46.6M	$0	1,375,000	—
sid:sec:prov:19b9675407eb505d5af586b26c66f53a	EXIT‡e	−$6.0M	−1,500,000	$6.0M	$0	1,500,000	—
sid:sec:prov:1e348df3cde91ba41d5ebeef0c53e107	EXIT‡e	−$16.0M	−588,450	$16.0M	$0	588,450	—
sid:sec:prov:233302be8852a126d4f3dc726082a4c4	EXIT‡e	−$64.8M	−2,578,396	$64.8M	$0	2,578,396	—
sid:sec:prov:2bc6a25d40cf07124e3a03bdecf4a4df	EXIT‡e	−$6.0M	−1,000,000	$6.0M	$0	1,000,000	—
sid:sec:prov:3044f98940a2897deb445091c04637d0	EXIT‡e	−$10.7M	−800,000	$10.7M	$0	800,000	—
sid:sec:prov:5e2abdcbdb056fb4d049308ad37d5f46	EXIT‡e	−$4.3M	−724,771	$4.3M	$0	724,771	—
sid:sec:prov:75fda3ed23c32f13e4e79ddd14f8d627	EXIT‡e	−$3.4M	−62,000	$3.4M	$0	62,000	—
sid:sec:prov:82e63d4ea25eec81be9e092c63a97283	EXIT‡e	−$168K	−105,347	$168K	$0	105,347	—
sid:sec:prov:8451bca5642cd3382c05a2c067b2be4e	EXIT‡e	−$147K	−115,603	$147K	$0	115,603	—
sid:sec:prov:88f799da4526ad1ae0a440740a6e9c1b	EXIT‡e	−$6.9M	−1,000,000	$6.9M	$0	1,000,000	—
sid:sec:prov:900b6c288410f358bba42974626cb202	EXIT‡e	−$2.2M	−203,933	$2.2M	$0	203,933	—
sid:sec:prov:b8667259508845b4ec41b6089d900b40	EXIT‡e	−$1.1M	−201,419	$1.1M	$0	201,419	—
sid:sec:prov:bd4b862f6cf27f7bbb6f4d26443faaca	EXIT‡e	−$7.2M	−720,622	$7.2M	$0	720,622	—

Flags: no row carries a flag.

1–20 of the 100 changes on this page

Mark-to-market only (no share change) · 28

Positions whose share count is identical in both quarters; the value changed with price, not with a decision.

Positions held with no share change into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match `identity_reconciled_by_cusip`	the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE `classified_by_value` · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake	derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero	Prev value	Curr value	Prev shares	Curr shares
position key `pos:17712` · issuer key `iss:1630` COM	NO CHANGE	+$55.3M	$477M	$532M	10,825,013	10,825,013
position key `sid:sec:prov:3c51cfeec4a5be695bdb08ebfaa41e00` · issuer key `cusip6:03969F` COM	NO CHANGE	−$6.7M	$71.7M	$65.0M	3,007,077	3,007,077
position key `pos:12161` · issuer key `iss:587` COM	NO CHANGE	−$15.3M	$78.5M	$63.2M	988,401	988,401
position key `pos:11739` · issuer key `iss:1687` COM NEW	NO CHANGE	+$12.0M	$43.4M	$55.4M	7,690,405	7,690,405
position key `sid:sec:prov:c07b19289bd1953ef889bf232426771d` · issuer key `cusip6:81734D` COM	NO CHANGE	−$7.7M	$55.8M	$48.1M	2,000,000	2,000,000
position key `pos:13625` · issuer key `iss:45` COM NEW	NO CHANGE	+$14.5M	$26.8M	$41.3M	818,598	818,598
position key `sid:sec:prov:097fe4205cdb81b5acf642533490216f` · issuer key `cusip6:23306J` SPONSORED ADS	NO CHANGE	+$3.2M	$35.6M	$38.8M	1,857,362	1,857,362
position key `pos:10692` · issuer key `iss:2279` ORD SHS	NO CHANGE	−$15.1M	$46.0M	$30.9M	9,969,495	9,969,495
position key `sid:sec:prov:8948595df4e56c28a2e8dffed59ee810` · issuer key `cusip6:24823R` COM	NO CHANGE	+$3.8M	$23.1M	$26.8M	1,396,513	1,396,513
position key `pos:14281` · issuer key `iss:2313` SHS	NO CHANGE	−$23.9M	$41.7M	$17.8M	2,450,000	2,450,000
position key `pos:12625` · issuer key `iss:544` COM	NO CHANGE	+$4.6M	$12.4M	$17.0M	1,193,410	1,193,410
position key `sid:sec:prov:5c7f5b7b9166fb5eb65582ad9f6aefb9` · issuer key `cusip6:82686Q` ADS	NO CHANGE	−$2.4M	$17.7M	$15.3M	2,911,438	2,911,438
position key `pos:10212` · issuer key `iss:1665` COM	NO CHANGE	−$315K	$12.3M	$12.0M	300,000	300,000
position key `sid:sec:prov:8cb65945c1d745d32abfa3ce25a4d2e9` · issuer key `cusip6:45719W` COM NEW	NO CHANGE	−$2.2M	$12.0M	$9.8M	5,850,000	5,850,000
position key `sid:sec:prov:25db868bd92949401541405f5298734d` · issuer key `cusip6:56565P` COM	NO CHANGE	+$1.2M	$7.9M	$9.1M	450,000	450,000
position key `sid:sec:prov:35327bac9fdc9ba8e57fb291c13e050b` · issuer key `cusip6:44975P` SPONSORED ADS	NO CHANGE	−$4.6M	$11.9M	$7.4M	3,000,000	3,000,000
position key `pos:10682` · issuer key `cusip6:00032Q` COM	NO CHANGE	+$2.1M	$5.0M	$7.2M	2,082,000	2,082,000
position key `sid:sec:prov:9e958f4e10d0d474cc9e75d42ea33a9a` · issuer key `cusip6:88032L` COM NEW	NO CHANGE	+$1.6M	$5.2M	$6.8M	427,141	427,141
position key `sid:sec:prov:d870181e4209250aa4f0822ee5192029` · issuer key `cusip6:918385` CL A NEW	NO CHANGE	−$53.8K	$6.5M	$6.5M	163,000	163,000
position key `sid:sec:prov:de0907d604dc0fc94b1a3f8dd009ab9f` · issuer key `cusip6:00534A` COM	NO CHANGE	−$4.7M	$9.9M	$5.2M	4,000,000	4,000,000
position key `pos:10533` · issuer key `iss:1004` COM	NO CHANGE	−$2.7M	$7.6M	$4.9M	170,000	170,000
position key `sid:sec:prov:32df3091b0447927d2680841e51efc1f` · issuer key `cusip6:500946` COM	NO CHANGE	+$1.2M	$2.8M	$3.9M	347,718	347,718
position key `sid:sec:prov:94240aadfa3d78ad689ccae76767f0be` · issuer key `cusip6:00847G` COM NEW	NO CHANGE	+$213K	$3.3M	$3.6M	1,064,250	1,064,250
position key `sid:sec:prov:d7ce1f7304a65bd9fa8becb1437c7f71` · issuer key `cusip6:344174` COM	NO CHANGE	−$447K	$3.9M	$3.4M	720,720	720,720
position key `pos:11729` · issuer key `cusip6:482929` COM	NO CHANGE	−$1.2M	$3.7M	$2.5M	435,798	435,798
position key `sid:sec:prov:cc23b1894e5c241f95346c4deeb13983` · issuer key `cusip6:38341P` COM	NO CHANGE	−$14.4M	$16.1M	$1.7M	5,208,968	5,208,968
position key `pos:17880` · issuer key `iss:2302` ORDINARY SHARES	NO CHANGE	−$150K	$1.6M	$1.5M	43,100	43,100
position key `sid:sec:prov:1266daf28de201038d46cc25c3965279` · issuer key `cusip6:753018` COM CL A	NO CHANGE	−$1.2M	$2.7M	$1.5M	2,000,000	2,000,000

Flags: no row carries a flag.

Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Truncated by Public Filings. Changes compare every position with a security identifier, new and exited included; holdings without one are counted, not compared. methodology §13F ↗

Reported positions — 2026-03-31

1–100 of 100 issuers · $3.6B disclosed value over 102 rows · 0 undisclosed-value rows

View

This build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.

This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.

a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing

Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.

value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0

—

Scholar Rock Holding Corp · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$532M

10,825,013

14.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Kymera Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$265M

3,186,830

7.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Erasca Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$182M

11,244,246

5.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Edgewise Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$140M

4,430,263

3.9%

—

BeOne Medicines AG · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$138M

465,000

3.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Tango Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$118M

5,657,105

3.3%

—

Bicara Therapeutics Inc · COM CUSIP 055477103
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$115M

5,802,970

3.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Revolution Medicines Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$108M

1,110,980

3.0%

—

Arrowhead Pharmaceuticals Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$101M

1,615,476

2.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Veradermics Inc · COMMON STOCK CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$95.1M

1,505,374

2.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Xenon Pharmaceuticals Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$76.7M

1,318,564

2.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Olema Pharmaceuticals Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$70.9M

4,756,949

2.0%

—

Crinetics Pharmaceuticals Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$69.1M

1,903,636

1.9%

—

Lexicon Pharmaceuticals Inc · COM NEW CUSIP 528872302
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$69.1M

44,303,518

1.9%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Cogent Biosciences Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$65.8M

1,709,279

1.8%

—

Stoke Therapeutics Inc · COM CUSIP 86150R107
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$65.0M

1,995,347

1.8%

—

Arcus Biosciences Inc

1 position · 2 reported rows

Rows Siren, L.L.C. reported for Arcus Biosciences Inc, as it reported them
Arcus Biosciences Inc · COM CUSIP 03969F109 src ↗	$34.8M	1,612,077
Arcus Biosciences Inc · COM CUSIP 03969F109 src ↗	$30.1M	1,395,000

ticker not yet mapped

$65.0M

3,007,077

1.8%

—

Structure Therapeutics Inc · SPONSORED ADS CUSIP 86366E106
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$64.0M

1,328,698

1.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Disc Medicine Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$63.2M

988,401

1.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Rhythm Pharmaceuticals Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$63.1M

725,511

1.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Solid Biosciences Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$55.4M

7,690,405

1.5%

—

Septerna Inc · COM CUSIP 81734D104
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$48.1M

2,000,000

1.3%

—

Centessa Pharmaceuticals PLC · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$41.8M

1,053,464

1.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Spyre Therapeutics Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$41.3M

818,598

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Cytokinetics Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$40.5M

613,952

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Dyne Therapeutics, Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$40.4M

2,229,125

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Taysha Gene Therapies Inc · COM SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$39.5M

8,829,913

1.1%

—

Dbv Technologies SA · SPONSORED ADS CUSIP 23306J309
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$38.8M

1,857,362

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Oric Pharmaceuticals Inc

1 position · 2 reported rows

Rows Siren, L.L.C. reported for Oric Pharmaceuticals Inc, as it reported them
Oric Pharmaceuticals Inc · COM CUSIP — src ↗	$25.2M	1,990,617
Oric Pharmaceuticals Inc · COM CUSIP — src ↗	$12.8M	1,007,575

$38.0M

2,998,192

1.1%

—

enGene Holdings Inc · COM CUSIP 29286M105
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$35.8M

5,253,159

1.0%

—

Palvella Therapeutics Inc · COM CUSIP 697947109
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$32.1M

257,485

0.9%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Taboola.com Ltd · ORD SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$30.9M

9,969,495

0.9%

—

Enliven Therapeutics Inc · COM CUSIP 29337E102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$29.3M

746,226

0.8%

—

Denali Therapeutics Inc · COM CUSIP 24823R105
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$26.8M

1,396,513

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Remitly Global Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$24.2M

1,543,271

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Damora Therapeutics Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$23.3M

900,000

0.6%

—

Zura Bio Ltd · CLASS A ORD SHS CUSIP G9TY5A101
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$22.2M

3,734,866

0.6%

—

Annexon Inc · COM CUSIP 03589W102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$21.9M

3,958,646

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Trevi Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$21.3M

1,786,867

0.6%

—

Rapport Therapeutics Inc · COM CUSIP 75383L102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$20.1M

641,469

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Alphabet Inc · CAP STK CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$18.9M

65,703

0.5%

—

Fulcrum Therapeutics Inc · COM CUSIP 359616109
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$18.0M

2,350,000

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

WAVE Life Sciences Ltd · SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$17.8M

2,450,000

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Definium Therapeutics Inc · COM SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$17.4M

919,493

0.5%

—

Amylyx Pharmaceuticals Inc · COM CUSIP 03237H101
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$17.1M

1,230,000

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Cullinan Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$17.0M

1,193,410

0.5%

—

Neumora Therapeutics Inc · COM CUSIP 640979100
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$16.6M

8,497,822

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Uniqure NV · SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$16.4M

1,000,000

0.5%

—

CytomX Therapeutics Inc · COM CUSIP 23284F105
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$16.3M

3,457,711

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NVIDIA Corp · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$15.5M

89,085

0.4%

—

Silence Therapeutics PLC · ADS CUSIP 82686Q101
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$15.3M

2,911,438

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Microsoft Corp · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$15.3M

41,380

0.4%

—

Monopar Therapeutics Inc · COM NEW CUSIP 61023L207
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$14.8M

270,118

0.4%

—

Taiwan Semiconductor Manufacturing Co Ltd · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$14.3M

42,200

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Sionna Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$12.0M

300,000

0.3%

—

Nebius Group NV · SHS CLASS A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$11.8M

113,614

0.3%

—

Rezolute Inc · COM NEW CUSIP 76200L309
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$10.2M

3,328,287

0.3%

—

Inhibikase Therapeutics Inc · COM NEW CUSIP 45719W205
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$9.8M

5,850,000

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Amazon.com Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$9.7M

46,641

0.3%

—

Generate Biomedicines Inc · COM SHS CUSIP 370920100
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$9.2M

736,104

0.3%

—

MapLight Therapeutics Inc · COM CUSIP 56565P103
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$9.1M

450,000

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ServiceNow Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$9.1M

87,090

0.3%

—

CrowdStrike Holdings Inc · CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$9.0M

23,070

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PDD Holdings Inc · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$8.5M

83,401

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Tesla Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$8.0M

21,500

0.2%

—

NovaBridge Biosciences · SPONSORED ADS CUSIP 44975P103
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$7.4M

3,000,000

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Bicycle Therapeutics PLC · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$7.2M

1,560,882

0.2%

—

Whitehawk Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$7.2M

2,082,000

0.2%

—

Tenax Therapeutics Inc · COM NEW CUSIP 88032L605
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$6.8M

427,141

0.2%

—

vTv Therapeutics Inc · CL A NEW CUSIP 918385204
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$6.5M

163,000

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Datadog Inc · CL A COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$6.4M

54,300

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Jfrog Ltd · ORD SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$6.0M

128,816

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Dynatrace Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$5.5M

150,000

0.2%

—

Workiva Inc · COM CL A CUSIP 98139A105
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$5.5M

92,500

0.2%

—

Absci Corp · COM CUSIP 00091E109
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$5.4M

1,800,000

0.1%

—

Invivyd Inc · COM CUSIP 00534A102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$5.2M

4,000,000

0.1%

—

Satellos Bioscience Inc · COM CUSIP 80401L803
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$5.0M

892,074

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

IONQ Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$4.9M

170,000

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Broadcom Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$4.6M

15,000

0.1%

—

Agomab Therapeutics NV · SPONSORED ADS CUSIP 00860C102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$4.3M

411,250

0.1%

—

Cellebrite DI Ltd · ORDINARY SHARES CUSIP M2197Q107
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$4.3M

311,544

0.1%

—

Seer Inc · COM CL A CUSIP 81578P106
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$4.1M

2,458,673

0.1%

—

Korro Bio Inc · COM CUSIP 500946108
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$3.9M

347,718

0.1%

—

Agenus Inc · COM NEW CUSIP 00847G804
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$3.6M

1,064,250

0.1%

—

Foghorn Therapeutics Inc · COM CUSIP 344174107
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$3.4M

720,720

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Forgent Power Solutions, Inc · COM SHS CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$2.9M

100,000

0.1%

—

Kalaris Therapeutics Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$2.5M

435,798

0.1%

—

GitLab Inc · CLASS A COM CUSIP 37637K108
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$2.2M

100,000

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Micron Technology Inc · COM CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$2.0M

6,000

0.1%

—

monday.com Ltd · SHS CUSIP M7S64H106
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$1.7M

25,000

0.0%

—

Gossamer Bio Inc · COM CUSIP 38341P102
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$1.7M

5,208,968

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Amer Sports Inc · COM SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.6M

50,000

0.0%

—

KE Holdings Inc · SPONSORED ADS CUSIP 482497104
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$1.5M

100,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

IREN Ltd · ORDINARY SHARES CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.5M

43,100

0.0%

—

Rani Therapeutics Holdings Inc · COM CL A CUSIP 753018100
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$1.5M

2,000,000

0.0%

—

Aeva Technologies Inc · COM NEW CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

ticker not yet mapped

$1.4M

110,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Medline Inc · COM CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.1M

25,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Figma Inc · CLASS A COM STK CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$1.1M

50,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Primo Brands Corp · CLASS A COM SHS CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$942K

50,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

Nu Holdings Ltd. · ORD SHS CL A CUSIP —
2026-03-31 filed 2026-05-14 +44d

src ↗

$359K

25,000

0.0%

1–20 of 100 issuers

Change kind and share change are in Position changes above; Congress overlap is planned.

One line per issuer, largest first; a row with no issuer key stands on its own line. Open a line for its rows as this filer reported them. The list holds every row this filer reported for the quarter. Issuer totals on the holders pages count each manager's own report once; that never removes a row here. how positions are grouped ↗

Book shape

2026-03-31 · concentration · vs tracked median · tick = median

Top-25 concentration: 74.7%below median 80.0%
Concentration index: 429 bpsbelow median 446 bps
Positions with value: 102 / 102median book 97.5 positions

Concentration uses reported 13F long value, not total assets. The index is withheld when any position lacks a value. Medians are over the 8,748 tracked filers with a 2026-03-31 book; the index median over the 8,662 with a complete book.

holdings whose <value> did not parse — retained and counted, never zero-filled: 0 · share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 74.7% · integer Herfindahl–Hirschman index in basis points over disclosed position values: 429 · QoQ moves: 132

Filing history

AVAILABLE QUARTERS

Available filing periods
Period	Source
2026-03-31	EDGAR ↗

PLANNED sector rotation · Congress overlap · signals for this filer

Complete source filings on SEC EDGAR

The complete filing on EDGAR.

The position list above is served from the published Public Filings build, each position as this filer reported it; where the page cannot embed every reported row, the list says how many it leaves out. This block is provenance, not a substitute: the filing itself is the record, and it is one click away. Public Filings decided on 2026-08-01 to serve this list from its published build; filings newer than this build are on EDGAR.

Open Siren, L.L.C.'s 13F filings on SEC EDGAR ↗

Notes on this data

Reported positions

Quarter-end holdings as filed

Explore the full published position list and its source filing. This record excludes the manager’s cash, shorts and non-13(f) assets.

Share changes

Compare consecutive quarters

Position changes retain the producer’s classification and comparability flags. Share counts and reported values describe different changes.

Coverage

A snapshot, not current holdings

Use the quarter selector to inspect available periods. Unknown values stay unknown and each table states its coverage.

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.

Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).