The Saints re-signed Nasiah Wanganeen-Milera on a $2 million-per-year contract and landed free agents Tom De Koning and Jack Silvagni on big-money deals.
And they are also poised to secure Gold Coast's Sam Flanders, West Coast forward Liam Ryan and GWS defender Leek Aleer via trades.
Asked if St Kilda's business would be done after that, Saints list boss Graeme Allan said: "No, we're still going.
"We've got plenty of money to splash. We can go fishing. We can still go fishing."
St Kilda have already splurged millions on a select group of players in the off-season.
Allan was pressed on how tricky it would be for the Saints to fit all their recruits and trade targets under the salary cap.
"Not a problem," he quipped.
"We'll go hunting again next year. We've got plenty of money."
Allan said retaining budding superstar Wanganeen-Milera had been crucial to the Saints' recruiting blitz.
"Without Nas signing, I'm not sure I'd be here talking to you guys," Allan said.
"(We) mightn't have anything on the table."
Allan expects St Kilda's first round pick, currently No.7, to be a "straight swap" for Flanders.
Ruckman Rowan Marshall wants to go to Geelong but St Kilda are prepared to keep him if there isn't a satisfactory deal, while as yet there are no offers for Jack Steele.
Elsewhere, Carlton and Essendon are standing firm on Charlie Curnow and Zach Merrett, adamant their contracted stars are going nowhere.
Geelong and Sydney are interested in Curnow, who became frustrated at the Blues this season and would like to move out of Melbourne for lifestyle reasons.
But the two-time Coleman Medal winner is contracted to the end of 2029 and Carlton football manager Chris Davies expects Curnow to remain in navy blue next year.
"The club's made it really clear that from our perspective Charlie's got four years on a deal and we expect him to be at Carlton for those four years," Davies said when the trade period officially opened on Monday.
"I don't think it's going to be helpful for me to go into hypotheticals right now."
Sydney list boss Chris Keane confirmed the Swans are interested in Curnow and have spoken to him directly.
Geelong football boss Andrew Mackie conceded the Curnow trade "realistically is going to be hard to do" for the Cats.
Essendon were blindsided last month when captain Merrett, who is contracted until 2027, met with Hawthorn coach Sam Mitchell.
The 30-year-old has since admitted feeling "a bit of shame" over the situation and last week won his sixth Bombers best-and-fairest award.
"It's been an interesting little period but nothing's really changed," Essendon list manager Matt Rosa said.
"Clearly Zach has been gathering information and, as we've stated as a club, Zach's a champion of our football club and he's a required.
"Conversations are ongoing though and there's been really good dialogue between Zach and the club, but Zach will be an Essendon player next year."
Merrett, like Curnow, is yet to formally request a trade.
"If he does, nothing will change from our end and Zach's fully aware of that," Rosa said.
"He's a contracted player and he's at the age where we still feel like he's got plenty of football left to play."
Hawthorn list manager Mark McKenzie gave little away on Merrett other than to confirm his club's interest.
The Curnow and Merrett sagas are expected to drag on through the trade period, which closes on October 15.
No trade business was completed on day one.
Unrestricted free agents Charlie Spargo (Melbourne to North Melbourne) and Jacob Wehr (GWS to Port Adelaide) were the only players to switch clubs on Monday.
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