Last week saw a generally cautious market environment amid the ongoing geopolitical tensions between Israel and Iran, pushing Wall Street’s main indices to new week-on-week losses.

The S&P 500 led the drop with 1.03 percent, followed by the Dow Jones with 0.76 percent, and the Nasdaq, down 0.71 percent.

Ten companies also mirrored a broader market pessimism, booking hefty losses, primarily due to macroeconomic developments that dented investing appetite.

In this list, let us explore last week’s 10 worst-performing stocks alongside the reasons behind their drop.

To come up with the list, we considered only stocks with at least $2 billion in market capitalization and over 5 million in trading volume. The list was based on their closing prices on June 13 and 20, 2025.

10. AppLovin Corp. (NASDAQ:APP)

AppLovin dropped its share prices by 10.9 percent week-on-week, ending last Friday at $324.7 versus the $364.49 close on June 13, as investor sentiment was largely dented by Culper Research’s report that it was short on its stock over fears of national security risks due to misrepresentations on its Chinese operations.

In a market report last week, Culper Research claimed that AppLovin Corp. (NASDAQ:APP) “blatantly misrepresented the scope of both its Chinese shareholders and its Chinese operations, posing not only risks to shareholders, but national security.”

According to the investment firm, it believed AppLovin Corp. (NASDAQ:APP) was backed by Chinese national Hao Tang through a variety of offshore shell companies, owning as much as 9.8 percent of Class A shares.

AppLovin Corp. (NASDAQ:APP) repeatedly denied claims of Chinese ownership and ties to China.

Further adding to the sour sentiment was its non-inclusion in the recent S&P 500 index rebalancing, after two other investment firms expressed confidence earlier that it would join the index for meeting the criteria of $20.5 billion in market value and GAAP profitability over the past four quarters.

Getting included in the S&P 500 can be advantageous to stock components as it exposes them to a wider group of investors.

9. Bitdeer Technologies Group (NASDAQ:BTDR)

Bitdeer Technologies slashed its share prices by 11 percent in just a week’s trading, from $12.68 on June 13 to $11.28 last Friday, tracking the week-on-week drop in Bitcoin prices.

On Friday, prices of Bitcoin declined by 2.62 percent to $103,309.6 from $106,090.97 on June 13, as trading sentiment was largely dampened by the ongoing geopolitical tensions between Israel and Iran.

Additionally, investors appeared to have soured on Bitdeer Technologies Group’s (NASDAQ:BTDR) plans to raise $330 million through a debt issuance.

In a statement last week, Bitdeer Technologies Group (NASDAQ:BTDR) said that it plans to issue convertible senior notes to qualified institutional investors until Monday, June 23.

The notes carry a yield rate of 4.875 percent to be paid semiannually on January 1 and July 1 until 2031, unless earlier converted, redeemed, or repurchased.

According to Bitdeer Technologies Group (NASDAQ:BTDR), proceeds from the offer will be used for the payment of its zero-strike call option with an investor’s affiliate, concurrent note exchange transactions, as well as data center expansion, ASIC-based mining rig development, and other general corporate purposes.

8. Peloton Interactive, Inc. (NASDAQ:PTON)

Peloton Interactive dropped its share prices by 11.2 percent week-on-week, from $6.96 on June 13 to $6.18 last Friday, following two of its executives’ disposition of shares in the company.

In separate regulatory filings, Peloton Interactive, Inc. (NASDAQ:PTON) said its chief finance officer, Elizabeth Coddington, and chief product officer, Nick Caldwell, sold a significant chunk of their stakes last week.

Coddington, for her part, disposed of $269,322 worth of PTON stocks, covering 38,708 units at a price of $6.9578 apiece. Meanwhile, Caldwell sold worth $446,759, covering 63,925 shares at a price of $6.9888 apiece.

Investors typically view insider selling negatively, especially when a company states no reason for the sale.

In the third quarter of fiscal year 2025, Peloton Interactive, Inc. (NASDAQ:PTON) narrowed its net losses by 71.5 percent to $47.7 million from $167.3 million in the same period last year, pushing its nine-month losses down by 73 percent to $140.5 million from $521.4 million in the same comparable period.

Revenues for the last quarter declined by 13 percent to $624 million from $717.7 million year-on-year, while revenues for the nine-month period decreased by 8 percent to $1.883 billion from $2.056 billion.

7. Transocean Ltd. (NYSE:RIG)

Transocean Ltd. fell by 12.3 percent week-on-week, from $3.32 on June 13 to $2.91 last Friday, following an executive’s recent disposition of its shares, while digesting market uncertainties amid the ongoing conflict between Israel and Iran.

On June 13, Transocean Ltd. (NYSE:RIG) announced that its chief commercial officer, Roderick Mackenzie, sold 40,000 RIG shares at a price of $3.26 apiece for a total value of $130,488. Following the transaction, last week’s shortened trading saw Transocean Ltd. (NYSE:RIG) register four straight days of decline.

Investors typically view insider selling in a negative light, especially if the company failed to divulge the reason for the sale.

In recent news, Transocean Ltd. (NYSE:RIG) announced a new $100 million contract with an existing client, Equino ASA. The new deal forms part of the original three-well program on the Norwegian Continental Shelf (NCS), which was procured in 2024.

Under the agreement, Transocean Ltd. (NYSE:RIG) will drill two more wells for Equinor ASA at the Spitsbergen rig in Norway as part of the latter’s drilling extension option.

The program is expected to kick off in the first quarter of 2026 in direct continuation of the rig’s current program.

6. ADMA Biologics, Inc. (NASDAQ:ADMA)

ADMA Biologics fell by 14.7 percent week-on-week, closing Friday at $17.74 versus the $20.81 on June 13, as investors took path from three of its executives’ recent disposition of shares in the company.

In a regulatory filing, ADMA Biologics, Inc. (NASDAQ:ADMA) President and CEO Adam Grossman sold 21,000 ADMA shares at a price of $20.81 apiece on June 16 for a total value of $437,010. On the same day, he acquired 15,000 shares at a price of $5.4 apiece for a total of $81,000.

ADMA Biologics, Inc. (NASDAQ:ADMA) said that the transaction was in line with the Rule 10b5-1 trading plan entered into between Grossman and Fidelity Brokerage Services LLC.

The transaction followed sales activities made by the company’s chairman, Steven Elms, and founder and vice chairman, Jerrold Grossman.

For his part, Elms sold 425,621 of his shares in the company for an aggregate market value of $9.3 million, while Jerrold disposed of  10,000 shares at an aggregate market value of $206,100.

It is worth noting that ADMA Biologics, Inc.’s (NASDAQ:ADMA) closing price on Friday marked its sixth straight day of decline.

5. Chime Financial, Inc. (NASDAQ:CHYM)

Chime Financial marked its first week as a publicly listed company in the negative territory, having lost 15 percent to close Friday at $29.53 versus the $34.79 finish on June 13.

Its sour trading performance can be owed to the Senate’s passage of the Stablecoins bill, which would regulate the framework for the digital currency and heighten competition for traditional payment services providers.

Stablecoins are a type of currency designed to maintain a 1:1 ratio with the US dollar and are widely used by cryptocurrency traders to move funds between tokens.

Under the administration of President Donald Trump, Stablecoins gained momentum as an alternative payment method, emerging as a potential competitor to traditional payments companies, including Chime Financial, Inc. (NASDAQ:CHYM).

4. Redwire Corporation (NYSE:RDW)

Redwire fell by 16.9 percent week-on-week, from $19.08 on June 13 to $15.86 last Friday, as investors resorted to profit-taking while repositioning portfolios ahead of its presentation at the Jefferies Virtual Space Summit.

On Friday, Redwire Corporation (NYSE:RDW) announced that its chairman and chief executive officer, Peter Cannito, will present at the Jefferies Virtual Space Summit on June 24, 2025, from 1:20-1:50 PM ET.

Investors will be closely watching out for cues on Redwire Corporation’s (NYSE:RDW) updated outlook and plans for the rest of the year.

In other news, Redwire Corporation (NYSE:RDW) announced last week its successful acquisition of Edge Autonomy, a company providing unmanned aerial vehicle system technology, for $1.14 billion.

Edge Autonomy is a leader in providing autonomous systems and resilient energy solutions to the US Department of Defense, US Federal Civilian Agencies, and allied governments around the world.

3. First Solar, Inc. (NASDAQ:FSLR)

First Solar, Inc. (NASDAQ:FSLR) dropped its share prices by 17 percent last week, finishing Friday at $145 versus $175.2 on June 13, as investors continued to unload positions amid the proposed phase-out of solar and wind tax credits by 2028.

The proposal forms part of President Donald Trump’s One Big, Beautiful Bill Act, which seeks to secure historic tax cuts, deficit reduction, and border security, among others.

However, it would also result in millions of Americans stripped of existing benefits, including healthcare and solar tax credits, and largely impact investor sentiment in solar companies, including First Solar, Inc. (NASDAQ:FSLR).

Based on the draft bill being circulated by the Senate committee, tax incentives for solar and wind projects will be cut to 60 percent of their value in 2026, and totally end in 2028. Under the current law, the phase-out will not begin until 2032.

Following the risks, Reuters said Citi analysts remained a “sell” on residential solar.

2. Enphase Energy, Inc. (NASDAQ:ENPH)

Enphase Energy, Inc. (NASDAQ:ENPH) fell by 21.38 percent week-on-week to end Friday’s trading at $35.85 versus the $45.6 on June 13, as investors sold off positions amid proposals to phase out solar and wind tax credits by 2028.

Enphase Energy, Inc. (NASDAQ:ENPH) declined alongside its peers, such as First Solar, Inc. (NASDAQ:FSLR), amid the proposed cuts, which form part of President Donald Trump’s One Big, Beautiful Bill Act.

The draft bill seeks to secure historic tax cuts, deficit reduction, and border security, among others. However, it would also result in millions of Americans stripped of existing benefits, including healthcare and solar tax credits, impacting investor sentiment in solar companies.

Based on the draft bill being circulated by the Senate committee, tax incentives for solar and wind projects will be cut to 60 percent of their value in 2026, and totally end in 2028.

Under the current law, the phase-out will not begin until 2032.

1. Sarepta Therapeutics, Inc. (NASDAQ:SRPT)

Sarepta Therapeutics slashed its share price by 44 percent last week following price target cuts from two investment companies.

In a market note, Oppenheimer significantly lowered its price target for Sarepta Therapeutics, Inc. (NASDAQ:SRPT) to $45 from $123 previously, marking a 63-percent downside. The adjustment followed the death of a second patient from acute liver failure after taking its Elevidys treatment.

Following the news, the company temporarily halted Elevidys shipments for non-ambulatory patients and suspended its fiscal year 2025 product revenue guidance of $2.3 billion to $2.6 billion.

For its part, William Blair downgraded Sarepta Therapeutics, Inc. (NASDAQ:SRPT) to “market perform” from “outperform” previously on expectations of lower revenue opportunities despite continued strong interest in its Elevidys treatment.

According to William Blair, there is a growing number of “uncertain variables” that it believes would deter investors from buying stocks in the coming periods.

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