<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Thu Oct 01 21:32:48 UTC 2026 -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="trin_RisksRelatedToTheNotesMember_lbl" xml:lang="en-US">Risks Related to the Notes [Member]</label>
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    <loc xlink:type="locator" xlink:label="trin_CommonStocksMember" xlink:href="trin-20260930.xsd#trin_CommonStocksMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="trin_CommonStocksMember_lbl" xml:lang="en-US">Common Stock [Member]</label>
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    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US">Preferred Stock [Member]</label>
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