Mesirow Financial Investment Management, Inc. — 13F Holdings & Portfolio
CIK 1469475 · latest 13F-HR filed 2026-04-21
Mesirow Financial Investment Management, Inc. manages $6.18B in 13F-reported U.S. long-equity assets across 517 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are BRK.B (7.58%), MOAT (4.19%), AAPL (4.01%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 54 new positions, exited 22, added to 292, and trimmed 89.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$6.18B
Long-equity book
517
Distinct positions
2026-03-31
Filed 2026-04-21
+54 / −22 / ↑292 / ↓89
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- ISHARES TR$100.6M +259.4%
- INVESTMENT MANAGERS SER TR I$97.8M +161.8%
- ISHARES TR$80.1M +272.3%
- ISHARES TR$64.1M +49.0%
- BERKSHIRE HATHAWAY INC DEL$59.7M +14.6%
Top Trims
- PROFESIONALLY MANAGED PORTFO-$89.7M -68.0%
- APPLE INC-$24.4M -9.0%
- ALPHABET INC-$8.5M -5.2%
- ACCENTURE PLC IRELAND-$5.8M -21.2%
- SALESFORCE INC-$5.7M -23.5%
New Positions
- ISHARES TR$3.9M
- COMPASS INC$2.5M
- THE TRADE DESK INC$847.5K
- INVESTMENT MANAGERS SER TR I$770.0K
- ISHARES TR$734.8K
Exited Positions
- CYBERARK SOFTWARE LTD$802.9K
- ASTRAZENECA PLC$310.2K
- VEEVA SYS INC$281.3K
- VALERO ENERGY CORP$277.7K
- PAYPAL HLDGS INC$260.0K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | BERKSHIRE HATHAWAY INC DEL | BRK.B | 084670702 | $468.0M | 7.58% | 976,689 | SH |
| 2 | VANECK ETF TRUST | MOAT | 92189F643 | $258.7M | 4.19% | 2,675,294 | SH |
| 3 | APPLE INC | AAPL | 037833100 | $247.4M | 4.01% | 974,704 | SH |
| 4 | ISHARES TR | IJR | 464287804 | $195.0M | 3.16% | 1,568,315 | SH |
| 5 | MICROSOFT CORP | MSFT | 594918104 | $169.1M | 2.74% | 456,761 | SH |
| 6 | ISHARES TR | IVV | 464287200 | $159.2M | 2.58% | 243,758 | SH |
| 7 | INVESTMENT MANAGERS SER TR I | FPAG | 30254T577 | $158.3M | 2.56% | 4,363,542 | SH |
| 8 | ALPHABET INC | GOOG | 02079K107 | $155.8M | 2.52% | 543,230 | SH |
| 9 | ISHARES TR | ITOT | 464287150 | $150.2M | 2.43% | 1,054,680 | SH |
| 10 | ISHARES TR | IJH | 464287507 | $139.4M | 2.26% | 2,063,935 | SH |
| 11 | VANGUARD INDEX FDS | VOO | 922908363 | $124.2M | 2.01% | 207,880 | SH |
| 12 | ISHARES TR | IWR | 464287499 | $109.5M | 1.77% | 1,126,058 | SH |
| 13 | ALPHABET INC | GOOGL | 02079K305 | $107.2M | 1.74% | 372,655 | SH |
| 14 | JPMORGAN CHASE & CO | JPM | 46625H100 | $91.8M | 1.49% | 311,969 | SH |
| 15 | SPDR GOLD TR | GLD | 78463V107 | $87.3M | 1.41% | 202,840 | SH |
| 16 | AMAZON COM INC | AMZN | 023135106 | $84.9M | 1.38% | 407,829 | SH |
| 17 | STATE STR SPDR S&P 500 ETF T | SPY | 78462F103 | $84.4M | 1.37% | 129,793 | SH |
| 18 | VANGUARD WHITEHALL FDS | VYM | 921946406 | $81.8M | 1.32% | 552,464 | SH |
| 19 | ISHARES TR | IWF | 464287614 | $75.4M | 1.22% | 176,756 | SH |
| 20 | VANGUARD STAR FDS | VXUS | 921909768 | $75.0M | 1.21% | 972,639 | SH |
| 21 | ISHARES TR | EFA | 464287465 | $70.3M | 1.14% | 724,150 | SH |
| 22 | ISHARES TR | SGOV | 46436E718 | $69.5M | 1.13% | 690,898 | SH |
| 23 | CATERPILLAR INC | CAT | 149123101 | $63.7M | 1.03% | 89,940 | SH |
| 24 | RTX CORPORATION | RTX | 75513E101 | $55.7M | 0.90% | 288,890 | SH |
| 25 | T ROWE PRICE ETF INC | TCAF | 87283Q867 | $54.4M | 0.88% | 1,528,965 | SH |
| 26 | ISHARES TR | SHY | 464287457 | $53.0M | 0.86% | 641,570 | SH |
| 27 | BROADCOM INC | AVGO | 11135F101 | $49.5M | 0.80% | 160,012 | SH |
| 28 | FEDEX CORP | FDX | 31428X106 | $47.2M | 0.76% | 132,517 | SH |
| 29 | THERMO FISHER SCIENTIFIC INC | TMO | 883556102 | $44.4M | 0.72% | 90,383 | SH |
| 30 | ISHARES TR | IWD | 464287598 | $44.3M | 0.72% | 207,297 | SH |
| 31 | COSTCO WHOLESALE CORPORATION | COST | 22160K105 | $43.1M | 0.70% | 43,295 | SH |
| 32 | RBB FUND TRUST | FEGE | 75526L886 | $43.1M | 0.70% | 917,976 | SH |
| 33 | VANGUARD INDEX FDS | VUG | 922908736 | $43.0M | 0.70% | 98,383 | SH |
| 34 | NVIDIA CORPORATION | NVDA | 67066G104 | $42.6M | 0.69% | 244,268 | SH |
| 35 | VANGUARD TAX-MANAGED FDS | VEA | 921943858 | $42.5M | 0.69% | 663,651 | SH |
| 36 | VANGUARD SPECIALIZED FUNDS | VIG | 921908844 | $42.4M | 0.69% | 196,954 | SH |
| 37 | PROFESIONALLY MANAGED PORTFO | AKRE | 74316P579 | $42.1M | 0.68% | 797,393 | SH |
| 38 | CHEVRON CORPORATION | CVX | 166764100 | $41.5M | 0.67% | 200,475 | SH |
| 39 | ISHARES TR | IVE | 464287408 | $41.0M | 0.66% | 194,332 | SH |
| 40 | VANGUARD INDEX FDS | VTV | 922908744 | $40.8M | 0.66% | 208,072 | SH |
| 41 | BANK AMERICA CORP | BAC | 060505104 | $40.1M | 0.65% | 822,060 | SH |
| 42 | ISHARES TR | IEFA | 46432F842 | $39.8M | 0.64% | 439,624 | SH |
| 43 | LOWES COS INC | LOW | 548661107 | $39.6M | 0.64% | 167,659 | SH |
| 44 | INVESCO QQQ TR | QQQ | 46090E103 | $37.4M | 0.60% | 64,706 | SH |
| 45 | ISHARES TR | AOR | 464289867 | $36.2M | 0.59% | 563,116 | SH |
| 46 | ISHARES TR | IWP | 464287481 | $35.7M | 0.58% | 278,458 | SH |
| 47 | ABBVIE INC | ABBV | 00287Y109 | $34.5M | 0.56% | 158,536 | SH |
| 48 | ORACLE CORP | ORCL | 68389X105 | $34.2M | 0.55% | 232,362 | SH |
| 49 | UNION PAC CORP | UNP | 907818108 | $32.6M | 0.53% | 134,360 | SH |
| 50 | TE CONNECTIVITY PLC | TEL | G87052109 | $31.5M | 0.51% | 150,543 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-04-21 | $6.18B | 517 | 0001469475-26-000002 |
| 2025-12-31 | 2026-02-05 | $4.87B | 485 | 0001469475-26-000001 |