Gulfstream Capital

13F portfolio / Investment manager

RTW Investments

Roderick Wong (managing partner, CIO)

The firm is based in New York, NY, according to its SEC filings.

Its earliest 13F holdings report on SEC EDGAR was filed in February 2015.

SEC Form ADV lists Roderick Wong as managing partner and chief investment officer.

The 13F shows long US-listed stock and option positions only. It leaves out short positions, cash, bonds and most non-US holdings.

Reported 13F value
$11.7B
Positions
84
Est. 1-yearEstimate
+25.6%SPY +15.7%
Est. 3-year, annualizedEstimate
—SPY +22.8%

As of Jun 30, 2026 · filed Aug 14, 2026

Holdings

9 new · 24 added · 8 trimmed · 43 unchanged · 13 sold out

1MDGL on Yahoo Finance (opens in a new tab)Madrigal Pharmaceuticals IncCOM9.1%$1.1B1,993,687Unchanged$225.81*$447.74+98.3%
2ARGX on Yahoo Finance (opens in a new tab)Argenx SeSPONSORED ADR5.6%$658M709,446Unchanged$516.35*$816.79+58.2%
3PTCT on Yahoo Finance (opens in a new tab)PTC Therapeutics IncCOM5.4%$632M7,746,415Unchanged$31.70*$59.14+86.5%
4PTGX on Yahoo Finance (opens in a new tab)Protagonist Therapeutics IncCOM5.3%$620M5,061,175Unchanged$20.07*$127.72+536.5%
5CGON on Yahoo Finance (opens in a new tab)Cg Oncology IncCOM5.2%$605M8,514,590Added +21.9%$53.55$59.76+11.6%
6INSM on Yahoo Finance (opens in a new tab)Insmed IncCOM PAR $.014.4%$516M4,842,880Unchanged$87.43*$96.60+10.5%
7TNGX on Yahoo Finance (opens in a new tab)Tango Therapeutics IncCOM3.7%$435M13,900,620Added +4.5%$13.82$22.19+60.6%
8SYRE on Yahoo Finance (opens in a new tab)Spyre Therapeutics IncCOM NEW3.2%$377M4,251,996Added +1.9%$22.63$79.50+251.3%
9CELC on Yahoo Finance (opens in a new tab)Celcuity IncCOM3.0%$346M3,304,903Added +8.7%$105.08$55.10-47.6%
10ERAS on Yahoo Finance (opens in a new tab)Erasca IncCOM2.8%$329M17,946,754Added +11.1%$11.99$13.47+12.3%
11RDNT on Yahoo Finance (opens in a new tab)Radnet IncCOM2.6%$299M4,846,958Added +13.1%$56.22$68.57+22.0%
12ORKA on Yahoo Finance (opens in a new tab)Oruka Therapeutics IncCOM2.6%$299M3,139,030Added +52.5%$38.14$71.01+86.2%
13NTRA on Yahoo Finance (opens in a new tab)Natera IncCOM2.3%$271M1,000,000Trimmed -20.0%$51.43*$391.99+662.1%
14RARE on Yahoo Finance (opens in a new tab)Ultragenyx Pharmaceutical InCOM2.2%$260M7,796,895Added +113.7%$28.33*$14.69-48.2%
15IRTC on Yahoo Finance (opens in a new tab)Irhythm Holdings IncCOM2.2%$260M2,182,631Added +30.8%$155.51$110.21-29.1%
16CYTK on Yahoo Finance (opens in a new tab)Cytokinetics IncCOM NEW2.1%$244M2,862,003Added +5.2%$36.95*$62.22+68.4%
17KLRA on Yahoo Finance (opens in a new tab)Kailera Therapeutics IncCOMMON STOCK2.0%$237M10,776,820New$21.98$11.49-47.7%
18ESTA on Yahoo Finance (opens in a new tab)Establishment Labs Hldgs IncCOM1.9%$228M2,655,695Unchanged$51.67*$59.58+15.3%
19GH on Yahoo Finance (opens in a new tab)Guardant Health IncCOM1.9%$222M1,481,033Unchanged$48.77$159.15+226.3%
20NBIX on Yahoo Finance (opens in a new tab)Neurocrine Biosciences IncCOM1.8%$214M1,267,925Added +19.4%$120.15$136.24+13.4%
21TARS on Yahoo Finance (opens in a new tab)Tarsus Pharmaceuticals IncCOM1.8%$211M3,357,059Unchanged$21.87*$68.53+213.3%
22STOK on Yahoo Finance (opens in a new tab)Stoke Therapeutics IncCOM1.6%$184M5,623,525Unchanged$8.38*$24.20+189.0%
23QURE on Yahoo Finance (opens in a new tab)Uniqure NVSHS1.5%$182M3,941,572Added +52.4%$17.52$22.00+25.6%
24ACAD on Yahoo Finance (opens in a new tab)Acadia Pharmaceuticals IncCOM1.5%$181M7,144,524Unchanged$24.62*$19.18-22.1%
25RGEN on Yahoo Finance (opens in a new tab)Repligen CorpCOM1.4%$169M1,240,637Added +2.9%$153.75$173.41+12.8%
26URGN on Yahoo Finance (opens in a new tab)Urogen Pharma LtdCOM1.4%$167M4,543,895Unchanged$14.34*$34.63+141.5%
27GHRS on Yahoo Finance (opens in a new tab)Gh Research PLCORDINARY SHARES1.4%$160M5,933,815Unchanged$10.82*$18.08+67.1%
28IMCR on Yahoo Finance (opens in a new tab)Immunocore Hldgs PLCADS1.3%$155M4,869,798Unchanged$53.26*$30.01-43.7%
29CMPS on Yahoo Finance (opens in a new tab)Compass Pathways PLCSPONSORED ADS1.3%$151M10,700,974Added +0.6%$4.76$10.91+129.0%
30IMTX on Yahoo Finance (opens in a new tab)Immatics N.VSHS1.1%$131M12,946,176Added +0.6%$10.06*$6.75-32.9%
31ZLAB on Yahoo Finance (opens in a new tab)Zai Lab LtdADR1.1%$125M6,574,032Unchanged$25.69$23.64-8.0%
32IMVT on Yahoo Finance (opens in a new tab)Immunovant IncCOM1.0%$122M3,177,849Unchanged$22.30$26.54+19.0%
33BLTE on Yahoo Finance (opens in a new tab)Belite Bio IncSPONSORED ADS0.9%$110M715,332Unchanged$95.37$143.41+50.4%
34XNCR on Yahoo Finance (opens in a new tab)Xencor IncCOM0.9%$109M6,777,461Unchanged$13.91$22.91+64.7%
35TSHA on Yahoo Finance (opens in a new tab)Taysha Gene Therapies IncCOM SHS0.8%$92M13,560,258Trimmed -0.9%$2.30*$3.63+57.6%
36COGT on Yahoo Finance (opens in a new tab)Cogent Biosciences IncCOM0.8%$89M2,309,021Trimmed -57.7%$20.68$29.39+42.1%
37ALKS on Yahoo Finance (opens in a new tab)Alkermes PLCSHS0.7%$88M1,672,356Unchanged$27.15*$40.56+49.4%
38GPCR on Yahoo Finance (opens in a new tab)Structure Therapeutics IncSPONSORED ADS0.7%$86M1,607,507New$44.24$21.04-52.4%
39REPL on Yahoo Finance (opens in a new tab)Replimune Group IncCOM0.7%$82M7,411,581Added +0.7%$7.45$10.98+47.5%
40CSTL on Yahoo Finance (opens in a new tab)Castle Biosciences IncCOM0.6%$66M2,778,335Added +0.7%$32.29$31.95-1.0%
41CADL on Yahoo Finance (opens in a new tab)Candel Therapeutics IncCOM0.6%$66M6,422,018Unchanged$5.44$8.34+53.3%
42RCKT on Yahoo Finance (opens in a new tab)Rocket Pharmaceuticals IncCOM0.5%$60M17,687,772Unchanged$19.60*$2.24-88.6%
43KOD on Yahoo Finance (opens in a new tab)Kodiak Sciences IncCOM0.5%$58M1,487,934Unchanged$20.48$87.73+328.4%
44AKTS on Yahoo Finance (opens in a new tab)Aktis Oncology IncCOM0.4%$51M1,592,043Unchanged$19.42$15.01-22.7%
45AXGN on Yahoo Finance (opens in a new tab)Axogen IncCOM0.4%$47M1,011,576New$40.32$35.05-13.1%
46DHR on Yahoo Finance (opens in a new tab)Danaher Corp DelCOM0.4%$44M230,000New$180.89$229.01+26.6%
47CGEM on Yahoo Finance (opens in a new tab)Cullinan Therapeutics IncCOM0.4%$43M2,364,347Added +38.6%$18.52$13.19-28.8%
48NGNE on Yahoo Finance (opens in a new tab)Neurogene IncCOM0.4%$43M1,362,456Unchanged$34.49$23.59-31.6%
49HNGE on Yahoo Finance (opens in a new tab)Hinge Health IncCL A0.4%$42M500,000Trimmed -74.1%$42.77$99.42+132.5%
50OBIO on Yahoo Finance (opens in a new tab)Orchestra Biomed Hldgs IncCOM0.4%$41M9,556,063Added +15.0%$6.67*$5.41-18.9%
51SLDB on Yahoo Finance (opens in a new tab)Solid Biosciences IncCOM NEW0.3%$39M3,892,926New$7.58$5.59-26.3%
52SVRA on Yahoo Finance (opens in a new tab)Savara IncCOM0.3%$37M5,952,380Unchanged$4.90$4.51-8.0%
53AQST on Yahoo Finance (opens in a new tab)Aquestive Therapeutics IncCOM0.3%$31M7,426,471Unchanged$4.28$3.84-10.4%
54KYMR on Yahoo Finance (opens in a new tab)Kymera Therapeutics IncCOM0.2%$28M240,000Unchanged$67.53$105.08+55.6%
55VSTM on Yahoo Finance (opens in a new tab)Verastem IncCOM NEW0.2%$25M6,635,793Added +0.9%$6.82$8.79+28.9%
56DNTH on Yahoo Finance (opens in a new tab)Dianthus Therapeutics IncCOM0.2%$24M248,063Unchanged$57.91$69.69+20.4%
57BBNX on Yahoo Finance (opens in a new tab)Beta Bionics IncCOM0.2%$24M1,500,000Trimmed -25.0%$18.64$16.84-9.7%
58IPSC on Yahoo Finance (opens in a new tab)Century Therapeutics IncCOM0.2%$21M8,695,652Unchanged$2.10$1.42-32.2%
59EVMN on Yahoo Finance (opens in a new tab)Evommune IncCOM SHS0.2%$20M1,502,235Unchanged$19.34$5.27-72.8%
60BEAM on Yahoo Finance (opens in a new tab)Beam Therapeutics IncCOM0.2%$20M570,394Unchanged$25.51$23.26-8.8%
61DFTX on Yahoo Finance (opens in a new tab)Definium Therapeutics IncCOM SHS0.2%$19M400,000Added +33.3%$18.90$32.20+70.3%
62IDYA on Yahoo Finance (opens in a new tab)Ideaya Biosciences IncCOM0.1%$14M370,370New$30.61$33.12+8.2%
63—Ataibeckley IncCOM SHS0.1%$11M2,000,000Unchanged———
64MIST on Yahoo Finance (opens in a new tab)Milestone Pharmaceuticals InCOM0.1%$10M7,833,336Added +23.7%$2.12*$0.72-65.9%
65OCGN on Yahoo Finance (opens in a new tab)Ocugen IncCOM0.1%$10M6,666,666Unchanged$1.73$0.81-53.4%
66TENX on Yahoo Finance (opens in a new tab)Tenax Therapeutics IncCOM NEW0.1%$10M696,570Added +88.1%$9.39$1.40-85.0%
67HTFL on Yahoo Finance (opens in a new tab)Heartflow IncCOM0.1%$9M295,000Trimmed -40.4%$32.24$48.98+51.9%
68FRNM on Yahoo Finance (opens in a new tab)Perceptive Cap Solutions CorCL A ORD SHS0.1%$8M742,500Unchanged$10.07$11.83+17.4%
69WVE on Yahoo Finance (opens in a new tab)Wave Life Sciences LtdSHS0.1%$8M1,350,000Unchanged$7.37$3.11-57.9%
70LRMR on Yahoo Finance (opens in a new tab)Larimar Therapeutics IncCOM0.1%$8M2,565,999Added +71.1%$3.84$2.04-46.9%
71LMRI on Yahoo Finance (opens in a new tab)Lumexa Imaging Holdings IncCOM0.1%$7M650,000Unchanged$18.05$10.85-39.9%
72ALLO on Yahoo Finance (opens in a new tab)Allogene Therapeutics IncCOM0.1%$7M3,250,000New$2.20$1.32-39.9%
73CBIO on Yahoo Finance (opens in a new tab)Crescent Biopharma Inc.COM0.1%$7M372,856Unchanged$12.74$12.07-5.3%
74FDMT on Yahoo Finance (opens in a new tab)4d Molecular Therapeutics InCOM0.1%$6M475,737Unchanged$10.14$12.28+21.1%
75MAZE on Yahoo Finance (opens in a new tab)Maze Therapeutics IncCOM0.1%$6M212,000New$26.21$27.24+3.9%
76CAPR on Yahoo Finance (opens in a new tab)Capricor Therapeutics IncCOM NEW0.1%$6M250,000Unchanged$13.06$6.73-48.5%
77KLRS on Yahoo Finance (opens in a new tab)Kalaris Therapeutics IncCOM0.0%$5M1,300,000Unchanged$6.39$2.24-65.0%
78ABVX on Yahoo Finance (opens in a new tab)Abivax SASPONSORED ADS0.0%$4M26,400New$113.18$87.77-22.4%
79AVTX on Yahoo Finance (opens in a new tab)Avalo Therapeutics IncCOM NEW0.0%$3M175,000Trimmed -79.6%$15.64$11.35-27.4%
80MDLN on Yahoo Finance (opens in a new tab)Medline IncCOM CL A0.0%$3M70,000Unchanged$42.23$36.44-13.7%
81IRON on Yahoo Finance (opens in a new tab)Disc Medicine IncCOM0.0%$2M30,000Unchanged$84.50$56.21-33.5%
82IMA on Yahoo Finance (opens in a new tab)Imagenebio IncCOM0.0%$2M334,445Unchanged$13.25$4.05-69.4%
83XGN on Yahoo Finance (opens in a new tab)Exagen IncCOM0.0%$907K195,000Trimmed -50.7%$2.79*$7.72+176.5%
84RCKT on Yahoo Finance (opens in a new tab)Rocket Pharmaceuticals Inc*W EXP 09/02/2020.0%$1K350,000Unchanged$19.60*$2.24-88.6%

Sold out since Q1 2026

Estimated, from reported holdings

Quarter by quarter

Q4 2023: est. holdings +20.9%Q4 2023: S&P 500 (SPY) +11.6%Q4 ’23Q3 2024: est. holdings +4.0%Q3 2024: S&P 500 (SPY) +5.8%Q3 ’24Q4 2024: est. holdings -0.2%Q4 2024: S&P 500 (SPY) +2.5%Q4 ’24Q1 2025: est. holdings -4.2%Q1 2025: S&P 500 (SPY) -4.3%Q1 ’25Q2 2025: est. holdings +0.6%Q2 2025: S&P 500 (SPY) +10.8%Q2 ’25Q4 2025: est. holdings +20.6%Q4 2025: S&P 500 (SPY) +2.7%Q4 ’25Q1 2026: est. holdings -6.9%Q1 2026: S&P 500 (SPY) -4.4%Q1 ’26Q2 2026: est. holdings +16.9%Q2 2026: S&P 500 (SPY) +15.1%Q2 ’26Q3 2026: est. holdings -4.3%Q3 2026: S&P 500 (SPY) +2.4%Q3 ’26
Estimated holdings return S&P 500 (SPY), by quarter

High-conviction buys (new positions at 3% or more of the portfolio) since Q3 2023: 0. Of 0 with six months of history, — beat the S&P 500 from the filing date.

Source: SEC Form 13F-HR 0001493215-26-000164, compared with the Q1 2026 report. 0 option rows are excluded from weights. Tickers map from CUSIP via OpenFIGI. Estimated returns weight each position’s next-quarter total return (Yahoo Finance adjusted closes) by its quarter-end value and assume no trades. Estimated cost averages daily adjusted closes in each quarter the share count rose, from Q3 2023 onward (* = held at the start of our data). Price is the latest close.

Important information

Form 13F data is delayed. Managers have up to 45 days after each calendar quarter to file, so holdings shown may have changed materially since the report date. 13F reports cover long positions in US-listed equities and certain other securities only; they exclude short positions, most non-US holdings, cash, bonds and private investments, and managers may request confidential treatment for some positions. Options rows are listed in filings but are not counted in the holdings and weights shown here.

Estimated holdings returns, estimated cost and high-conviction results are hypothetical calculations from quarter-end holdings and public prices, assuming no trades between reports. They are not the actual returns or costs of any fund or manager and do not reflect fees, trading, leverage, shorts or cash. Biographies are drawn from cited public sources. This page is for information only and is not individualized investment advice or a recommendation to buy or sell any security. Gulfstream Capital and its clients may hold positions in securities shown.