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Institutional Ownership · SEC Form 13F

Who owns Trailblazer Acquisition Corp. (BLZR)


Which tracked institutional funds hold BLZR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BLZR company fundamentals →

Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.

133
Institutional holders
32M
Shares held (tracked funds)

How the tape is positioned

16 tracked funds added or opened BLZR while 19 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.

A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.

Conviction spread

BLZR’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 1.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in BLZR divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.

Institutional & insider positioning

Between 2025-Q4 and 2026-Q1, across 78 tracked filers holding BLZR, 31 increased or opened the position and 25 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.

This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.

New buyers & exits

Funds opening or closing a position in BLZR between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.

New buyers 2

  • O'Connor Alternative Investments LLC$4M
  • BlueCrest Capital Management Ltd$2M

Full exits 3

  • STEADFAST CAPITAL MANAGEMENT LP$7M
  • OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)$4M
  • MIZUHO SECURITIES USA LLC$1M

Largest adds

  • D. E. Shaw & Co., Inc.$9M
  • Parallax Volatility Advisers, L.P.$6M
  • GLAZER CAPITAL, LLC$4M
  • Centiva Capital, LP$3M
  • ARISTEIA CAPITAL, L.L.C.$3M
  • WOLVERINE ASSET MANAGEMENT LLC$3M

Largest trims

  • METEORA CAPITAL, LLC$90M
  • Harraden Circle Investments, LLC$33M
  • TENOR CAPITAL MANAGEMENT Co., L.P.$28M
  • HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$10M
  • Context Capital Management, LLC$4M
  • Ilex Capital Partners (UK) LLP$4M

Institutional holders

One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).

FundSharesReported value% of valueQuarter
METEORA CAPITAL, LLC trimmed513,237$204M31.0%2026-Q1
Harraden Circle Investments, LLC trimmed400,869$159M24.2%2026-Q1
TENOR CAPITAL MANAGEMENT Co., L.P. trimmed333,333$132M20.2%2026-Q1
Context Capital Management, LLC trimmed50,000$20M3.0%2026-Q1
LMR Partners LLP1,000,000$10M1.5%2026-Q1
MMCAP International Inc. SPC1,000,000$10M1.5%2026-Q1
Polar Asset Management Partners Inc.1,000,000$10M1.5%2026-Q1
TWO SIGMA INVESTMENTS, LP869,999$9M1.3%2026-Q1
JPMORGAN CHASE & CO trimmed849,641$9M1.3%2026-Q1
Saba Capital Management, L.P. trimmed536,158$5M0.8%2026-Q1
ARISTEIA CAPITAL, L.L.C. added500,000$5M0.8%2026-Q1
Alberta Investment Management Corp500,000$5M0.8%2026-Q1
Linden Advisors LP added500,000$5M0.8%2026-Q1
HGC Investment Management Inc. trimmed400,000$4M0.6%2026-Q1
Ghisallo Capital Management LLC400,000$4M0.6%2026-Q1
O'Connor Alternative Investments LLC new400,000$4M0.6%2026-Q1
Periscope Capital Inc. added351,900$4M0.5%2026-Q1
Lineage Point Capital LP trimmed332,348$3M0.5%2026-Q1
TORONTO DOMINION BANK added326,897$3M0.5%2026-Q1
Centiva Capital, LP added324,999$3M0.5%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added299,498$3M0.5%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC added298,861$3M0.5%2026-Q1
SONA ASSET MANAGEMENT (US) LLC added293,300$3M0.4%2026-Q1
OMERS ADMINISTRATION Corp added272,899$3M0.4%2026-Q1
BERKLEY W R CORP261,006$3M0.4%2026-Q1
BlueCrest Capital Management Ltd new200,000$2M0.3%2026-Q1
MILLENNIUM MANAGEMENT LLC trimmed200,000$2M0.3%2026-Q1
First Trust Capital Management L.P.199,998$2M0.3%2026-Q1
Governors Lane LP added150,000$2M0.2%2026-Q1
HEIGHTS CAPITAL MANAGEMENT, INC113,373$1M0.2%2026-Q1
CSS LLC/IL added100,000$1M0.2%2026-Q1
Davidson Kempner Capital Management LP100,000$1M0.2%2026-Q1
Virtu Financial LLC added95,448$959K0.1%2026-Q1
READYSTATE ASSET MANAGEMENT LP79,344$806K0.1%2026-Q1
HRT FINANCIAL LP added50,000$508K0.1%2026-Q1
TIG Advisors, LLC50,000$502K0.1%2026-Q1
Schonfeld Strategic Advisors LLC trimmed50,000$502K0.1%2026-Q1
Kryger Capital LLC new25,780$259K0.0%2026-Q1
L1 Global Manager Pty Ltd25,000$251K0.0%2026-Q1
Mint Tower Capital Management B.V. added25,000$251K0.0%2026-Q1
ABC ARBITRAGE SA20,000$201K0.0%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed14,609$148K0.0%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC new14,428$145K0.0%2026-Q1
GABELLI & Co INVESTMENT ADVISERS, INC.13,400$136K0.0%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed333,333$132K0.0%2026-Q1
Magnetar Financial LLC trimmed333,329$132K0.0%2026-Q1
Shaolin Capital Management LLC trimmed325,698$129K0.0%2026-Q1
GABELLI FUNDS LLC11,600$118K0.0%2026-Q1
CITADEL ADVISORS LLC added10,916$110K0.0%2026-Q1
Calamos Advisors LLC10,000$102K0.0%2026-Q1
Bulldog Investors, LLP10,000$102K0.0%2026-Q1
STATE OF WISCONSIN INVESTMENT BOARD10,000$100K0.0%2026-Q1
AQR Arbitrage LLC added246,194$89K0.0%2026-Q1
ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed192,883$77K0.0%2026-Q1
Radcliffe Capital Management, L.P.178,346$68K0.0%2026-Q1
Clear Street Group Inc. added170,618$68K0.0%2026-Q1
PICTON MAHONEY ASSET MANAGEMENT trimmed166,665$66K0.0%2026-Q1
Wealthspring Capital LLC trimmed158,186$63K0.0%2026-Q1
MOORE CAPITAL MANAGEMENT, LP133,334$53K0.0%2026-Q1
RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed133,332$53K0.0%2026-Q1
FNY Investment Advisers, LLC added4,800$48K0.0%2026-Q1
Weiss Asset Management LP98,860$39K0.0%2026-Q1
Ilex Capital Partners (UK) LLP95,956$38K0.0%2026-Q1
Parallax Volatility Advisers, L.P. added94,628$34K0.0%2026-Q1
Hudson Bay Capital Management LP trimmed84,172$33K0.0%2026-Q1
D. E. Shaw & Co., Inc. trimmed66,666$26K0.0%2026-Q1
Jain Global LLC66,666$26K0.0%2026-Q1
GLAZER CAPITAL, LLC trimmed41,193$16K0.0%2026-Q1
WHITEBOX ADVISORS LLC trimmed33,333$13K0.0%2026-Q1
GRITSTONE ASSET MANAGEMENT LLC trimmed33,333$13K0.0%2026-Q1
DLD Asset Management, LP22,221$9K0.0%2026-Q1
Verition Fund Management LLC trimmed16,685$7K0.0%2026-Q1
Kepos Capital LP new15,700$6K0.0%2026-Q1
MORGAN STANLEY500$5K0.0%2026-Q1
PenderFund Capital Management Ltd. trimmed3,333$1K0.0%2026-Q1
Coston, McIsaac & Partners193$1K0.0%2026-Q1
UBS Group AG400$1590.0%2026-Q1
ROYAL BANK OF CANADA trimmed1,0000.0%2026-Q1
STEADFAST CAPITAL MANAGEMENT LP700,000$7M1.1%2025-Q4 stale
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new400,000$4M0.6%2025-Q4 stale
MIZUHO SECURITIES USA LLC added143,152$1M0.2%2025-Q4 stale
FIFTH LANE CAPITAL, LP new100,000$1M0.2%2025-Q3 stale
Quarry LP new75,565$773K0.1%2025-Q3 stale
Sculptor Capital LP new50,000$511K0.1%2025-Q3 stale
Tuttle Capital Management, LLC new45,000$460K0.1%2025-Q3 stale
KRYGER CAPITAL Ltd added25,437$261K0.0%2025-Q4 stale
HIGHBRIDGE CAPITAL MANAGEMENT LLC new25,000$256K0.0%2025-Q3 stale
SYQUANT CAPITAL SAS25,000$256K0.0%2025-Q4 stale
Fort Baker Capital Management LP25,000$250K0.0%2025-Q4 stale
DELTEC ASSET MANAGEMENT LLC new10,000$102K0.0%2025-Q3 stale

Ownership over time

Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.

HoldersTotal shares

Reading this table

Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.

About 13F filings

A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.

Learn how to read institutional ownership