Form 13-F position report

BIOATLA INC

Reported by SIMPLEX TRADING LLC

Company profile Manager portfolio Source filing
BCAB CUSIP 09077B104 Manager CIK 0001488542
Latest reported change

Reported 1,858 shares, down 8,966 (82.8%) from the prior quarter.

Reported value -95.5%; share count -82.8% vs. the prior quarter.

Reduced
% of reported 13F value < 0.01% This manager · Q1 2023
Shares 1,858 Quarter-end amount reported
Reported value $4,000 Fair value at quarter end
Consecutive quarters held 6 Through Q1 2023

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

19 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Reduced 0 -73,901 (-100.0%) 0 $0 2026-08-12
Q1 2026 Reduced 73,901 -46,490 (-38.6%) < 0.01% $11,898 2026-05-14
Q4 2025 Added 120,391 +84,235 (233.0%) < 0.01% $68,382 2026-02-11
Q3 2025 Added 36,156 +22,858 (171.9%) < 0.01% $24,000 2025-11-12
Q2 2025 Added 13,298 +3,835 (40.5%) < 0.01% $5,000 2025-08-05
Q1 2025 New 9,463 +9,463 (0.0%) < 0.01% $3,000 2025-05-12
Q4 2024 Reduced 0 -28,490 (-100.0%) 0 $0 2025-02-11
Q3 2024 New 28,490 +28,490 (0.0%) < 0.01% $50,000 2024-11-08
Q2 2024 Reduced 0 -43,239 (-100.0%) 0 $0 2024-07-25
Q1 2024 Added 43,239 +31,313 (262.6%) < 0.01% $148,000 2024-04-25
Q4 2023 Reduced 11,926 -25,575 (-68.2%) < 0.01% $29,000 2024-02-02
Q3 2023 New 37,501 +37,501 (0.0%) < 0.01% $63,000 2023-11-01
Q2 2023 Reduced 0 -1,858 (-100.0%) 0 $0 2023-08-04
Q1 2023 Reduced 1,858 -8,966 (-82.8%) < 0.01% $4,000 2023-04-27
Q4 2022 Added 10,824 +8,565 (379.2%) < 0.01% $89,000 2023-02-02
Q3 2022 Reduced 2,259 -21,212 (-90.4%) < 0.01% $17,000 2022-11-04
Q2 2022 Added 23,471 +12,215 (108.5%) < 0.01% $66,000 2022-08-03
Q1 2022 Added 11,256 +2,703 (31.6%) < 0.01% $56,000 2022-05-02
Q4 2021 New 8,553 +8,553 (0.0%) < 0.01% $167,000 2022-02-04
Institutional context

Who else reported the position

106 managers reported BIOATLA INC for Q1 2023.

Manager Activity Shares Change % of reported 13F Reported value Tenure
Soleus Capital Management L P Added 4,321,197 +100,800 1.2% $11,580,808 10 qtrs
ORBIMED ADVISORS LLC Added 3,861,000 +3,528,628 0.21% $10,347,480 2 qtrs
TANG CAPITAL MANAGEMENT LLC Added 3,624,076 +500,000 1.45% $9,712,524 6 qtrs
VANGUARD GROUP INC Reduced 1,923,375 -7,664 < 0.01% $5,154,645 10 qtrs
MORGAN STANLEY Added 1,878,521 +57,157 < 0.01% $5,034,436 10 qtrs
ADAGE CAPITAL PARTNERS GP L L C Reduced 1,594,942 -155,058 < 0.01% $4,274,445 2 qtrs
Candriam S C A Reduced 1,565,406 -240,000 0.03% $3,861,480 8 qtrs
WASATCH ADVISORS INC Added 1,268,169 +689,193 0.02% $3,398,693 2 qtrs
Cormorant Asset Management LP Reduced 1,181,115 -2,499,250 0.21% $3,165,000 10 qtrs
BlackRock Inc Reduced 983,512 -31,691 < 0.01% $2,635,813 10 qtrs
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Filing details and methodology As reported
Report period
March 31, 2023
Filed
April 27, 2023
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
1,858
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.