Disc Medicine Ownership | Who Owns Disc Medicine?

Disc Medicine Ownership Summary

Disc Medicine is owned by 111.68% institutional investors, 7.74% insiders. Fmr is the largest institutional shareholder, holding 12.72% of IRON shares. Strategic Advisers Fidelity US TtlStk is the top mutual fund, with 4.97% of its assets in Disc Medicine shares.

IRON Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Disc Medicine	111.68%	7.74%	-19.43%
Sector	Healthcare Stocks	245.07%	12.10%	-157.17%
Industry	Biotech Stocks	380.48%	11.73%	-292.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	4.89M	12.72%	$357.98M
Blackrock funding, inc. /de	2.47M	6.41%	$180.50M
Ra capital management	2.45M	6.37%	$179.21M
Vanguard group	1.77M	5.02%	$140.37M
Jpmorgan chase	1.88M	4.87%	$139.87M
Price t rowe associates inc /md/	1.88M	4.87%	$137.17M
Wellington management group llp	1.74M	4.52%	$127.36M
State street	1.65M	4.28%	$120.60M
Vestal point capital, lp	1.55M	4.03%	$113.37M
Atlas venture life science advisors	1.51M	3.93%	$110.72M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Atlas venture life science advisors	1.51M	12.56%	$110.72M
Foresite capital management v	374.07K	7.55%	$27.36M
Opaleye management	855.00K	5.66%	$62.53M
Saturn v capital management	524.73K	5.50%	$38.38M
Checkpoint capital	240.13K	4.51%	$17.56M
Palo alto investors lp	416.65K	4.21%	$30.47M
Lion point capital, lp	8.10K	2.83%	$592.43K
Logos global management lp	875.00K	2.75%	$64.00M
Vestal point capital, lp	1.55M	2.65%	$113.37M
Tcg crossover management	1.34M	2.36%	$98.14M

Top Buyers

Holder	Shares	% Assets	Change
Vestal point capital, lp	1.55M	2.65%	850.00K
Jpmorgan chase	1.88M	0.01%	504.31K
Opaleye management	855.00K	5.66%	434.00K
Price t rowe associates inc /md/	1.88M	0.01%	326.05K
Vanguard group	1.77M	0.00%	319.62K

Top Sellers

Holder	Shares	% Assets	Change
Paradigm biocapital advisors lp	247.72K	0.47%	-963.25K
Orbimed advisors	357.54K	0.49%	-710.01K
Fmr	4.89M	0.02%	-692.42K
Goldman sachs group	97.38K	0.00%	-542.46K
First light asset management	-	-	-523.17K

New Positions

Holder	Shares	% Assets	Change	Value
Sixth street partners management company	257.38K	0.00%	257.38K	$18.82M
Two sigma investments, lp	136.75K	0.01%	136.75K	$10.00M
Trexquant investment lp	107.70K	0.05%	107.70K	$7.88M
Hrt financial lp	90.82K	0.01%	90.82K	$6.64M
Quadrature capital	42.42K	0.03%	42.42K	$3.10M

Sold Out

Holder	Change
Twin peaks wealth advisors	-1.00
True wealth design	-1.00
Mai capital management	-3.00
Parallel advisors	-4.00
Root financial partners	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	231	10.53%	42,988,077	2.60%	111	0.79%	119	-9.16%	65	51.16%
Mar 31, 2026	205	3.02%	41,801,986	9.16%	118	1.00%	128	-	43	-12.24%
Dec 31, 2025	44	-74.42%	5,560,393	-83.75%	15	0.17%	31	-64.37%	8	-82.98%
Sep 30, 2025	51	-66.45%	3,188,170	-90.64%	9	0.10%	26	-73.20%	13	-63.89%
Jun 30, 2025	151	-4.43%	34,062,461	12.23%	97	1.17%	96	-4.00%	36	16.13%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Strategic Advisers Fidelity US TtlStk	1.91M	4.97%	-3.90K
Vanguard Total Stock Mkt Idx Inv	971.12K	2.54%	-13.85K
Vanguard Morn Total Stk Mkt Idx Investor	971.12K	2.54%	-13.85K
Vanguard MStar Total Stk Mkt Idx Invest	974.61K	2.54%	-2.17K
JPMorgan Mid Cap Growth I	829.14K	2.16%	181.35K
iShares Russell 2000 ETF	741.02K	1.93%	6.34K
State Street® SPDR® S&P® Biotech ETF	738.31K	1.92%	8.31K
JPM US Mid Cap Growth-Composite	647.79K	1.70%	262.08K
US Small-Cap Growth II Equity Comp	566.76K	1.48%	61.77K
T. Rowe Price New Horizons	516.16K	1.34%	-21.09K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 11, 2026	Bitterman Kevin	-	Sell	$1.90M
Sep 04, 2026	Bitterman Kevin	-	Sell	$1.44K
Sep 04, 2026	Bitterman Kevin	-	Sell	$72.92K
Sep 04, 2026	Bitterman Kevin	-	Sell	$60.69K
Sep 01, 2026	Bitterman Kevin	-	Sell	$4.64K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	27
2026 Q2	-	15
2026 Q1	-	15
2025 Q4	-	58
2025 Q3	-	12

IRON Ownership FAQ

Who Owns Disc Medicine?

Disc Medicine shareholders are primarily institutional investors at 111.68%, followed by 7.74% insiders and -19.42% retail investors. The average institutional ownership in Disc Medicine's industry, Biotech Stocks , is 380.48%, which Disc Medicine falls below.

Who owns the most shares of Disc Medicine?

Disc Medicine’s largest shareholders are Fmr (4.89M shares, 12.72%), Blackrock funding, inc. /de (2.47M shares, 6.41%), and Ra capital management (2.45M shares, 6.37%). Together, they hold 25.49% of Disc Medicine’s total shares outstanding.

Does Blackrock own Disc Medicine?

BlackRock is not among the top 10 institutional shareholders of Disc Medicine.

Who is Disc Medicine’s biggest shareholder by percentage of total assets invested?

Atlas venture life science advisors is Disc Medicine’s biggest shareholder by percentage of total assets invested, with 12.56% of its assets in 1.51M Disc Medicine shares, valued at 110.72M$.

Who is the top mutual fund holder of Disc Medicine shares?

Strategic Advisers Fidelity US TtlStk is the top mutual fund holder of Disc Medicine shares, with 4.97% of its total shares outstanding invested in 1.91M Disc Medicine shares.

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